diff options
| -rw-r--r-- | ChangeLog | 22 | ||||
| -rw-r--r-- | elf/Versions | 2 | ||||
| -rw-r--r-- | elf/rtld.c | 32 | ||||
| -rw-r--r-- | nptl/ChangeLog | 10 | ||||
| -rw-r--r-- | nptl/pthread_create.c | 5 | ||||
| -rw-r--r-- | nptl/sysdeps/i386/tcb-offsets.sym | 1 | ||||
| -rw-r--r-- | nptl/sysdeps/i386/tls.h | 9 | ||||
| -rw-r--r-- | nptl/sysdeps/x86_64/tcb-offsets.sym | 1 | ||||
| -rw-r--r-- | nptl/sysdeps/x86_64/tls.h | 10 | ||||
| -rw-r--r-- | sysdeps/generic/ldsodefs.h | 3 | ||||
| -rw-r--r-- | sysdeps/i386/__longjmp.S | 5 | ||||
| -rw-r--r-- | sysdeps/i386/bsd-_setjmp.S | 5 | ||||
| -rw-r--r-- | sysdeps/i386/bsd-setjmp.S | 7 | ||||
| -rw-r--r-- | sysdeps/i386/elf/bsd-setjmp.S | 82 | ||||
| -rw-r--r-- | sysdeps/i386/elf/setjmp.S | 70 | ||||
| -rw-r--r-- | sysdeps/i386/setjmp.S | 13 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/sysdep.h | 11 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/sysdep.h | 12 | ||||
| -rw-r--r-- | sysdeps/x86_64/__longjmp.S | 5 | ||||
| -rw-r--r-- | sysdeps/x86_64/setjmp.S | 15 |
20 files changed, 159 insertions, 161 deletions
@@ -1,5 +1,27 @@ 2005-12-17 Ulrich Drepper <drepper@redhat.com> + * elf/Versions [GLIBC_PRIVATE]: Export __pointer_chk_guard if defined. + * elf/rtld.c: Define __pointer_chk_guard_local and if necessary + __pointer_chk_guard. + (_rtld_global_ro): Initialize _dl_pointer_guard. + (dl_main): Initialize __pointer_chk_guard_local and either + __pointer_chk_guard or TLS value if necessary. + (process_envvars): Recognize and handle LD_POINTER_GUARD. + * sysdeps/generic/ldsodefs.h (rtld_global_ro): Add _dl_pointer_guard. + * sysdeps/i386/__longjmp.S: Use PTR_DEMANGLE for PC if defined. + * sysdeps/x86_64/__longjmp.S: Likewise. + * sysdeps/i386/bsd-_setjmp.S: Use PTR_MANGLE for PC if defined. + * sysdeps/i386/bsd-_setjmp.S: Likewise. + * sysdeps/i386/setjmp.S: Likewise. + [IS_IN_rtld]: Avoid call to __sigjmp_save. + * sysdeps/i386/setjmp.S: Likewise. + * sysdeps/unix/sysv/linux/i386/sysdep.h: Define PTR_MANGLE and + PTR_DEMANGLE. + * sysdeps/unix/sysv/linux/x86_64/sysdep.h: Likewise. + + * sysdeps/i386/elf/setjmp.S: Removed. + * sysdeps/i386/elf/bsd-setjmp.S: Removed. + * elf/dl-error.c (_dl_catch_error): Use __sigsetgjmp instead of setjmp. * elf/dl-error.c (_dl_signal_error): Use __longjmp instead of longjmp. diff --git a/elf/Versions b/elf/Versions index 9c53f16..87e27c5 100644 --- a/elf/Versions +++ b/elf/Versions @@ -60,5 +60,7 @@ ld { _dl_make_stack_executable; # Only here for gdb while a better method is developed. _dl_debug_state; + # Pointer protection. + __pointer_chk_guard; } } @@ -90,6 +90,15 @@ INTDEF(_dl_argv) uintptr_t __stack_chk_guard attribute_relro; #endif +/* Only exported for architectures that don't store the pointer guard + value in thread local area. */ +uintptr_t __pointer_chk_guard_local + attribute_relro attribute_hidden __attribute__ ((nocommon)); +#ifndef THREAD_SET_POINTER_GUARD +strong_alias (__pointer_chk_guard_local, __pointer_chk_guard) +#endif + + /* List of auditing DSOs. */ static struct audit_list { @@ -142,6 +151,7 @@ struct rtld_global_ro _rtld_global_ro attribute_relro = ._dl_hwcap_mask = HWCAP_IMPORTANT, ._dl_lazy = 1, ._dl_fpu_control = _FPU_DEFAULT, + ._dl_pointer_guard = 1, /* Function pointers. */ ._dl_debug_printf = _dl_debug_printf, @@ -1823,6 +1833,20 @@ ERROR: ld.so: object '%s' cannot be loaded as audit interface: %s; ignored.