aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorJeff Dike <jdike@addtoit.com>2007-10-16 04:26:58 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 12:43:05 -0400
commit77bf4400319db9d2a8af6b00c2be6faa0f3d07cb (patch)
treeddc8fd48349b8d4dd2c0b26bce7f52f79b4e4077
parentae2587e41254e48e670346aefa332d7469d86352 (diff)
uml: remove code made redundant by CHOOSE_MODE removal
This patch makes a number of simplifications enabled by the removal of CHOOSE_MODE. There were lots of functions that looked like int foo(args){ foo_skas(args); } The bodies of foo_skas are now folded into foo, and their declarations (and sometimes entire header files) are deleted. In addition, the union uml_pt_regs, which was a union between the tt and skas register formats, is now a struct, with the tt-mode arm of the union being removed. It turns out that usr2_handler was unused, so it is gone. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat
-rw-r--r--arch/um/drivers/harddog_user.c1
-rw-r--r--arch/um/include/arch.h4
-rw-r--r--arch/um/include/as-layout.h2
-rw-r--r--arch/um/include/irq_user.h2
-rw-r--r--arch/um/include/kern_util.h22
-rw-r--r--arch/um/include/mconsole.h2
-rw-r--r--arch/um/include/mode.h11
-rw-r--r--arch/um/include/mode_kern.h11
-rw-r--r--arch/um/include/os.h6
-rw-r--r--arch/um/include/registers.h6
-rw-r--r--arch/um/include/skas/mmu-skas.h2
-rw-r--r--arch/um/include/skas/mode_kern_skas.h42
-rw-r--r--arch/um/include/skas/skas.h2
-rw-r--r--arch/um/include/sysdep-i386/ptrace.h59
-rw-r--r--arch/um/include/sysdep-x86_64/ptrace.h88
-rw-r--r--arch/um/include/task.h2
-rw-r--r--arch/um/kernel/exec.c20
-rw-r--r--arch/um/kernel/irq.c4
-rw-r--r--arch/um/kernel/physmem.c4
-rw-r--r--arch/um/kernel/process.c120
-rw-r--r--arch/um/kernel/ptrace.c6
-rw-r--r--arch/um/kernel/reboot.c21
-rw-r--r--arch/um/kernel/signal.c1
-rw-r--r--arch/um/kernel/skas/Makefile2
-rw-r--r--arch/um/kernel/skas/exec.c40
-rw-r--r--arch/um/kernel/skas/mem.c22
-rw-r--r--arch/um/kernel/skas/mmu.c4
-rw-r--r--arch/um/kernel/skas/process.c158
-rw-r--r--arch/um/kernel/skas/syscall.c4
-rw-r--r--arch/um/kernel/skas/tlb.c164
-rw-r--r--arch/um/kernel/syscall.c1
-rw-r--r--arch/um/kernel/time.c7
-rw-r--r--arch/um/kernel/tlb.c134
-rw-r--r--arch/um/kernel/trap.c10
-rw-r--r--arch/um/kernel/um_arch.c22
-rw-r--r--arch/um/os-Linux/aio.c1
-rw-r--r--arch/um/os-Linux/main.c1
-rw-r--r--arch/um/os-Linux/process.c3
-rw-r--r--arch/um/os-Linux/registers.c12
-rw-r--r--arch/um/os-Linux/signal.c5
-rw-r--r--arch/um/os-Linux/skas/mem.c4
-rw-r--r--arch/um/os-Linux/skas/process.c24
-rw-r--r--arch/um/os-Linux/skas/trap.c14
-rw-r--r--arch/um/os-Linux/start_up.c1
-rw-r--r--arch/um/os-Linux/trap.c8
-rw-r--r--arch/um/os-Linux/umid.c1
-rw-r--r--arch/um/sys-i386/bugs.c2
-rw-r--r--arch/um/sys-i386/fault.c2
-rw-r--r--arch/um/sys-i386/ldt.c7
-rw-r--r--arch/um/sys-i386/ptrace.c10
-rw-r--r--arch/um/sys-i386/signal.c86
-rw-r--r--arch/um/sys-i386/tls.c4
-rw-r--r--arch/um/sys-x86_64/bugs.c2
-rw-r--r--arch/um/sys-x86_64/fault.c2
-rw-r--r--arch/um/sys-x86_64/signal.c35
-rw-r--r--arch/um/sys-x86_64/syscalls.c9
-rw-r--r--arch/um/sys-x86_64/tls.c2
-rw-r--r--include/asm-um/mmu_context.h20
-rw-r--r--include/asm-um/processor-generic.h16
-rw-r--r--include/asm-um/ptrace-generic.h4
-rw-r--r--include/asm-um/ptrace-i386.h17
-rw-r--r--include/asm-um/ptrace-x86_64.h13
-rw-r--r--include/asm-um/tlbflush.h13
63 files changed, 512 insertions, 812 deletions
diff --git a/arch/um/drivers/harddog_user.c b/arch/um/drivers/harddog_user.c
index b050e267befe..19ea26f32f14 100644
--- a/arch/um/drivers/harddog_user.c
+++ b/arch/um/drivers/harddog_user.c
@@ -9,7 +9,6 @@
9#include "user.h" 9#include "user.h"
10#include "mconsole.h" 10#include "mconsole.h"
11#include "os.h" 11#include "os.h"
12#include "mode.h"
13 12
14struct dog_data { 13struct dog_data {
15 int stdin; 14 int stdin;
diff --git a/arch/um/include/arch.h b/arch/um/include/arch.h
index 10ad52daa8c5..49c601ff2bac 100644
--- a/arch/um/include/arch.h
+++ b/arch/um/include/arch.h
@@ -9,7 +9,7 @@
9#include "sysdep/ptrace.h" 9#include "sysdep/ptrace.h"
10 10
11extern void arch_check_bugs(void); 11extern void arch_check_bugs(void);
12extern int arch_fixup(unsigned long address, union uml_pt_regs *regs); 12extern int arch_fixup(unsigned long address, struct uml_pt_regs *regs);
13extern int arch_handle_signal(int sig, union uml_pt_regs *regs); 13extern int arch_handle_signal(int sig, struct uml_pt_regs *regs);
14 14
15#endif 15#endif
diff --git a/arch/um/include/as-layout.h b/arch/um/include/as-layout.h
index e44f32940f8a..2f16a1c7d616 100644
--- a/arch/um/include/as-layout.h
+++ b/arch/um/include/as-layout.h
@@ -29,6 +29,6 @@ extern unsigned long brk_start;
29 29
30extern int linux_main(int argc, char **argv); 30extern int linux_main(int argc, char **argv);
31 31
32extern void (*sig_info[])(int, union uml_pt_regs *); 32extern void (*sig_info[])(int, struct uml_pt_regs *);
33 33
34#endif 34#endif
diff --git a/arch/um/include/irq_user.h b/arch/um/include/irq_user.h
index 741cb7d6f859..e16ebce1290d 100644
--- a/arch/um/include/irq_user.h
+++ b/arch/um/include/irq_user.h
@@ -21,7 +21,7 @@ struct irq_fd {
21 21
22enum { IRQ_READ, IRQ_WRITE }; 22enum { IRQ_READ, IRQ_WRITE };
23 23
24extern void sigio_handler(int sig, union uml_pt_regs *regs); 24extern void sigio_handler(int sig, struct uml_pt_regs *regs);
25extern int activate_fd(int irq, int fd, int type, void *dev_id); 25extern int activate_fd(int irq, int fd, int type, void *dev_id);
26extern void free_irq_by_irq_and_dev(unsigned int irq, void *dev_id); 26extern void free_irq_by_irq_and_dev(unsigned int irq, void *dev_id);
27extern void free_irq_by_fd(int fd); 27extern void free_irq_by_fd(int fd);
diff --git a/arch/um/include/kern_util.h b/arch/um/include/kern_util.h
index 578156db3039..9d3110f41ddb 100644
--- a/arch/um/include/kern_util.h
+++ b/arch/um/include/kern_util.h
@@ -10,7 +10,7 @@
10#include "sysdep/faultinfo.h" 10#include "sysdep/faultinfo.h"
11#include "uml-config.h" 11#include "uml-config.h"
12 12
13typedef void (*kern_hndl)(int, union uml_pt_regs *); 13typedef void (*kern_hndl)(int, struct uml_pt_regs *);
14 14
15struct kern_handlers { 15struct kern_handlers {
16 kern_hndl relay_signal; 16 kern_hndl relay_signal;
@@ -41,7 +41,7 @@ extern unsigned long alloc_stack(int order, int atomic);
41extern int do_signal(void); 41extern int do_signal(void);
42extern int is_stack_fault(unsigned long sp); 42extern int is_stack_fault(unsigned long sp);
43extern unsigned long segv(struct faultinfo fi, unsigned long ip, 43extern unsigned long segv(struct faultinfo fi, unsigned long ip,
44 int is_user, union uml_pt_regs *regs); 44 int is_user, struct uml_pt_regs *regs);
45extern int handle_page_fault(unsigned long address, unsigned long ip, 45extern int handle_page_fault(unsigned long address, unsigned long ip,
46 int is_write, int is_user, int *code_out); 46 int is_write, int is_user, int *code_out);
47extern void syscall_ready(void); 47extern void syscall_ready(void);
@@ -54,7 +54,7 @@ extern int need_finish_fork(void);
54extern void free_stack(unsigned long stack, int order); 54extern void free_stack(unsigned long stack, int order);
55extern void add_input_request(int op, void (*proc)(int), void *arg); 55extern void add_input_request(int op, void (*proc)(int), void *arg);
56extern char *current_cmd(void); 56extern char *current_cmd(void);
57extern void timer_handler(int sig, union uml_pt_regs *regs); 57extern void timer_handler(int sig, struct uml_pt_regs *regs);
58extern int set_signals(int enable); 58extern int set_signals(int enable);
59extern int pid_to_processor_id(int pid); 59extern int pid_to_processor_id(int pid);
60extern void deliver_signals(void *t); 60extern void deliver_signals(void *t);
@@ -64,9 +64,9 @@ extern void finish_fork(void);
64extern void paging_init(void); 64extern void paging_init(void);
65extern void init_flush_vm(void); 65extern void init_flush_vm(void);
66extern void *syscall_sp(void *t); 66extern void *syscall_sp(void *t);
67extern void syscall_trace(union uml_pt_regs *regs, int entryexit); 67extern void syscall_trace(struct uml_pt_regs *regs, int entryexit);
68extern int hz(void); 68extern int hz(void);
69extern unsigned int do_IRQ(int irq, union uml_pt_regs *regs); 69extern unsigned int do_IRQ(int irq, struct uml_pt_regs *regs);
70extern void interrupt_end(void); 70extern void interrupt_end(void);
71extern void initial_thread_cb(void (*proc)(void *), void *arg); 71extern void initial_thread_cb(void (*proc)(void *), void *arg);
72extern int debugger_signal(int status, int pid); 72extern int debugger_signal(int status, int pid);
@@ -76,9 +76,9 @@ extern int init_ptrace_proxy(int idle_pid, int startup, int stop);
76extern int init_parent_proxy(int pid); 76extern int init_parent_proxy(int pid);
77extern int singlestepping(void *t); 77extern int singlestepping(void *t);
78extern void check_stack_overflow(void *ptr); 78extern void check_stack_overflow(void *ptr);
79extern void relay_signal(int sig, union uml_pt_regs *regs); 79extern void relay_signal(int sig, struct uml_pt_regs *regs);
80extern int user_context(unsigned long sp); 80extern int user_context(unsigned long sp);
81extern void timer_irq(union uml_pt_regs *regs); 81extern void timer_irq(struct uml_pt_regs *regs);
82extern void do_uml_exitcalls(void); 82extern void do_uml_exitcalls(void);
83extern int attach_debugger(int idle_pid, int pid, int stop); 83extern int attach_debugger(int idle_pid, int pid, int stop);
84extern int config_gdb(char *str); 84extern int config_gdb(char *str);
@@ -109,11 +109,9 @@ extern void time_init_kern(void);
109 109
110/* Are we disallowed to sleep? Used to choose between GFP_KERNEL and GFP_ATOMIC. */ 110/* Are we disallowed to sleep? Used to choose between GFP_KERNEL and GFP_ATOMIC. */
111extern int __cant_sleep(void); 111extern int __cant_sleep(void);
112extern void sigio_handler(int sig, union uml_pt_regs *regs); 112extern void sigio_handler(int sig, struct uml_pt_regs *regs);
113 113extern void copy_sc(struct uml_pt_regs *regs, void *from);
114extern void copy_sc(union uml_pt_regs *regs, void *from);
115
116extern unsigned long to_irq_stack(unsigned long *mask_out); 114extern unsigned long to_irq_stack(unsigned long *mask_out);
117unsigned long from_irq_stack(int nested); 115unsigned long from_irq_stack(int nested);
118 116extern int start_uml(void);
119#endif 117#endif
diff --git a/arch/um/include/mconsole.h b/arch/um/include/mconsole.h
index b282839c1625..a2c35fecd1f5 100644
--- a/arch/um/include/mconsole.h
+++ b/arch/um/include/mconsole.h
@@ -63,7 +63,7 @@ struct mc_request
63 63
64 struct mconsole_request request; 64 struct mconsole_request request;
65 struct mconsole_command *cmd; 65 struct mconsole_command *cmd;
66 union uml_pt_regs regs; 66 struct uml_pt_regs regs;
67}; 67};
68 68
69extern char mconsole_socket_name[]; 69extern char mconsole_socket_name[];
diff --git a/arch/um/include/mode.h b/arch/um/include/mode.h
deleted file mode 100644
index fcce95cbc16a..000000000000
--- a/arch/um/include/mode.h
+++ /dev/null
@@ -1,11 +0,0 @@
1/*
2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
5
6#ifndef __MODE_H__
7#define __MODE_H__
8
9#include "mode-skas.h"
10
11#endif
diff --git a/arch/um/include/mode_kern.h b/arch/um/include/mode_kern.h
deleted file mode 100644
index b2a44c0dcd00..000000000000
--- a/arch/um/include/mode_kern.h
+++ /dev/null
@@ -1,11 +0,0 @@
1/*
2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
5
6#ifndef __MODE_KERN_H__
7#define __MODE_KERN_H__
8
9#include "mode_kern_skas.h"
10
11#endif
diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index 208d9b91fc93..daf188843a94 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -281,9 +281,9 @@ extern int protect(struct mm_id * mm_idp, unsigned long addr,
281extern int is_skas_winch(int pid, int fd, void *data); 281extern int is_skas_winch(int pid, int fd, void *data);
282extern int start_userspace(unsigned long stub_stack); 282extern int start_userspace(unsigned long stub_stack);
283extern int copy_context_skas0(unsigned long stack, int pid); 283extern int copy_context_skas0(unsigned long stack, int pid);
284extern void save_registers(int pid, union uml_pt_regs *regs); 284extern void save_registers(int pid, struct uml_pt_regs *regs);
285extern void restore_registers(int pid, union uml_pt_regs *regs); 285extern void restore_registers(int pid, struct uml_pt_regs *regs);
286extern void userspace(union uml_pt_regs *regs); 286extern void userspace(struct uml_pt_regs *regs);
287extern void map_stub_pages(int fd, unsigned long code, 287extern void map_stub_pages(int fd, unsigned long code,
288 unsigned long data, unsigned long stack); 288 unsigned long data, unsigned long stack);
289extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void)); 289extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void));
diff --git a/arch/um/include/registers.h b/arch/um/include/registers.h
index b7d2c4e2c613..8e8ea9651189 100644
--- a/arch/um/include/registers.h
+++ b/arch/um/include/registers.h
@@ -9,11 +9,11 @@
9#include "sysdep/ptrace.h" 9#include "sysdep/ptrace.h"
10#include "sysdep/archsetjmp.h" 10#include "sysdep/archsetjmp.h"
11 11
12extern void init_thread_registers(union uml_pt_regs *to); 12extern void init_thread_registers(struct uml_pt_regs *to);
13extern int save_fp_registers(int pid, unsigned long *fp_regs); 13extern int save_fp_registers(int pid, unsigned long *fp_regs);
14extern int restore_fp_registers(int pid, unsigned long *fp_regs); 14extern int restore_fp_registers(int pid, unsigned long *fp_regs);
15extern void save_registers(int pid, union uml_pt_regs *regs); 15extern void save_registers(int pid, struct uml_pt_regs *regs);
16extern void restore_registers(int pid, union uml_pt_regs *regs); 16extern void restore_registers(int pid, struct uml_pt_regs *regs);
17extern void init_registers(int pid); 17extern void init_registers(int pid);
