-/* Copyright (C) 2001,2004,2005,2006,2009 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. */
-
- .section .rodata.str1.1,"aMS",@progbits,1
- .type longjmp_msg,@object
-longjmp_msg:
- .string "longjmp causes uninitialized stack frame"
- .size longjmp_msg, .-longjmp_msg
-
-
-#define __longjmp ____longjmp_chk
-
-#ifdef PIC
-# define CALL_FAIL movl %ebx, %ecx; \
- cfi_register(%ebx,%ecx); \
- LOAD_PIC_REG (bx); \
- leal longjmp_msg@GOTOFF(%ebx), %eax; \
- call __GI___fortify_fail@PLT
-#else
-# define CALL_FAIL movl $longjmp_msg, %eax; \
- call __fortify_fail
-#endif
-
-#define CHECK_ESP(reg) \
- cmpl reg, %esp; \
- jbe .Lok; \
- CALL_FAIL; \
-.Lok:
-
-#include "__longjmp.S"
+#error "OS-specific version needed"
#include <sysdep.h>
#include <jmpbuf-offsets.h>
#include <asm-syntax.h>
-#include <bp-sym.h>
-#include <bp-asm.h>
-
-#define PARMS LINKAGE /* no space for saved regs */
-#define JBUF PARMS
-#define VAL JBUF+PTR_SIZE
.text
-ENTRY (BP_SYM (__longjmp))
- ENTER
-
+ENTRY (__longjmp)
#ifdef PTR_DEMANGLE
- movl JBUF(%esp), %eax /* User's jmp_buf in %eax. */
- CHECK_BOUNDS_BOTH_WIDE (%eax, JBUF(%esp), $JB_SIZE)
+ movl 4(%esp), %eax /* User's jmp_buf in %eax. */
/* Save the return address now. */
movl (JB_PC*4)(%eax), %edx
cfi_restore(%edi)
cfi_restore(%ebp)
- movl VAL(%esp), %eax /* Second argument is return value. */
+ movl 8(%esp), %eax /* Second argument is return value. */
movl %ecx, %esp
#else
- movl JBUF(%esp), %ecx /* User's jmp_buf in %ecx. */
- CHECK_BOUNDS_BOTH_WIDE (%ecx, JBUF(%esp), $JB_SIZE)
+ movl 4(%esp), %ecx /* User's jmp_buf in %ecx. */
# ifdef CHECK_ESP
movl (JB_SP*4)(%ecx), %eax
CHECK_ESP (%eax)
# endif
- movl VAL(%esp), %eax /* Second argument is return value. */
+ movl 8(%esp), %eax /* Second argument is return value. */
/* Save the return address now. */
movl (JB_PC*4)(%ecx), %edx
/* Restore registers. */
#endif
/* Jump to saved PC. */
jmp *%edx
-END (BP_SYM (__longjmp))
+END (__longjmp)
--- /dev/null
+/* Copyright (C) 2001,2004,2005,2006,2009 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>
+#include <jmpbuf-offsets.h>
+#include <asm-syntax.h>
+
+
+ .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; \
+ cfi_register(%ebx,%ecx); \
+ LOAD_PIC_REG (bx); \
+ leal longjmp_msg@GOTOFF(%ebx), %eax; \
+ call __GI___fortify_fail@PLT
+#else
+# define CALL_FAIL movl $longjmp_msg, %eax; \
+ call __fortify_fail
+#endif
+
+#define CHECK_ESP(reg) \
+ cmpl reg, %esp; \
+ jbe .Lok; \
+ CALL_FAIL; \
+.Lok:
+
+
+ .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)
+
+ pushl $0
+ cfi_adjust_cfa_offset(4)
+ cmpl %edi, %esp
+ jbe .Lok
+
+ subl $12, %esp
+ cfi_adjust_cfa_offset(12)
+ xorl %ebx, %ebx
+ movl %esp, %ecx
+ movl $__NR_sigaltstack, %eax
+ ENTER_KERNEL
+ movl 4(%esp), %ebx
+ addl $12, %esp
+ cfi_adjust_cfa_offset(-12)
+ movl 8(%esp), %ecx
+ testl %eax, %eax
+ jne .Lok
+ andl $1, %ebx
+ movl %ebx, (%esp)
+.Lok:
+ 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 12(%esp), %eax /* Second argument is return value. */
+ xchgl %edi, %esp
+ cfi_restore(%edi)
+
+ cmpl %esp, %edi
+ jnbe .Lcheck
+
+ /* Restore registers. */
+.Lout: 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
+
+ cfi_def_cfa(%ecx, 0)
+ cfi_register(%eip, %edx)
+ cfi_offset(%ebx, JB_BX*4)
+ cfi_offset(%esi, JB_SI*4)
+ cfi_offset(%edi, JB_DI*4)
+ cfi_offset(%ebp, JB_BP*4)
+
+.Lcheck:
+ cmpl $0, (%edi)
+ je .Lfail
+
+ subl $12, %esp
+ cfi_adjust_cfa_offset(12)
+ xorl %ebx, %ebx
+ movl %esp, %ecx
+ movl $__NR_sigaltstack, %eax
+ ENTER_KERNEL
+ testl $1, 4(%esp)
+ leal 12(%esp), %esp
+ movl 8(%edi), %ecx
+ movl 12(%edi), %eax
+ cfi_adjust_cfa_offset(-12)
+ je .Lout
+
+.Lfail: xchgl %edi, %esp
+ cfi_def_cfa(%esp, 8)
+ cfi_restore(%esp)
+ cfi_restore(%ebx)
+ cfi_restore(%esi)
+ cfi_undefined(%edi)
+ cfi_restore(%ebp)
+
+ CALL_FAIL
+ hlt
+END (____longjmp_chk)
projects / external / glibc.git / commitdiff