\n", __stack_chk_guard = stack_chk_guard; #endif + /* Set up the pointer guard as well, if necessary. */ + if (GLRO(dl_pointer_guard)) + { + // XXX If it is cheap, we should use a separate value. + uintptr_t pointer_chk_guard; + hp_timing_t now; + HP_TIMING_NOW (now); + pointer_chk_guard = stack_chk_guard ^ now; +#ifdef THREAD_SET_POINTER_GUARD + THREAD_SET_POINTER_GUARD (pointer_chk_guard); +#endif + __pointer_chk_guard_local = pointer_chk_guard; + } + if (__builtin_expect (mode, normal) != normal) { /* We were run just to list the shared libraries. It is @@ -2575,7 +2599,13 @@ process_envvars (enum mode *modep) #endif if (!INTUSE(__libc_enable_secure) && memcmp (envline, "USE_LOAD_BIAS", 13) == 0) - GLRO(dl_use_load_bias) = envline[14] == '1' ? -1 : 0; + { + GLRO(dl_use_load_bias) = envline[14] == '1' ? -1 : 0; + break; + } + + if (memcmp (envline, "POINTER_GUARD", 13) == 0) + GLRO(dl_pointer_guard) = envline[14] == '0'; break; case 14: diff --git a/nptl/ChangeLog b/nptl/ChangeLog index 9db2e49..7a35696 100644 --- a/nptl/ChangeLog +++ b/nptl/ChangeLog @@ -1,3 +1,13 @@ +2005-12-17 Ulrich Drepper <drepper@redhat.com> + + * pthread_create.c (__pthread_create_2_1): Use + THREAD_COPY_POINTER_GUARD if available. + * sysdeps/i386/tcb-offsets.sym: Add POINTER_GUARD. + * sysdeps/x86_64/tcb-offsets.sym: Likewise. + * sysdeps/i386/tls.h (tcbhead_t): Add pointer_guard. + Define THREAD_SET_POINTER_GUARD and THREAD_COPY_POINTER_GUARD. + * sysdeps/x86_64/tls.h: Likewise. + 2005-12-15 Roland McGrath <roland@redhat.com> * sysdeps/unix/sysv/linux/mq_notify.c: Don't use sysdeps/generic. diff --git a/nptl/pthread_create.c b/nptl/pthread_create.c index f2f206b..c11d972 100644 --- a/nptl/pthread_create.c +++ b/nptl/pthread_create.c @@ -415,6 +415,11 @@ __pthread_create_2_1 (newthread, attr, start_routine, arg) THREAD_COPY_STACK_GUARD (pd); #endif + /* Copy the pointer guard value. */ +#ifdef THREAD_COPY_POINTER_GUARD + THREAD_COPY_POINTER_GUARD (pd); +#endif + /* Determine scheduling parameters for the thread. */ if (attr != NULL && __builtin_expect ((iattr->flags & ATTR_FLAG_NOTINHERITSCHED) != 0, 0) diff --git a/nptl/sysdeps/i386/tcb-offsets.sym b/nptl/sysdeps/i386/tcb-offsets.sym index 4e0444b..7c8d9a5 100644 --- a/nptl/sysdeps/i386/tcb-offsets.sym +++ b/nptl/sysdeps/i386/tcb-offsets.sym @@ -11,3 +11,4 @@ SYSINFO_OFFSET offsetof (tcbhead_t, sysinfo) CLEANUP offsetof (struct pthread, cleanup) CLEANUP_PREV offsetof (struct _pthread_cleanup_buffer, __prev) MUTEX_FUTEX offsetof (pthread_mutex_t, __data.