18extern void get_safe_registers(unsigned long *regs); 18extern void get_safe_registers(unsigned long *regs);
19extern unsigned long get_thread_reg(int reg, jmp_buf *buf); 19extern unsigned long get_thread_reg(int reg, jmp_buf *buf);
diff --git a/arch/um/include/skas/mmu-skas.h b/arch/um/include/skas/mmu-skas.h
index b26986c0c3d2..838dfd75e2aa 100644
--- a/arch/um/include/skas/mmu-skas.h
+++ b/arch/um/include/skas/mmu-skas.h
@@ -18,6 +18,6 @@ struct mmu_context_skas {
18 uml_ldt_t ldt; 18 uml_ldt_t ldt;
19}; 19};
20 20
21extern void switch_mm_skas(struct mm_id * mm_idp); 21extern void __switch_mm(struct mm_id * mm_idp);
22 22
23#endif 23#endif
diff --git a/arch/um/include/skas/mode_kern_skas.h b/arch/um/include/skas/mode_kern_skas.h
deleted file mode 100644
index c29485109a9a..000000000000
--- a/arch/um/include/skas/mode_kern_skas.h
+++ /dev/null
@@ -1,42 +0,0 @@
1/*
2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
3 * Licensed under the GPL
4 */
5
6#ifndef __SKAS_MODE_KERN_H__
7#define __SKAS_MODE_KERN_H__
8
9#include "linux/sched.h"
10#include "asm/page.h"
11#include "asm/ptrace.h"
12#include "mem_user.h"
13
14extern void flush_thread_skas(void);
15extern void switch_to_skas(void *prev, void *next);
16extern void start_thread_skas(struct pt_regs *regs, unsigned long eip,
17 unsigned long esp);
18extern int copy_thread_skas(int nr, unsigned long clone_flags,
19 unsigned long sp, unsigned long stack_top,
20 struct task_struct *p, struct pt_regs *regs);
21extern void release_thread_skas(struct task_struct *task);
22extern void init_idle_skas(void);
23extern void flush_tlb_kernel_range_skas(unsigned long start,
24 unsigned long end);
25extern void flush_tlb_kernel_vm_skas(void);
26extern void __flush_tlb_one_skas(unsigned long addr);
27extern void flush_tlb_range_skas(struct vm_area_struct *vma,
28 unsigned long start, unsigned long end);
29extern void flush_tlb_mm_skas(struct mm_struct *mm);
30extern void force_flush_all_skas(void);
31extern long execute_syscall_skas(void *r);
32extern void before_mem_skas(unsigned long unused);
33extern unsigned long set_task_sizes_skas(unsigned long *task_size_out);
34extern int start_uml_skas(void);
35extern int external_pid_skas(struct task_struct *task);
36extern int thread_pid_skas(struct task_struct *task);
37extern void flush_tlb_page_skas(struct vm_area_struct *vma,
38 unsigned long address);
39
40#define kmem_end_skas (host_task_size - 1024 * 1024)
41
42#endif
diff --git a/arch/um/include/skas/skas.h b/arch/um/include/skas/skas.h
index e88926b16072..b4a95e485929 100644
--- a/arch/um/include/skas/skas.h
+++ b/arch/um/include/skas/skas.h
@@ -15,7 +15,7 @@ extern int skas_needs_stub;
15 15
16extern int user_thread(unsigned long stack, int flags); 16extern int user_thread(unsigned long stack, int flags);
17extern void new_thread_handler(void); 17extern void new_thread_handler(void);
18extern void handle_syscall(union uml_pt_regs *regs); 18extern void handle_syscall(struct uml_pt_regs *regs);
19extern int new_mm(unsigned long stack); 19extern int new_mm(unsigned long stack);
20extern void get_skas_faultinfo(int pid, struct faultinfo * fi); 20extern void get_skas_faultinfo(int pid, struct faultinfo * fi);
21extern long execute_syscall_skas(void *r); 21extern long execute_syscall_skas(void *r);
diff --git a/arch/um/include/sysdep-i386/ptrace.h b/arch/um/include/sysdep-i386/ptrace.h
index 45573088864c..d765175d42be 100644
--- a/arch/um/include/sysdep-i386/ptrace.h
+++ b/arch/um/include/sysdep-i386/ptrace.h
@@ -52,37 +52,34 @@ extern int sysemu_supported;
52#define PTRACE_SYSEMU_SINGLESTEP 32 52#define PTRACE_SYSEMU_SINGLESTEP 32
53#endif 53#endif
54 54
55union uml_pt_regs { 55struct uml_pt_regs {
56 struct skas_regs { 56 unsigned long regs[MAX_REG_NR];
57 unsigned long regs[MAX_REG_NR]; 57 unsigned long fp[HOST_FP_SIZE];
58 unsigned long fp[HOST_FP_SIZE]; 58 unsigned long xfp[HOST_XFP_SIZE];
59 unsigned long xfp[HOST_XFP_SIZE]; 59 struct faultinfo faultinfo;
60 struct faultinfo faultinfo; 60 long syscall;
61 long syscall; 61 int is_user;
62 int is_user;
63 } skas;
64}; 62};
65 63
66#define EMPTY_UML_PT_REGS { } 64#define EMPTY_UML_PT_REGS { }
67 65
68#define UPT_SC(r) ((r)->tt.sc) 66#define UPT_IP(r) REGS_IP((r)->regs)
69#define UPT_IP(r) REGS_IP((r)->skas.regs) 67#define UPT_SP(r) REGS_SP((r)->regs)
70#define UPT_SP(r) REGS_SP((r)->skas.regs) 68#define UPT_EFLAGS(r) REGS_EFLAGS((r)->regs)
71#define UPT_EFLAGS(r) REGS_EFLAGS((r)->skas.regs) 69#define UPT_EAX(r) REGS_EAX((r)->regs)
72#define UPT_EAX(r) REGS_EAX((r)->skas.regs) 70#define UPT_EBX(r) REGS_EBX((r)->regs)
73#define UPT_EBX(r) REGS_EBX((r)->skas.regs) 71#define UPT_ECX(r) REGS_ECX((r)->regs)
74#define UPT_ECX(r) REGS_ECX((r)->skas.regs) 72#define UPT_EDX(r) REGS_EDX((r)->regs)
75#define UPT_EDX(r) REGS_EDX((r)->skas.regs) 73#define UPT_ESI(r) REGS_ESI((r)->regs)
76#define UPT_ESI(r) REGS_ESI((r)->skas.regs) 74#define UPT_EDI(r) REGS_EDI((r)->regs)
77#define UPT_EDI(r) REGS_EDI((r)->skas.regs) 75#define UPT_EBP(r) REGS_EBP((r)->regs)
78#define UPT_EBP(r) REGS_EBP((r)->skas.regs) 76#define UPT_ORIG_EAX(r) ((r)->syscall)
79#define UPT_ORIG_EAX(r) ((r)->skas.syscall) 77#define UPT_CS(r) REGS_CS((r)->regs)
80#define UPT_CS(r) REGS_CS((r)->skas.regs) 78#define UPT_SS(r) REGS_SS((r)->regs)
81#define UPT_SS(r) REGS_SS((r)->skas.regs) 79#define UPT_DS(r) REGS_DS((r)->regs)
82#define UPT_DS(r) REGS_DS((r)->skas.regs) 80#define UPT_ES(r) REGS_ES((r)->regs)
83#define UPT_ES(r) REGS_ES((r)->skas.regs) 81#define UPT_FS(r) REGS_FS((r)->regs)
84#define UPT_FS(r) REGS_FS((r)->skas.regs) 82#define UPT_GS(r) REGS_GS((r)->regs)
85#define UPT_GS(r) REGS_GS((r)->skas.regs)
86 83
87#define UPT_SYSCALL_ARG1(r) UPT_EBX(r) 84#define UPT_SYSCALL_ARG1(r) UPT_EBX(r)
88#define UPT_SYSCALL_ARG2(r) UPT_ECX(r) 85#define UPT_SYSCALL_ARG2(r) UPT_ECX(r)
@@ -93,7 +90,7 @@ union uml_pt_regs {
93 90
94extern int user_context(unsigned long sp); 91extern int user_context(unsigned long sp);
95 92
96#define UPT_IS_USER(r) ((r)->skas.is_user) 93#define UPT_IS_USER(r) ((r)->is_user)
97 94
98struct syscall_args { 95struct syscall_args {
99 unsigned long args[6]; 96 unsigned long args[6];
@@ -162,14 +159,14 @@ struct syscall_args {
162 } while (0) 159 } while (0)
163 160
164#define UPT_SET_SYSCALL_RETURN(r, res) \ 161#define UPT_SET_SYSCALL_RETURN(r, res) \
165 REGS_SET_SYSCALL_RETURN((r)->skas.regs, (res)) 162 REGS_SET_SYSCALL_RETURN((r)->regs, (res))
166 163
167#define UPT_RESTART_SYSCALL(r) REGS_RESTART_SYSCALL((r)->skas.regs) 164#define UPT_RESTART_SYSCALL(r) REGS_RESTART_SYSCALL((r)->regs)
168 165
169#define UPT_ORIG_SYSCALL(r) UPT_EAX(r) 166#define UPT_ORIG_SYSCALL(r) UPT_EAX(r)
170#define UPT_SYSCALL_NR(r) UPT_ORIG_EAX(r) 167#define UPT_SYSCALL_NR(r) UPT_ORIG_EAX(r)
171#define UPT_SYSCALL_RET(r) UPT_EAX(r) 168#define UPT_SYSCALL_RET(r) UPT_EAX(r)
172 169
173#define UPT_FAULTINFO(r) (&(r)->skas.faultinfo) 170#define UPT_FAULTINFO(r) (&(r)->faultinfo)
174 171
175#endif 172#endif
diff --git a/arch/um/include/sysdep-x86_64/ptrace.h b/arch/um/include/sysdep-x86_64/ptrace.h
index b3412b64cbea..ea4afdce59c1 100644
--- a/arch/um/include/sysdep-x86_64/ptrace.h
+++ b/arch/um/include/sysdep-x86_64/ptrace.h
@@ -84,58 +84,52 @@
84 84
85#define REGS_ERR(r) ((r)->fault_type) 85#define REGS_ERR(r) ((r)->fault_type)
86 86
87/* XXX */ 87struct uml_pt_regs {
88union uml_pt_regs { 88 unsigned long regs[MAX_REG_NR];
89 struct skas_regs { 89 unsigned long fp[HOST_FP_SIZE];
90 unsigned long regs[MAX_REG_NR]; 90 struct faultinfo faultinfo;
91 unsigned long fp[HOST_FP_SIZE]; 91 long syscall;
92 struct faultinfo faultinfo; 92 int is_user;
93 long syscall;
94 int is_user;
95 } skas;
96}; 93};
97 94
98#define EMPTY_UML_PT_REGS { } 95#define EMPTY_UML_PT_REGS { }
99 96
100#define UPT_RBX(r) REGS_RBX((r)->skas.regs) 97#define UPT_RBX(r) REGS_RBX((r)->regs)
101#define UPT_RCX(r) REGS_RCX((r)->skas.regs) 98#define UPT_RCX(r) REGS_RCX((r)->regs)
102#define UPT_RDX(r) REGS_RDX((r)->skas.regs) 99#define UPT_RDX(r) REGS_RDX((r)->regs)
103#define UPT_RSI(r) REGS_RSI((r)->skas.regs) 100#define UPT_RSI(r) REGS_RSI((r)->regs)
104#define UPT_RDI(r) REGS_RDI((r)->skas.regs) 101#define UPT_RDI(r) REGS_RDI((r)->regs)
105#define UPT_RBP(r) REGS_RBP((r)->skas.regs) 102#define UPT_RBP(r) REGS_RBP((r)->regs)
106#define UPT_RAX(r) REGS_RAX((r)->skas.regs) 103#define UPT_RAX(r) REGS_RAX((r)->regs)
107#define UPT_R8(r) REGS_R8((r)->skas.regs) 104#define UPT_R8(r) REGS_R8((r)->regs)
108#define UPT_R9(r) REGS_R9((r)->skas.regs) 105#define UPT_R9(r) REGS_R9((r)->regs)
109#define UPT_R10(r) REGS_R10((r)->skas.regs) 106#define UPT_R10(r) REGS_R10((r)->regs)
110#define UPT_R11(r) REGS_R11((r)->skas.regs) 107#define UPT_R11(r) REGS_R11((r)->regs)
111#define UPT_R12(r) REGS_R12((r)->skas.regs) 108#define UPT_R12(r) REGS_R12((r)->regs)
112#define UPT_R13(r) REGS_R13((r)->skas.regs) 109#define UPT_R13(r) REGS_R13((r)->regs)
113#define UPT_R14(r) REGS_R14((r)->skas.regs) 110#define UPT_R14(r) REGS_R14((r)->regs)
114#define UPT_R15(r) REGS_R15((r)->skas.regs) 111#define UPT_R15(r) REGS_R15((r)->regs)
115#define UPT_CS(r) REGS_CS((r)->skas.regs) 112#define UPT_CS(r) REGS_CS((r)->regs)
116#define UPT_FS_BASE(r) \ 113#define UPT_FS_BASE(r) REGS_FS_BASE((r)->regs)
117 REGS_FS_BASE((r)->skas.regs) 114#define UPT_FS(r) REGS_FS((r)->regs)
118#define UPT_FS(r) REGS_FS((r)->skas.regs) 115#define UPT_GS_BASE(r) REGS_GS_BASE((r)->regs)
119#define UPT_GS_BASE(r) \ 116#define UPT_GS(r) REGS_GS((r)->regs)
120 REGS_GS_BASE((r)->skas.regs) 117#define UPT_DS(r) REGS_DS((r)->regs)
121#define UPT_GS(r) REGS_GS((r)->skas.regs) 118#define UPT_ES(r) REGS_ES((r)->regs)
122#define UPT_DS(r) REGS_DS((r)->skas.regs) 119#define UPT_CS(r) REGS_CS((r)->regs)
123#define UPT_ES(r) REGS_ES((r)->skas.regs) 120#define UPT_SS(r) REGS_SS((r)->regs)
124#define UPT_CS(r) REGS_CS((r)->skas.regs) 121#define UPT_ORIG_RAX(r) REGS_ORIG_RAX((r)->regs)
125#define UPT_SS(r) REGS_SS((r)->skas.regs) 122
126#define UPT_ORIG_RAX(r) REGS_ORIG_RAX((r)->skas.regs) 123#define UPT_IP(r) REGS_IP((r)->regs)
127 124#define UPT_SP(r) REGS_SP((r)->regs)
128#define UPT_IP(r) REGS_IP((r)->skas.regs) 125
129#define UPT_SP(r) REGS_SP((r)->skas.regs) 126#define UPT_EFLAGS(r) REGS_EFLAGS((r)->regs)
130 127#define UPT_SYSCALL_NR(r) ((r)->syscall)
131#define UPT_EFLAGS(r) REGS_EFLAGS((r)->skas.regs)
132#define UPT_SC(r) ((r)->tt.sc)
133#define UPT_SYSCALL_NR(r) ((r)->skas.syscall)
134#define UPT_SYSCALL_RET(r) UPT_RAX(r) 128#define UPT_SYSCALL_RET(r) UPT_RAX(r)
135 129
136extern int user_context(unsigned long sp); 130extern int user_context(unsigned long sp);
137 131
138#define UPT_IS_USER(r) ((r)->skas.is_user) 132#define UPT_IS_USER(r) ((r)->is_user)
139 133
140#define UPT_SYSCALL_ARG1(r) UPT_RDI(r) 134#define UPT_SYSCALL_ARG1(r) UPT_RDI(r)
141#define UPT_SYSCALL_ARG2(r) UPT_RSI(r) 135#define UPT_SYSCALL_ARG2(r) UPT_RSI(r)
@@ -232,12 +226,12 @@ struct syscall_args {
232 }) 226 })
233 227
234#define UPT_SET_SYSCALL_RETURN(r, res) \ 228#define UPT_SET_SYSCALL_RETURN(r, res) \
235 REGS_SET_SYSCALL_RETURN((r)->skas.regs, (res)) 229 REGS_SET_SYSCALL_RETURN((r)->regs, (res))
236 230
237#define UPT_RESTART_SYSCALL(r) REGS_RESTART_SYSCALL((r)->skas.regs) 231#define UPT_RESTART_SYSCALL(r) REGS_RESTART_SYSCALL((r)->regs)
238 232
239#define UPT_SEGV_IS_FIXABLE(r) REGS_SEGV_IS_FIXABLE(&r->skas) 233#define UPT_SEGV_IS_FIXABLE(r) REGS_SEGV_IS_FIXABLE(&r->skas)
240 234
241#define UPT_FAULTINFO(r) (&(r)->skas.faultinfo) 235#define UPT_FAULTINFO(r) (&(r)->faultinfo)
242 236
243#endif 237#endif
diff --git a/arch/um/include/task.h b/arch/um/include/task.h
index 6375ba7203c9..3fe726b3cf48 100644
--- a/arch/um/include/task.h
+++ b/arch/um/include/task.h
@@ -3,7 +3,7 @@
3 3
4#include <kern_constants.h> 4#include <kern_constants.h>
5 5
6#define TASK_REGS(task) ((union uml_pt_regs *) &(((char *) (task))[HOST_TASK_REGS])) 6#define TASK_REGS(task) ((struct uml_pt_regs *) &(((char *) (task))[HOST_TASK_REGS]))
7#define TASK_PID(task) *((int *) &(((char *) (task))[HOST_TASK_PID])) 7#define TASK_PID(task) *((int *) &(((char *) (task))[HOST_TASK_PID]))
8 8
9#endif 9#endif
diff --git a/arch/um/kernel/exec.c b/arch/um/kernel/exec.c
index 8f774c25b765..5064fb691eb5 100644
--- a/arch/um/kernel/exec.c
+++ b/arch/um/kernel/exec.c
@@ -18,17 +18,31 @@
18#include "irq_user.h" 18#include "irq_user.h"
19#include "tlb.h" 19#include "tlb.h"
20#include "os.h" 20#include "os.h"
21#include "mode_kern.h" 21#include "skas/skas.h"
22 22
23void flush_thread(void) 23void flush_thread(void)
24{ 24{
25 void *data = NULL;
26 unsigned long end = proc_mm ? task_size : CONFIG_STUB_START;
27 int ret;
28
25 arch_flush_thread(&current->thread.arch); 29 arch_flush_thread(&current->thread.arch);
26 flush_thread_skas(); 30
31 ret = unmap(&current->mm->context.skas.id, 0, end, 1, &data);
32 if(ret){
33 printk("flush_thread - clearing address space failed, "
34 "err = %d\n", ret);
35 force_sig(SIGKILL, current);
36 }
37
38 __switch_mm(&current->mm->context.skas.id);
27} 39}
28 40
29void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp) 41void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp)
30{ 42{
31 start_thread_skas(regs, eip, esp); 43 set_fs(USER_DS);
44 PT_REGS_IP(regs) = eip;
45 PT_REGS_SP(regs) = esp;
32} 46}
33 47
34#ifdef CONFIG_TTY_LOG 48#ifdef CONFIG_TTY_LOG
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index ec1ed680032b..b10ee28b97cb 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -91,7 +91,7 @@ static struct irq_fd **last_irq_ptr = &active_fds;
91 91
92extern void free_irqs(void); 92extern void free_irqs(void);
93 93
94void sigio_handler(int sig, union uml_pt_regs *regs) 94void sigio_handler(int sig, struct uml_pt_regs *regs)
95{ 95{
96 struct irq_fd *irq_fd; 96 struct irq_fd *irq_fd;
97 int n; 97 int n;
@@ -344,7 +344,7 @@ int deactivate_all_fds(void)
344 * SMP cross-CPU interrupts have their own specific 344 * SMP cross-CPU interrupts have their own specific
345 * handlers). 345 * handlers).
