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-rw-r--r--arch/um/include/kern_util.h2
-rw-r--r--arch/um/include/os.h10
-rw-r--r--arch/um/include/signal_user.h28
-rw-r--r--arch/um/kernel/Makefile2
-rw-r--r--arch/um/kernel/irq_user.c1
-rw-r--r--arch/um/kernel/process_kern.c1
-rw-r--r--arch/um/kernel/signal_kern.c1
-rw-r--r--arch/um/kernel/signal_user.c157
-rw-r--r--arch/um/kernel/skas/include/skas.h1
-rw-r--r--arch/um/kernel/skas/process.c11
-rw-r--r--arch/um/kernel/skas/process_kern.c1
-rw-r--r--arch/um/kernel/skas/trap_user.c2
-rw-r--r--arch/um/kernel/time.c2
-rw-r--r--arch/um/kernel/trap_user.c1
-rw-r--r--arch/um/kernel/tt/exec_kern.c1
-rw-r--r--arch/um/kernel/tt/process_kern.c1
-rw-r--r--arch/um/kernel/tt/tracer.c1
-rw-r--r--arch/um/kernel/tt/trap_user.c2
-rw-r--r--arch/um/os-Linux/main.c1
-rw-r--r--arch/um/os-Linux/process.c1
-rw-r--r--arch/um/os-Linux/signal.c158
-rw-r--r--arch/um/os-Linux/start_up.c1
-rw-r--r--arch/um/os-Linux/tt.c1
-rw-r--r--arch/um/sys-i386/signal.c1
24 files changed, 162 insertions, 226 deletions
diff --git a/arch/um/include/kern_util.h b/arch/um/include/kern_util.h
index e5fec557019..58c0b10fcf2 100644
--- a/arch/um/include/kern_util.h
+++ b/arch/um/include/kern_util.h
@@ -51,8 +51,6 @@ extern void timer_handler(int sig, union uml_pt_regs *regs);
51extern int set_signals(int enable); 51extern int set_signals(int enable);
52extern void force_sigbus(void); 52extern void force_sigbus(void);
53extern int pid_to_processor_id(int pid); 53extern int pid_to_processor_id(int pid);
54extern void block_signals(void);
55extern void unblock_signals(void);
56extern void deliver_signals(void *t); 54extern void deliver_signals(void *t);
57extern int next_syscall_index(int max); 55extern int next_syscall_index(int max);
58extern int next_trap_index(int max); 56extern int next_trap_index(int max);
diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index c279ee6d89e..cfc806e4610 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -219,4 +219,14 @@ extern int umid_file_name(char *name, char *buf, int len);
219extern int set_umid(char *name); 219extern int set_umid(char *name);
220extern char *get_umid(void); 220extern char *get_umid(void);
221 221
222/* signal.c */
223extern void set_sigstack(void *sig_stack, int size);
224extern void remove_sigstack(void);
225extern void set_handler(int sig, void (*handler)(int), int flags, ...);
226extern int change_sig(int signal, int on);
227extern void block_signals(void);
228extern void unblock_signals(void);
229extern int get_signals(void);
230extern int set_signals(int enable);
231
222#endif 232#endif
diff --git a/arch/um/include/signal_user.h b/arch/um/include/signal_user.h
deleted file mode 100644
index b075e543d86..00000000000
--- a/arch/um/include/signal_user.h
+++ /dev/null
@@ -1,28 +0,0 @@
1/*
2 * Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
5
6#ifndef __SIGNAL_USER_H__
7#define __SIGNAL_USER_H__
8
9extern int signal_stack_size;
10
11extern int change_sig(int signal, int on);
12extern void set_sigstack(void *stack, int size);
13extern void set_handler(int sig, void (*handler)(int), int flags, ...);
14extern int set_signals(int enable);
15extern int get_signals(void);
16
17#endif
18
19/*
20 * Overrides for Emacs so that we follow Linus's tabbing style.