__lock) +POINTER_GUARD offsetof (tcbhead_t, pointer_guard) diff --git a/nptl/sysdeps/i386/tls.h b/nptl/sysdeps/i386/tls.h index 65566ff..a870a84 100644 --- a/nptl/sysdeps/i386/tls.h +++ b/nptl/sysdeps/i386/tls.h @@ -50,6 +50,7 @@ typedef struct int multiple_threads; uintptr_t sysinfo; uintptr_t stack_guard; + uintptr_t pointer_guard; } tcbhead_t; # define TLS_MULTIPLE_THREADS_IN_TCB 1 @@ -425,6 +426,14 @@ union user_desc_init = THREAD_GETMEM (THREAD_SELF, header.stack_guard)) +/* Set the pointer guard field in the TCB head. */ +#define THREAD_SET_POINTER_GUARD(value) \ + THREAD_SETMEM (THREAD_SELF, header.pointer_guard, value) +#define THREAD_COPY_POINTER_GUARD(descr) \ + ((descr)->header.pointer_guard \ + = THREAD_GETMEM (THREAD_SELF, header.pointer_guard)) + + #endif /* __ASSEMBLER__ */ #endif /* tls.h */ diff --git a/nptl/sysdeps/x86_64/tcb-offsets.sym b/nptl/sysdeps/x86_64/tcb-offsets.sym index 8118d2d..a9ede75 100644 --- a/nptl/sysdeps/x86_64/tcb-offsets.sym +++ b/nptl/sysdeps/x86_64/tcb-offsets.sym @@ -10,3 +10,4 @@ CLEANUP offsetof (struct pthread, cleanup) CLEANUP_PREV offsetof (struct _pthread_cleanup_buffer, __prev) MUTEX_FUTEX offsetof (pthread_mutex_t, __data.__lock) MULTIPLE_THREADS_OFFSET offsetof (tcbhead_t, multiple_threads) +POINTER_GUARD offsetof (tcbhead_t, pointer_guard) diff --git a/nptl/sysdeps/x86_64/tls.h b/nptl/sysdeps/x86_64/tls.h index 516827b..13cf6fb 100644 --- a/nptl/sysdeps/x86_64/tls.h +++ b/nptl/sysdeps/x86_64/tls.h @@ -49,6 +49,7 @@ typedef struct int multiple_threads; uintptr_t sysinfo; uintptr_t stack_guard; + uintptr_t pointer_guard; } tcbhead_t; #else /* __ASSEMBLER__ */ @@ -329,6 +330,15 @@ typedef struct ((descr)->header.stack_guard \ = THREAD_GETMEM (THREAD_SELF, header.stack_guard)) + +/* Set the pointer guard field in the TCB head. */ +#define THREAD_SET_POINTER_GUARD(value) \ + THREAD_SETMEM (THREAD_SELF, header.pointer_guard, value) +#define THREAD_COPY_POINTER_GUARD(descr) \ + ((descr)->header.pointer_guard \ + = THREAD_GETMEM (THREAD_SELF, header.pointer_guard)) + + #endif /* __ASSEMBLER__ */ #endif /* tls.h */ diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h index 67a20ce..b5f7c3c 100644 --- a/sysdeps/generic/ldsodefs.h +++ b/sysdeps/generic/ldsodefs.h @@ -623,6 +623,9 @@ struct rtld_global_ro /* Expected cache ID. */ EXTERN int _dl_correct_cache_id; + /* 0 if internal pointer values should not be guarded, 1 if they should. */ + EXTERN int _dl_pointer_guard; + /* Mask for hardware capabilities that are available. */ EXTERN uint64_t _dl_hwcap; diff --git a/sysdeps/i386/__longjmp.S b/sysdeps/i386/__longjmp.S index 6b590f7..aced5f4 100644 --- a/sysdeps/i386/__longjmp.S +++ b/sysdeps/i386/__longjmp.S @@ -1,5 +1,5 @@ /* longjmp for i386. - Copyright (C) 1995,1996,1997,1998,2000,2002 Free Software Foundation, Inc. + Copyright (C) 1995-1998,2000,2002,2005 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 @@ -44,6 +44,9 @@ ENTRY (BP_SYM (__longjmp)) movl (JB_DI*4)(%ecx), %edi movl (JB_BP*4)(%ecx), %ebp movl (JB_SP*4)(%ecx), %esp +#ifdef PTR_DEMANGLE + PTR_DEMANGLE (%edx) +#endif /* Jump to saved PC. */ jmp *%edx END (BP_SYM (__longjmp)) diff --git a/sysdeps/i386/bsd-_setjmp.S b/sysdeps/i386/bsd-_setjmp.S index aa8df16..f80d239 100644 --- a/sysdeps/i386/bsd-_setjmp.S +++ b/sysdeps/i386/bsd-_setjmp.S @@ -1,5 +1,5 @@ /* BSD `_setjmp' entry point to `sigsetjmp (..., 0)'. i386 version. - Copyright (C) 1994-1997,2000,2001,2002 Free Software Foundation, Inc. + Copyright (C) 1994-1997,2000-2002,2005 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 @@ -46,6 +46,9 @@ ENTRY (BP_SYM (_setjmp)) leal JMPBUF(%esp), %ecx /* Save SP as it will be after we return. */ movl %ecx, (JB_SP*4)(%edx) movl PCOFF(%esp), %ecx /* Save PC we are returning to now. */ +#ifdef PTR_MANGLE + PTR_MANGLE (%ecx) +#endif movl %ecx, (JB_PC*4)(%edx) LEAVE movl %ebp, (JB_BP*4)(%edx) /* Save caller's frame pointer. */ diff --git a/sysdeps/i386/bsd-setjmp.S b/sysdeps/i386/bsd-setjmp.S index b6934dc..f4257a0 100644 --- a/sysdeps/i386/bsd-setjmp.S +++ b/sysdeps/i386/bsd-setjmp.S @@ -28,6 +28,10 @@ #include "bp-sym.h" #include "bp-asm.h" +#define PARMS LINKAGE /* no space for saved regs */ +#define JMPBUF PARMS +#define SIGMSK JMPBUF+PTR_SIZE + ENTRY (BP_SYM (setjmp)) /* Note that we have to use a non-exported symbol in the next jump since otherwise gas will emit it as a jump through the @@ -44,6 +48,9 @@ ENTRY (BP_SYM (setjmp)) leal JMPBUF(%esp), %ecx /* Save SP as it will be after we return. */ movl %ecx, (JB_SP*4)(%eax) movl PCOFF(%esp), %ecx /* Save PC we are returning to now. */ +#ifdef PTR_MANGLE + PTR_MANGLE (%ecx) +#endif movl %ecx, (JB_PC*4)(%eax) LEAVE /* pop frame pointer to prepare for tail-call. */ movl %ebp, (JB_BP*4)(%eax) /* Save caller's frame pointer. */ diff --git a/sysdeps/i386/elf/bsd-setjmp.S b/sysdeps/i386/elf/bsd-setjmp.S deleted file mode 100644 index c421791..0000000 --- a/sysdeps/i386/elf/bsd-setjmp.S +++ /dev/null @@ -1,82 +0,0 @@ -/* BSD `setjmp' entry point to `sigsetjmp (..., 1)'. i386 version. - Copyright (C) 1995-1997,2000-2003,2005 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 - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <sysdep.h> -#define _ASM -#define _SETJMP_H -#include <bits/setjmp.h> -#include "bp-sym.h" -#include "bp-asm.h" - -#define PARMS LINKAGE /* no space for saved regs */ -#define JMPBUF PARMS -#define SIGMSK JMPBUF+PTR_SIZE - -ENTRY (BP_SYM (setjmp)) - /* Note that we have to use a non-exported symbol in the next - jump since otherwise gas will emit it as a jump through the - PLT which is what we cannot use here. */ - ENTER - - movl JMPBUF(%esp), %eax - CHECK_BOUNDS_BOTH_WIDE (%eax, JMPBUF(%esp), $JB_SIZE) - - /* Save registers. */ - movl %ebx, (JB_BX*4)(%eax) - movl %esi, (JB_SI*4)(%eax) - movl %edi, (JB_DI*4)(%eax) - leal JMPBUF(%esp), %ecx /* Save SP as it will be after we return. */ - movl %ecx, (JB_SP*4)(%eax) - movl PCOFF(%esp), %ecx /* Save PC we are returning to now. */ - movl %ecx, (JB_PC*4)(%eax) - LEAVE /* pop frame pointer to prepare for tail-call. */ - movl %ebp, (JB_BP*4)(%eax) /* Save caller's frame pointer. */ - - /* Call __sigjmp_save. */ - pushl $1 - cfi_adjust_cfa_offset (4) - pushl 8(%esp) - cfi_adjust_cfa_offset (4) -#ifdef PIC - /* We cannot use the PLT, because it requires that %ebx be set, but - we