346 */ 346 */
347unsigned int do_IRQ(int irq, union uml_pt_regs *regs) 347unsigned int do_IRQ(int irq, struct uml_pt_regs *regs)
348{ 348{
349 struct pt_regs *old_regs = set_irq_regs((struct pt_regs *)regs); 349 struct pt_regs *old_regs = set_irq_regs((struct pt_regs *)regs);
350 irq_enter(); 350 irq_enter();
diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c
index f7b2f3594793..90e89e838173 100644
--- a/arch/um/kernel/physmem.c
+++ b/arch/um/kernel/physmem.c
@@ -10,7 +10,7 @@
10#include "as-layout.h" 10#include "as-layout.h"
11#include "init.h" 11#include "init.h"
12#include "kern.h" 12#include "kern.h"
13#include "mode_kern.h" 13#include "mem_user.h"
14#include "os.h" 14#include "os.h"
15 15
16static int physmem_fd = -1; 16static int physmem_fd = -1;
@@ -61,7 +61,7 @@ static unsigned long kmem_top = 0;
61unsigned long get_kmem_end(void) 61unsigned long get_kmem_end(void)
62{ 62{
63 if (kmem_top == 0) 63 if (kmem_top == 0)
64 kmem_top = kmem_end_skas; 64 kmem_top = host_task_size - 1024 * 1024;
65 return kmem_top; 65 return kmem_top;
66} 66}
67 67
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index 22ad46fd2c08..d3b9c62e73c7 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -43,8 +43,7 @@
43#include "frame_kern.h" 43#include "frame_kern.h"
44#include "sigcontext.h" 44#include "sigcontext.h"
45#include "os.h" 45#include "os.h"
46#include "mode.h" 46#include "skas.h"
47#include "mode_kern.h"
48 47
49/* This is a per-cpu array. A processor only modifies its entry and it only 48/* This is a per-cpu array. A processor only modifies its entry and it only
50 * cares about its entry, so it's OK if another processor is modifying its 49 * cares about its entry, so it's OK if another processor is modifying its
@@ -54,7 +53,8 @@ struct cpu_task cpu_tasks[NR_CPUS] = { [0 ... NR_CPUS - 1] = { -1, NULL } };
54 53
55static inline int external_pid(struct task_struct *task) 54static inline int external_pid(struct task_struct *task)
56{ 55{
57 return external_pid_skas(task); 56 /* FIXME: Need to look up userspace_pid by cpu */
57 return(userspace_pid[0]);
58} 58}
59 59
60int pid_to_processor_id(int pid) 60int pid_to_processor_id(int pid)
@@ -104,6 +104,8 @@ static inline void set_current(struct task_struct *task)
104 { external_pid(task), task }); 104 { external_pid(task), task });
105} 105}
106 106
107extern void arch_switch_to(struct task_struct *from, struct task_struct *to);
108
107void *_switch_to(void *prev, void *next, void *last) 109void *_switch_to(void *prev, void *next, void *last)
108{ 110{
109 struct task_struct *from = prev; 111 struct task_struct *from = prev;
@@ -114,7 +116,19 @@ void *_switch_to(void *prev, void *next, void *last)
114 116
115 do { 117 do {
116 current->thread.saved_task = NULL; 118 current->thread.saved_task = NULL;
117 switch_to_skas(prev, next); 119
120 /* XXX need to check runqueues[cpu].idle */
121 if(current->pid == 0)
122 switch_timers(0);
123
124 switch_threads(&from->thread.switch_buf,
125 &to->thread.switch_buf);
126
127 arch_switch_to(current->thread.prev_sched, current);
128
129 if(current->pid == 0)
130 switch_timers(1);
131
118 if(current->thread.saved_task) 132 if(current->thread.saved_task)
119 show_regs(&(current->thread.regs)); 133 show_regs(&(current->thread.regs));
120 next= current->thread.saved_task; 134 next= current->thread.saved_task;
@@ -133,11 +147,6 @@ void interrupt_end(void)
133 do_signal(); 147 do_signal();
134} 148}
135 149
136void release_thread(struct task_struct *task)
137{
138 release_thread_skas(task);
139}
140
141void exit_thread(void) 150void exit_thread(void)
142{ 151{
143} 152}
@@ -147,27 +156,95 @@ void *get_current(void)
147 return current; 156 return current;
148} 157}
149 158
159extern void schedule_tail(struct task_struct *prev);
160
161/* This is called magically, by its address being stuffed in a jmp_buf
162 * and being longjmp-d to.
163 */
164void new_thread_handler(void)
165{
166 int (*fn)(void *), n;
167 void *arg;
168
169 if(current->thread.prev_sched != NULL)
170 schedule_tail(current->thread.prev_sched);
171 current->thread.prev_sched = NULL;
172
173 fn = current->thread.request.u.thread.proc;
174 arg = current->thread.request.u.thread.arg;
175
176 /* The return value is 1 if the kernel thread execs a process,
177 * 0 if it just exits
178 */
179 n = run_kernel_thread(fn, arg, &current->thread.exec_buf);
180 if(n == 1){
181 /* Handle any immediate reschedules or signals */
182 interrupt_end();
183 userspace(&current->thread.regs.regs);
184 }
185 else do_exit(0);
186}
187
188/* Called magically, see new_thread_handler above */
189void fork_handler(void)
190{
191 force_flush_all();
192 if(current->thread.prev_sched == NULL)
193 panic("blech");
194
195 schedule_tail(current->thread.prev_sched);
196
197 /* XXX: if interrupt_end() calls schedule, this call to
198 * arch_switch_to isn't needed. We could want to apply this to
199 * improve performance. -bb */
200 arch_switch_to(current->thread.prev_sched, current);
201
202 current->thread.prev_sched = NULL;
203
204 /* Handle any immediate reschedules or signals */
205 interrupt_end();
206
207 userspace(&current->thread.regs.regs);
208}
209
150int copy_thread(int nr, unsigned long clone_flags, unsigned long sp, 210int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
151 unsigned long stack_top, struct task_struct * p, 211 unsigned long stack_top, struct task_struct * p,
152 struct pt_regs *regs) 212 struct pt_regs *regs)
153{ 213{
154 int ret; 214 void (*handler)(void);
215 int ret = 0;
155 216
156 p->thread = (struct thread_struct) INIT_THREAD; 217 p->thread = (struct thread_struct) INIT_THREAD;
157 ret = copy_thread_skas(nr, clone_flags, sp, stack_top, p, regs);
158 218
159 if (ret || !current->thread.forking) 219 if(current->thread.forking){
160 goto out; 220 memcpy(&p->thread.regs.regs, &regs->regs,
221 sizeof(p->thread.regs.regs));
222 REGS_SET_SYSCALL_RETURN(p->thread.regs.regs.regs, 0);
223 if(sp != 0)
224 REGS_SP(p->thread.regs.regs.regs) = sp;
161 225
162 clear_flushed_tls(p); 226 handler = fork_handler;
163 227
164 /* 228 arch_copy_thread(&current->thread.arch, &p->thread.arch);
165 * Set a new TLS for the child thread? 229 }
166 */ 230 else {
167 if (clone_flags & CLONE_SETTLS) 231 init_thread_registers(&p->thread.regs.regs);
168 ret = arch_copy_tls(p); 232 p->thread.request.u.thread = current->thread.request.u.thread;
233 handler = new_thread_handler;
234 }
235
236 new_thread(task_stack_page(p), &p->thread.switch_buf, handler);
237
238 if (current->thread.forking) {
239 clear_flushed_tls(p);
240
241 /*
242 * Set a new TLS for the child thread?
