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(PTR_MANGLE): Define.

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(PTR_MANGLE2): Define.
This commit is contained in:
Ulrich Drepper 2006-01-11 22:16:27 +00:00
parent 8470e5f2ee
commit 53d1d237fc
1 changed files with 37 additions and 2 deletions
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39
sysdeps/unix/sysv/linux/alpha/sysdep.h
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@ -22,10 +22,10 @@
#define _LINUX_ALPHA_SYSDEP_H 1
#ifdef __ASSEMBLER__
#include <asm/pal.h>
#include <alpha/regdef.h>
#else
#include <stdint.h>
#endif
/* There is some commonality. */
@ -98,4 +98,39 @@
INTERNAL_SYSCALL1(name, err_out, nr, args); \
})
/* Pointer mangling support. Note that tls access is slow enough that
we don't deoptimize things by placing the pointer check value there. */
#if defined NOT_IN_libc && defined IS_IN_rtld
# ifdef __ASSEMBLER__
# define PTR_MANGLE(dst, src, tmp) \
ldah tmp, __pointer_chk_guard_local($29) !gprelhigh; \
ldq tmp, __pointer_chk_guard_local(tmp) !gprellow; \
xor src, tmp, dst
# define PTR_MANGLE2(dst, src, tmp) \
xor src, tmp, dst
# define PTR_DEMANGLE(dst, tmp) PTR_MANGLE(dst, dst, tmp)
# define PTR_DEMANGLE2(dst, tmp) PTR_MANGLE2(dst, dst, tmp)
# else
extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden;
# define PTR_MANGLE(var) \
(var) = (void *) ((uintptr_t) (var) ^ __pointer_chk_guard_local)
# define PTR_DEMANGLE(var) PTR_MANGLE(var)
# endif
#elif defined PIC
# ifdef __ASSEMBLER__
# define PTR_MANGLE(dst, src, tmp) \
ldq tmp, __pointer_chk_guard; \
xor src, tmp, dst
# define PTR_MANGLE2(dst, src, tmp) \
xor src, tmp, dst
# define PTR_DEMANGLE(dst, tmp) PTR_MANGLE(dst, dst, tmp)
# define PTR_DEMANGLE2(dst, tmp) PTR_MANGLE2(dst, dst, tmp)
# else
extern uintptr_t __pointer_chk_guard attribute_relro;
# define PTR_MANGLE(var) \
(var) = (void *) ((uintptr_t) (var) ^ __pointer_chk_guard)
# define PTR_DEMANGLE(var) PTR_MANGLE(var)
# endif
#endif
#endif /* _LINUX_ALPHA_SYSDEP_H */