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-rw-r--r--arch/x86/boot/compressed/relocs.c87
-rw-r--r--arch/x86/include/asm/swiotlb.h8
-rw-r--r--arch/x86/include/asm/syscalls.h32
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce-inject.c22
-rw-r--r--arch/x86/kernel/entry_32.S69
-rw-r--r--arch/x86/kernel/entry_64.S49
-rw-r--r--arch/x86/kernel/ioport.c28
-rw-r--r--arch/x86/kernel/msr.c5
-rw-r--r--arch/x86/kernel/pci-dma.c9
-rw-r--r--arch/x86/kernel/pci-swiotlb.c11
-rw-r--r--arch/x86/kernel/process.c70
-rw-r--r--arch/x86/kernel/process_32.c73
-rw-r--r--arch/x86/kernel/process_64.c35
-rw-r--r--arch/x86/kernel/signal.c12
-rw-r--r--arch/x86/kernel/vm86_32.c11
-rw-r--r--arch/x86/kernel/vmlinux.lds.S4
-rw-r--r--arch/x86/kernel/x8664_ksyms_64.c2
-rw-r--r--arch/x86/tools/gen-insn-attr-x86.awk10
18 files changed, 244 insertions, 293 deletions
diff --git a/arch/x86/boot/compressed/relocs.c b/arch/x86/boot/compressed/relocs.c
index bbeb0c3fbd90..89bbf4e4d05d 100644
--- a/arch/x86/boot/compressed/relocs.c
+++ b/arch/x86/boot/compressed/relocs.c
@@ -9,6 +9,9 @@
9#include <byteswap.h> 9#include <byteswap.h>
10#define USE_BSD 10#define USE_BSD
11#include <endian.h> 11#include <endian.h>
12#include <regex.h>
13
14static void die(char *fmt, ...);
12 15
13#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) 16#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
14static Elf32_Ehdr ehdr; 17static Elf32_Ehdr ehdr;
@@ -30,25 +33,47 @@ static struct section *secs;
30 * the address for which it has been compiled. Don't warn user about 33 * the address for which it has been compiled. Don't warn user about
31 * absolute relocations present w.r.t these symbols. 34 * absolute relocations present w.r.t these symbols.
32 */ 35 */
33static const char* safe_abs_relocs[] = { 36static const char abs_sym_regex[] =
34 "xen_irq_disable_direct_reloc", 37 "^(xen_irq_disable_direct_reloc$|"
35 "xen_save_fl_direct_reloc", 38 "xen_save_fl_direct_reloc$|"
36}; 39 "VDSO|"
40 "__crc_)";
41static regex_t abs_sym_regex_c;
42static int is_abs_reloc(const char *sym_name)
43{
44 return !regexec(&abs_sym_regex_c, sym_name, 0, NULL, 0);
45}
37 46
38static int is_safe_abs_reloc(const char* sym_name) 47/*
48 * These symbols are known to be relative, even if the linker marks them
49 * as absolute (typically defined outside any section in the linker script.)
50 */
51static const char rel_sym_regex[] =
52 "^_end$";
53static regex_t rel_sym_regex_c;
54static int is_rel_reloc(const char *sym_name)
39{ 55{
40 int i; 56 return !regexec(&rel_sym_regex_c, sym_name, 0, NULL, 0);
57}
41 58
42 for (i = 0; i < ARRAY_SIZE(safe_abs_relocs); i++) { 59static void regex_init(void)
43 if (!strcmp(sym_name, safe_abs_relocs[i])) 60{
44 /* Match found */ 61 char errbuf[128];
45 return 1; 62 int err;
46 } 63
47 if (strncmp(sym_name, "VDSO", 4) == 0) 64 err = regcomp(&abs_sym_regex_c, abs_sym_regex,
48 return 1; 65 REG_EXTENDED|REG_NOSUB);
49 if (strncmp(sym_name, "__crc_", 6) == 0) 66 if (err) {
50 return 1; 67 regerror(err, &abs_sym_regex_c, errbuf, sizeof errbuf);
51 return 0; 68 die("%s", errbuf);
69 }
70
71 err = regcomp(&rel_sym_regex_c, rel_sym_regex,
72 REG_EXTENDED|REG_NOSUB);
73 if (err) {
74 regerror(err, &rel_sym_regex_c, errbuf, sizeof errbuf);
75 die("%s", errbuf);
76 }
52} 77}
53 78
54static void die(char *fmt, ...) 79static void die(char *fmt, ...)
@@ -131,7 +156,7 @@ static const char *rel_type(unsigned type)
131#undef REL_TYPE 156#undef REL_TYPE
132 }; 157 };
133 const char *name = "unknown type rel type name"; 158 const char *name = "unknown type rel type name";
134 if (type < ARRAY_SIZE(type_name)) { 159 if (type < ARRAY_SIZE(type_name) && type_name[type]) {
135 name = type_name[type]; 160 name = type_name[type];
136 } 161 }
137 return name; 162 return name;
@@ -448,7 +473,7 @@ static void print_absolute_relocs(void)
448 * Before warning check if this absolute symbol 473 * Before warning check if this absolute symbol
449 * relocation is harmless. 474 * relocation is harmless.
450 */ 475 */
451 if (is_safe_abs_reloc(name)) 476 if (is_abs_reloc(name) || is_rel_reloc(name))
452 continue; 477 continue;
453 478
454 if (!printed) { 479 if (!printed) {
@@ -501,21 +526,26 @@ static void walk_relocs(void (*visit)(Elf32_Rel *rel, Elf32_Sym *sym))
501 sym = &sh_symtab[ELF32_R_SYM(rel->r_info)]; 526 sym = &sh_symtab[ELF32_R_SYM(rel->r_info)];
502 r_type = ELF32_R_TYPE(rel->r_info); 527 r_type = ELF32_R_TYPE(rel->r_info);
503 /* Don't visit relocations to absolute symbols */ 528 /* Don't visit relocations to absolute symbols */
504 if (sym->st_shndx == SHN_ABS) { 529 if (sym->st_shndx == SHN_ABS &&
530 !is_rel_reloc(sym_name(sym_strtab, sym))) {
505 continue; 531 continue;
506 } 532 }
507 if (r_type == R_386_NONE || r_type == R_386_PC32) { 533 switch (r_type) {
534 case R_386_NONE:
535 case R_386_PC32:
508 /* 536 /*
509 * NONE can be ignored and and PC relative 537 * NONE can be ignored and and PC relative
510 * relocations don't need to be adjusted. 538 * relocations don't need to be adjusted.