243 */
244 if (clone_flags & CLONE_SETTLS)
245 ret = arch_copy_tls(p);
246 }
169 247
170out:
171 return ret; 248 return ret;
172} 249}
173 250
@@ -198,7 +275,8 @@ void default_idle(void)
198 275
199void cpu_idle(void) 276void cpu_idle(void)
200{ 277{
201 init_idle_skas(); 278 cpu_tasks[current_thread->cpu].pid = os_getpid();
279 default_idle();
202} 280}
203 281
204void *um_virt_to_phys(struct task_struct *task, unsigned long addr, 282void *um_virt_to_phys(struct task_struct *task, unsigned long addr,
diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c
index 36debc0de594..bbc3a4a9a0fa 100644
--- a/arch/um/kernel/ptrace.c
+++ b/arch/um/kernel/ptrace.c
@@ -228,7 +228,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
228#ifdef PTRACE_ARCH_PRCTL 228#ifdef PTRACE_ARCH_PRCTL
229 case PTRACE_ARCH_PRCTL: 229 case PTRACE_ARCH_PRCTL:
230 /* XXX Calls ptrace on the host - needs some SMP thinking */ 230 /* XXX Calls ptrace on the host - needs some SMP thinking */
231 ret = arch_prctl_skas(child, data, (void *) addr); 231 ret = arch_prctl(child, data, (void *) addr);
232 break; 232 break;
233#endif 233#endif
234 default: 234 default:
@@ -239,7 +239,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
239 return ret; 239 return ret;
240} 240}
241 241
242void send_sigtrap(struct task_struct *tsk, union uml_pt_regs *regs, 242void send_sigtrap(struct task_struct *tsk, struct uml_pt_regs *regs,
243 int error_code) 243 int error_code)
244{ 244{
245 struct siginfo info; 245 struct siginfo info;
@@ -258,7 +258,7 @@ void send_sigtrap(struct task_struct *tsk, union uml_pt_regs *regs,
258/* XXX Check PT_DTRACE vs TIF_SINGLESTEP for singlestepping check and 258/* XXX Check PT_DTRACE vs TIF_SINGLESTEP for singlestepping check and
259 * PT_PTRACED vs TIF_SYSCALL_TRACE for syscall tracing check 259 * PT_PTRACED vs TIF_SYSCALL_TRACE for syscall tracing check
260 */ 260 */
261void syscall_trace(union uml_pt_regs *regs, int entryexit) 261void syscall_trace(struct uml_pt_regs *regs, int entryexit)
262{ 262{
263 int is_singlestep = (current->ptrace & PT_DTRACE) && entryexit; 263 int is_singlestep = (current->ptrace & PT_DTRACE) && entryexit;
264 int tracesysgood; 264 int tracesysgood;
diff --git a/arch/um/kernel/reboot.c b/arch/um/kernel/reboot.c
index 4a0def32e323..f3bd18bbf07f 100644
--- a/arch/um/kernel/reboot.c
+++ b/arch/um/kernel/reboot.c
@@ -9,13 +9,30 @@
9#include "kern_util.h" 9#include "kern_util.h"
10#include "kern.h" 10#include "kern.h"
11#include "os.h" 11#include "os.h"
12#include "mode.h" 12#include "skas.h"
13 13
14void (*pm_power_off)(void); 14void (*pm_power_off)(void);
15 15
16static void kill_off_processes(void) 16static void kill_off_processes(void)
17{ 17{
18 kill_off_processes_skas(); 18 if(proc_mm)
19 /*
20 * FIXME: need to loop over userspace_pids
21 */
22 os_kill_ptraced_process(userspace_pid[0], 1);
23 else {
24 struct task_struct *p;
25 int pid, me;
26
27 me = os_getpid();
28 for_each_process(p){
29 if(p->mm == NULL)
30 continue;
31
32 pid = p->mm->context.skas.id.u.pid;
33 os_kill_ptraced_process(pid, 1);
34 }
35 }
19} 36}
20 37
21void uml_cleanup(void) 38void uml_cleanup(void)
diff --git a/arch/um/kernel/signal.c b/arch/um/kernel/signal.c
index c4020c3d7857..4dab7e417ba9 100644
--- a/arch/um/kernel/signal.c
+++ b/arch/um/kernel/signal.c
@@ -23,7 +23,6 @@
23#include "kern.h" 23#include "kern.h"
24#include "frame_kern.h" 24#include "frame_kern.h"
25#include "sigcontext.h" 25#include "sigcontext.h"
26#include "mode.h"
27 26
28EXPORT_SYMBOL(block_signals); 27EXPORT_SYMBOL(block_signals);
29EXPORT_SYMBOL(unblock_signals); 28EXPORT_SYMBOL(unblock_signals);
diff --git a/arch/um/kernel/skas/Makefile b/arch/um/kernel/skas/Makefile
index 3e3fa7e7e3cf..b2823cdd783e 100644
--- a/arch/um/kernel/skas/Makefile
+++ b/arch/um/kernel/skas/Makefile
@@ -3,7 +3,7 @@
3# Licensed under the GPL 3# Licensed under the GPL
4# 4#
5 5
6obj-y := clone.o exec.o mem.o mmu.o process.o syscall.o tlb.o uaccess.o 6obj-y := clone.o mmu.o process.o syscall.o uaccess.o
7 7
8# clone.o is in the stub, so it can't be built with profiling 8# clone.o is in the stub, so it can't be built with profiling
9# GCC hardened also auto-enables -fpic, but we need %ebx so it can't work -> 9# GCC hardened also auto-enables -fpic, but we need %ebx so it can't work ->
diff --git a/arch/um/kernel/skas/exec.c b/arch/um/kernel/skas/exec.c
deleted file mode 100644
index 580eb6468949..000000000000
--- a/arch/um/kernel/skas/exec.c
+++ /dev/null
@@ -1,40 +0,0 @@
1/*
2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
5
6#include "linux/kernel.h"
7#include "asm/current.h"
8#include "asm/page.h"
9#include "asm/signal.h"
10#include "asm/ptrace.h"
11#include "asm/uaccess.h"
12#include "asm/mmu_context.h"
13#include "tlb.h"
14#include "skas.h"
15#include "um_mmu.h"
16#include "os.h"
17
18void flush_thread_skas(void)
19{
20 void *data = NULL;
21 unsigned long end = proc_mm ? task_size : CONFIG_STUB_START;
22 int ret;
23
24 ret = unmap(&current->mm->context.skas.id, 0, end, 1, &data);
25 if(ret){
26 printk("flush_thread_skas - clearing address space failed, "
27 "err = %d\n", ret);
28 force_sig(SIGKILL, current);
29 }
30
31 switch_mm_skas(&current->mm->context.skas.id);
32}
33
34void start_thread_skas(struct pt_regs *regs, unsigned long eip,
35 unsigned long esp)
36{
37 set_fs(USER_DS);
38 PT_REGS_IP(regs) = eip;
39 PT_REGS_SP(regs) = esp;
40}
diff --git a/arch/um/kernel/skas/mem.c b/arch/um/kernel/skas/mem.c
deleted file mode 100644
index 7c18dfcd7d8e..000000000000
--- a/arch/um/kernel/skas/mem.c
+++ /dev/null
@@ -1,22 +0,0 @@
1/*
2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
5
6#include "linux/mm.h"
7#include "asm/pgtable.h"
8#include "mem_user.h"
9#include "skas.h"
10
11unsigned long set_task_sizes_skas(unsigned long *task_size_out)
12{
13 /* Round up to the nearest 4M */
14 unsigned long host_task_size = ROUND_4M((unsigned long)
15 &host_task_size);
16
17 if (!skas_needs_stub)
18 *task_size_out = host_task_size;
19 else *task_size_out = CONFIG_STUB_START & PGDIR_MASK;
20
21 return host_task_size;
22}
diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c
index 2c6d090a2e87..902d74138952 100644
--- a/arch/um/kernel/skas/mmu.c
+++ b/arch/um/kernel/skas/mmu.c
@@ -71,7 +71,7 @@ static int init_stub_pte(struct mm_struct *mm, unsigned long proc,
71 return(-ENOMEM); 71 return(-ENOMEM);
72} 72}
73 73
74int init_new_context_skas(struct task_struct *task, struct mm_struct *mm) 74int init_new_context(struct task_struct *task, struct mm_struct *mm)
75{ 75{
76 struct mmu_context_skas *from_mm = NULL; 76 struct mmu_context_skas *from_mm = NULL;
77 struct mmu_context_skas *to_mm = &mm->context.skas; 77 struct mmu_context_skas *to_mm = &mm->context.skas;
@@ -137,7 +137,7 @@ int init_new_context_skas(struct task_struct *task, struct mm_struct *mm)
137 return ret; 137 return ret;
138} 138}
139 139
140void destroy_context_skas(struct mm_struct *mm) 140void destroy_context(struct mm_struct *mm)
141{ 141{
142 struct mmu_context_skas *mmu = &mm->context.skas; 142 struct mmu_context_skas *mmu = &mm->context.skas;
143 143
diff --git a/arch/um/kernel/skas/process.c b/arch/um/kernel/skas/process.c
index 48051a98525f..dabae62d52be 100644
--- a/arch/um/kernel/skas/process.c
+++ b/arch/um/kernel/skas/process.c
@@ -18,129 +18,22 @@
18#include "os.h" 18#include "os.h"
19#include "tlb.h" 19#include "tlb.h"
20#include "kern.h" 20#include "kern.h"
21#include "mode.h"
22#include "registers.h" 21#include "registers.h"
23 22
24void switch_to_skas(void *prev, void *next)
25{
26 struct task_struct *from, *to;
27
28 from = prev;
29 to = next;
30
31 /* XXX need to check runqueues[cpu].idle */
32 if(current->pid == 0)
33 switch_timers(0);
34
35 switch_threads(&from->thread.mode.skas.switch_buf,
36 &to->thread.mode.skas.switch_buf);
37
38 arch_switch_to_skas(current->thread.prev_sched, current);
39
40 if(current->pid == 0)
41 switch_timers(1);
42}
43
44extern void schedule_tail(struct task_struct *prev); 23extern void schedule_tail(struct task_struct *prev);
45 24
46/* This is called magically, by its address being stuffed in a jmp_buf
47 * and being longjmp-d to.
48 */
49void new_thread_handler(void)
50{
51 int (*fn)(void *), n;
52 void *arg;
53
54 if(current->thread.prev_sched != NULL)
55 schedule_tail(current->thread.prev_sched);
56 current->thread.prev_sched = NULL;
57
58 fn = current->thread.request.u.thread.proc;
59 arg = current->thread.request.u.thread.arg;
60
61 /* The return value is 1 if the kernel thread execs a process,
62 * 0 if it just exits
63 */
64 n = run_kernel_thread(fn, arg, &current->thread.exec_buf);
65 if(n == 1){
66 /* Handle any immediate reschedules or signals */
67 interrupt_end();
68 userspace(&current->thread.regs.regs);
69 }
70 else do_exit(0);
71}
72
73void release_thread_skas(struct task_struct *task)
74{
75}
76
77/* Called magically, see new_thread_handler above */
78void fork_handler(void)
79{
80 force_flush_all();
81 if(current->thread.prev_sched == NULL)
82 panic("blech");
83
84 schedule_tail(current->thread.prev_sched);
85
86 /* XXX: if interrupt_end() calls schedule, this call to
87 * arch_switch_to_skas isn't needed. We could want to apply this to
88 * improve performance. -bb */
89 arch_switch_to_skas(current->thread.prev_sched, current);
90
91 current->thread.prev_sched = NULL;
92
93/* Handle any immediate reschedules or signals */
94 interrupt_end();
95
96 userspace(&current->thread.regs.regs);
97}
98
99int copy_thread_skas(int nr, unsigned long clone_flags, unsigned long sp,
100 unsigned long stack_top, struct task_struct * p,
101 struct pt_regs *regs)
102{
103 void (*handler)(void);
104
105 if(current->thread.forking){
106 memcpy(&p->thread.regs.regs.skas, &regs->regs.skas,
107 sizeof(p->thread.regs.regs.skas));
108 REGS_SET_SYSCALL_RETURN(p->thread.regs.regs.skas.regs, 0);
109 if(sp != 0) REGS_SP(p->thread.regs.regs.skas.regs) = sp;
110
111 handler = fork_handler;
112
113 arch_copy_thread(&current->thread.arch, &p->thread.arch);
114 }
115 else {
116 init_thread_registers(&p->thread.regs.regs);
117 p->thread.request.u.thread = current->thread.request.u.thread;
118 handler = new_thread_handler;
119 }
120
121 new_thread(task_stack_page(p), &p->thread.mode.skas.switch_buf,
122 handler);
123 return(0);
124}
125
126int new_mm(unsigned long stack) 25int new_mm(unsigned long stack)
127{ 26{
128 int fd; 27 int fd;
129 28
130 fd = os_open_file("/proc/mm", of_cloexec(of_write(OPENFLAGS())), 0); 29 fd = os_open_file("/proc/mm", of_cloexec(of_write(OPENFLAGS())), 0);
131 if(fd < 0) 30 if(fd < 0)
132 return(fd); 31 return fd;
133 32
134 if(skas_needs_stub) 33 if(skas_needs_stub)
135 map_stub_pages(fd, CONFIG_STUB_CODE, CONFIG_STUB_DATA, stack); 34 map_stub_pages(fd, CONFIG_STUB_CODE, CONFIG_STUB_DATA, stack);
136 35
137 return(fd); 36 return fd;
138}
139
140void init_idle_skas(void)
141{
142 cpu_tasks[current_thread->cpu].pid = os_getpid();
143 default_idle();
144} 37}
145 38
146extern void start_kernel(void); 39extern void start_kernel(void);
@@ -158,14 +51,14 @@ static int __init start_kernel_proc(void *unused)
158 cpu_online_map = cpumask_of_cpu(0); 51 cpu_online_map = cpumask_of_cpu(0);
159#endif 52#endif
160 start_kernel(); 53 start_kernel();
161 return(0); 54 return 0;
162} 55}
163 56
164extern int userspace_pid[]; 57extern int userspace_pid[];
165 58
166extern char cpu0_irqstack[]; 59extern char cpu0_irqstack[];
167 60
168int __init start_uml_skas(void) 61int __init start_uml(void)
169{ 62{
170 stack_protections((unsigned long) &cpu0_irqstack); 63 stack_protections((unsigned long) &cpu0_irqstack);
171 set_sigstack(cpu0_irqstack, THREAD_SIZE); 64 set_sigstack(cpu0_irqstack, THREAD_SIZE);
@@ -176,49 +69,14 @@ int __init start_uml_skas(void)
176 69
177 init_task.thread.request.u.thread.proc = start_kernel_proc; 70 init_task.thread.request.u.thread.proc = start_kernel_proc;
178 init_task.thread.request.u.thread.arg = NULL; 71 init_task.thread.request.u.thread.arg = NULL;
179 return(start_idle_thread(task_stack_page(&init_task), 72 return start_idle_thread(task_stack_page(&init_task),
180 &init_task.thread.mode.skas.switch_buf)); 73 &init_task.thread.switch_buf);
181}
182
183int external_pid_skas(struct task_struct *task)
184{
185 /* FIXME: Need to look up userspace_pid by cpu */
186 return(userspace_pid[0]);
187}
188
189int thread_pid_skas(struct task_struct *task)
190{
191 /* FIXME: Need to look up userspace_pid by cpu */
192 return(userspace_pid[0]);
193}
194
195void kill_off_processes_skas(void)
196{
197 if(proc_mm)
198 /*
199 * FIXME: need to loop over userspace_pids in
200 * kill_off_processes_skas
201 */
202 os_kill_ptraced_process(userspace_pid[0], 1);
203 else {
204 struct task_struct *p;
205 int pid, me;
206
207 me = os_getpid();
208 for_each_process(p){
209 if(p->mm == NULL)
210 continue;
211
212 pid = p->mm->context.skas.id.u.pid;
213 os_kill_ptraced_process(pid, 1);
214 }
215 }
216} 74}
217 75
218unsigned long current_stub_stack(void) 76unsigned long current_stub_stack(void)
219{ 77{
220 if(current->mm == NULL) 78 if(current->mm == NULL)
221 return(0); 79 return 0;
222 80
223 return(current->mm->context.skas.id.stack); 81 return current->mm->context.skas.id.stack;
224} 82}
diff --git a/arch/um/kernel/skas/syscall.c b/arch/um/kernel/skas/syscall.c
index 0ae4eea21be4..e183da633c89 100644
--- a/arch/um/kernel/skas/syscall.c
+++ b/arch/um/kernel/skas/syscall.c
@@ -13,7 +13,7 @@
13#include "kern_util.h" 13#include "kern_util.h"
14#include "syscall.h" 14#include "syscall.h"
15 15
16void handle_syscall(union uml_pt_regs *r) 16void handle_syscall(struct uml_pt_regs *r)
17{ 17{
18 struct pt_regs *regs = container_of(r, struct pt_regs, regs); 18 struct pt_regs *regs = container_of(r, struct pt_regs, regs);
19 long result; 19 long result;
@@ -37,7 +37,7 @@ void handle_syscall(union uml_pt_regs *r)
37 result = -ENOSYS; 37 result = -ENOSYS;
38 else result = EXECUTE_SYSCALL(syscall, regs); 38 else result = EXECUTE_SYSCALL(syscall, regs);
39 39
40 REGS_SET_SYSCALL_RETURN(r->skas.regs, result); 40 REGS_SET_SYSCALL_RETURN(r->regs, result);
41 41
42 syscall_trace(r, 1); 42 syscall_trace(r, 1);
43} 43}
diff --git a/arch/um/kernel/skas/tlb.c b/arch/um/kernel/skas/tlb.c
deleted file mode 100644
index c0f0693743ba..000000000000
--- a/arch/um/kernel/skas/tlb.c
+++ /dev/null
@@ -1,164 +0,0 @@
1/*
2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Copyright 2003 PathScale, Inc.
4 * Licensed under the GPL
5 */
6
7#include "linux/stddef.h"
8#include "linux/sched.h"
9#include "linux/mm.h"
10#include "asm/page.h"
11#include "asm/pgtable.h"
12#include "asm/mmu.h"
13#include "mem_user.h"
14#include "mem.h"
15#include "skas.h"
16#include "os.h"
17#include "tlb.h"
18
19static int do_ops(union mm_context *mmu, struct host_vm_op *ops, int last,
20 int finished, void **flush)
21{
22 struct host_vm_op *op;
23 int i, ret = 0;
24
25 for(i = 0; i <= last && !ret; i++){
26 op = &ops[i];
27 switch(op->type){
28 case MMAP:
29 ret = map(&mmu->skas.id, op->u.mmap.addr,
30 op->u.mmap.len, op->u.mmap.prot,
31 op->u.mmap.fd, op->u.mmap.offset, finished,
32 flush);
33 break;
34 case MUNMAP:
35 ret = unmap(&mmu->skas.id, op->u.munmap.addr,
36 op->u.munmap.len, finished, flush);
37 break;
38 case MPROTECT:
39 ret = protect(&mmu->skas.id, op->u.mprotect.addr,
40 op->u.mprotect.len, op->u.mprotect.prot,
41 finished, flush);
42 break;
43 default:
44 printk("Unknown op type %d in do_ops\n", op->type);
45 break;
46 }
47 }
48
49 return ret;
50}
51
52extern int proc_mm;
53
54static void fix_range(struct mm_struct *mm, unsigned long start_addr,
55 unsigned long end_addr, int force)
56{
57 if(!proc_mm && (end_addr > CONFIG_STUB_START))
58 end_addr = CONFIG_STUB_START;
59
60 fix_range_common(mm, start_addr, end_addr, force, do_ops);
61}
62
63void __flush_tlb_one_skas(unsigned long addr)
64{
65 flush_tlb_kernel_range_common(addr, addr + PAGE_SIZE);
66}
67
68void flush_tlb_range_skas(struct vm_area_struct *vma, unsigned long start,
69 unsigned long end)
70{
71 if(vma->vm_mm == NULL)
72 flush_tlb_kernel_range_common(start, end);
73 else fix_range(vma->vm_mm, start, end, 0);
74}
75
76void flush_tlb_mm_skas(struct mm_struct *mm)
77{
78 unsigned long end;
79
80 /* Don't bother flushing if this address space is about to be
81 * destroyed.