21 * Emacs will notice this stuff at the end of the file and automatically
22 * adjust the settings for this buffer only. This must remain at the end
23 * of the file.
24 * ---------------------------------------------------------------------------
25 * Local variables:
26 * c-file-style: "linux"
27 * End:
28 */
diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile
index 6f7700593a6..9ce6c57747a 100644
--- a/arch/um/kernel/Makefile
+++ b/arch/um/kernel/Makefile
@@ -9,7 +9,7 @@ clean-files :=
9obj-y = config.o exec_kern.o exitcode.o \ 9obj-y = config.o exec_kern.o exitcode.o \
10 init_task.o irq.o irq_user.o ksyms.o mem.o physmem.o \ 10 init_task.o irq.o irq_user.o ksyms.o mem.o physmem.o \
11 process_kern.o ptrace.o reboot.o resource.o sigio_user.o sigio_kern.o \ 11 process_kern.o ptrace.o reboot.o resource.o sigio_user.o sigio_kern.o \
12 signal_kern.o signal_user.o smp.o syscall_kern.o sysrq.o time.o \ 12 signal_kern.o smp.o syscall_kern.o sysrq.o time.o \
13 time_kern.o tlb.o trap_kern.o trap_user.o uaccess.o um_arch.o umid.o \ 13 time_kern.o tlb.o trap_kern.o trap_user.o uaccess.o um_arch.o umid.o \
14 user_util.o 14 user_util.o
15 15
diff --git a/arch/um/kernel/irq_user.c b/arch/um/kernel/irq_user.c
index 50a2aa35cda..0e32f5f4a88 100644
--- a/arch/um/kernel/irq_user.c
+++ b/arch/um/kernel/irq_user.c
@@ -15,7 +15,6 @@
15#include "kern_util.h" 15#include "kern_util.h"
16#include "user.h" 16#include "user.h"
17#include "process.h" 17#include "process.h"
18#include "signal_user.h"
19#include "sigio.h" 18#include "sigio.h"
20#include "irq_user.h" 19#include "irq_user.h"
21#include "os.h" 20#include "os.h"
diff --git a/arch/um/kernel/process_kern.c b/arch/um/kernel/process_kern.c
index 651abf255bc..d2d3f256778 100644
--- a/arch/um/kernel/process_kern.c
+++ b/arch/um/kernel/process_kern.c
@@ -36,7 +36,6 @@
36#include "kern_util.h" 36#include "kern_util.h"
37#include "kern.h" 37#include "kern.h"
38#include "signal_kern.h" 38#include "signal_kern.h"
39#include "signal_user.h"
40#include "init.h" 39#include "init.h"
41#include "irq_user.h" 40#include "irq_user.h"
42#include "mem_user.h" 41#include "mem_user.h"
diff --git a/arch/um/kernel/signal_kern.c b/arch/um/kernel/signal_kern.c
index 03618bd13d5..7b0e0e81c16 100644
--- a/arch/um/kernel/signal_kern.c
+++ b/arch/um/kernel/signal_kern.c
@@ -22,7 +22,6 @@
22#include "asm/ucontext.h" 22#include "asm/ucontext.h"
23#include "kern_util.h" 23#include "kern_util.h"
24#include "signal_kern.h" 24#include "signal_kern.h"
25#include "signal_user.h"
26#include "kern.h" 25#include "kern.h"
27#include "frame_kern.h" 26#include "frame_kern.h"
28#include "sigcontext.h" 27#include "sigcontext.h"
diff --git a/arch/um/kernel/signal_user.c b/arch/um/kernel/signal_user.c
deleted file mode 100644
index 62f457835fb..00000000000
--- a/arch/um/kernel/signal_user.c
+++ /dev/null
@@ -1,157 +0,0 @@
1/*
2 * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
5
6#include <stdio.h>
7#include <unistd.h>
8#include <stdlib.h>
9#include <signal.h>
10#include <errno.h>
11#include <stdarg.h>
12#include <string.h>
13#include <sys/mman.h>
14#include "user_util.h"
15#include "kern_util.h"
16#include "user.h"
17#include "signal_user.h"
18#include "signal_kern.h"
19#include "sysdep/sigcontext.h"
20#include "sigcontext.h"
21
22void set_sigstack(void *sig_stack, int size)
23{
24 stack_t stack = ((stack_t) { .ss_flags = 0,
25 .ss_sp = (__ptr_t) sig_stack,
26 .ss_size = size - sizeof(void *) });
27
28 if(sigaltstack(&stack, NULL) != 0)
29 panic("enabling signal stack failed, errno = %d\n", errno);
30}
31
32void set_handler(int sig, void (*handler)(int), int flags, ...)