511 */ 539 */
512 } 540 break;
513 else if (r_type == R_386_32) { 541 case R_386_32:
514 /* Visit relocations that need to be adjusted */ 542 /* Visit relocations that need to be adjusted */
515 visit(rel, sym); 543 visit(rel, sym);
516 } 544 break;
517 else { 545 default:
518 die("Unsupported relocation type: %d\n", r_type); 546 die("Unsupported relocation type: %s (%d)\n",
547 rel_type(r_type), r_type);
548 break;
519 } 549 }
520 } 550 }
521 } 551 }
@@ -571,16 +601,15 @@ static void emit_relocs(int as_text)
571 } 601 }
572 else { 602 else {
573 unsigned char buf[4]; 603 unsigned char buf[4];
574 buf[0] = buf[1] = buf[2] = buf[3] = 0;
575 /* Print a stop */ 604 /* Print a stop */
576 printf("%c%c%c%c", buf[0], buf[1], buf[2], buf[3]); 605 fwrite("\0\0\0\0", 4, 1, stdout);
577 /* Now print each relocation */ 606 /* Now print each relocation */
578 for (i = 0; i < reloc_count; i++) { 607 for (i = 0; i < reloc_count; i++) {
579 buf[0] = (relocs[i] >> 0) & 0xff; 608 buf[0] = (relocs[i] >> 0) & 0xff;
580 buf[1] = (relocs[i] >> 8) & 0xff; 609 buf[1] = (relocs[i] >> 8) & 0xff;
581 buf[2] = (relocs[i] >> 16) & 0xff; 610 buf[2] = (relocs[i] >> 16) & 0xff;
582 buf[3] = (relocs[i] >> 24) & 0xff; 611 buf[3] = (relocs[i] >> 24) & 0xff;
583 printf("%c%c%c%c", buf[0], buf[1], buf[2], buf[3]); 612 fwrite(buf, 4, 1, stdout);
584 } 613 }
585 } 614 }
586} 615}
@@ -598,6 +627,8 @@ int main(int argc, char **argv)
598 FILE *fp; 627 FILE *fp;
599 int i; 628 int i;
600 629
630 regex_init();
631
601 show_absolute_syms = 0; 632 show_absolute_syms = 0;
602 show_absolute_relocs = 0; 633 show_absolute_relocs = 0;
603 as_text = 0; 634 as_text = 0;
diff --git a/arch/x86/include/asm/swiotlb.h b/arch/x86/include/asm/swiotlb.h
index 87ffcb12a1b8..8085277e1b8b 100644
--- a/arch/x86/include/asm/swiotlb.h
+++ b/arch/x86/include/asm/swiotlb.h
@@ -5,13 +5,17 @@
5 5
6#ifdef CONFIG_SWIOTLB 6#ifdef CONFIG_SWIOTLB
7extern int swiotlb; 7extern int swiotlb;
8extern int pci_swiotlb_init(void); 8extern int __init pci_swiotlb_detect(void);
9extern void __init pci_swiotlb_init(void);
9#else 10#else
10#define swiotlb 0 11#define swiotlb 0
11static inline int pci_swiotlb_init(void) 12static inline int pci_swiotlb_detect(void)
12{ 13{
13 return 0; 14 return 0;
14} 15}
16static inline void pci_swiotlb_init(void)
17{
18}
15#endif 19#endif
16 20
17static inline void dma_mark_clean(void *addr, size_t size) {} 21static inline void dma_mark_clean(void *addr, size_t size) {}
diff --git a/arch/x86/include/asm/syscalls.h b/arch/x86/include/asm/syscalls.h
index 1bb6e395881c..8868b9420b0e 100644
--- a/arch/x86/include/asm/syscalls.h
+++ b/arch/x86/include/asm/syscalls.h
@@ -18,16 +18,24 @@
18/* Common in X86_32 and X86_64 */ 18/* Common in X86_32 and X86_64 */
19/* kernel/ioport.c */ 19/* kernel/ioport.c */
20asmlinkage long sys_ioperm(unsigned long, unsigned long, int); 20asmlinkage long sys_ioperm(unsigned long, unsigned long, int);
21long sys_iopl(unsigned int, struct pt_regs *);
21 22
22/* kernel/process.c */ 23/* kernel/process.c */
23int sys_fork(struct pt_regs *); 24int sys_fork(struct pt_regs *);
24int sys_vfork(struct pt_regs *); 25int sys_vfork(struct pt_regs *);
26long sys_execve(char __user *, char __user * __user *,
27 char __user * __user *, struct pt_regs *);
28long sys_clone(unsigned long, unsigned long, void __user *,
29 void __user *, struct pt_regs *);
25 30
26/* kernel/ldt.c */ 31/* kernel/ldt.c */
27asmlinkage int sys_modify_ldt(int, void __user *, unsigned long); 32asmlinkage int sys_modify_ldt(int, void __user *, unsigned long);
28 33
29/* kernel/signal.c */ 34/* kernel/signal.c */
30long sys_rt_sigreturn(struct pt_regs *); 35long sys_rt_sigreturn(struct pt_regs *);
36long sys_sigaltstack(const stack_t __user *, stack_t __user *,
37 struct pt_regs *);
38
31 39
32/* kernel/tls.c */ 40/* kernel/tls.c */
33asmlinkage int sys_set_thread_area(struct user_desc __user *); 41asmlinkage int sys_set_thread_area(struct user_desc __user *);
@@ -35,18 +43,11 @@ asmlinkage int sys_get_thread_area(struct user_desc __user *);
35 43
36/* X86_32 only */ 44/* X86_32 only */
37#ifdef CONFIG_X86_32 45#ifdef CONFIG_X86_32
38/* kernel/ioport.c */
39long sys_iopl(struct pt_regs *);
40
41/* kernel/process_32.c */
42int sys_clone(struct pt_regs *);
43int sys_execve(struct pt_regs *);
44 46
45/* kernel/signal.c */ 47/* kernel/signal.c */
46asmlinkage int sys_sigsuspend(int, int, old_sigset_t); 48asmlinkage int sys_sigsuspend(int, int, old_sigset_t);
47asmlinkage int sys_sigaction(int, const struct old_sigaction __user *, 49asmlinkage int sys_sigaction(int, const struct old_sigaction __user *,
48 struct old_sigaction __user *); 50 struct old_sigaction __user *);
49int sys_sigaltstack(struct pt_regs *);
50unsigned long sys_sigreturn(struct pt_regs *); 51unsigned long sys_sigreturn(struct pt_regs *);
51 52
52/* kernel/sys_i386_32.c */ 53/* kernel/sys_i386_32.c */
@@ -62,28 +63,15 @@ asmlinkage int sys_uname(struct old_utsname __user *);
