diff options
Diffstat (limited to 'sysdeps/mach/hurd/i386/____longjmp_chk.S')
| -rw-r--r-- | sysdeps/mach/hurd/i386/____longjmp_chk.S | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/sysdeps/mach/hurd/i386/____longjmp_chk.S b/sysdeps/mach/hurd/i386/____longjmp_chk.S deleted file mode 100644 index ac28c94e13..0000000000 --- a/sysdeps/mach/hurd/i386/____longjmp_chk.S +++ /dev/null @@ -1,114 +0,0 @@ -/* Copyright (C) 2001-2017 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) -#ifdef PTR_DEMANGLE - PTR_DEMANGLE (%edx) - PTR_DEMANGLE (%edi) -#endif - - 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) */ -#ifdef PIC - call 1f -1: popl %ebx - addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx -#endif - call JUMPTARGET(_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) |