33{
34 struct sigaction action;
35 va_list ap;
36 int mask;
37
38 va_start(ap, flags);
39 action.sa_handler = handler;
40 sigemptyset(&action.sa_mask);
41 while((mask = va_arg(ap, int)) != -1){
42 sigaddset(&action.sa_mask, mask);
43 }
44 va_end(ap);
45 action.sa_flags = flags;
46 action.sa_restorer = NULL;
47 if(sigaction(sig, &action, NULL) < 0)
48 panic("sigaction failed");
49}
50
51int change_sig(int signal, int on)
52{
53 sigset_t sigset, old;
54
55 sigemptyset(&sigset);
56 sigaddset(&sigset, signal);
57 sigprocmask(on ? SIG_UNBLOCK : SIG_BLOCK, &sigset, &old);
58 return(!sigismember(&old, signal));
59}
60
61/* Both here and in set/get_signal we don't touch SIGPROF, because we must not
62 * disable profiling; it's safe because the profiling code does not interact
63 * with the kernel code at all.*/
64
65static void change_signals(int type)
66{
67 sigset_t mask;
68
69 sigemptyset(&mask);
70 sigaddset(&mask, SIGVTALRM);
71 sigaddset(&mask, SIGALRM);
72 sigaddset(&mask, SIGIO);
73 if(sigprocmask(type, &mask, NULL) < 0)
74 panic("Failed to change signal mask - errno = %d", errno);
75}
76
77void block_signals(void)
78{
79 change_signals(SIG_BLOCK);
80}
81
82void unblock_signals(void)
83{
84 change_signals(SIG_UNBLOCK);
85}
86
87/* These are the asynchronous signals. SIGVTALRM and SIGARLM are handled
88 * together under SIGVTALRM_BIT. SIGPROF is excluded because we want to
89 * be able to profile all of UML, not just the non-critical sections. If
90 * profiling is not thread-safe, then that is not my problem. We can disable
91 * profiling when SMP is enabled in that case.
92 */
93#define SIGIO_BIT 0
94#define SIGVTALRM_BIT 1
95
96static int enable_mask(sigset_t *mask)
97{
98 int sigs;
99
100 sigs = sigismember(mask, SIGIO) ? 0 : 1 << SIGIO_BIT;
101 sigs |= sigismember(mask, SIGVTALRM) ? 0 : 1 << SIGVTALRM_BIT;
102 sigs |= sigismember(mask, SIGALRM) ? 0 : 1 << SIGVTALRM_BIT;
103 return(sigs);
104}
105
106int get_signals(void)
107{
108 sigset_t mask;
109
110 if(sigprocmask(SIG_SETMASK, NULL, &mask) < 0)
111 panic("Failed to get signal mask");
112 return(enable_mask(&mask));
113}
114
115int set_signals(int enable)
116{
117 sigset_t mask;
118 int ret;
119
120 sigemptyset(&mask);
121 if(enable & (1 << SIGIO_BIT))
122 sigaddset(&mask, SIGIO);
123 if(enable & (1 << SIGVTALRM_BIT)){
124 sigaddset(&mask, SIGVTALRM);
125 sigaddset(&mask, SIGALRM);
126 }
127
128 /* This is safe - sigprocmask is guaranteed to copy locally the
129 * value of new_set, do his work and then, at the end, write to
130 * old_set.