62asmlinkage int sys_olduname(struct oldold_utsname __user *); 63asmlinkage int sys_olduname(struct oldold_utsname __user *);
63 64
64/* kernel/vm86_32.c */ 65/* kernel/vm86_32.c */
65int sys_vm86old(struct pt_regs *); 66int sys_vm86old(struct vm86_struct __user *, struct pt_regs *);
66int sys_vm86(struct pt_regs *); 67int sys_vm86(unsigned long, unsigned long, struct pt_regs *);
67 68
68#else /* CONFIG_X86_32 */ 69#else /* CONFIG_X86_32 */
69 70
70/* X86_64 only */ 71/* X86_64 only */
71/* kernel/ioport.c */
72asmlinkage long sys_iopl(unsigned int, struct pt_regs *);
73
74/* kernel/process_64.c */ 72/* kernel/process_64.c */
75asmlinkage long sys_clone(unsigned long, unsigned long,
76 void __user *, void __user *,
77 struct pt_regs *);
78asmlinkage long sys_execve(char __user *, char __user * __user *,
79 char __user * __user *,
80 struct pt_regs *);
81long sys_arch_prctl(int, unsigned long); 73long sys_arch_prctl(int, unsigned long);
82 74
83/* kernel/signal.c */
84asmlinkage long sys_sigaltstack(const stack_t __user *, stack_t __user *,
85 struct pt_regs *);
86
87/* kernel/sys_x86_64.c */ 75/* kernel/sys_x86_64.c */
88struct new_utsname; 76struct new_utsname;
89 77
diff --git a/arch/x86/kernel/cpu/mcheck/mce-inject.c b/arch/x86/kernel/cpu/mcheck/mce-inject.c
index 472763d92098..73734baa50f2 100644
--- a/arch/x86/kernel/cpu/mcheck/mce-inject.c
+++ b/arch/x86/kernel/cpu/mcheck/mce-inject.c
@@ -74,7 +74,7 @@ static void raise_exception(struct mce *m, struct pt_regs *pregs)
74 m->finished = 0; 74 m->finished = 0;
75} 75}
76 76
77static cpumask_t mce_inject_cpumask; 77static cpumask_var_t mce_inject_cpumask;
78 78
79static int mce_raise_notify(struct notifier_block *self, 79static int mce_raise_notify(struct notifier_block *self,
80 unsigned long val, void *data) 80 unsigned long val, void *data)
@@ -82,9 +82,9 @@ static int mce_raise_notify(struct notifier_block *self,
82 struct die_args *args = (struct die_args *)data; 82 struct die_args *args = (struct die_args *)data;
83 int cpu = smp_processor_id(); 83 int cpu = smp_processor_id();
84 struct mce *m = &__get_cpu_var(injectm); 84 struct mce *m = &__get_cpu_var(injectm);
85 if (val != DIE_NMI_IPI || !cpu_isset(cpu, mce_inject_cpumask)) 85 if (val != DIE_NMI_IPI || !cpumask_test_cpu(cpu, mce_inject_cpumask))
86 return NOTIFY_DONE; 86 return NOTIFY_DONE;
87 cpu_clear(cpu, mce_inject_cpumask); 87 cpumask_clear_cpu(cpu, mce_inject_cpumask);
88 if (m->inject_flags & MCJ_EXCEPTION) 88 if (m->inject_flags & MCJ_EXCEPTION)
89 raise_exception(m, args->regs); 89 raise_exception(m, args->regs);
90 else if (m->status) 90 else if (m->status)
@@ -148,22 +148,22 @@ static void raise_mce(struct mce *m)
148 unsigned long start; 148 unsigned long start;
149 int cpu; 149 int cpu;
150 get_online_cpus(); 150 get_online_cpus();
151 mce_inject_cpumask = cpu_online_map; 151 cpumask_copy(mce_inject_cpumask, cpu_online_mask);
152 cpu_clear(get_cpu(), mce_inject_cpumask); 152 cpumask_clear_cpu(get_cpu(), mce_inject_cpumask);
153 for_each_online_cpu(cpu) { 153 for_each_online_cpu(cpu) {
154 struct mce *mcpu = &per_cpu(injectm, cpu); 154 struct mce *mcpu = &per_cpu(injectm, cpu);
155 if (!mcpu->finished || 155 if (!mcpu->finished ||
156 MCJ_CTX(mcpu->inject_flags) != MCJ_CTX_RANDOM) 156 MCJ_CTX(mcpu->inject_flags) != MCJ_CTX_RANDOM)
157 cpu_clear(cpu, mce_inject_cpumask); 157 cpumask_clear_cpu(cpu, mce_inject_cpumask);
158 } 158 }
159 if (!cpus_empty(mce_inject_cpumask)) 159 if (!cpumask_empty(mce_inject_cpumask))
160 apic->send_IPI_mask(&mce_inject_cpumask, NMI_VECTOR); 160 apic->send_IPI_mask(mce_inject_cpumask, NMI_VECTOR);
161 start = jiffies; 161 start = jiffies;
162 while (!cpus_empty(mce_inject_cpumask)) { 162 while (!cpumask_empty(mce_inject_cpumask)) {
163 if (!time_before(jiffies, start + 2*HZ)) { 163 if (!time_before(jiffies, start + 2*HZ)) {
164 printk(KERN_ERR 164 printk(KERN_ERR
165 "Timeout waiting for mce inject NMI %lx\n", 165 "Timeout waiting for mce inject NMI %lx\n",
166 *cpus_addr(mce_inject_cpumask)); 166 *cpumask_bits(mce_inject_cpumask));
167 break; 167 break;
168 } 168 }
169 cpu_relax(); 169 cpu_relax();
@@ -210,6 +210,8 @@ static ssize_t mce_write(struct file *filp, const char __user *ubuf,
210 210
211static int inject_init(void) 211static int inject_init(void)
212{ 212{
213 if (!alloc_cpumask_var(&mce_inject_cpumask, GFP_KERNEL))
214 return -ENOMEM;
213 printk(KERN_INFO "Machine check injector initialized\n"); 215 printk(KERN_INFO "Machine check injector initialized\n");
214 mce_chrdev_ops.write = mce_write; 216 mce_chrdev_ops.write = mce_write;
215 register_die_notifier(&mce_raise_nb); 217 register_die_notifier(&mce_raise_nb);
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 50b9c220e121..44a8e0dc6737 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -725,22 +725,61 @@ END(syscall_badsys)
725/* 725/*
726 * System calls that need a pt_regs pointer. 726 * System calls that need a pt_regs pointer.
