diff options
Diffstat (limited to 'include/asm-x86/elf.h')
| -rw-r--r-- | include/asm-x86/elf.h | 88 |
1 files changed, 64 insertions, 24 deletions
diff --git a/include/asm-x86/elf.h b/include/asm-x86/elf.h index d6bf7421d7b..dab4744f958 100644 --- a/include/asm-x86/elf.h +++ b/include/asm-x86/elf.h @@ -73,6 +73,9 @@ typedef struct user_fxsr_struct elf_fpxregset_t; #endif #ifdef __KERNEL__ +#include <asm/vdso.h> + +extern unsigned int vdso_enabled; /* * This is used to ensure we don't load something for the wrong architecture. @@ -84,7 +87,6 @@ typedef struct user_fxsr_struct elf_fpxregset_t; #include <asm/processor.h> #include <asm/system.h> /* for savesegment */ #include <asm/desc.h> -#include <asm/vdso.h> #define elf_check_arch(x) elf_check_arch_ia32(x) @@ -106,7 +108,6 @@ typedef struct user_fxsr_struct elf_fpxregset_t; #define ELF_PLATFORM (utsname()->machine) #define set_personality_64bit() do { } while (0) -extern unsigned int vdso_enabled; #else /* CONFIG_X86_32 */ @@ -118,29 +119,57 @@ extern unsigned int vdso_enabled; #define elf_check_arch(x) \ ((x)->e_machine == EM_X86_64) +#define compat_elf_check_arch(x) elf_check_arch_ia32(x) + +static inline void start_ia32_thread(struct pt_regs *regs, u32 ip, u32 sp) +{ + asm volatile("movl %0,%%fs" :: "r" (0)); + asm volatile("movl %0,%%es; movl %0,%%ds" : : "r" (__USER32_DS)); + load_gs_index(0); + regs->ip = ip; + regs->sp = sp; + regs->flags = X86_EFLAGS_IF; + regs->cs = __USER32_CS; + regs->ss = __USER32_DS; +} + +static inline void elf_common_init(struct thread_struct *t, + struct pt_regs *regs, const u16 ds) +{ + regs->ax = regs->bx = regs->cx = regs->dx = 0; + regs->si = regs->di = regs->bp = 0; + regs->r8 = regs->r9 = regs->r10 = regs->r11 = 0; + regs->r12 = regs->r13 = regs->r14 = regs->r15 = 0; + t->fs = t->gs = 0; + t->fsindex = t->gsindex = 0; + t->ds = t->es = ds; +} + #define ELF_PLAT_INIT(_r, load_addr) do { \ - struct task_struct *cur = current; \ - (_r)->bx = 0; (_r)->cx = 0; (_r)->dx = 0; \ - (_r)->si = 0; (_r)->di = 0; (_r)->bp = 0; \ - (_r)->ax = 0; \ - (_r)->r8 = 0; \ - (_r)->r9 = 0; \ - (_r)->r10 = 0; \ - (_r)->r11 = 0; \ - (_r)->r12 = 0; \ - (_r)->r13 = 0; \ - (_r)->r14 = 0; \ - (_r)->r15 = 0; \ - cur->thread.fs = 0; cur->thread.gs = 0; \ - cur->thread.fsindex = 0; cur->thread.gsindex = 0; \ - cur->thread.ds = 0; cur->thread.es = 0; \ + elf_common_init(¤t->thread, _r, 0); \ clear_thread_flag(TIF_IA32); \ } while (0) +#define COMPAT_ELF_PLAT_INIT(regs, load_addr) \ + elf_common_init(¤t->thread, regs, __USER_DS) +#define compat_start_thread(regs, ip, sp) do { \ + start_ia32_thread(regs, ip, sp); \ + set_fs(USER_DS); \ + } while (0) +#define COMPAT_SET_PERSONALITY(ex, ibcs2) do { \ + if (test_thread_flag(TIF_IA32)) \ + clear_thread_flag(TIF_ABI_PENDING); \ + else \ + set_thread_flag(TIF_ABI_PENDING); \ + current->personality |= force_personality32; \ + } while (0) +#define COMPAT_ELF_PLATFORM ("i686") + /* I'm not sure if we can use '-' here */ #define ELF_PLATFORM ("x86_64") extern void set_personality_64bit(void); -extern int vdso_enabled; +extern unsigned int sysctl_vsyscall32; +extern int force_personality32; #endif /* !CONFIG_X86_32 */ @@ -179,17 +208,19 @@ extern int vdso_enabled; struct task_struct; +#define ARCH_DLINFO_IA32(vdso_enabled) \ +do if (vdso_enabled) { \ + NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \ + NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \ +} while (0) + #ifdef CONFIG_X86_32 #define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO)) -/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */ +#define ARCH_DLINFO ARCH_DLINFO_IA32(vdso_enabled) -#define ARCH_DLINFO \ -do if (vdso_enabled) { \ - NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \ - NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \ -} while (0) +/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */ #else /* CONFIG_X86_32 */ @@ -203,6 +234,12 @@ do if (vdso_enabled) { \ NEW_AUX_ENT(AT_SYSINFO_EHDR,(unsigned long)current->mm->context.vdso);\ } while (0) +#define AT_SYSINFO 32 + +#define COMPAT_ARCH_DLINFO ARCH_DLINFO_IA32(sysctl_vsyscall32) + +#define COMPAT_ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000) + #endif /* !CONFIG_X86_32 */ #define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso) @@ -216,6 +253,9 @@ struct linux_binprm; extern int arch_setup_additional_pages(struct linux_binprm *bprm, int executable_stack); +extern int syscall32_setup_pages(struct linux_binprm *, int exstack); +#define compat_arch_setup_additional_pages syscall32_setup_pages + extern unsigned long arch_randomize_brk(struct mm_struct *mm); #define arch_randomize_brk arch_randomize_brk |