131 */
132 if(sigprocmask(SIG_UNBLOCK, &mask, &mask) < 0)
133 panic("Failed to enable signals");
134 ret = enable_mask(&mask);
135 sigemptyset(&mask);
136 if((enable & (1 << SIGIO_BIT)) == 0)
137 sigaddset(&mask, SIGIO);
138 if((enable & (1 << SIGVTALRM_BIT)) == 0){
139 sigaddset(&mask, SIGVTALRM);
140 sigaddset(&mask, SIGALRM);
141 }
142 if(sigprocmask(SIG_BLOCK, &mask, NULL) < 0)
143 panic("Failed to block signals");
144
145 return(ret);
146}
147
148/*
149 * Overrides for Emacs so that we follow Linus's tabbing style.
150 * Emacs will notice this stuff at the end of the file and automatically
151 * adjust the settings for this buffer only. This must remain at the end
152 * of the file.
153 * ---------------------------------------------------------------------------
154 * Local variables:
155 * c-file-style: "linux"
156 * End:
157 */
diff --git a/arch/um/kernel/skas/include/skas.h b/arch/um/kernel/skas/include/skas.h
index daa2f85b684..01d489de398 100644
--- a/arch/um/kernel/skas/include/skas.h
+++ b/arch/um/kernel/skas/include/skas.h
@@ -22,7 +22,6 @@ extern int start_idle_thread(void *stack, void *switch_buf_ptr,
22extern int user_thread(unsigned long stack, int flags); 22extern int user_thread(unsigned long stack, int flags);
23extern void userspace(union uml_pt_regs *regs); 23extern void userspace(union uml_pt_regs *regs);
24extern void new_thread_proc(void *stack, void (*handler)(int sig)); 24extern void new_thread_proc(void *stack, void (*handler)(int sig));
25extern void remove_sigstack(void);
26extern void new_thread_handler(int sig); 25extern void new_thread_handler(int sig);
27extern void handle_syscall(union uml_pt_regs *regs); 26extern void handle_syscall(union uml_pt_regs *regs);
28extern int map(struct mm_id * mm_idp, unsigned long virt, 27extern int map(struct mm_id * mm_idp, unsigned long virt,
diff --git a/arch/um/kernel/skas/process.c b/arch/um/kernel/skas/process.c
index 599d679bd4f..9264d4021df 100644
--- a/arch/um/kernel/skas/process.c
+++ b/arch/um/kernel/skas/process.c
@@ -31,7 +31,6 @@
31#include "proc_mm.h" 31#include "proc_mm.h"
32#include "skas_ptrace.h" 32#include "skas_ptrace.h"
33#include "chan_user.h" 33#include "chan_user.h"
34#include "signal_user.h"
35#include "registers.h" 34#include "registers.h"
36#include "mem.h" 35#include "mem.h"
37#include "uml-config.h" 36#include "uml-config.h"
@@ -514,16 +513,6 @@ int start_idle_thread(void *stack, void *switch_buf_ptr, void **fork_buf_ptr)
514 siglongjmp(**switch_buf, 1); 513 siglongjmp(**switch_buf, 1);
515} 514}
516 515
517void remove_sigstack(void)
518{
519 stack_t stack = ((stack_t) { .ss_flags = SS_DISABLE,
520 .ss_sp = NULL,
521 .ss_size = 0 });
522
523 if(sigaltstack(&stack, NULL) != 0)
524 panic("disabling signal stack failed, errno = %d\n", errno);
525}
526
527void initial_thread_cb_skas(void (*proc)(void *), void *arg) 516void initial_thread_cb_skas(void (*proc)(void *), void *arg)
528{ 517{
529 sigjmp_buf here; 518 sigjmp_buf here;
diff --git a/arch/um/kernel/skas/process_kern.c b/arch/um/kernel/skas/process_kern.c