727 */ 727 */
728#define PTREGSCALL(name) \ 728#define PTREGSCALL0(name) \
729 ALIGN; \ 729 ALIGN; \
730ptregs_##name: \ 730ptregs_##name: \
731 leal 4(%esp),%eax; \ 731 leal 4(%esp),%eax; \
732 jmp sys_##name; 732 jmp sys_##name;
733 733
734PTREGSCALL(iopl) 734#define PTREGSCALL1(name) \
735PTREGSCALL(fork) 735 ALIGN; \
736PTREGSCALL(clone) 736ptregs_##name: \
737PTREGSCALL(vfork) 737 leal 4(%esp),%edx; \
738PTREGSCALL(execve) 738 movl (PT_EBX+4)(%esp),%eax; \
739PTREGSCALL(sigaltstack) 739 jmp sys_##name;
740PTREGSCALL(sigreturn) 740
741PTREGSCALL(rt_sigreturn) 741#define PTREGSCALL2(name) \
742PTREGSCALL(vm86) 742 ALIGN; \
743PTREGSCALL(vm86old) 743ptregs_##name: \
744 leal 4(%esp),%ecx; \
745 movl (PT_ECX+4)(%esp),%edx; \
746 movl (PT_EBX+4)(%esp),%eax; \
747 jmp sys_##name;
748
749#define PTREGSCALL3(name) \
750 ALIGN; \
751ptregs_##name: \
752 leal 4(%esp),%eax; \
753 pushl %eax; \
754 movl PT_EDX(%eax),%ecx; \
755 movl PT_ECX(%eax),%edx; \
756 movl PT_EBX(%eax),%eax; \
757 call sys_##name; \
758 addl $4,%esp; \
759 ret
760
761PTREGSCALL1(iopl)
762PTREGSCALL0(fork)
763PTREGSCALL0(vfork)
764PTREGSCALL3(execve)
765PTREGSCALL2(sigaltstack)
766PTREGSCALL0(sigreturn)
767PTREGSCALL0(rt_sigreturn)
768PTREGSCALL2(vm86)
769PTREGSCALL1(vm86old)
770
771/* Clone is an oddball. The 4th arg is in %edi */
772 ALIGN;
773ptregs_clone:
774 leal 4(%esp),%eax
775 pushl %eax
776 pushl PT_EDI(%eax)
777 movl PT_EDX(%eax),%ecx
778 movl PT_ECX(%eax),%edx
779 movl PT_EBX(%eax),%eax
780 call sys_clone
781 addl $8,%esp
782 ret
744 783
745.macro FIXUP_ESPFIX_STACK 784.macro FIXUP_ESPFIX_STACK
746/* 785/*
@@ -1008,12 +1047,8 @@ END(spurious_interrupt_bug)
1008ENTRY(kernel_thread_helper) 1047ENTRY(kernel_thread_helper)
1009 pushl $0 # fake return address for unwinder 1048 pushl $0 # fake return address for unwinder
1010 CFI_STARTPROC 1049 CFI_STARTPROC
1011 movl %edx,%eax 1050 movl %edi,%eax
1012 push %edx 1051 call *%esi
1013 CFI_ADJUST_CFA_OFFSET 4
1014 call *%ebx
1015 push %eax
1016 CFI_ADJUST_CFA_OFFSET 4
1017 call do_exit 1052 call do_exit
1018 ud2 # padding for call trace 1053 ud2 # padding for call trace
1019 CFI_ENDPROC 1054 CFI_ENDPROC
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 673f693fb451..0697ff139837 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -1166,63 +1166,20 @@ bad_gs:
1166 jmp 2b 1166 jmp 2b
1167 .previous 1167 .previous
1168 1168
1169/* 1169ENTRY(kernel_thread_helper)
1170 * Create a kernel thread.
