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| author | Ulrich Drepper <drepper@redhat.com> | 2005-12-18 16:59:55 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2005-12-18 16:59:55 +0000 |
| commit | 3467f5c369a10ef19c8df38fb282c7763f36d66f (patch) | |
| tree | 7d6afe114581e5efe3ea88abc9acf07185a500ac /sysdeps/unix | |
| parent | 827b70873b41363c864fb65e99829204595d0f85 (diff) | |
| download | glibc-3467f5c369a10ef19c8df38fb282c7763f36d66f.tar.gz glibc-3467f5c369a10ef19c8df38fb282c7763f36d66f.tar.xz glibc-3467f5c369a10ef19c8df38fb282c7763f36d66f.zip | |
* sysdeps/unix/sysv/linux/i386/sysdep.h: Define PTR_MANGLE and
PTR_DEMANGLE for C code in libc. * sysdeps/unix/sysv/linux/x86_64/sysdep.h: Likewise.
Diffstat (limited to 'sysdeps/unix')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/sysdep.h | 13 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/sysdep.h | 21 |
2 files changed, 28 insertions, 6 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.h b/sysdeps/unix/sysv/linux/i386/sysdep.h index 929c6e5191..cb5767955c 100644 --- a/sysdeps/unix/sysv/linux/i386/sysdep.h +++ b/sysdeps/unix/sysv/linux/i386/sysdep.h @@ -565,8 +565,17 @@ asm (".L__X'%ebx = 1\n\t" earlier than the descriptor is initialized. Using a global variable is too complicated here since we have no PC-relative addressing mode. */ #else -# define PTR_MANGLE(reg) xorl %gs:POINTER_GUARD, reg -# define PTR_DEMANGLE(reg) PTR_MANGLE (reg) +# ifdef __ASSEMBLER__ +# define PTR_MANGLE(reg) xorl %gs:POINTER_GUARD, reg +# define PTR_DEMANGLE(reg) PTR_MANGLE (reg) +# else +# define PTR_MANGLE(var) asm ("xorl %%gs:%c2, %0" \ + : "=r" (var) \ + : "0" (var), \ + "i" (offsetof (tcbhead_t, \ + pointer_guard))) +# define PTR_DEMANGLE(var) PTR_MANGLE (var) +# endif #endif #endif /* linux/i386/sysdep.h */ diff --git a/sysdeps/unix/sysv/linux/x86_64/sysdep.h b/sysdeps/unix/sysv/linux/x86_64/sysdep.h index 2ea69c3bfd..bb0b604aea 100644 --- a/sysdeps/unix/sysv/linux/x86_64/sysdep.h +++ b/sysdeps/unix/sysv/linux/x86_64/sysdep.h @@ -316,11 +316,24 @@ #if defined NOT_IN_libc && defined IS_IN_rtld /* We cannot use the thread descriptor because in ld.so we use setjmp earlier than the descriptor is initialized. */ -# define PTR_MANGLE(reg) xorq __pointer_chk_guard_local(%rip), reg -# define PTR_DEMANGLE(reg) PTR_MANGLE (reg) +# ifdef __ASSEMBLER__ +# define PTR_MANGLE(reg) xorq __pointer_chk_guard_local(%rip), reg +# define PTR_DEMANGLE(reg) PTR_MANGLE (reg) +# else +# error "Define these if necessary" +# endif #else -# define PTR_MANGLE(reg) xorq %fs:POINTER_GUARD, reg -# define PTR_DEMANGLE(reg) PTR_MANGLE (reg) +# ifdef __ASSEMBLER__ +# define PTR_MANGLE(reg) xorq %fs:POINTER_GUARD, reg +# define PTR_DEMANGLE(reg) PTR_MANGLE (reg) +# else +# define PTR_MANGLE(var) asm ("xorq %%fs:%c2, %0" \ + : "=r" (var) \ + : "0" (var), \ + "i" (offsetof (tcbhead_t, \ + pointer_guard))) +# define PTR_DEMANGLE(var) PTR_MANGLE (var) +# endif #endif #endif /* linux/x86_64/sysdep.h */ |