index 9c990253966..09790ccb161 100644
--- a/arch/um/kernel/skas/process_kern.c
+++ b/arch/um/kernel/skas/process_kern.c
@@ -14,7 +14,6 @@
14#include "asm/atomic.h" 14#include "asm/atomic.h"
15#include "kern_util.h" 15#include "kern_util.h"
16#include "time_user.h" 16#include "time_user.h"
17#include "signal_user.h"
18#include "skas.h" 17#include "skas.h"
19#include "os.h" 18#include "os.h"
20#include "user_util.h" 19#include "user_util.h"
diff --git a/arch/um/kernel/skas/trap_user.c b/arch/um/kernel/skas/trap_user.c
index 9950a6716fe..28403d2cafe 100644
--- a/arch/um/kernel/skas/trap_user.c
+++ b/arch/um/kernel/skas/trap_user.c
@@ -5,7 +5,6 @@
5 5
6#include <signal.h> 6#include <signal.h>
7#include <errno.h> 7#include <errno.h>
8#include "signal_user.h"
9#include "user_util.h" 8#include "user_util.h"
10#include "kern_util.h" 9#include "kern_util.h"
11#include "task.h" 10#include "task.h"
@@ -14,6 +13,7 @@
14#include "ptrace_user.h" 13#include "ptrace_user.h"
15#include "sysdep/ptrace.h" 14#include "sysdep/ptrace.h"
16#include "sysdep/ptrace_user.h" 15#include "sysdep/ptrace_user.h"
16#include "os.h"
17 17
18void sig_handler_common_skas(int sig, void *sc_ptr) 18void sig_handler_common_skas(int sig, void *sc_ptr)
19{ 19{
diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c
index c40b611e3d9..11f518a7e15 100644
--- a/arch/um/kernel/time.c
+++ b/arch/um/kernel/time.c
@@ -14,9 +14,9 @@
14#include "kern_util.h" 14#include "kern_util.h"
15#include "user.h" 15#include "user.h"
16#include "process.h" 16#include "process.h"
17#include "signal_user.h"
18#include "time_user.h" 17#include "time_user.h"
19#include "kern_constants.h" 18#include "kern_constants.h"
19#include "os.h"
20 20
21/* XXX This really needs to be declared and initialized in a kernel file since 21/* XXX This really needs to be declared and initialized in a kernel file since
22 * it's in <linux/time.h> 22 * it's in <linux/time.h>
diff --git a/arch/um/kernel/trap_user.c b/arch/um/kernel/trap_user.c
index e9ccd6b8d3c..e5511072512 100644
--- a/arch/um/kernel/trap_user.c
+++ b/arch/um/kernel/trap_user.c
@@ -17,7 +17,6 @@
17#include "sigcontext.h" 17#include "sigcontext.h"
18#include "sysdep/sigcontext.h" 18#include "sysdep/sigcontext.h"
19#include "irq_user.h" 19#include "irq_user.h"
20#include "signal_user.h"
21#include "time_user.h" 20#include "time_user.h"
22#include "task.h" 21#include "task.h"
23#include "mode.h" 22#include "mode.h"
diff --git a/arch/um/kernel/tt/exec_kern.c b/arch/um/kernel/tt/exec_kern.c
index 065b504a653..136e54c47d3 100644
--- a/arch/um/kernel/tt/exec_kern.c
+++ b/arch/um/kernel/tt/exec_kern.c
@@ -14,7 +14,6 @@
14#include "kern_util.h" 14#include "kern_util.h"
15#include "irq_user.h" 15#include "irq_user.h"
16#include "time_user.h" 16#include "time_user.h"
17#include "signal_user.h"
18#include "mem_user.h" 17#include "mem_user.h"
19#include "os.h" 18#include "os.h"
20#include "tlb.h" 19#include "tlb.h"
diff --git a/arch/um/kernel/tt/process_kern.c b/arch/um/kernel/tt/process_kern.c
index cfaa373a6e7..14d4622a5fb 100644
