diff options
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/sysdep.h | 13 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/sysdep.h | 21 |
3 files changed, 34 insertions, 6 deletions
@@ -1,3 +1,9 @@ +2005-12-18 Ulrich Drepper <drepper@redhat.com> + + * 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. + 2005-12-17 Ulrich Drepper <drepper@redhat.com> * elf/Versions [GLIBC_PRIVATE]: Export __pointer_chk_guard if defined. diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.h b/sysdeps/unix/sysv/linux/i386/sysdep.h index 929c6e5..cb57679 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 2ea69c3..bb0b604 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 */ |