mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-15 12:33:30 +08:00
Hurd: ____longjmp_chk
This commit is contained in:
Thomas Schwinge
Roland McGrath
parent
6178c55bdb
commit
bcf5524012
@ -1,3 +1,10 @@
|
||||
2012-05-10 Thomas Schwinge <thomas@schwinge.name>
|
||||
|
||||
* sysdeps/mach/hurd/i386/____longjmp_chk.S: New file.
|
||||
* sysdeps/mach/hurd/i386/signal-defines.sym: New file.
|
||||
* sysdeps/mach/hurd/i386/Makefile (gen-as-const-headers): Add
|
||||
signal-defines.sym.
|
||||
|
||||
2012-05-10 Samuel Thibault <samuel.thibault@ens-lyon.org>
|
||||
|
||||
* bits/in.h (SOL_IP, SOL_IPV6, SOL_ICMPV6): New macros.
|
||||
|
||||
@ -2,3 +2,7 @@ ifeq ($(subdir),misc)
|
||||
sysdep_routines += ioperm
|
||||
sysdep_headers += sys/io.h
|
||||
endif
|
||||
|
||||
ifeq ($(subdir),debug)
|
||||
gen-as-const-headers += signal-defines.sym
|
||||
endif
|
||||
|
||||
107
sysdeps/mach/hurd/i386/____longjmp_chk.S
Normal file
107
sysdeps/mach/hurd/i386/____longjmp_chk.S
Normal file
@ -0,0 +1,107 @@
|
||||
/* Copyright (C) 2001-2012 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, see
|
||||
<http://www.gnu.org/licenses/>. */
|
||||
|
||||
#include <sysdep.h>
|
||||
#include <jmpbuf-offsets.h>
|
||||
#include <asm-syntax.h>
|
||||
|
||||
#include <signal-defines.h>
|
||||
/* #include <signal.h> */
|
||||
#define SS_ONSTACK 1
|
||||
|
||||
|
||||
.section .rodata.str1.1,"aMS",@progbits,1
|
||||
.type longjmp_msg,@object
|
||||
longjmp_msg:
|
||||
.string "longjmp causes uninitialized stack frame"
|
||||
.size longjmp_msg, .-longjmp_msg
|
||||
|
||||
|
||||
#ifdef PIC
|
||||
# define CALL_FAIL movl %ebx, %ecx; /* TODO: what's this mov good for? */ \
|
||||
cfi_register(%ebx,%ecx); \
|
||||
LOAD_PIC_REG (bx); \
|
||||
leal longjmp_msg@GOTOFF(%ebx), %eax; \
|
||||
call HIDDEN_JUMPTARGET(__fortify_fail)
|
||||
#else
|
||||
# define CALL_FAIL movl $longjmp_msg, %eax; \
|
||||
call HIDDEN_JUMPTARGET(__fortify_fail)
|
||||
#endif
|
||||
|
||||
|
||||
.text
|
||||
ENTRY (____longjmp_chk)
|
||||
movl 4(%esp), %ecx /* User's jmp_buf in %ecx. */
|
||||
|
||||
/* Save the return address now. */
|
||||
movl (JB_PC*4)(%ecx), %edx
|
||||
/* Get the stack pointer. */
|
||||
movl (JB_SP*4)(%ecx), %edi
|
||||
cfi_undefined(%edi)
|
||||
PTR_DEMANGLE (%edx)
|
||||
PTR_DEMANGLE (%edi)
|
||||
|
||||
cmpl %edi, %esp
|
||||
/* Jumping to a higher-address frame is always allowed. */
|
||||
jbe .Lok
|
||||
|
||||
/* Passing here, we're either about to do something invalid, or we're
|
||||
executing on an alternative signal stack. */
|
||||
|
||||
/* TODO: need locking? */
|
||||
/* struct hurd_sigstate * _hurd_self_sigstate (void) */
|
||||
call _hurd_self_sigstate
|
||||
/* TODO: %eax and %eax->sigaltstack are always valid? */
|
||||
|
||||
testl $SS_ONSTACK, (HURD_SIGSTATE__SIGALTSTACK__OFFSET + SIGALTSTACK__SS_FLAGS__OFFSET)(%eax)
|
||||
/* Fail if SS_ONSTACK is not set. */
|
||||
jz .Lfail
|
||||
|
||||
movl (HURD_SIGSTATE__SIGALTSTACK__OFFSET + SIGALTSTACK__SS_SP__OFFSET)(%eax), %ebx
|
||||
addl (HURD_SIGSTATE__SIGALTSTACK__OFFSET + SIGALTSTACK__SS_SIZE__OFFSET)(%eax), %ebx
|
||||
subl %edi, %ebx
|
||||
cmpl (HURD_SIGSTATE__SIGALTSTACK__OFFSET + SIGALTSTACK__SS_SIZE__OFFSET)(%eax), %ebx
|
||||
/* TODO: comment this calculation. */
|
||||
jae .Lok
|
||||
|
||||
.Lfail: CALL_FAIL
|
||||
|
||||
.Lok: /* We add unwind information for the target here. */
|
||||
cfi_def_cfa(%ecx, 0)
|
||||
cfi_register(%eip, %edx)
|
||||
cfi_register(%esp, %edi)
|
||||
cfi_offset(%ebx, JB_BX*4)
|
||||
cfi_offset(%esi, JB_SI*4)
|
||||
cfi_offset(%edi, JB_DI*4)
|
||||
cfi_offset(%ebp, JB_BP*4)
|
||||
|
||||
movl 8(%esp), %eax /* Second argument is return value. */
|
||||
movl %edi, %esp
|
||||
|
||||
/* Restore registers. */
|
||||
movl (JB_BX*4)(%ecx), %ebx
|
||||
movl (JB_SI*4)(%ecx), %esi
|
||||
movl (JB_DI*4)(%ecx), %edi
|
||||
movl (JB_BP*4)(%ecx), %ebp
|
||||
cfi_restore(%ebx)
|
||||
cfi_restore(%esi)
|
||||
cfi_restore(%edi)
|
||||
cfi_restore(%ebp)
|
||||
|
||||
/* Jump to saved PC. */
|
||||
jmp *%edx
|
||||
END (____longjmp_chk)
|
||||
10
sysdeps/mach/hurd/i386/signal-defines.sym
Normal file
10
sysdeps/mach/hurd/i386/signal-defines.sym
Normal file
@ -0,0 +1,10 @@
|
||||
#include <hurd/signal.h>
|
||||
#include <signal.h>
|
||||
|
||||
--
|
||||
|
||||
HURD_SIGSTATE__SIGALTSTACK__OFFSET offsetof(struct hurd_sigstate, sigaltstack)
|
||||
|
||||
SIGALTSTACK__SS_SP__OFFSET offsetof(struct sigaltstack, ss_sp)
|
||||
SIGALTSTACK__SS_SIZE__OFFSET offsetof(struct sigaltstack, ss_size)
|
||||
SIGALTSTACK__SS_FLAGS__OFFSET offsetof(struct sigaltstack, ss_flags)
|
||||
Loading…
Reference in New Issue
Block a user