--- a/arch/um/kernel/tt/process_kern.c
+++ b/arch/um/kernel/tt/process_kern.c
@@ -13,7 +13,6 @@
13#include "asm/ptrace.h" 13#include "asm/ptrace.h"
14#include "asm/tlbflush.h" 14#include "asm/tlbflush.h"
15#include "irq_user.h" 15#include "irq_user.h"
16#include "signal_user.h"
17#include "kern_util.h" 16#include "kern_util.h"
18#include "user_util.h" 17#include "user_util.h"
19#include "os.h" 18#include "os.h"
diff --git a/arch/um/kernel/tt/tracer.c b/arch/um/kernel/tt/tracer.c
index d11e7399d7a..71daae24e48 100644
--- a/arch/um/kernel/tt/tracer.c
+++ b/arch/um/kernel/tt/tracer.c
@@ -19,7 +19,6 @@
19#include "sigcontext.h" 19#include "sigcontext.h"
20#include "sysdep/sigcontext.h" 20#include "sysdep/sigcontext.h"
21#include "os.h" 21#include "os.h"
22#include "signal_user.h"
23#include "user_util.h" 22#include "user_util.h"
24#include "mem_user.h" 23#include "mem_user.h"
25#include "process.h" 24#include "process.h"
diff --git a/arch/um/kernel/tt/trap_user.c b/arch/um/kernel/tt/trap_user.c
index fc108615bea..7501900f894 100644
--- a/arch/um/kernel/tt/trap_user.c
+++ b/arch/um/kernel/tt/trap_user.c
@@ -8,11 +8,11 @@
8#include <signal.h> 8#include <signal.h>
9#include "sysdep/ptrace.h" 9#include "sysdep/ptrace.h"
10#include "sysdep/sigcontext.h" 10#include "sysdep/sigcontext.h"
11#include "signal_user.h"
12#include "user_util.h" 11#include "user_util.h"
13#include "kern_util.h" 12#include "kern_util.h"
14#include "task.h" 13#include "task.h"
15#include "tt.h" 14#include "tt.h"
15#include "os.h"
16 16
17void sig_handler_common_tt(int sig, void *sc_ptr) 17void sig_handler_common_tt(int sig, void *sc_ptr)
18{ 18{
diff --git a/arch/um/os-Linux/main.c b/arch/um/os-Linux/main.c
index 23da27d2256..172c8474453 100644
--- a/arch/um/os-Linux/main.c
+++ b/arch/um/os-Linux/main.c
@@ -16,7 +16,6 @@
16#include "user_util.h" 16#include "user_util.h"
17#include "kern_util.h" 17#include "kern_util.h"
18#include "mem_user.h" 18#include "mem_user.h"
19#include "signal_user.h"
20#include "time_user.h" 19#include "time_user.h"
21#include "irq_user.h" 20#include "irq_user.h"
22#include "user.h" 21#include "user.h"
diff --git a/arch/um/os-Linux/process.c b/arch/um/os-Linux/process.c
index d9c52387c4a..39815c6b5e4 100644
--- a/arch/um/os-Linux/process.c
+++ b/arch/um/os-Linux/process.c
@@ -15,7 +15,6 @@
15#include "os.h" 15#include "os.h"
16#include "user.h" 16#include "user.h"
17#include "user_util.h" 17#include "user_util.h"
18#include "signal_user.h"
19#include "process.h" 18#include "process.h"
20#include "irq_user.h" 19#include "irq_user.h"
21#include "kern_util.h" 20#include "kern_util.h"
diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c
index c7bfd5ee392..c1f46a0fef1 100644
--- a/arch/um/os-Linux/signal.c
+++ b/arch/um/os-Linux/signal.c
@@ -4,9 +4,22 @@
4 */ 4 */
5 5
6#include <signal.h> 6#include <signal.h>
7#include <stdio.h>
8#include <unistd.h>
9#include <stdlib.h>
10#include <errno.h>
11#include <stdarg.h>
12#include <string.h>
13#include <sys/mman.h>
14#include "user_util.h"
15#include "kern_util.h"