82 */
83 if(atomic_read(&mm->mm_users) == 0)
84 return;
85
86 end = proc_mm ? task_size : CONFIG_STUB_START;
87 fix_range(mm, 0, end, 0);
88}
89
90void force_flush_all_skas(void)
91{
92 struct mm_struct *mm = current->mm;
93 struct vm_area_struct *vma = mm->mmap;
94
95 while(vma != NULL) {
96 fix_range(mm, vma->vm_start, vma->vm_end, 1);
97 vma = vma->vm_next;
98 }
99}
100
101void flush_tlb_page_skas(struct vm_area_struct *vma, unsigned long address)
102{
103 pgd_t *pgd;
104 pud_t *pud;
105 pmd_t *pmd;
106 pte_t *pte;
107 struct mm_struct *mm = vma->vm_mm;
108 void *flush = NULL;
109 int r, w, x, prot, err = 0;
110 struct mm_id *mm_id;
111
112 pgd = pgd_offset(mm, address);
113 if(!pgd_present(*pgd))
114 goto kill;
115
116 pud = pud_offset(pgd, address);
117 if(!pud_present(*pud))
118 goto kill;
119
120 pmd = pmd_offset(pud, address);
121 if(!pmd_present(*pmd))
122 goto kill;
123
124 pte = pte_offset_kernel(pmd, address);
125
126 r = pte_read(*pte);
127 w = pte_write(*pte);
128 x = pte_exec(*pte);
129 if (!pte_young(*pte)) {
130 r = 0;
131 w = 0;
132 } else if (!pte_dirty(*pte)) {
133 w = 0;
134 }
135
136 mm_id = &mm->context.skas.id;
137 prot = ((r ? UM_PROT_READ : 0) | (w ? UM_PROT_WRITE : 0) |
138 (x ? UM_PROT_EXEC : 0));
139 if(pte_newpage(*pte)){
140 if(pte_present(*pte)){
141 unsigned long long offset;
142 int fd;
143
144 fd = phys_mapping(pte_val(*pte) & PAGE_MASK, &offset);
145 err = map(mm_id, address, PAGE_SIZE, prot, fd, offset,
146 1, &flush);
147 }
148 else err = unmap(mm_id, address, PAGE_SIZE, 1, &flush);
149 }
150 else if(pte_newprot(*pte))
151 err = protect(mm_id, address, PAGE_SIZE, prot, 1, &flush);
152
153 if(err)
154 goto kill;
155
156 *pte = pte_mkuptodate(*pte);
157
158 return;
159
160kill:
161 printk("Failed to flush page for address 0x%lx\n", address);
162 force_sig(SIGKILL, current);
163}
164
diff --git a/arch/um/kernel/syscall.c b/arch/um/kernel/syscall.c
index 138bcb43b997..ebb29f5259a9 100644
--- a/arch/um/kernel/syscall.c
+++ b/arch/um/kernel/syscall.c
@@ -20,7 +20,6 @@
20#include "asm/uaccess.h" 20#include "asm/uaccess.h"
21#include "kern_util.h" 21#include "kern_util.h"
22#include "sysdep/syscalls.h" 22#include "sysdep/syscalls.h"
23#include "mode_kern.h"
24 23
25/* Unlocked, I don't care if this is a bit off */ 24/* Unlocked, I don't care if this is a bit off */
26int nsyscalls = 0; 25int nsyscalls = 0;
diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c
index 3571703a7cb4..90e24e2dbeaa 100644
--- a/arch/um/kernel/time.c
+++ b/arch/um/kernel/time.c
@@ -18,7 +18,6 @@
18#include "asm/param.h" 18#include "asm/param.h"
19#include "asm/current.h" 19#include "asm/current.h"
20#include "kern_util.h" 20#include "kern_util.h"
21#include "mode.h"
22#include "os.h" 21#include "os.h"
23 22
24int hz(void) 23int hz(void)
@@ -39,7 +38,7 @@ static unsigned long long prev_nsecs[NR_CPUS];
39static long long delta[NR_CPUS]; /* Deviation per interval */ 38static long long delta[NR_CPUS]; /* Deviation per interval */
40#endif 39#endif
41 40
42void timer_irq(union uml_pt_regs *regs) 41void timer_irq(struct uml_pt_regs *regs)
43{ 42{
44 unsigned long long ticks = 0; 43 unsigned long long ticks = 0;
45#ifdef CONFIG_UML_REAL_TIME_CLOCK 44#ifdef CONFIG_UML_REAL_TIME_CLOCK
@@ -175,13 +174,13 @@ int do_settimeofday(struct timespec *tv)
175 return 0; 174 return 0;
176} 175}
177 176
178void timer_handler(int sig, union uml_pt_regs *regs) 177void timer_handler(int sig, struct uml_pt_regs *regs)
179{ 178{
180 if(current_thread->cpu == 0) 179 if(current_thread->cpu == 0)
181 timer_irq(regs); 180 timer_irq(regs);
182 local_irq_disable(); 181 local_irq_disable();
183 irq_enter(); 182 irq_enter();
184 update_process_times((regs)->skas.is_user); 183 update_process_times(regs->is_user);
185 irq_exit(); 184 irq_exit();
186 local_irq_enable(); 185 local_irq_enable();
187} 186}
diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c
index 312e8ba30cd3..12b8c637527d 100644
--- a/arch/um/kernel/tlb.c
+++ b/arch/um/kernel/tlb.c
@@ -8,12 +8,12 @@
8#include "asm/pgalloc.h" 8#include "asm/pgalloc.h"
9#include "asm/pgtable.h" 9#include "asm/pgtable.h"
10#include "asm/tlbflush.h" 10#include "asm/tlbflush.h"
11#include "mode_kern.h"
12#include "as-layout.h" 11#include "as-layout.h"
13#include "tlb.h" 12#include "tlb.h"
14#include "mem.h" 13#include "mem.h"
15#include "mem_user.h" 14#include "mem_user.h"
16#include "os.h" 15#include "os.h"
16#include "skas.h"
17 17
18static int add_mmap(unsigned long virt, unsigned long phys, unsigned long len, 18static int add_mmap(unsigned long virt, unsigned long phys, unsigned long len,
19 unsigned int prot, struct host_vm_op *ops, int *index, 19 unsigned int prot, struct host_vm_op *ops, int *index,
@@ -341,6 +341,71 @@ int flush_tlb_kernel_range_common(unsigned long start, unsigned long end)
341 return(updated); 341 return(updated);
342} 342}
343 343
344void flush_tlb_page(struct vm_area_struct *vma, unsigned long address)
345{
346 pgd_t *pgd;
347 pud_t *pud;
348 pmd_t *pmd;
349 pte_t *pte;
350 struct mm_struct *mm = vma->vm_mm;
351 void *flush = NULL;
352 int r, w, x, prot, err = 0;
353 struct mm_id *mm_id;
354
355 address &= PAGE_MASK;
356 pgd = pgd_offset(mm, address);
357 if(!pgd_present(*pgd))
358 goto kill;
359
360 pud = pud_offset(pgd, address);
361 if(!pud_present(*pud))
362 goto kill;
363
364 pmd = pmd_offset(pud, address);
365 if(!pmd_present(*pmd))
366 goto kill;
367
368 pte = pte_offset_kernel(pmd, address);
369
370 r = pte_read(*pte);
371 w = pte_write(*pte);
372 x = pte_exec(*pte);
373 if (!pte_young(*pte)) {
374 r = 0;
375 w = 0;
376 } else if (!pte_dirty(*pte)) {
377 w = 0;
378 }
379
380 mm_id = &mm->context.skas.id;
381 prot = ((r ? UM_PROT_READ : 0) | (w ? UM_PROT_WRITE : 0) |
382 (x ? UM_PROT_EXEC : 0));
383 if(pte_newpage(*pte)){
384 if(pte_present(*pte)){
385 unsigned long long offset;
386 int fd;
387
388 fd = phys_mapping(pte_val(*pte) & PAGE_MASK, &offset);
389 err = map(mm_id, address, PAGE_SIZE, prot, fd, offset,
390 1, &flush);
391 }
392 else err = unmap(mm_id, address, PAGE_SIZE, 1, &flush);
393 }
394 else if(pte_newprot(*pte))
395 err = protect(mm_id, address, PAGE_SIZE, prot, 1, &flush);
396
397 if(err)
398 goto kill;
399
400 *pte = pte_mkuptodate(*pte);
401
402 return;
403
404kill:
405 printk("Failed to flush page for address 0x%lx\n", address);
406 force_sig(SIGKILL, current);
407}
408
344pgd_t *pgd_offset_proc(struct mm_struct *mm, unsigned long address) 409pgd_t *pgd_offset_proc(struct mm_struct *mm, unsigned long address)
345{ 410{
346 return(pgd_offset(mm, address)); 411 return(pgd_offset(mm, address));
@@ -387,21 +452,80 @@ void flush_tlb_kernel_vm(void)
387 452
388void __flush_tlb_one(unsigned long addr) 453void __flush_tlb_one(unsigned long addr)
389{ 454{
390 __flush_tlb_one_skas(addr); 455 flush_tlb_kernel_range_common(addr, addr + PAGE_SIZE);
456}
457
458static int do_ops(union mm_context *mmu, struct host_vm_op *ops, int last,
459 int finished, void **flush)
460{
461 struct host_vm_op *op;
462 int i, ret = 0;
463
464 for(i = 0; i <= last && !ret; i++){
465 op = &ops[i];
466 switch(op->type){
467 case MMAP:
468 ret = map(&mmu->skas.id, op->u.mmap.addr,
469 op->u.mmap.len, op->u.mmap.prot,
470 op->u.mmap.fd, op->u.mmap.offset, finished,
471 flush);
472 break;
473 case MUNMAP:
474 ret = unmap(&mmu->skas.id, op->u.munmap.addr,
475 op->u.munmap.len, finished, flush);
476 break;
477 case MPROTECT:
478 ret = protect(&mmu->skas.id, op->u.mprotect.addr,
479 op->u.mprotect.len, op->u.mprotect.prot,
480 finished, flush);
481 break;
482 default:
483 printk("Unknown op type %d in do_ops\n", op->type);
484 break;
485 }
486 }
487
488 return ret;
489}
490
491static void fix_range(struct mm_struct *mm, unsigned long start_addr,
492 unsigned long end_addr, int force)
493{
494 if(!proc_mm && (end_addr > CONFIG_STUB_START))
495 end_addr = CONFIG_STUB_START;
496
497 fix_range_common(mm, start_addr, end_addr, force, do_ops);
391} 498}
392 499
393void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, 500void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
394 unsigned long end) 501 unsigned long end)
395{ 502{
396 flush_tlb_range_skas(vma, start, end); 503 if(vma->vm_mm == NULL)
504 flush_tlb_kernel_range_common(start, end);
505 else fix_range(vma->vm_mm, start, end, 0);
397} 506}
398 507
399void flush_tlb_mm(struct mm_struct *mm) 508void flush_tlb_mm(struct mm_struct *mm)
400{ 509{
401 flush_tlb_mm_skas(mm); 510 unsigned long end;
511
512 /* Don't bother flushing if this address space is about to be
513 * destroyed.
514 */
515 if(atomic_read(&mm->mm_users) == 0)
516 return;
517
518 end = proc_mm ? task_size : CONFIG_STUB_START;
519 fix_range(mm, 0, end, 0);
402} 520}
403 521
404void force_flush_all(void) 522void force_flush_all(void)
405{ 523{
406 force_flush_all_skas(); 524 struct mm_struct *mm = current->mm;
525 struct vm_area_struct *vma = mm->mmap;
526
527 while(vma != NULL) {
528 fix_range(mm, vma->vm_start, vma->vm_end, 1);
529 vma = vma->vm_next;
530 }
407} 531}
diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c
index 4b472ca53485..eac63fb6183c 100644
--- a/arch/um/kernel/trap.c
+++ b/arch/um/kernel/trap.c
@@ -128,7 +128,7 @@ static void bad_segv(struct faultinfo fi, unsigned long ip)
128 force_sig_info(SIGSEGV, &si, current); 128 force_sig_info(SIGSEGV, &si, current);
129} 129}
130 130
131static void segv_handler(int sig, union uml_pt_regs *regs) 131static void segv_handler(int sig, struct uml_pt_regs *regs)
132{ 132{
133 struct faultinfo * fi = UPT_FAULTINFO(regs); 133 struct faultinfo * fi = UPT_FAULTINFO(regs);
134 134
@@ -146,7 +146,7 @@ static void segv_handler(int sig, union uml_pt_regs *regs)
146 * give us bad data! 146 * give us bad data!