can't save and restore our caller's value. Instead, we do an - indirect jump through the GOT, using for the temporary register - %ecx, which is call-clobbered. */ - call __i686.get_pc_thunk.cx - addl $_GLOBAL_OFFSET_TABLE_, %ecx - leal C_SYMBOL_NAME (BP_SYM (__sigjmp_save)@GOTOFF)(%ecx), %ecx - call *%ecx -#else - call BP_SYM (__sigjmp_save) -#endif - popl %ecx - cfi_adjust_cfa_offset (-4) - popl %edx - cfi_adjust_cfa_offset (-4) - ret -END (BP_SYM (setjmp)) - - .section .gnu.linkonce.t.__i686.get_pc_thunk.cx,"ax",@progbits - .globl __i686.get_pc_thunk.cx - .hidden __i686.get_pc_thunk.cx - .type __i686.get_pc_thunk.cx,@function -__i686.get_pc_thunk.cx: - movl (%esp), %ecx - ret - .size __i686.get_pc_thunk.cx, . - __i686.get_pc_thunk.cx diff --git a/sysdeps/i386/elf/setjmp.S b/sysdeps/i386/elf/setjmp.S deleted file mode 100644 index d6ae98b..0000000 --- a/sysdeps/i386/elf/setjmp.S +++ /dev/null @@ -1,70 +0,0 @@ -/* setjmp for i386, ELF version. - Copyright (C) 1995-1997,2000,2001,2002,2003 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 - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <sysdep.h> -#define _ASM -#define _SETJMP_H -#include <bits/setjmp.h> -#include "bp-sym.h" -#include "bp-asm.h" - -#define PARMS LINKAGE /* no space for saved regs */ -#define JMPBUF PARMS -#define SIGMSK JMPBUF+PTR_SIZE - -ENTRY (BP_SYM (__sigsetjmp)) - ENTER - - movl JMPBUF(%esp), %eax - CHECK_BOUNDS_BOTH_WIDE (%eax, JMPBUF(%esp), $JB_SIZE) - - /* Save registers. */ - movl %ebx, (JB_BX*4)(%eax) - movl %esi, (JB_SI*4)(%eax) - movl %edi, (JB_DI*4)(%eax) - leal JMPBUF(%esp), %ecx /* Save SP as it will be after we return. */ - movl %ecx, (JB_SP*4)(%eax) - movl PCOFF(%esp), %ecx /* Save PC we are returning to now. */ - movl %ecx, (JB_PC*4)(%eax) - LEAVE /* pop frame pointer to prepare for tail-call. */ - movl %ebp, (JB_BP*4)(%eax) /* Save caller's frame pointer. */ - - /* Make a tail call to __sigjmp_save; it takes the same args. */ -#ifdef PIC - /* We cannot use the PLT, because it requires that %ebx be set, but - we can't save and restore our caller's value. Instead, we do an - indirect jump through the GOT, using for the temporary register - %ecx, which is call-clobbered. */ - call __i686.get_pc_thunk.cx - addl $_GLOBAL_OFFSET_TABLE_, %ecx - leal C_SYMBOL_NAME (BP_SYM (__sigjmp_save)@GOTOFF)(%ecx), %ecx - jmp *%ecx -#else - jmp BP_SYM (__sigjmp_save) -#endif -END (BP_SYM (__sigsetjmp)) - - .section .gnu.linkonce.t.__i686.get_pc_thunk.cx,"ax",@progbits - .globl __i686.get_pc_thunk.cx - .hidden __i686.get_pc_thunk.cx - .type __i686.get_pc_thunk.cx,@function -__i686.get_pc_thunk.cx: - movl (%esp), %ecx - ret - .size __i686.get_pc_thunk.cx, . - __i686.get_pc_thunk.cx diff --git a/sysdeps/i386/setjmp.S b/sysdeps/i386/setjmp.S index e01d32b..747499a 100644 --- a/sysdeps/i386/setjmp.S +++ b/sysdeps/i386/setjmp.S @@ -1,5 +1,5 @@ /* setjmp for i386. - Copyright (C) 1995, 1996, 1997, 2000, 2001 Free Software Foundation, Inc. + Copyright (C) 1995,1996,1997,2000,2001,2005 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 @@ -42,10 +42,19 @@ ENTRY (BP_SYM (__sigsetjmp)) leal JMPBUF(%esp), %ecx /* Save SP as it will be after we return. */ movl %ecx, (JB_SP*4)(%eax) movl PCOFF(%esp), %ecx /* Save PC we are returning to now. */ +#ifdef PTR_MANGLE + PTR_MANGLE (%ecx) +#endif movl %ecx, (JB_PC*4)(%eax) LEAVE /* pop frame pointer to prepare for tail-call. */ movl %ebp, (JB_BP*4)(%eax) /* Save caller's frame pointer. */ +#if defined NOT_IN_libc && defined IS_IN_rtld + /* In ld.so we never save the signal mask. */ + xorl %eax, %eax + ret +#else /* Make a tail call to __sigjmp_save; it takes the same args. */ - jmp BP_SYM (__sigjmp_save) + jmp __sigjmp_save +#endif END (BP_SYM (__sigsetjmp)) diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.h b/sysdeps/unix/sysv/linux/i386/sysdep.h index 99f9bf1..929c6e5 100644 --- a/sysdeps/unix/sysv/linux/i386/sysdep.h +++ b/sysdeps/unix/sysv/linux/i386/sysdep.h @@ -558,4 +558,15 @@ asm (".L__X'%ebx = 1\n\t" #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. 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) +#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 0dc2f27..2ea69c3 100644 --- a/sysdeps/unix/sysv/linux/x86_64/sysdep.h +++ b/sysdeps/unix/sysv/linux/x86_64/sysdep.h @@ -311,4 +311,16 @@ #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. */ +# define PTR_MANGLE(reg) xorq __pointer_chk_guard_local(%rip), reg +# define PTR_DEMANGLE(reg) PTR_MANGLE (reg) +#else +# define PTR_MANGLE(reg) xorq %fs:POINTER_GUARD, reg +# define PTR_DEMANGLE(reg) PTR_MANGLE (reg) +#endif + #endif /* linux/x86_64/sysdep.h */ diff --git a/sysdeps/x86_64/__longjmp.S b/sysdeps/x86_64/__longjmp.S index 9ed480c..becfb4f 100644 --- a/sysdeps/x86_64/__longjmp.S +++ b/sysdeps/x86_64/__longjmp.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2001, 2004 Free Software Foundation, Inc. +/* Copyright (C) 2001, 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 @@ -50,5 +50,8 @@ ENTRY(__longjmp) mov %esi, %eax movq (JB_PC*8)(%rdi),%rdx movq (JB_RSP*8)(%rdi),%rsp +#ifdef PTR_DEMANGLE + PTR_DEMANGLE (%rdx) +#endif jmpq *%rdx END (BP_SYM (__longjmp)) diff --git a/sysdeps/x86_64/setjmp.S b/sysdeps/x86_64/setjmp.S index 811ab1d..8af5502 100644 --- a/sysdeps/x86_64/setjmp.S +++ b/sysdeps/x86_64/setjmp.S @@ -1,5 +1,5 @@ /* setjmp for x86-64. - Copyright (C) 2001, 2003 Free Software Foundation, Inc. + Copyright (C) 2001, 2003, 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 @@ -34,13 +34,22 @@ ENTRY (__sigsetjmp) leaq 8(%rsp), %rdx /* Save SP as it will be after we return. */ movq %rdx, (JB_RSP*8)(%rdi) movq (%rsp), %rax /* Save PC we are returning to now. */ +#ifdef PTR_MANGLE + PTR_MANGLE (%rax) +#endif movq %rax, (JB_PC*8)(%rdi) +#if defined NOT_IN_libc && defined IS_IN_rtld + /* In ld.so we never save the signal mask. */ + xorl %eax, %eax + retq +#else /* Make a tail call to __sigjmp_save; it takes the same args. */ -#ifdef PIC +# ifdef PIC jmp C_SYMBOL_NAME (BP_SYM (__sigjmp_save))@PLT -#else +# else jmp BP_SYM (__sigjmp_save) +# endif #endif END (BP_SYM (__sigsetjmp)) hidden_def (__sigsetjmp) |