diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/x86_64/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/sysdep.h | 39 |
1 files changed, 33 insertions, 6 deletions
diff --git a/sysdeps/unix/sysv/linux/x86_64/sysdep.h b/sysdeps/unix/sysv/linux/x86_64/sysdep.h index fd92d7ae16..5dfffca455 100644 --- a/sysdeps/unix/sysv/linux/x86_64/sysdep.h +++ b/sysdeps/unix/sysv/linux/x86_64/sysdep.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2001,02,03,04 Free Software Foundation, Inc. +/* Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -119,7 +119,7 @@ # define SYSCALL_ERROR_HANDLER \ 0: \ leaq rtld_errno(%rip), %rcx; \ - xorq %rdx, %rdx; \ + xorl %edx, %edx; \ subq %rax, %rdx; \ movl %edx, (%rcx); \ orq $-1, %rax; \ @@ -133,7 +133,7 @@ # define SYSCALL_ERROR_HANDLER \ 0: \ movq SYSCALL_ERROR_ERRNO@GOTTPOFF(%rip), %rcx;\ - xorq %rdx, %rdx; \ + xorl %edx, %edx; \ subq %rax, %rdx; \ movl %edx, %fs:(%rcx); \ orq $-1, %rax; \ @@ -143,7 +143,7 @@ Note that errno occupies only 4 bytes. */ # define SYSCALL_ERROR_HANDLER \ 0: \ - xorq %rdx, %rdx; \ + xorl %edx, %edx; \ subq %rax, %rdx; \ pushq %rdx; \ cfi_adjust_cfa_offset(8); \ @@ -161,7 +161,7 @@ #else /* Not _LIBC_REENTRANT. */ # define SYSCALL_ERROR_HANDLER \ 0:movq errno@GOTPCREL(%RIP), %rcx; \ - xorq %rdx, %rdx; \ + xorl %edx, %edx; \ subq %rax, %rdx; \ movl %edx, (%rcx); \ orq $-1, %rax; \ @@ -208,7 +208,7 @@ #undef DO_CALL #define DO_CALL(syscall_name, args) \ DOARGS_##args \ - movq $SYS_ify (syscall_name), %rax; \ + movl $SYS_ify (syscall_name), %eax; \ syscall; #define DOARGS_0 /* nothing */ @@ -311,4 +311,31 @@ #endif /* __ASSEMBLER__ */ + +/* Pointer mangling support. */ +#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. */ +# ifdef __ASSEMBLER__ +# define PTR_MANGLE(reg) xorq __pointer_chk_guard_local(%rip), reg +# define PTR_DEMANGLE(reg) PTR_MANGLE (reg) +# else +# define PTR_MANGLE(reg) asm ("xorq __pointer_chk_guard_local(%%rip), %0"\ + : "=r" (reg) : "0" (reg)) +# define PTR_DEMANGLE(reg) PTR_MANGLE (reg) +# endif +#else +# 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 */ |