147 */ 147 */
148unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user, 148unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user,
149 union uml_pt_regs *regs) 149 struct uml_pt_regs *regs)
150{ 150{
151 struct siginfo si; 151 struct siginfo si;
152 void *catcher; 152 void *catcher;
@@ -214,7 +214,7 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user,
214 return 0; 214 return 0;
215} 215}
216 216
217void relay_signal(int sig, union uml_pt_regs *regs) 217void relay_signal(int sig, struct uml_pt_regs *regs)
218{ 218{
219 if (arch_handle_signal(sig, regs)) 219 if (arch_handle_signal(sig, regs))
220 return; 220 return;
@@ -230,14 +230,14 @@ void relay_signal(int sig, union uml_pt_regs *regs)
230 force_sig(sig, current); 230 force_sig(sig, current);
231} 231}
232 232
233static void bus_handler(int sig, union uml_pt_regs *regs) 233static void bus_handler(int sig, struct uml_pt_regs *regs)
234{ 234{
235 if (current->thread.fault_catcher != NULL) 235 if (current->thread.fault_catcher != NULL)
236 do_longjmp(current->thread.fault_catcher, 1); 236 do_longjmp(current->thread.fault_catcher, 1);
237 else relay_signal(sig, regs); 237 else relay_signal(sig, regs);
238} 238}
239 239
240static void winch(int sig, union uml_pt_regs *regs) 240static void winch(int sig, struct uml_pt_regs *regs)
241{ 241{
242 do_IRQ(WINCH_IRQ, regs); 242 do_IRQ(WINCH_IRQ, regs);
243} 243}
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index 9f3a207eb81f..5f3e13c365e5 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -35,8 +35,6 @@
35#include "initrd.h" 35#include "initrd.h"
36#include "init.h" 36#include "init.h"
37#include "os.h" 37#include "os.h"
38#include "mode_kern.h"
39#include "mode.h"
40#include "skas.h" 38#include "skas.h"
41 39
42#define DEFAULT_COMMAND_LINE "root=98:0" 40#define DEFAULT_COMMAND_LINE "root=98:0"
@@ -67,7 +65,8 @@ struct cpuinfo_um boot_cpu_data = {
67 65
68unsigned long thread_saved_pc(struct task_struct *task) 66unsigned long thread_saved_pc(struct task_struct *task)
69{ 67{
70 return os_process_pc(thread_pid_skas(task)); 68 /* FIXME: Need to look up userspace_pid by cpu */
69 return os_process_pc(userspace_pid[0]);
71} 70}
72 71
73/* Changed in setup_arch, which is called in early boot */ 72/* Changed in setup_arch, which is called in early boot */
@@ -253,6 +252,19 @@ EXPORT_SYMBOL(end_iomem);
253 252
254extern char __binary_start; 253extern char __binary_start;
255 254
255static unsigned long set_task_sizes_skas(unsigned long *task_size_out)
256{
257 /* Round up to the nearest 4M */
258 unsigned long host_task_size = ROUND_4M((unsigned long)
259 &host_task_size);
260
261 if (!skas_needs_stub)
262 *task_size_out = host_task_size;
263 else *task_size_out = CONFIG_STUB_START & PGDIR_MASK;
264
265 return host_task_size;
266}
267
256int __init linux_main(int argc, char **argv) 268int __init linux_main(int argc, char **argv)
257{ 269{
258 unsigned long avail, diff; 270 unsigned long avail, diff;
@@ -289,7 +301,7 @@ int __init linux_main(int argc, char **argv)
289 os_fill_handlinfo(handlinfo_kern); 301 os_fill_handlinfo(handlinfo_kern);
290 302
291 brk_start = (unsigned long) sbrk(0); 303 brk_start = (unsigned long) sbrk(0);
292 before_mem_skas(brk_start); 304
293 /* Increase physical memory size for exec-shield users 305 /* Increase physical memory size for exec-shield users
294 so they actually get what they asked for. This should 306 so they actually get what they asked for. This should
295 add zero for non-exec shield users */ 307 add zero for non-exec shield users */
@@ -354,7 +366,7 @@ int __init linux_main(int argc, char **argv)
354 stack_protections((unsigned long) &init_thread_info); 366 stack_protections((unsigned long) &init_thread_info);
355 os_flush_stdout(); 367 os_flush_stdout();
356 368
357 return start_uml_skas(); 369 return start_uml();
358} 370}
359 371
360extern int uml_exitcode; 372extern int uml_exitcode;
diff --git a/arch/um/os-Linux/aio.c b/arch/um/os-Linux/aio.c
index c8f5b7a2c1c6..11c2b01a92bd 100644
--- a/arch/um/os-Linux/aio.c
+++ b/arch/um/os-Linux/aio.c
@@ -13,7 +13,6 @@
13#include "aio.h" 13#include "aio.h"
14#include "init.h" 14#include "init.h"
15#include "user.h" 15#include "user.h"
16#include "mode.h"
17#include "kern_constants.h" 16#include "kern_constants.h"
18 17
19struct aio_thread_req { 18struct aio_thread_req {
diff --git a/arch/um/os-Linux/main.c b/arch/um/os-Linux/main.c
index bfabb883daae..aeeecc634733 100644
--- a/arch/um/os-Linux/main.c
+++ b/arch/um/os-Linux/main.c
@@ -18,7 +18,6 @@
18#include "irq_user.h" 18#include "irq_user.h"
19#include "user.h" 19#include "user.h"
20#include "init.h" 20#include "init.h"
21#include "mode.h"
22#include "uml-config.h" 21#include "uml-config.h"
23#include "os.h" 22#include "os.h"
24#include "um_malloc.h" 23#include "um_malloc.h"
diff --git a/arch/um/os-Linux/process.c b/arch/um/os-Linux/process.c
index d5fef4ce0112..a955e9bcd04d 100644
--- a/arch/um/os-Linux/process.c
+++ b/arch/um/os-Linux/process.c
@@ -244,9 +244,6 @@ void init_new_thread_signals(void)
244 SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1); 244 SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
245 set_handler(SIGBUS, (__sighandler_t) sig_handler, SA_ONSTACK, 245 set_handler(SIGBUS, (__sighandler_t) sig_handler, SA_ONSTACK,
246 SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1); 246 SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
247 set_handler(SIGUSR2, (__sighandler_t) sig_handler,
248 SA_ONSTACK, SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM,
249 -1);
250 signal(SIGHUP, SIG_IGN); 247 signal(SIGHUP, SIG_IGN);
251 248
252 init_irq_signals(1); 249 init_irq_signals(1);
diff --git a/arch/um/os-Linux/registers.c b/arch/um/os-Linux/registers.c
index 9dc3fad9ea29..ce0b791160e6 100644
--- a/arch/um/os-Linux/registers.c
+++ b/arch/um/os-Linux/registers.c
@@ -13,26 +13,26 @@
13 13
14static unsigned long exec_regs[MAX_REG_NR]; 14static unsigned long exec_regs[MAX_REG_NR];
15 15
16void init_thread_registers(union uml_pt_regs *to) 16void init_thread_registers(struct uml_pt_regs *to)
17{ 17{
18 memcpy(to->skas.regs, exec_regs, sizeof(to->skas.regs)); 18 memcpy(to->regs, exec_regs, sizeof(to->regs));
19} 19}
20 20
21void save_registers(int pid, union uml_pt_regs *regs) 21void save_registers(int pid, struct uml_pt_regs *regs)
22{ 22{
23 int err; 23 int err;
24 24
25 err = ptrace(PTRACE_GETREGS, pid, 0, regs->skas.regs); 25 err = ptrace(PTRACE_GETREGS, pid, 0, regs->regs);
26 if(err < 0) 26 if(err < 0)
27 panic("save_registers - saving registers failed, errno = %d\n", 27 panic("save_registers - saving registers failed, errno = %d\n",
28 errno); 28 errno);
29} 29}
30 30
31void restore_registers(int pid, union uml_pt_regs *regs) 31void restore_registers(int pid, struct uml_pt_regs *regs)
32{ 32{
33 int err; 33 int err;
34 34
35 err = ptrace(PTRACE_SETREGS, pid, 0, regs->skas.regs); 35 err = ptrace(PTRACE_SETREGS, pid, 0, regs->regs);
36 if(err < 0) 36 if(err < 0)
37 panic("restore_registers - saving registers failed, " 37 panic("restore_registers - saving registers failed, "
38 "errno = %d\n", errno); 38 "errno = %d\n", errno);
diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c
index 0d6122adb8a7..583424b9797d 100644
--- a/arch/um/os-Linux/signal.c
+++ b/arch/um/os-Linux/signal.c
@@ -16,7 +16,6 @@
16#include "sysdep/sigcontext.h" 16#include "sysdep/sigcontext.h"
17#include "sysdep/barrier.h" 17#include "sysdep/barrier.h"
18#include "sigcontext.h" 18#include "sigcontext.h"
19#include "mode.h"
20#include "os.h" 19#include "os.h"
21 20
22/* These are the asynchronous signals. SIGVTALRM and SIGARLM are handled 21/* These are the asynchronous signals. SIGVTALRM and SIGARLM are handled
@@ -60,14 +59,14 @@ void sig_handler(int sig, struct sigcontext *sc)
60 59
61static void real_alarm_handler(int sig, struct sigcontext *sc) 60static void real_alarm_handler(int sig, struct sigcontext *sc)
62{ 61{
63 union uml_pt_regs regs; 62 struct uml_pt_regs regs;
64 63
65 if(sig == SIGALRM) 64 if(sig == SIGALRM)
66 switch_timers(0); 65 switch_timers(0);
67 66
68 if(sc != NULL) 67 if(sc != NULL)
69 copy_sc(&regs, sc); 68 copy_sc(&regs, sc);
70 regs.skas.is_user = 0; 69 regs.is_user = 0;
71 unblock_signals(); 70 unblock_signals();
72 timer_handler(sig, &regs); 71 timer_handler(sig, &regs);
73 72
diff --git a/arch/um/os-Linux/skas/mem.c b/arch/um/os-Linux/skas/mem.c
index 383052baa166..ae7685710c46 100644
--- a/arch/um/os-Linux/skas/mem.c
+++ b/arch/um/os-Linux/skas/mem.c
@@ -294,7 +294,3 @@ int protect(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
294 294
295 return ret; 295 return ret;
296} 296}
297
298void before_mem_skas(unsigned long unused)
299{
300}
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index db020d21f132..eb027673f357 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -131,19 +131,19 @@ void get_skas_faultinfo(int pid, struct faultinfo * fi)
131 } 131 }
132} 132}
133 133
134static void handle_segv(int pid, union uml_pt_regs * regs) 134static void handle_segv(int pid, struct uml_pt_regs * regs)
135{ 135{
136 get_skas_faultinfo(pid, &regs->skas.faultinfo); 136 get_skas_faultinfo(pid, &regs->faultinfo);
137 segv(regs->skas.faultinfo, 0, 1, NULL); 137 segv(regs->faultinfo, 0, 1, NULL);
138} 138}
139 139
140/*To use the same value of using_sysemu as the caller, ask it that value (in local_using_sysemu)*/ 140/*To use the same value of using_sysemu as the caller, ask it that value (in local_using_sysemu)*/
141static void handle_trap(int pid, union uml_pt_regs *regs, int local_using_sysemu) 141static void handle_trap(int pid, struct uml_pt_regs *regs, int local_using_sysemu)
142{ 142{
143 int err, status; 143 int err, status;
144 144
145 /* Mark this as a syscall */ 145 /* Mark this as a syscall */
146 UPT_SYSCALL_NR(regs) = PT_SYSCALL_NR(regs->skas.regs); 146 UPT_SYSCALL_NR(regs) = PT_SYSCALL_NR(regs->regs);
147 147
148 if (!local_using_sysemu) 148 if (!local_using_sysemu)
149 { 149 {
@@ -286,7 +286,7 @@ int start_userspace(unsigned long stub_stack)
286 return(pid); 286 return(pid);
287} 287}
288 288
289void userspace(union uml_pt_regs *regs) 289void userspace(struct uml_pt_regs *regs)
290{ 290{
291 int err, status, op, pid = userspace_pid[0]; 291 int err, status, op, pid = userspace_pid[0];
292 /* To prevent races if using_sysemu changes under us.*/ 292 /* To prevent races if using_sysemu changes under us.*/
@@ -312,7 +312,7 @@ void userspace(union uml_pt_regs *regs)
312 panic("userspace - waitpid failed, errno = %d\n", 312 panic("userspace - waitpid failed, errno = %d\n",
313 errno); 313 errno);
314 314
315 regs->skas.is_user = 1; 315 regs->is_user = 1;
316 save_registers(pid, regs); 316 save_registers(pid, regs);
317 UPT_SYSCALL_NR(regs) = -1; /* Assume: It's not a syscall */ 317 UPT_SYSCALL_NR(regs) = -1; /* Assume: It's not a syscall */
318 318
@@ -321,7 +321,7 @@ void userspace(union uml_pt_regs *regs)
321 switch(sig){ 321 switch(sig){
322 case SIGSEGV: 322 case SIGSEGV:
323 if(PTRACE_FULL_FAULTINFO || !ptrace_faultinfo){ 323 if(PTRACE_FULL_FAULTINFO || !ptrace_faultinfo){
324 get_skas_faultinfo(pid, &regs->skas.faultinfo); 324 get_skas_faultinfo(pid, &regs->faultinfo);
325 (*sig_info[SIGSEGV])(SIGSEGV, regs); 325 (*sig_info[SIGSEGV])(SIGSEGV, regs);
326 } 326 }
327 else handle_segv(pid, regs); 327 else handle_segv(pid, regs);
@@ -351,7 +351,7 @@ void userspace(union uml_pt_regs *regs)
351 351
352 /* Avoid -ERESTARTSYS handling in host */ 352 /* Avoid -ERESTARTSYS handling in host */
353 if(PT_SYSCALL_NR_OFFSET != PT_SYSCALL_RET_OFFSET) 353 if(PT_SYSCALL_NR_OFFSET != PT_SYSCALL_RET_OFFSET)
354 PT_SYSCALL_NR(regs->skas.regs) = -1; 354 PT_SYSCALL_NR(regs->regs) = -1;
355 } 355 }
356 } 356 }
357} 357}
@@ -578,16 +578,16 @@ void reboot_skas(void)
578 UML_LONGJMP(&initial_jmpbuf, INIT_JMP_REBOOT); 578 UML_LONGJMP(&initial_jmpbuf, INIT_JMP_REBOOT);
579} 579}
580 580
581void switch_mm_skas(struct mm_id *mm_idp) 581void __switch_mm(struct mm_id *mm_idp)
582{ 582{
583 int err; 583 int err;
584 584
585 /* FIXME: need cpu pid in switch_mm_skas */ 585 /* FIXME: need cpu pid in __switch_mm */
586 if(proc_mm){ 586 if(proc_mm){
587 err = ptrace(PTRACE_SWITCH_MM, userspace_pid[0], 0, 587 err = ptrace(PTRACE_SWITCH_MM, userspace_pid[0], 0,
588 mm_idp->u.mm_fd); 588 mm_idp->u.mm_fd);
589 if(err) 589 if(err)
590 panic("switch_mm_skas - PTRACE_SWITCH_MM failed, " 590 panic("__switch_mm - PTRACE_SWITCH_MM failed, "
591 "errno = %d\n", errno); 591 "errno = %d\n", errno);
592 } 592 }
593 else userspace_pid[0] = mm_idp->u.pid; 593 else userspace_pid[0] = mm_idp->u.pid;
diff --git a/arch/um/os-Linux/skas/trap.c b/arch/um/os-Linux/skas/trap.c
index 3b600c2e63b8..d43e470227de 100644
--- a/arch/um/os-Linux/skas/trap.c
+++ b/arch/um/os-Linux/skas/trap.c
@@ -15,13 +15,13 @@
15#include "sysdep/ptrace_user.h" 15#include "sysdep/ptrace_user.h"
16#include "os.h" 16#include "os.h"
17 17
18static union uml_pt_regs ksig_regs[UM_NR_CPUS]; 18static struct uml_pt_regs ksig_regs[UM_NR_CPUS];
19 19
20void sig_handler_common_skas(int sig, void *sc_ptr) 20void sig_handler_common_skas(int sig, void *sc_ptr)
21{ 21{
22 struct sigcontext *sc = sc_ptr; 22 struct sigcontext *sc = sc_ptr;
23 union uml_pt_regs *r; 23 struct uml_pt_regs *r;
24 void (*handler)(int, union uml_pt_regs *); 24 void (*handler)(int, struct uml_pt_regs *);
25 int save_user, save_errno = errno; 25 int save_user, save_errno = errno;
26 26
27 /* This is done because to allow SIGSEGV to be delivered inside a SEGV 27 /* This is done because to allow SIGSEGV to be delivered inside a SEGV
@@ -42,12 +42,12 @@ void sig_handler_common_skas(int sig, void *sc_ptr)
42 } 42 }
43 else r = TASK_REGS(get_current()); 43 else r = TASK_REGS(get_current());
44 44
45 save_user = r->skas.is_user; 45 save_user = r->is_user;
46 r->skas.is_user = 0; 46 r->is_user = 0;
47 if ( sig == SIGFPE || sig == SIGSEGV || 47 if ( sig == SIGFPE || sig == SIGSEGV ||
48 sig == SIGBUS || sig == SIGILL || 48 sig == SIGBUS || sig == SIGILL ||
49 sig == SIGTRAP ) { 49 sig == SIGTRAP ) {
50 GET_FAULTINFO_FROM_SC(r->skas.faultinfo, sc); 50 GET_FAULTINFO_FROM_SC(r->faultinfo, sc);
51 } 51 }
52 52
53 change_sig(SIGUSR1, 1); 53 change_sig(SIGUSR1, 1);
@@ -62,5 +62,5 @@ void sig_handler_common_skas(int sig, void *sc_ptr)
62 handler(sig, r); 62 handler(sig, r);
63 63
64 errno = save_errno; 64 errno = save_errno;
65 r->skas.is_user = save_user; 65 r->is_user = save_user;
66} 66}
diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c
index da5c90df5c9e..abfc094c3c49 100644
--- a/arch/um/os-Linux/start_up.c
+++ b/arch/um/os-Linux/start_up.c
@@ -31,7 +31,6 @@
31#include "init.h" 31#include "init.h"
32#include "os.h" 32#include "os.h"
33#include "uml-config.h" 33#include "uml-config.h"
34#include "mode.h"
35#include "tempfile.h" 34#include "tempfile.h"
36#include "kern_constants.h" 35#include "kern_constants.h"
37#include "skas.h" 36#include "skas.h"
diff --git a/arch/um/os-Linux/trap.c b/arch/um/os-Linux/trap.c
index b17f546c3655..e87fb5362f44 100644
--- a/arch/um/os-Linux/trap.c
+++ b/arch/um/os-Linux/trap.c
@@ -7,15 +7,10 @@
7#include <signal.h> 7#include <signal.h>
8#include "kern_util.h" 8#include "kern_util.h"
9#include "os.h" 9#include "os.h"
10#include "mode.h"
11#include "longjmp.h" 10#include "longjmp.h"
12 11
13void usr2_handler(int sig, union uml_pt_regs *regs)
14{
15}
16
17/* Initialized from linux_main() */ 12/* Initialized from linux_main() */
18void (*sig_info[NSIG])(int, union uml_pt_regs *); 13void (*sig_info[NSIG])(int, struct uml_pt_regs *);
19 14
20void os_fill_handlinfo(struct kern_handlers h) 15void os_fill_handlinfo(struct kern_handlers h)
21{ 16{
@@ -28,7 +23,6 @@ void os_fill_handlinfo(struct kern_handlers h)
28 sig_info[SIGIO] = h.sigio_handler; 23 sig_info[SIGIO] = h.sigio_handler;
29 sig_info[SIGVTALRM] = h.timer_handler; 24 sig_info[SIGVTALRM] = h.timer_handler;
30 sig_info[SIGALRM] = h.timer_handler; 25 sig_info[SIGALRM] = h.timer_handler;
31 sig_info[SIGUSR2] = usr2_handler;
32} 26}
33 27
34void do_longjmp(void *b, int val) 28void do_longjmp(void *b, int val)
diff --git a/arch/um/os-Linux/umid.c b/arch/um/os-Linux/umid.c
index b462863f7172..e36541e5ec00 100644
--- a/arch/um/os-Linux/umid.c
+++ b/arch/um/os-Linux/umid.c
@@ -11,7 +11,6 @@
11#include "init.h" 11#include "init.h"
12#include "os.h" 12#include "os.h"
13#include "user.h" 13#include "user.h"
14#include "mode.h"
15 14
16#define UML_DIR "~/.uml/" 15#define UML_DIR "~/.uml/"
17 16
diff --git a/arch/um/sys-i386/bugs.c b/arch/um/sys-i386/bugs.c
index 0393e44813e7..25c1165d8093 100644
--- a/arch/um/sys-i386/bugs.c
+++ b/arch/um/sys-i386/bugs.c
@@ -162,7 +162,7 @@ void arch_check_bugs(void)
162 host_has_xmm = have_it; 162 host_has_xmm = have_it;
163} 163}
164 164
165int arch_handle_signal(int sig, union uml_pt_regs *regs) 165int arch_handle_signal(int sig, struct uml_pt_regs *regs)
166{ 166{
167 unsigned char tmp[2]; 167 unsigned char tmp[2];
168 168
diff --git a/arch/um/sys-i386/fault.c b/arch/um/sys-i386/fault.c
index 745b4fd49e9f..cc06a5737df0 100644
--- a/arch/um/sys-i386/fault.c
+++ b/arch/um/sys-i386/fault.c
@@ -15,7 +15,7 @@ struct exception_table_entry
15const struct exception_table_entry *search_exception_tables(unsigned long add); 15const struct exception_table_entry *search_exception_tables(unsigned long add);
16 16
17/* Compare this to arch/i386/mm/extable.c:fixup_exception() */ 17/* Compare this to arch/i386/mm/extable.c:fixup_exception() */
18int arch_fixup(unsigned long address, union uml_pt_regs *regs) 18int arch_fixup(unsigned long address, struct uml_pt_regs *regs)
19{ 19{
20 const struct exception_table_entry *fixup; 20 const struct exception_table_entry *fixup;
21 21
diff --git a/arch/um/sys-i386/ldt.c b/arch/um/sys-i386/ldt.c
index 2683d302395d..906c2a4e7279 100644
--- a/arch/um/sys-i386/ldt.c
+++ b/arch/um/sys-i386/ldt.c
@@ -13,7 +13,6 @@
13#include "asm/ldt.h" 13#include "asm/ldt.h"
14#include "asm/unistd.h" 14#include "asm/unistd.h"
15#include "kern.h" 15#include "kern.h"
16#include "mode_kern.h"
17#include "os.h" 16#include "os.h"
18 17
19extern int modify_ldt(int func, void *ptr, unsigned long bytecount); 18extern int modify_ldt(int func, void *ptr, unsigned long bytecount);
@@ -33,7 +32,7 @@ long write_ldt_entry(struct mm_id * mm_idp, int func, struct user_desc * desc,
33 * modify isn't current->active_mm. 32 * modify isn't current->active_mm.
