| H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 1 | #ifndef _ASM_X86_VDSO_H |
| 2 | #define _ASM_X86_VDSO_H |
| Roland McGrath | 7f3646a | 2008-01-30 13:30:41 +0100 | [diff] [blame] | 3 | |
| Roland McGrath | 6c3652e | 2008-01-30 13:30:42 +0100 | [diff] [blame] | 4 | #if defined CONFIG_X86_32 || defined CONFIG_COMPAT |
| 5 | extern const char VDSO32_PRELINK[]; |
| 6 | |
| 7 | /* |
| 8 | * Given a pointer to the vDSO image, find the pointer to VDSO32_name |
| 9 | * as that symbol is defined in the vDSO sources or linker script. |
| 10 | */ |
| Joe Perches | ac1a7b0 | 2008-03-23 01:03:56 -0700 | [diff] [blame] | 11 | #define VDSO32_SYMBOL(base, name) \ |
| 12 | ({ \ |
| 13 | extern const char VDSO32_##name[]; \ |
| Mathias Krause | 3d13340 | 2012-09-02 23:31:41 +0200 | [diff] [blame] | 14 | (void __user *)(VDSO32_##name - VDSO32_PRELINK + \ |
| 15 | (unsigned long)(base)); \ |
| Joe Perches | ac1a7b0 | 2008-03-23 01:03:56 -0700 | [diff] [blame] | 16 | }) |
| Roland McGrath | 6c3652e | 2008-01-30 13:30:42 +0100 | [diff] [blame] | 17 | #endif |
| Roland McGrath | 7f3646a | 2008-01-30 13:30:41 +0100 | [diff] [blame] | 18 | |
| Ingo Molnar | eee6dd1 | 2008-03-06 10:39:07 +0100 | [diff] [blame] | 19 | /* |
| 20 | * These symbols are defined with the addresses in the vsyscall page. |
| 21 | * See vsyscall-sigreturn.S. |
| 22 | */ |
| 23 | extern void __user __kernel_sigreturn; |
| 24 | extern void __user __kernel_rt_sigreturn; |
| 25 | |
| Jeremy Fitzhardinge | 6a52e4b | 2008-07-12 02:22:00 -0700 | [diff] [blame] | 26 | /* |
| 27 | * These symbols are defined by vdso32.S to mark the bounds |
| 28 | * of the ELF DSO images included therein. |
| 29 | */ |
| 30 | extern const char vdso32_int80_start, vdso32_int80_end; |
| 31 | extern const char vdso32_syscall_start, vdso32_syscall_end; |
| 32 | extern const char vdso32_sysenter_start, vdso32_sysenter_end; |
| 33 | |
| H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 34 | #endif /* _ASM_X86_VDSO_H */ |