diff options
| author | Paul Moore <pmoore@redhat.com> | 2014-06-17 17:30:23 -0400 |
|---|---|---|
| committer | Paul Moore <pmoore@redhat.com> | 2014-06-17 17:30:23 -0400 |
| commit | 170b5910d9fbea79de1bb40df22eda5f98250c0c (patch) | |
| tree | ca9560e878d2842d45c6f99077d0d8b8f8b0f9ba /arch/x86/include/asm/vdso.h | |
| parent | 47dd0b76ace953bd2c0479076db0d3e3b9594003 (diff) | |
| parent | 1860e379875dfe7271c649058aeddffe5afd9d0d (diff) | |
Merge tag 'v3.15' into next
Linux 3.15
Diffstat (limited to 'arch/x86/include/asm/vdso.h')
| -rw-r--r-- | arch/x86/include/asm/vdso.h | 52 |
1 files changed, 42 insertions, 10 deletions
diff --git a/arch/x86/include/asm/vdso.h b/arch/x86/include/asm/vdso.h index fddb53d63915..d1dc55404ff1 100644 --- a/arch/x86/include/asm/vdso.h +++ b/arch/x86/include/asm/vdso.h @@ -1,8 +1,45 @@ #ifndef _ASM_X86_VDSO_H #define _ASM_X86_VDSO_H +#include <asm/page_types.h> +#include <linux/linkage.h> + +#ifdef __ASSEMBLER__ + +#define DEFINE_VDSO_IMAGE(symname, filename) \ +__PAGE_ALIGNED_DATA ; \ + .globl symname##_start, symname##_end ; \ + .align PAGE_SIZE ; \ + symname##_start: ; \ + .incbin filename ; \ + symname##_end: ; \ + .align PAGE_SIZE /* extra data here leaks to userspace. */ ; \ + \ +.previous ; \ + \ + .globl symname##_pages ; \ + .bss ; \ + .align 8 ; \ + .type symname##_pages, @object ; \ + symname##_pages: ; \ + .zero (symname##_end - symname##_start + PAGE_SIZE - 1) / PAGE_SIZE * (BITS_PER_LONG / 8) ; \ + .size symname##_pages, .-symname##_pages + +#else + +#define DECLARE_VDSO_IMAGE(symname) \ + extern char symname##_start[], symname##_end[]; \ + extern struct page *symname##_pages[] + #if defined CONFIG_X86_32 || defined CONFIG_COMPAT -extern const char VDSO32_PRELINK[]; + +#include <asm/vdso32.h> + +DECLARE_VDSO_IMAGE(vdso32_int80); +#ifdef CONFIG_COMPAT +DECLARE_VDSO_IMAGE(vdso32_syscall); +#endif +DECLARE_VDSO_IMAGE(vdso32_sysenter); /* * Given a pointer to the vDSO image, find the pointer to VDSO32_name @@ -11,8 +48,7 @@ extern const char VDSO32_PRELINK[]; #define VDSO32_SYMBOL(base, name) \ ({ \ extern const char VDSO32_##name[]; \ - (void __user *)(VDSO32_##name - VDSO32_PRELINK + \ - (unsigned long)(base)); \ + (void __user *)(VDSO32_##name + (unsigned long)(base)); \ }) #endif @@ -23,12 +59,8 @@ extern const char VDSO32_PRELINK[]; extern void __user __kernel_sigreturn; extern void __user __kernel_rt_sigreturn; -/* - * These symbols are defined by vdso32.S to mark the bounds - * of the ELF DSO images included therein. - */ -extern const char vdso32_int80_start, vdso32_int80_end; -extern const char vdso32_syscall_start, vdso32_syscall_end; -extern const char vdso32_sysenter_start, vdso32_sysenter_end; +void __init patch_vdso32(void *vdso, size_t len); + +#endif /* __ASSEMBLER__ */ #endif /* _ASM_X86_VDSO_H */ |