34 * If this is called directly by modify_ldt, 33 * If this is called directly by modify_ldt,
35 * (current->active_mm->context.skas.u == mm_idp) 34 * (current->active_mm->context.skas.u == mm_idp)
36 * will be true. So no call to switch_mm_skas(mm_idp) is done. 35 * will be true. So no call to __switch_mm(mm_idp) is done.
37 * If this is called in case of init_new_ldt or PTRACE_LDT, 36 * If this is called in case of init_new_ldt or PTRACE_LDT,
38 * mm_idp won't belong to current->active_mm, but child->mm. 37 * mm_idp won't belong to current->active_mm, but child->mm.
39 * So we need to switch child's mm into our userspace, then 38 * So we need to switch child's mm into our userspace, then
@@ -43,7 +42,7 @@ long write_ldt_entry(struct mm_id * mm_idp, int func, struct user_desc * desc,
43 */ 42 */
44 if(!current->active_mm || current->active_mm == &init_mm || 43 if(!current->active_mm || current->active_mm == &init_mm ||
45 mm_idp != &current->active_mm->context.skas.id) 44 mm_idp != &current->active_mm->context.skas.id)
46 switch_mm_skas(mm_idp); 45 __switch_mm(mm_idp);
47 } 46 }
48 47
49 if(ptrace_ldt) { 48 if(ptrace_ldt) {
@@ -88,7 +87,7 @@ long write_ldt_entry(struct mm_id * mm_idp, int func, struct user_desc * desc,
88 */ 87 */
89 if(current->active_mm && current->active_mm != &init_mm && 88 if(current->active_mm && current->active_mm != &init_mm &&
90 mm_idp != &current->active_mm->context.skas.id) 89 mm_idp != &current->active_mm->context.skas.id)
91 switch_mm_skas(&current->active_mm->context.skas.id); 90 __switch_mm(&current->active_mm->context.skas.id);
92 } 91 }
93 92
94 return res; 93 return res;
diff --git a/arch/um/sys-i386/ptrace.c b/arch/um/sys-i386/ptrace.c
index 7792365827a2..dcf0c6b310c8 100644
--- a/arch/um/sys-i386/ptrace.c
+++ b/arch/um/sys-i386/ptrace.c
@@ -14,16 +14,18 @@
14#include "sysdep/sigcontext.h" 14#include "sysdep/sigcontext.h"
15#include "sysdep/sc.h" 15#include "sysdep/sc.h"
16 16
17void arch_switch_to_skas(struct task_struct *from, struct task_struct *to) 17extern int arch_switch_tls(struct task_struct *from, struct task_struct *to);
18
19void arch_switch_to(struct task_struct *from, struct task_struct *to)
18{ 20{
19 int err = arch_switch_tls_skas(from, to); 21 int err = arch_switch_tls(from, to);
20 if (!err) 22 if (!err)
21 return; 23 return;
22 24
23 if (err != -EINVAL) 25 if (err != -EINVAL)
24 printk(KERN_WARNING "arch_switch_tls_skas failed, errno %d, not EINVAL\n", -err); 26 printk(KERN_WARNING "arch_switch_tls failed, errno %d, not EINVAL\n", -err);
25 else 27 else
26 printk(KERN_WARNING "arch_switch_tls_skas failed, errno = EINVAL\n"); 28 printk(KERN_WARNING "arch_switch_tls failed, errno = EINVAL\n");
27} 29}
28 30
29int is_syscall(unsigned long addr) 31int is_syscall(unsigned long addr)
diff --git a/arch/um/sys-i386/signal.c b/arch/um/sys-i386/signal.c
index a9fe8d6f72c3..c64d48734e3a 100644
--- a/arch/um/sys-i386/signal.c
+++ b/arch/um/sys-i386/signal.c
@@ -14,30 +14,30 @@
14#include "registers.h" 14#include "registers.h"
15#include "skas.h" 15#include "skas.h"
16 16
17void copy_sc(union uml_pt_regs *regs, void *from) 17void copy_sc(struct uml_pt_regs *regs, void *from)
18{ 18{
19 struct sigcontext *sc = from; 19 struct sigcontext *sc = from;
20 20
21 REGS_GS(regs->skas.regs) = sc->gs; 21 REGS_GS(regs->regs) = sc->gs;
22 REGS_FS(regs->skas.regs) = sc->fs; 22 REGS_FS(regs->regs) = sc->fs;
23 REGS_ES(regs->skas.regs) = sc->es; 23 REGS_ES(regs->regs) = sc->es;
24 REGS_DS(regs->skas.regs) = sc->ds; 24 REGS_DS(regs->regs) = sc->ds;
25 REGS_EDI(regs->skas.regs) = sc->edi; 25 REGS_EDI(regs->regs) = sc->edi;
26 REGS_ESI(regs->skas.regs) = sc->esi; 26 REGS_ESI(regs->regs) = sc->esi;
27 REGS_EBP(regs->skas.regs) = sc->ebp; 27 REGS_EBP(regs->regs) = sc->ebp;
28 REGS_SP(regs->skas.regs) = sc->esp; 28 REGS_SP(regs->regs) = sc->esp;
29 REGS_EBX(regs->skas.regs) = sc->ebx; 29 REGS_EBX(regs->regs) = sc->ebx;
30 REGS_EDX(regs->skas.regs) = sc->edx; 30 REGS_EDX(regs->regs) = sc->edx;
31 REGS_ECX(regs->skas.regs) = sc->ecx; 31 REGS_ECX(regs->regs) = sc->ecx;
32 REGS_EAX(regs->skas.regs) = sc->eax; 32 REGS_EAX(regs->regs) = sc->eax;
33 REGS_IP(regs->skas.regs) = sc->eip; 33 REGS_IP(regs->regs) = sc->eip;
34 REGS_CS(regs->skas.regs) = sc->cs; 34 REGS_CS(regs->regs) = sc->cs;
35 REGS_EFLAGS(regs->skas.regs) = sc->eflags; 35 REGS_EFLAGS(regs->regs) = sc->eflags;
36 REGS_SS(regs->skas.regs) = sc->ss; 36 REGS_SS(regs->regs) = sc->ss;
37} 37}
38 38
39static int copy_sc_from_user_skas(struct pt_regs *regs, 39static int copy_sc_from_user(struct pt_regs *regs,
40 struct sigcontext __user *from) 40 struct sigcontext __user *from)
41{ 41{
42 struct sigcontext sc; 42 struct sigcontext sc;
43 unsigned long fpregs[HOST_FP_SIZE]; 43 unsigned long fpregs[HOST_FP_SIZE];
@@ -60,31 +60,32 @@ static int copy_sc_from_user_skas(struct pt_regs *regs,
60 return 0; 60 return 0;
61} 61}
62 62
63int copy_sc_to_user_skas(struct sigcontext __user *to, struct _fpstate __user *to_fp, 63static int copy_sc_to_user(struct sigcontext __user *to,
64 struct pt_regs *regs, unsigned long sp) 64 struct _fpstate __user *to_fp, struct pt_regs *regs,
65 unsigned long sp)
65{ 66{
66 struct sigcontext sc; 67 struct sigcontext sc;
67 unsigned long fpregs[HOST_FP_SIZE]; 68 unsigned long fpregs[HOST_FP_SIZE];
68 struct faultinfo * fi = &current->thread.arch.faultinfo; 69 struct faultinfo * fi = &current->thread.arch.faultinfo;
69 int err; 70 int err;
70 71
71 sc.gs = REGS_GS(regs->regs.skas.regs); 72 sc.gs = REGS_GS(regs->regs.regs);
72 sc.fs = REGS_FS(regs->regs.skas.regs); 73 sc.fs = REGS_FS(regs->regs.regs);
73 sc.es = REGS_ES(regs->regs.skas.regs); 74 sc.es = REGS_ES(regs->regs.regs);
74 sc.ds = REGS_DS(regs->regs.skas.regs); 75 sc.ds = REGS_DS(regs->regs.regs);
75 sc.edi = REGS_EDI(regs->regs.skas.regs); 76 sc.edi = REGS_EDI(regs->regs.regs);
76 sc.esi = REGS_ESI(regs->regs.skas.regs); 77 sc.esi = REGS_ESI(regs->regs.regs);
77 sc.ebp = REGS_EBP(regs->regs.skas.regs); 78 sc.ebp = REGS_EBP(regs->regs.regs);
78 sc.esp = sp; 79 sc.esp = sp;
79 sc.ebx = REGS_EBX(regs->regs.skas.regs); 80 sc.ebx = REGS_EBX(regs->regs.regs);
80 sc.edx = REGS_EDX(regs->regs.skas.regs); 81 sc.edx = REGS_EDX(regs->regs.regs);
81 sc.ecx = REGS_ECX(regs->regs.skas.regs); 82 sc.ecx = REGS_ECX(regs->regs.regs);
82 sc.eax = REGS_EAX(regs->regs.skas.regs); 83 sc.eax = REGS_EAX(regs->regs.regs);
83 sc.eip = REGS_IP(regs->regs.skas.regs); 84 sc.eip = REGS_IP(regs->regs.regs);
84 sc.cs = REGS_CS(regs->regs.skas.regs); 85 sc.cs = REGS_CS(regs->regs.regs);
85 sc.eflags = REGS_EFLAGS(regs->regs.skas.regs); 86 sc.eflags = REGS_EFLAGS(regs->regs.regs);
86 sc.esp_at_signal = regs->regs.skas.regs[UESP]; 87 sc.esp_at_signal = regs->regs.regs[UESP];
87 sc.ss = regs->regs.skas.regs[SS]; 88 sc.ss = regs->regs.regs[SS];
88 sc.cr2 = fi->cr2; 89 sc.cr2 = fi->cr2;
89 sc.err = fi->error_code; 90 sc.err = fi->error_code;
90 sc.trapno = fi->trap_no; 91 sc.trapno = fi->trap_no;
@@ -105,17 +106,6 @@ int copy_sc_to_user_skas(struct sigcontext __user *to, struct _fpstate __user *t
105 copy_to_user(to_fp, fpregs, sizeof(fpregs)); 106 copy_to_user(to_fp, fpregs, sizeof(fpregs));
106} 107}
107 108
108static int copy_sc_from_user(struct pt_regs *to, void __user *from)
109{
110 return copy_sc_from_user_skas(to, from);
111}
112
113static int copy_sc_to_user(struct sigcontext __user *to, struct _fpstate __user *fp,
114 struct pt_regs *from, unsigned long sp)
115{
116 return copy_sc_to_user_skas(to, fp, from, sp);
117}
118
119static int copy_ucontext_to_user(struct ucontext __user *uc, struct _fpstate __user *fp, 109static int copy_ucontext_to_user(struct ucontext __user *uc, struct _fpstate __user *fp,
120 sigset_t *set, unsigned long sp) 110 sigset_t *set, unsigned long sp)
121{ 111{
diff --git a/arch/um/sys-i386/tls.c b/arch/um/sys-i386/tls.c
index bb4d0e23aa81..6cb7cbd137a0 100644
--- a/arch/um/sys-i386/tls.c
+++ b/arch/um/sys-i386/tls.c
@@ -14,9 +14,7 @@
14#include "asm/desc.h" 14#include "asm/desc.h"
15#include "kern.h" 15#include "kern.h"
16#include "kern_util.h" 16#include "kern_util.h"
17#include "mode_kern.h"
18#include "os.h" 17#include "os.h"
19#include "mode.h"
20#include "skas.h" 18#include "skas.h"
21 19
22/* 20/*
@@ -167,7 +165,7 @@ void clear_flushed_tls(struct task_struct *task)
167 * And this will not need be used when (and if) we'll add support to the host 165 * And this will not need be used when (and if) we'll add support to the host
168 * SKAS patch. */ 166 * SKAS patch. */
169 167
170int arch_switch_tls_skas(struct task_struct *from, struct task_struct *to) 168int arch_switch_tls(struct task_struct *from, struct task_struct *to)
171{ 169{
172 if (!host_supports_tls) 170 if (!host_supports_tls)
173 return 0; 171 return 0;
diff --git a/arch/um/sys-x86_64/bugs.c b/arch/um/sys-x86_64/bugs.c
index 095478890371..506b6765bbcb 100644
--- a/arch/um/sys-x86_64/bugs.c
+++ b/arch/um/sys-x86_64/bugs.c
@@ -14,7 +14,7 @@ void arch_check_bugs(void)
14{ 14{
15} 15}
16 16
17int arch_handle_signal(int sig, union uml_pt_regs *regs) 17int arch_handle_signal(int sig, struct uml_pt_regs *regs)
18{ 18{
19 return 0; 19 return 0;
20} 20}
diff --git a/arch/um/sys-x86_64/fault.c b/arch/um/sys-x86_64/fault.c
index 4636b1465b6c..79f37ef3dceb 100644
--- a/arch/um/sys-x86_64/fault.c
+++ b/arch/um/sys-x86_64/fault.c
@@ -14,7 +14,7 @@ struct exception_table_entry
14}; 14};
15 15
16const struct exception_table_entry *search_exception_tables(unsigned long add); 16const struct exception_table_entry *search_exception_tables(unsigned long add);
17int arch_fixup(unsigned long address, union uml_pt_regs *regs) 17int arch_fixup(unsigned long address, struct uml_pt_regs *regs)
18{ 18{
19 const struct exception_table_entry *fixup; 19 const struct exception_table_entry *fixup;
20 20
diff --git a/arch/um/sys-x86_64/signal.c b/arch/um/sys-x86_64/signal.c
index 2d6cdd260c26..a06d66d0c409 100644
--- a/arch/um/sys-x86_64/signal.c
+++ b/arch/um/sys-x86_64/signal.c
@@ -16,12 +16,12 @@
16#include "frame_kern.h" 16#include "frame_kern.h"
17#include "skas.h" 17#include "skas.h"
18 18
19void copy_sc(union uml_pt_regs *regs, void *from) 19void copy_sc(struct uml_pt_regs *regs, void *from)
20{ 20{
21 struct sigcontext *sc = from; 21 struct sigcontext *sc = from;
22 22
23#define GETREG(regs, regno, sc, regname) \ 23#define GETREG(regs, regno, sc, regname) \
24 (regs)->skas.regs[(regno) / sizeof(unsigned long)] = (sc)->regname 24 (regs)->regs[(regno) / sizeof(unsigned long)] = (sc)->regname
25 25
26 GETREG(regs, R8, sc, r8); 26 GETREG(regs, R8, sc, r8);
27 GETREG(regs, R9, sc, r9); 27 GETREG(regs, R9, sc, r9);
@@ -46,13 +46,13 @@ void copy_sc(union uml_pt_regs *regs, void *from)
46#undef GETREG 46#undef GETREG
47} 47}
48 48
49static int copy_sc_from_user_skas(struct pt_regs *regs, 49static int copy_sc_from_user(struct pt_regs *regs,
50 struct sigcontext __user *from) 50 struct sigcontext __user *from)
51{ 51{
52 int err = 0; 52 int err = 0;
53 53
54#define GETREG(regs, regno, sc, regname) \ 54#define GETREG(regs, regno, sc, regname) \
55 __get_user((regs)->regs.skas.regs[(regno) / sizeof(unsigned long)], \ 55 __get_user((regs)->regs.regs[(regno) / sizeof(unsigned long)], \
56 &(sc)->regname) 56 &(sc)->regname)
57 57
58 err |= GETREG(regs, R8, from, r8); 58 err |= GETREG(regs, R8, from, r8);
@@ -80,10 +80,9 @@ static int copy_sc_from_user_skas(struct pt_regs *regs,