1171 *
1172 * C extern interface:
1173 * extern long kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
1174 *
1175 * asm input arguments:
1176 * rdi: fn, rsi: arg, rdx: flags
1177 */
1178ENTRY(kernel_thread)
1179 CFI_STARTPROC
1180 FAKE_STACK_FRAME $child_rip
1181 SAVE_ALL
1182
1183 # rdi: flags, rsi: usp, rdx: will be &pt_regs
1184 movq %rdx,%rdi
1185 orq kernel_thread_flags(%rip),%rdi
1186 movq $-1, %rsi
1187 movq %rsp, %rdx
1188
1189 xorl %r8d,%r8d
1190 xorl %r9d,%r9d
1191
1192 # clone now
1193 call do_fork
1194 movq %rax,RAX(%rsp)
1195 xorl %edi,%edi
1196
1197 /*
1198 * It isn't worth to check for reschedule here,
1199 * so internally to the x86_64 port you can rely on kernel_thread()
1200 * not to reschedule the child before returning, this avoids the need
1201 * of hacks for example to fork off the per-CPU idle tasks.
1202 * [Hopefully no generic code relies on the reschedule -AK]
1203 */
1204 RESTORE_ALL
1205 UNFAKE_STACK_FRAME
1206 ret
1207 CFI_ENDPROC
1208END(kernel_thread)
1209
1210ENTRY(child_rip)
1211 pushq $0 # fake return address 1170 pushq $0 # fake return address
1212 CFI_STARTPROC 1171 CFI_STARTPROC
1213 /* 1172 /*
1214 * Here we are in the child and the registers are set as they were 1173 * Here we are in the child and the registers are set as they were
1215 * at kernel_thread() invocation in the parent. 1174 * at kernel_thread() invocation in the parent.
1216 */ 1175 */
1217 movq %rdi, %rax 1176 call *%rsi
1218 movq %rsi, %rdi
1219 call *%rax
1220 # exit 1177 # exit
1221 mov %eax, %edi 1178 mov %eax, %edi
1222 call do_exit 1179 call do_exit
1223 ud2 # padding for call trace 1180 ud2 # padding for call trace
1224 CFI_ENDPROC 1181 CFI_ENDPROC
1225END(child_rip) 1182END(kernel_thread_helper)
1226 1183
1227/* 1184/*
1228 * execve(). This function needs to use IRET, not SYSRET, to set up all state properly. 1185 * execve(). This function needs to use IRET, not SYSRET, to set up all state properly.
diff --git a/arch/x86/kernel/ioport.c b/arch/x86/kernel/ioport.c
index 99c4d308f16b..8eec0ec59af2 100644
--- a/arch/x86/kernel/ioport.c
+++ b/arch/x86/kernel/ioport.c
@@ -103,9 +103,10 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
103 * on system-call entry - see also fork() and the signal handling 103 * on system-call entry - see also fork() and the signal handling
104 * code. 104 * code.
105 */ 105 */
106static int do_iopl(unsigned int level, struct pt_regs *regs) 106long sys_iopl(unsigned int level, struct pt_regs *regs)
107{ 107{
108 unsigned int old = (regs->flags >> 12) & 3; 108 unsigned int old = (regs->flags >> 12) & 3;
109 struct thread_struct *t = &current->thread;
109 110
110 if (level > 3) 111 if (level > 3)
111 return -EINVAL; 112 return -EINVAL;
@@ -115,29 +116,8 @@ static int do_iopl(unsigned int level, struct pt_regs *regs)
115 return -EPERM; 116 return -EPERM;
116 } 117 }
117 regs->flags = (regs->flags & ~X86_EFLAGS_IOPL) | (level << 12); 118 regs->flags = (regs->flags & ~X86_EFLAGS_IOPL) | (level << 12);
118
119 return 0;
120}
121
122#ifdef CONFIG_X86_32
123long sys_iopl(struct pt_regs *regs)
124{
125 unsigned int level = regs->bx;
126 struct thread_struct *t = &current->thread;
127 int rc;
128
129 rc = do_iopl(level, regs);
130 if (rc < 0)
131 goto out;
132
133 t->iopl = level << 12; 119 t->iopl = level << 12;
134 set_iopl_mask(t->iopl); 120 set_iopl_mask(t->iopl);
135out: 121
136 return rc; 122 return 0;
137}
138#else
139asmlinkage long sys_iopl(unsigned int level, struct pt_regs *regs)
140{
141 return do_iopl(level, regs);
142} 123}
143#endif
diff --git a/arch/x86/kernel/msr.c b/arch/x86/kernel/msr.c
index 553449951b84..572b07eee3f4 100644
--- a/arch/x86/kernel/msr.c
+++ b/arch/x86/kernel/msr.c
@@ -172,11 +172,10 @@ static long msr_ioctl(struct file *file, unsigned int ioc, unsigned long arg)
172 172
173static int msr_open(struct inode *inode, struct file *file) 173static int msr_open(struct inode *inode, struct file *file)
174{ 174{
175 unsigned int cpu = iminor(file->f_path.dentry->d_inode); 175 unsigned int cpu;
176 struct cpuinfo_x86 *c = &cpu_data(cpu); 176 struct cpuinfo_x86 *c;
177 177
178 cpu = iminor(file->f_path.dentry->d_inode); 178 cpu = iminor(file->f_path.dentry->d_inode);
179
180 if (cpu >= nr_cpu_ids || !cpu_online(cpu)) 179 if (cpu >= nr_cpu_ids || !cpu_online(cpu))
181 return -ENXIO; /* No such CPU */ 180 return -ENXIO; /* No such CPU */
182 181
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index fcc2f2bfa39c..75e14e21f61a 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -120,15 +120,12 @@ static void __init dma32_free_bootmem(void)
120 120
121void __init pci_iommu_alloc(void) 121void __init pci_iommu_alloc(void)
122{ 122{
123 int use_swiotlb;
124
125 use_swiotlb = pci_swiotlb_init();
126#ifdef CONFIG_X86_64 123#ifdef CONFIG_X86_64
127 /* free the range so iommu could get some range less than 4G */ 124 /* free the range so iommu could get some range less than 4G */
128 dma32_free_bootmem(); 125 dma32_free_bootmem();
129#endif 126#endif
130 if (use_swiotlb) 127 if (pci_swiotlb_detect())
131 return; 128 goto out;
132 129
133 gart_iommu_hole_init(); 130 gart_iommu_hole_init();
134 131
@@ -138,6 +135,8 @@ void __init pci_iommu_alloc(void)
138 135
139 /* needs to be called after gart_iommu_hole_init */ 136 /* needs to be called after gart_iommu_hole_init */
140 amd_iommu_detect(); 137 amd_iommu_detect();
138out:
139 pci_swiotlb_init();
141} 140}
142 141
143void *dma_generic_alloc_coherent(struct device *dev, size_t size, 142void *dma_generic_alloc_coherent(struct device *dev, size_t size,
diff --git a/arch/x86/kernel/pci-swiotlb.c b/arch/x86/kernel/pci-swiotlb.c
index e3c0a66b9e77..7d2829dde20e 100644
--- a/arch/x86/kernel/pci-swiotlb.c
+++ b/arch/x86/kernel/pci-swiotlb.c
@@ -43,12 +43,12 @@ static struct dma_map_ops swiotlb_dma_ops = {
43}; 43};
44 44
45/* 45/*
46 * pci_swiotlb_init - initialize swiotlb if necessary 46 * pci_swiotlb_detect - set swiotlb to 1 if necessary
47 * 47 *
48 * This returns non-zero if we are forced to use swiotlb (by the boot 48 * This returns non-zero if we are forced to use swiotlb (by the boot
49 * option). 49 * option).
