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| author | Roland McGrath <roland@hack.frob.com> | 2014-08-01 11:28:49 -0700 |
|---|---|---|
| committer | Roland McGrath <roland@hack.frob.com> | 2014-08-01 11:28:49 -0700 |
| commit | 6f64e7d75fdab0be50edc814a41ddc43ef4ec8ef (patch) | |
| tree | a06a97081593c3e6d14bdf0e5fcc4b8af5ffd89e /sysdeps/arm | |
| parent | a476ac4b45fe39b023bed55c852abad04d70c5df (diff) | |
| download | glibc-6f64e7d75fdab0be50edc814a41ddc43ef4ec8ef.zip glibc-6f64e7d75fdab0be50edc814a41ddc43ef4ec8ef.tar.gz glibc-6f64e7d75fdab0be50edc814a41ddc43ef4ec8ef.tar.bz2 | |
ARM: Move PTR_MANGLE et al out of Linux-specific file.
Diffstat (limited to 'sysdeps/arm')
| -rw-r--r-- | sysdeps/arm/sysdep.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/sysdeps/arm/sysdep.h b/sysdeps/arm/sysdep.h index 7f34ab0..84b07e1 100644 --- a/sysdeps/arm/sysdep.h +++ b/sysdeps/arm/sysdep.h @@ -19,6 +19,10 @@ #include <sysdeps/generic/sysdep.h> #include <features.h> +#ifndef __ASSEMBLER__ +# include <stdint.h> +#endif + /* The __ARM_ARCH define is provided by gcc 4.8. Construct it otherwise. */ #ifndef __ARM_ARCH # ifdef __ARM_ARCH_2__ @@ -286,3 +290,47 @@ #else # define PC_OFS 8 #endif + +/* Pointer mangling support. */ +#if (defined NOT_IN_libc && defined IS_IN_rtld) || \ + (!defined SHARED && (!defined NOT_IN_libc || defined IS_IN_libpthread)) +# ifdef __ASSEMBLER__ +# define PTR_MANGLE_LOAD(guard, tmp) \ + LDST_PCREL(ldr, guard, tmp, C_SYMBOL_NAME(__pointer_chk_guard_local)); +# define PTR_MANGLE(dst, src, guard, tmp) \ + PTR_MANGLE_LOAD(guard, tmp); \ + PTR_MANGLE2(dst, src, guard) +/* Use PTR_MANGLE2 for efficiency if guard is already loaded. */ +# define PTR_MANGLE2(dst, src, guard) \ + eor dst, src, guard +# define PTR_DEMANGLE(dst, src, guard, tmp) \ + PTR_MANGLE (dst, src, guard, tmp) +# define PTR_DEMANGLE2(dst, src, guard) \ + PTR_MANGLE2 (dst, src, guard) +# else +extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden; +# define PTR_MANGLE(var) \ + (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local) +# define PTR_DEMANGLE(var) PTR_MANGLE (var) +# endif +#else +# ifdef __ASSEMBLER__ +# define PTR_MANGLE_LOAD(guard, tmp) \ + LDST_GLOBAL(ldr, guard, tmp, C_SYMBOL_NAME(__pointer_chk_guard)); +# define PTR_MANGLE(dst, src, guard, tmp) \ + PTR_MANGLE_LOAD(guard, tmp); \ + PTR_MANGLE2(dst, src, guard) +/* Use PTR_MANGLE2 for efficiency if guard is already loaded. */ +# define PTR_MANGLE2(dst, src, guard) \ + eor dst, src, guard +# define PTR_DEMANGLE(dst, src, guard, tmp) \ + PTR_MANGLE (dst, src, guard, tmp) +# define PTR_DEMANGLE2(dst, src, guard) \ + PTR_MANGLE2 (dst, src, guard) +# else +extern uintptr_t __pointer_chk_guard attribute_relro; +# define PTR_MANGLE(var) \ + (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard) +# define PTR_DEMANGLE(var) PTR_MANGLE (var) +# endif +#endif |