80 return err; 80 return err;
81} 81}
82 82
83int copy_sc_to_user_skas(struct sigcontext __user *to, 83static int copy_sc_to_user(struct sigcontext __user *to,
84 struct _fpstate __user *to_fp, 84 struct _fpstate __user *to_fp, struct pt_regs *regs,
85 struct pt_regs *regs, unsigned long mask, 85 unsigned long mask, unsigned long sp)
86 unsigned long sp)
87{ 86{
88 struct faultinfo * fi = &current->thread.arch.faultinfo; 87 struct faultinfo * fi = &current->thread.arch.faultinfo;
89 int err = 0; 88 int err = 0;
@@ -92,7 +91,7 @@ int copy_sc_to_user_skas(struct sigcontext __user *to,
92 err |= __put_user(0, &to->fs); 91 err |= __put_user(0, &to->fs);
93 92
94#define PUTREG(regs, regno, sc, regname) \ 93#define PUTREG(regs, regno, sc, regname) \
95 __put_user((regs)->regs.skas.regs[(regno) / sizeof(unsigned long)], \ 94 __put_user((regs)->regs.regs[(regno) / sizeof(unsigned long)], \
96 &(sc)->regname) 95 &(sc)->regname)
97 96
98 err |= PUTREG(regs, RDI, to, rdi); 97 err |= PUTREG(regs, RDI, to, rdi);
@@ -130,22 +129,6 @@ int copy_sc_to_user_skas(struct sigcontext __user *to,
130 return(err); 129 return(err);
131} 130}
132 131
133static int copy_sc_from_user(struct pt_regs *to, void __user *from)
134{
135 int ret;
136
137 ret = copy_sc_from_user_skas(to, from);
138 return(ret);
139}
140
141static int copy_sc_to_user(struct sigcontext __user *to,
142 struct _fpstate __user *fp,
143 struct pt_regs *from, unsigned long mask,
144 unsigned long sp)
145{
146 return copy_sc_to_user_skas(to, fp, from, mask, sp);
147}
148
149struct rt_sigframe 132struct rt_sigframe
150{ 133{
151 char __user *pretcode; 134 char __user *pretcode;
diff --git a/arch/um/sys-x86_64/syscalls.c b/arch/um/sys-x86_64/syscalls.c
index d44398c9d27a..bbcab773b23d 100644
--- a/arch/um/sys-x86_64/syscalls.c
+++ b/arch/um/sys-x86_64/syscalls.c
@@ -28,8 +28,7 @@ asmlinkage long sys_uname64(struct new_utsname __user * name)
28 return err ? -EFAULT : 0; 28 return err ? -EFAULT : 0;
29} 29}
30 30
31long arch_prctl_skas(struct task_struct *task, int code, 31long arch_prctl(struct task_struct *task, int code, unsigned long __user *addr)
32 unsigned long __user *addr)
33{ 32{
34 unsigned long *ptr = addr, tmp; 33 unsigned long *ptr = addr, tmp;
35 long ret; 34 long ret;
@@ -91,7 +90,7 @@ long arch_prctl_skas(struct task_struct *task, int code,
91 90
92long sys_arch_prctl(int code, unsigned long addr) 91long sys_arch_prctl(int code, unsigned long addr)
93{ 92{
94 return arch_prctl_skas(current, code, (unsigned long __user *) addr); 93 return arch_prctl(current, code, (unsigned long __user *) addr);
95} 94}
96 95
97long sys_clone(unsigned long clone_flags, unsigned long newsp, 96long sys_clone(unsigned long clone_flags, unsigned long newsp,
@@ -108,10 +107,10 @@ long sys_clone(unsigned long clone_flags, unsigned long newsp,
108 return ret; 107 return ret;
109} 108}
110 109
111void arch_switch_to_skas(struct task_struct *from, struct task_struct *to) 110void arch_switch_to(struct task_struct *from, struct task_struct *to)
112{ 111{
113 if((to->thread.arch.fs == 0) || (to->mm == NULL)) 112 if((to->thread.arch.fs == 0) || (to->mm == NULL))
114 return; 113 return;
115 114
116 arch_prctl_skas(to, ARCH_SET_FS, (void __user *) to->thread.arch.fs); 115 arch_prctl(to, ARCH_SET_FS, (void __user *) to->thread.arch.fs);
117} 116}
diff --git a/arch/um/sys-x86_64/tls.c b/arch/um/sys-x86_64/tls.c
index febbc94be25f..fcd5217c26a5 100644
--- a/arch/um/sys-x86_64/tls.c
+++ b/arch/um/sys-x86_64/tls.c
@@ -11,7 +11,7 @@ int arch_copy_tls(struct task_struct *t)
11 * (which is argument 5, child_tid, of clone) so it can be set 11 * (which is argument 5, child_tid, of clone) so it can be set
12 * during context switches. 12 * during context switches.
13 */ 13 */
14 t->thread.arch.fs = t->thread.regs.regs.skas.regs[R8 / sizeof(long)]; 14 t->thread.arch.fs = t->thread.regs.regs.regs[R8 / sizeof(long)];
15 15
16 return 0; 16 return 0;
17} 17}
diff --git a/include/asm-um/mmu_context.h b/include/asm-um/mmu_context.h
index a4186af65f24..0c4a375000a9 100644
--- a/include/asm-um/mmu_context.h
+++ b/include/asm-um/mmu_context.h
@@ -29,7 +29,7 @@ static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
29 * possible. 29 * possible.
30 */ 30 */
31 if (old != new && (current->flags & PF_BORROWED_MM)) 31 if (old != new && (current->flags & PF_BORROWED_MM))
32 switch_mm_skas(&new->context.skas.id); 32 __switch_mm(&new->context.skas.id);
33} 33}
34 34
35static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, 35static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
@@ -41,7 +41,7 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
41 cpu_clear(cpu, prev->cpu_vm_mask); 41 cpu_clear(cpu, prev->cpu_vm_mask);
42 cpu_set(cpu, next->cpu_vm_mask); 42 cpu_set(cpu, next->cpu_vm_mask);
43 if(next != &init_mm) 43 if(next != &init_mm)
44 switch_mm_skas(&next->context.skas.id); 44 __switch_mm(&next->context.skas.id);
45 } 45 }
46} 46}
47 47
@@ -50,21 +50,9 @@ static inline void enter_lazy_tlb(struct mm_struct *mm,
50{ 50{
51} 51}
52 52
53extern int init_new_context_skas(struct task_struct *task, 53extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
54 struct mm_struct *mm);
55 54
56static inline int init_new_context(struct task_struct *task, 55extern void destroy_context(struct mm_struct *mm);
57 struct mm_struct *mm)
58{
59 return(init_new_context_skas(task, mm));
60}
61
62extern void destroy_context_skas(struct mm_struct *mm);
63
64static inline void destroy_context(struct mm_struct *mm)
65{
66 destroy_context_skas(mm);
67}
68 56
69#endif 57#endif
70 58
diff --git a/include/asm-um/processor-generic.h b/include/asm-um/processor-generic.h
index be3ffec3a6a6..126df73f5401 100644
--- a/include/asm-um/processor-generic.h
+++ b/include/asm-um/processor-generic.h
@@ -32,12 +32,8 @@ struct thread_struct {
32 unsigned long temp_stack; 32 unsigned long temp_stack;
33 void *exec_buf; 33 void *exec_buf;
34 struct arch_thread arch; 34 struct arch_thread arch;
35 union { 35 jmp_buf switch_buf;
36 struct { 36 int mm_count;
37 jmp_buf switch_buf;
38 int mm_count;
39 } skas;
40 } mode;
41 struct { 37 struct {
42 int op; 38 int op;
43 union { 39 union {
@@ -75,7 +71,10 @@ typedef struct {
75 71
76extern struct task_struct *alloc_task_struct(void); 72extern struct task_struct *alloc_task_struct(void);
77 73
78extern void release_thread(struct task_struct *); 74static inline void release_thread(struct task_struct *task)
75{
76}
77
79extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); 78extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
80 79
81static inline void prepare_to_copy(struct task_struct *tsk) 80static inline void prepare_to_copy(struct task_struct *tsk)
@@ -125,8 +124,7 @@ extern struct cpuinfo_um cpu_data[];
125#endif 124#endif
126 125
127 126
128#define KSTK_REG(tsk, reg) \ 127#define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
129 get_thread_reg(reg, &tsk->thread.mode.skas.switch_buf)
130#define get_wchan(p) (0) 128#define get_wchan(p) (0)
131 129
132#endif 130#endif
diff --git a/include/asm-um/ptrace-generic.h b/include/asm-um/ptrace-generic.h
index 99c87c5ce994..c8b3e6bf6a43 100644
--- a/include/asm-um/ptrace-generic.h
+++ b/include/asm-um/ptrace-generic.h
@@ -12,7 +12,7 @@
12#include "sysdep/ptrace.h" 12#include "sysdep/ptrace.h"
13 13
14struct pt_regs { 14struct pt_regs {
15 union uml_pt_regs regs; 15 struct uml_pt_regs regs;
16}; 16};
17 17
18#define EMPTY_REGS { .regs = EMPTY_UML_PT_REGS } 18#define EMPTY_REGS { .regs = EMPTY_UML_PT_REGS }
@@ -44,7 +44,7 @@ extern int set_fpxregs(unsigned long buf, struct task_struct *tsk);
44 44
45extern void show_regs(struct pt_regs *regs); 45extern void show_regs(struct pt_regs *regs);
46 46
47extern void send_sigtrap(struct task_struct *tsk, union uml_pt_regs *regs, 47extern void send_sigtrap(struct task_struct *tsk, struct uml_pt_regs *regs,
48 int error_code); 48 int error_code);
49 49
50extern int arch_copy_tls(struct task_struct *new); 50extern int arch_copy_tls(struct task_struct *new);
diff --git a/include/asm-um/ptrace-i386.h b/include/asm-um/ptrace-i386.h
index 4928a31aca7d..b733fa32b618 100644
--- a/include/asm-um/ptrace-i386.h
+++ b/include/asm-um/ptrace-i386.h
@@ -46,21 +46,4 @@ extern int ptrace_get_thread_area(struct task_struct *child, int idx,
46extern int ptrace_set_thread_area(struct task_struct *child, int idx, 46extern int ptrace_set_thread_area(struct task_struct *child, int idx,
47 struct user_desc __user *user_desc); 47 struct user_desc __user *user_desc);
48 48
49extern int do_set_thread_area_skas(struct user_desc *info);
50extern int do_get_thread_area_skas(struct user_desc *info);
51
52extern int do_set_thread_area_tt(struct user_desc *info);
53extern int do_get_thread_area_tt(struct user_desc *info);
54
55extern int arch_switch_tls_skas(struct task_struct *from, struct task_struct *to);
56extern int arch_switch_tls_tt(struct task_struct *from, struct task_struct *to);
57
58extern void arch_switch_to_tt(struct task_struct *from, struct task_struct *to);
59extern void arch_switch_to_skas(struct task_struct *from, struct task_struct *to);
60
61extern int do_get_thread_area_skas(struct user_desc *info);
62extern int do_set_thread_area_skas(struct user_desc *info);
63
64struct task_struct;
65
66#endif 49#endif
diff --git a/include/asm-um/ptrace-x86_64.h b/include/asm-um/ptrace-x86_64.h
index bf61d17de3f7..4c475350dcf0 100644
--- a/include/asm-um/ptrace-x86_64.h
+++ b/include/asm-um/ptrace-x86_64.h
@@ -76,15 +76,6 @@ static inline int ptrace_set_thread_area(struct task_struct *child, int idx,
76 return -ENOSYS; 76 return -ENOSYS;
77} 77}
78 78
79static inline void arch_switch_to_tt(struct task_struct *from, 79extern long arch_prctl(struct task_struct *task, int code,
80 struct task_struct *to) 80 unsigned long __user *addr);
81{
82}
83
84extern void arch_switch_to_skas(struct task_struct *from,
85 struct task_struct *to);
86
87extern long arch_prctl_skas(struct task_struct *task, int code,
88 unsigned long __user *addr);
89
90#endif 81#endif
diff --git a/include/asm-um/tlbflush.h b/include/asm-um/tlbflush.h
index 1520b083e9db..9d647c55350b 100644
--- a/include/asm-um/tlbflush.h
+++ b/include/asm-um/tlbflush.h
@@ -24,18 +24,7 @@ extern void flush_tlb_all(void);
24extern void flush_tlb_mm(struct mm_struct *mm); 24extern void flush_tlb_mm(struct mm_struct *mm);
25extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, 25extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
26 unsigned long end); 26 unsigned long end);
27extern void flush_tlb_page_skas(struct vm_area_struct *vma, 27extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long address);
28 unsigned long address);
29
30static inline void flush_tlb_page(struct vm_area_struct *vma,
31 unsigned long address)
32{
33 address &= PAGE_MASK;
34
35 flush_tlb_page_skas(vma, address);
36}
37
38extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
39extern void flush_tlb_kernel_vm(void); 28extern void flush_tlb_kernel_vm(void);
40extern void flush_tlb_kernel_range(unsigned long start, unsigned long end); 29extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
41extern void __flush_tlb_one(unsigned long addr); 30extern void __flush_tlb_one(unsigned long addr);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-15 05:39:59 -0500