50 */ 50 */
51int __init pci_swiotlb_init(void) 51int __init pci_swiotlb_detect(void)
52{ 52{
53 int use_swiotlb = swiotlb | swiotlb_force; 53 int use_swiotlb = swiotlb | swiotlb_force;
54 54
@@ -60,10 +60,13 @@ int __init pci_swiotlb_init(void)
60 if (swiotlb_force) 60 if (swiotlb_force)
61 swiotlb = 1; 61 swiotlb = 1;
62 62
63 return use_swiotlb;
64}
65
66void __init pci_swiotlb_init(void)
67{
63 if (swiotlb) { 68 if (swiotlb) {
64 swiotlb_init(0); 69 swiotlb_init(0);
65 dma_ops = &swiotlb_dma_ops; 70 dma_ops = &swiotlb_dma_ops;
66 } 71 }
67
68 return use_swiotlb;
69} 72}
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 7a7bd4e3ec49..98c2cdeb599e 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -255,6 +255,76 @@ int sys_vfork(struct pt_regs *regs)
255 NULL, NULL); 255 NULL, NULL);
256} 256}
257 257
258long
259sys_clone(unsigned long clone_flags, unsigned long newsp,
260 void __user *parent_tid, void __user *child_tid, struct pt_regs *regs)
261{
262 if (!newsp)
263 newsp = regs->sp;
264 return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
265}
266
267/*
268 * This gets run with %si containing the
269 * function to call, and %di containing
270 * the "args".
271 */
272extern void kernel_thread_helper(void);
273
274/*
275 * Create a kernel thread
276 */
277int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
278{
279 struct pt_regs regs;
280
281 memset(&regs, 0, sizeof(regs));
282
283 regs.si = (unsigned long) fn;
284 regs.di = (unsigned long) arg;
285
286#ifdef CONFIG_X86_32
287 regs.ds = __USER_DS;
288 regs.es = __USER_DS;
289 regs.fs = __KERNEL_PERCPU;
290 regs.gs = __KERNEL_STACK_CANARY;
291#endif
292
293 regs.orig_ax = -1;
294 regs.ip = (unsigned long) kernel_thread_helper;
295 regs.cs = __KERNEL_CS | get_kernel_rpl();
296 regs.flags = X86_EFLAGS_IF | 0x2;
297
298 /* Ok, create the new process.. */
299 return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
300}
301EXPORT_SYMBOL(kernel_thread);
302
303/*
304 * sys_execve() executes a new program.
305 */
306long sys_execve(char __user *name, char __user * __user *argv,
307 char __user * __user *envp, struct pt_regs *regs)
308{
309 long error;
310 char *filename;
311
312 filename = getname(name);
313 error = PTR_ERR(filename);
314 if (IS_ERR(filename))
315 return error;
316 error = do_execve(filename, argv, envp, regs);
317
318#ifdef CONFIG_X86_32
319 if (error == 0) {
320 /* Make sure we don't return using sysenter.. */
321 set_thread_flag(TIF_IRET);
322 }
323#endif
324
325 putname(filename);
326 return error;
327}
258 328
259/* 329/*
260 * Idle related variables and functions 330 * Idle related variables and functions
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 120b88797a75..9c517b5858f0 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -180,39 +180,6 @@ void show_regs(struct pt_regs *regs)
180 show_trace(NULL, regs, &regs->sp, regs->bp); 180 show_trace(NULL, regs, &regs->sp, regs->bp);
181} 181}
182 182
183/*
184 * This gets run with %bx containing the
185 * function to call, and %dx containing
186 * the "args".
187 */
188extern void kernel_thread_helper(void);
189
190/*
191 * Create a kernel thread
192 */
193int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
194{
195 struct pt_regs regs;
196
197 memset(&regs, 0, sizeof(regs));
198
199 regs.bx = (unsigned long) fn;
200 regs.dx = (unsigned long) arg;
201
202 regs.ds = __USER_DS;
203 regs.es = __USER_DS;
204 regs.fs = __KERNEL_PERCPU;
205 regs.gs = __KERNEL_STACK_CANARY;
206 regs.orig_ax = -1;
207 regs.ip = (unsigned long) kernel_thread_helper;
208 regs.cs = __KERNEL_CS | get_kernel_rpl();
209 regs.flags = X86_EFLAGS_IF | X86_EFLAGS_SF | X86_EFLAGS_PF | 0x2;
210
211 /* Ok, create the new process.. */
212 return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
213}
214EXPORT_SYMBOL(kernel_thread);
215
216void release_thread(struct task_struct *dead_task) 183void release_thread(struct task_struct *dead_task)
217{ 184{
218 BUG_ON(dead_task->mm); 185 BUG_ON(dead_task->mm);
@@ -424,46 +391,6 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
424 return prev_p; 391 return prev_p;
425} 392}
426 393
427int sys_clone(struct pt_regs *regs)
428{
429 unsigned long clone_flags;
430 unsigned long newsp;
431 int __user *parent_tidptr, *child_tidptr;
432
433 clone_flags = regs->bx;
434 newsp = regs->cx;
435 parent_tidptr = (int __user *)regs->dx;
436 child_tidptr = (int __user *)regs->di;
437 if (!newsp)
438 newsp = regs->sp;
439 return do_fork(clone_flags, newsp, regs, 0, parent_tidptr, child_tidptr);
440}
441
442/*
443 * sys_execve() executes a new program.