16#include "user.h"
17#include "signal_kern.h"
18#include "sysdep/sigcontext.h"
19#include "sysdep/signal.h"
20#include "sigcontext.h"
7#include "time_user.h" 21#include "time_user.h"
8#include "mode.h" 22#include "mode.h"
9#include "sysdep/signal.h"
10 23
11void sig_handler(ARCH_SIGHDLR_PARAM) 24void sig_handler(ARCH_SIGHDLR_PARAM)
12{ 25{
@@ -36,13 +49,138 @@ void alarm_handler(ARCH_SIGHDLR_PARAM)
36 switch_timers(1); 49 switch_timers(1);
37} 50}
38 51
39/* 52void set_sigstack(void *sig_stack, int size)
40 * Overrides for Emacs so that we follow Linus's tabbing style. 53{
41 * Emacs will notice this stuff at the end of the file and automatically 54 stack_t stack = ((stack_t) { .ss_flags = 0,
42 * adjust the settings for this buffer only. This must remain at the end 55 .ss_sp = (__ptr_t) sig_stack,
43 * of the file. 56 .ss_size = size - sizeof(void *) });
44 * --------------------------------------------------------------------------- 57
45 * Local variables: 58 if(sigaltstack(&stack, NULL) != 0)
46 * c-file-style: "linux" 59 panic("enabling signal stack failed, errno = %d\n", errno);
47 * End: 60}
61
62void remove_sigstack(void)
63{
64 stack_t stack = ((stack_t) { .ss_flags = SS_DISABLE,
65 .ss_sp = NULL,
66 .ss_size = 0 });
67
68 if(sigaltstack(&stack, NULL) != 0)
69 panic("disabling signal stack failed, errno = %d\n", errno);
70}
71
72void set_handler(int sig, void (*handler)(int), int flags, ...)
73{
74 struct sigaction action;
75 va_list ap;
76 int mask;
77
78 va_start(ap, flags);
79 action.sa_handler = handler;
80 sigemptyset(&action.sa_mask);
81 while((mask = va_arg(ap, int)) != -1){
82 sigaddset(&action.sa_mask, mask);
83 }
84 va_end(ap);
85 action.sa_flags = flags;
86 action.sa_restorer = NULL;
87 if(sigaction(sig, &action, NULL) < 0)
88 panic("sigaction failed");
89}
90
91int change_sig(int signal, int on)
92{
93 sigset_t sigset, old;
94
95 sigemptyset(&sigset);
96 sigaddset(&sigset, signal);
97 sigprocmask(on ? SIG_UNBLOCK : SIG_BLOCK, &sigset, &old);
98 return(!sigismember(&old, signal));
99}
100
101/* Both here and in set/get_signal we don't touch SIGPROF, because we must not
102 * disable profiling; it's safe because the profiling code does not interact
103 * with the kernel code at all.*/
104
105static void change_signals(int type)
106{
107 sigset_t mask;
108
109 sigemptyset(&mask);
110 sigaddset(&mask, SIGVTALRM);
111 sigaddset(&mask, SIGALRM);
112 sigaddset(&mask, SIGIO);
113 if(sigprocmask(type, &mask, NULL) < 0)
114 panic("Failed to change signal mask - errno = %d", errno);
115}
116
117void block_signals(void)
118{
119 change_signals(SIG_BLOCK);
120}
121
122void unblock_signals(void)
123{
124 change_signals(SIG_UNBLOCK);
125}
126
127/* These are the asynchronous signals. SIGVTALRM and SIGARLM are handled
128 * together under SIGVTALRM_BIT. SIGPROF is excluded because we want to
129 * be able to profile all of UML, not just the non-critical sections. If
130 * profiling is not thread-safe, then that is not my problem. We can disable
131 * profiling when SMP is enabled in that case.