444 */
445int sys_execve(struct pt_regs *regs)
446{
447 int error;
448 char *filename;
449
450 filename = getname((char __user *) regs->bx);
451 error = PTR_ERR(filename);
452 if (IS_ERR(filename))
453 goto out;
454 error = do_execve(filename,
455 (char __user * __user *) regs->cx,
456 (char __user * __user *) regs->dx,
457 regs);
458 if (error == 0) {
459 /* Make sure we don't return using sysenter.. */
460 set_thread_flag(TIF_IRET);
461 }
462 putname(filename);
463out:
464 return error;
465}
466
467#define top_esp (THREAD_SIZE - sizeof(unsigned long)) 394#define top_esp (THREAD_SIZE - sizeof(unsigned long))
468#define top_ebp (THREAD_SIZE - 2*sizeof(unsigned long)) 395#define top_ebp (THREAD_SIZE - 2*sizeof(unsigned long))
469 396
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index e5ab0cd0ef36..52fbd0c60198 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -57,8 +57,6 @@ asmlinkage extern void ret_from_fork(void);
57DEFINE_PER_CPU(unsigned long, old_rsp); 57DEFINE_PER_CPU(unsigned long, old_rsp);
58static DEFINE_PER_CPU(unsigned char, is_idle); 58static DEFINE_PER_CPU(unsigned char, is_idle);
59 59
60unsigned long kernel_thread_flags = CLONE_VM | CLONE_UNTRACED;
61
62static ATOMIC_NOTIFIER_HEAD(idle_notifier); 60static ATOMIC_NOTIFIER_HEAD(idle_notifier);
63 61
64void idle_notifier_register(struct notifier_block *n) 62void idle_notifier_register(struct notifier_block *n)
@@ -273,8 +271,9 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
273 *childregs = *regs; 271 *childregs = *regs;
274 272
275 childregs->ax = 0; 273 childregs->ax = 0;
276 childregs->sp = sp; 274 if (user_mode(regs))
277 if (sp == ~0UL) 275 childregs->sp = sp;
276 else
278 childregs->sp = (unsigned long)childregs; 277 childregs->sp = (unsigned long)childregs;
279 278
280 p->thread.sp = (unsigned long) childregs; 279 p->thread.sp = (unsigned long) childregs;
@@ -508,25 +507,6 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
508 return prev_p; 507 return prev_p;
509} 508}
510 509
511/*
512 * sys_execve() executes a new program.
513 */
514asmlinkage
515long sys_execve(char __user *name, char __user * __user *argv,
516 char __user * __user *envp, struct pt_regs *regs)
517{
518 long error;
519 char *filename;
520
521 filename = getname(name);
522 error = PTR_ERR(filename);
523 if (IS_ERR(filename))
524 return error;
525 error = do_execve(filename, argv, envp, regs);
526 putname(filename);
527 return error;
528}
529
530void set_personality_64bit(void) 510void set_personality_64bit(void)
531{ 511{
532 /* inherit personality from parent */ 512 /* inherit personality from parent */
@@ -541,15 +521,6 @@ void set_personality_64bit(void)
541 current->personality &= ~READ_IMPLIES_EXEC; 521 current->personality &= ~READ_IMPLIES_EXEC;
542} 522}
543 523
544asmlinkage long
545sys_clone(unsigned long clone_flags, unsigned long newsp,
546 void __user *parent_tid, void __user *child_tid, struct pt_regs *regs)
547{
548 if (!newsp)
549 newsp = regs->sp;
550 return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
551}
552
553unsigned long get_wchan(struct task_struct *p) 524unsigned long get_wchan(struct task_struct *p)
554{ 525{
555 unsigned long stack; 526 unsigned long stack;
diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c
index 74fe6d86dc5d..4fd173cd8e57 100644
--- a/arch/x86/kernel/signal.c
+++ b/arch/x86/kernel/signal.c
@@ -545,22 +545,12 @@ sys_sigaction(int sig, const struct old_sigaction __user *act,
545} 545}
546#endif /* CONFIG_X86_32 */ 546#endif /* CONFIG_X86_32 */
547 547
548#ifdef CONFIG_X86_32 548long
549int sys_sigaltstack(struct pt_regs *regs)
550{
551 const stack_t __user *uss = (const stack_t __user *)regs->bx;
552 stack_t __user *uoss = (stack_t __user *)regs->cx;
553
554 return do_sigaltstack(uss, uoss, regs->sp);
555}
556#else /* !CONFIG_X86_32 */
557asmlinkage long
558sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss, 549sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
559 struct pt_regs *regs) 550 struct pt_regs *regs)
560{ 551{
561 return do_sigaltstack(uss, uoss, regs->sp); 552 return do_sigaltstack(uss, uoss, regs->sp);
562} 553}
563#endif /* CONFIG_X86_32 */
564 554
565/* 555/*
566 * Do a signal return; undo the signal stack. 556 * Do a signal return; undo the signal stack.
diff --git a/arch/x86/kernel/vm86_32.c b/arch/x86/kernel/vm86_32.c
index 9c4e62539058..5ffb5622f793 100644
--- a/arch/x86/kernel/vm86_32.c
+++ b/arch/x86/kernel/vm86_32.c
@@ -197,9 +197,8 @@ out:
197static int do_vm86_irq_handling(int subfunction, int irqnumber); 197static int do_vm86_irq_handling(int subfunction, int irqnumber);
198static void do_sys_vm86(struct kernel_vm86_struct *info, struct task_struct *tsk); 198static void do_sys_vm86(struct kernel_vm86_struct *info, struct task_struct *tsk);
199 199
200int sys_vm86old(struct pt_regs *regs) 200int sys_vm86old(struct vm86_struct __user *v86, struct pt_regs *regs)
201{ 201{
202 struct vm86_struct __user *v86 = (struct vm86_struct __user *)regs->bx;
203 struct kernel_vm86_struct info; /* declare this _on top_, 202 struct kernel_vm86_struct info; /* declare this _on top_,
204 * this avoids wasting of stack space. 203 * this avoids wasting of stack space.
205 * This remains on the stack until we 204 * This remains on the stack until we
@@ -227,7 +226,7 @@ out:
227} 226}
228 227
229 228
230int sys_vm86(struct pt_regs *regs) 229int sys_vm86(unsigned long cmd, unsigned long arg, struct pt_regs *regs)
231{ 230{
232 struct kernel_vm86_struct info; /* declare this _on top_, 231 struct kernel_vm86_struct info; /* declare this _on top_,
233 * this avoids wasting of stack space. 232 * this avoids wasting of stack space.
@@ -239,12 +238,12 @@ int sys_vm86(struct pt_regs *regs)
239 struct vm86plus_struct __user *v86; 238 struct vm86plus_struct __user *v86;
240 239
241 tsk = current; 240 tsk = current;
242 switch (regs->bx) { 241 switch (cmd) {
243 case VM86_REQUEST_IRQ: 242 case VM86_REQUEST_IRQ:
244 case VM86_FREE_IRQ: 243 case VM86_FREE_IRQ:
245 case VM86_GET_IRQ_BITS: 244 case VM86_GET_IRQ_BITS:
246 case VM86_GET_AND_RESET_IRQ: 245 case VM86_GET_AND_RESET_IRQ:
247 ret = do_vm86_irq_handling(regs->bx, (int)regs->cx); 246 ret = do_vm86_irq_handling(cmd, (int)arg);
248 goto out; 247 goto out;
249 case VM86_PLUS_INSTALL_CHECK: 248 case VM86_PLUS_INSTALL_CHECK:
250 /* 249 /*
@@ -261,7 +260,7 @@ int sys_vm86(struct pt_regs *regs)
261 ret = -EPERM; 260 ret = -EPERM;
262 if (tsk->thread.saved_sp0) 261 if (tsk->thread.saved_sp0)
263 goto out; 262 goto out;
264 v86 = (struct vm86plus_struct __user *)regs->cx; 263 v86 = (struct vm86plus_struct __user *)arg;
265 tmp = copy_vm86_regs_from_user(&info.regs, &v86->regs, 264 tmp = copy_vm86_regs_from_user(&info.regs, &v86->regs,
266 offsetof(struct kernel_vm86_struct, regs32) - 265 offsetof(struct kernel_vm86_struct, regs32) -
267 sizeof(info.regs)); 266 sizeof(info.regs));
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index f3f2104408d9..f92a0da608cb 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -319,9 +319,7 @@ SECTIONS
319 __brk_limit = .; 319 __brk_limit = .;
320 } 320 }
321 321
322 .end : AT(ADDR(.end) - LOAD_OFFSET) { 322 _end = .;
323 _end = .;
324 }
325 323
326 STABS_DEBUG 324 STABS_DEBUG
327 DWARF_DEBUG 325 DWARF_DEBUG
diff --git a/arch/x86/kernel/x8664_ksyms_64.c b/arch/x86/kernel/x8664_ksyms_64.c
index 084c1adc45f5..619f7f88b8cc 100644
--- a/arch/x86/kernel/x8664_ksyms_64.c
+++ b/arch/x86/kernel/x8664_ksyms_64.c
@@ -17,8 +17,6 @@
17EXPORT_SYMBOL(mcount); 17EXPORT_SYMBOL(mcount);
18#endif 18#endif
19 19
20EXPORT_SYMBOL(kernel_thread);
21
22EXPORT_SYMBOL(__get_user_1); 20EXPORT_SYMBOL(__get_user_1);
23EXPORT_SYMBOL(__get_user_2); 21EXPORT_SYMBOL(__get_user_2);
24EXPORT_SYMBOL(__get_user_4); 22EXPORT_SYMBOL(__get_user_4);
diff --git a/arch/x86/tools/gen-insn-attr-x86.awk b/arch/x86/tools/gen-insn-attr-x86.awk
index e34e92a28eb6..7a6850683c34 100644
--- a/arch/x86/tools/gen-insn-attr-x86.awk
+++ b/arch/x86/tools/gen-insn-attr-x86.awk
@@ -226,12 +226,12 @@ function add_flags(old,new) {
226} 226}
227 227
228# convert operands to flags. 228# convert operands to flags.
229function convert_operands(opnd, i,imm,mod) 229function convert_operands(count,opnd, i,j,imm,mod)
230{ 230{
231 imm = null 231 imm = null
232 mod = null 232 mod = null
233 for (i in opnd) { 233 for (j = 1; j <= count; j++) {
234 i = opnd[i] 234 i = opnd[j]
235 if (match(i, imm_expr) == 1) { 235 if (match(i, imm_expr) == 1) {
236 if (!imm_flag[i]) 236 if (!imm_flag[i])
237 semantic_error("Unknown imm opnd: " i) 237 semantic_error("Unknown imm opnd: " i)
@@ -282,8 +282,8 @@ function convert_operands(opnd, i,imm,mod)
282 # parse one opcode 282 # parse one opcode
283 if (match($i, opnd_expr)) { 283 if (match($i, opnd_expr)) {
284 opnd = $i 284 opnd = $i
285 split($(i++), opnds, ",") 285 count = split($(i++), opnds, ",")
286 flags = convert_operands(opnds) 286 flags = convert_operands(count, opnds)
287 } 287 }
288 if (match($i, ext_expr)) 288 if (match($i, ext_expr))
289 ext = $(i++) 289 ext = $(i++)
generated by cgit v1.2.2 (git 2.25.0) at 2024-09-23 12:22:06 -0400