48 */ 132 */
133#define SIGIO_BIT 0
134#define SIGVTALRM_BIT 1
135
136static int enable_mask(sigset_t *mask)
137{
138 int sigs;
139
140 sigs = sigismember(mask, SIGIO) ? 0 : 1 << SIGIO_BIT;
141 sigs |= sigismember(mask, SIGVTALRM) ? 0 : 1 << SIGVTALRM_BIT;
142 sigs |= sigismember(mask, SIGALRM) ? 0 : 1 << SIGVTALRM_BIT;
143 return(sigs);
144}
145
146int get_signals(void)
147{
148 sigset_t mask;
149
150 if(sigprocmask(SIG_SETMASK, NULL, &mask) < 0)
151 panic("Failed to get signal mask");
152 return(enable_mask(&mask));
153}
154
155int set_signals(int enable)
156{
157 sigset_t mask;
158 int ret;
159
160 sigemptyset(&mask);
161 if(enable & (1 << SIGIO_BIT))
162 sigaddset(&mask, SIGIO);
163 if(enable & (1 << SIGVTALRM_BIT)){
164 sigaddset(&mask, SIGVTALRM);
165 sigaddset(&mask, SIGALRM);
166 }
167
168 /* This is safe - sigprocmask is guaranteed to copy locally the
169 * value of new_set, do his work and then, at the end, write to
170 * old_set.
171 */
172 if(sigprocmask(SIG_UNBLOCK, &mask, &mask) < 0)
173 panic("Failed to enable signals");
174 ret = enable_mask(&mask);
175 sigemptyset(&mask);
176 if((enable & (1 << SIGIO_BIT)) == 0)
177 sigaddset(&mask, SIGIO);
178 if((enable & (1 << SIGVTALRM_BIT)) == 0){
179 sigaddset(&mask, SIGVTALRM);
180 sigaddset(&mask, SIGALRM);
181 }
182 if(sigprocmask(SIG_BLOCK, &mask, NULL) < 0)
183 panic("Failed to block signals");
184
185 return(ret);
186}
diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c
index 29a9e3f4376..b47e5e71d1a 100644
--- a/arch/um/os-Linux/start_up.c
+++ b/arch/um/os-Linux/start_up.c
@@ -24,7 +24,6 @@
24#include "kern_util.h" 24#include "kern_util.h"
25#include "user.h" 25#include "user.h"
26#include "signal_kern.h" 26#include "signal_kern.h"
27#include "signal_user.h"
28#include "sysdep/ptrace.h" 27#include "sysdep/ptrace.h"
29#include "sysdep/sigcontext.h" 28#include "sysdep/sigcontext.h"
30#include "irq_user.h" 29#include "irq_user.h"
diff --git a/arch/um/os-Linux/tt.c b/arch/um/os-Linux/tt.c
index a6db8877931..37828e5b352 100644
--- a/arch/um/os-Linux/tt.c
+++ b/arch/um/os-Linux/tt.c
@@ -23,7 +23,6 @@
23#include "kern_util.h" 23#include "kern_util.h"
24#include "user.h" 24#include "user.h"
25#include "signal_kern.h" 25#include "signal_kern.h"
26#include "signal_user.h"
27#include "sysdep/ptrace.h" 26#include "sysdep/ptrace.h"
28#include "sysdep/sigcontext.h" 27#include "sysdep/sigcontext.h"
29#include "irq_user.h" 28#include "irq_user.h"
diff --git a/arch/um/sys-i386/signal.c b/arch/um/sys-i386/signal.c
index 16bc19928b3..7cd1a82dc8c 100644
--- a/arch/um/sys-i386/signal.c
+++ b/arch/um/sys-i386/signal.c
@@ -10,7 +10,6 @@
10#include "asm/uaccess.h" 10#include "asm/uaccess.h"
11#include "asm/unistd.h" 11#include "asm/unistd.h"
12#include "frame_kern.h" 12#include "frame_kern.h"
13#include "signal_user.h"
14#include "sigcontext.h" 13#include "sigcontext.h"
15#include "registers.h" 14#include "registers.h"
16#include "mode.h" 15#include "mode.h"
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-19 01:34:42 -0400