| /* Copyright (C) 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. */ |
| |
| /* longjmp is implemented in terms of the setcontext trap on Linux/Sparc64. */ |
| |
| #include <sysdep.h> |
| |
| /* Offsets into the jmp_buf structure. */ |
| |
| #define O_mask_was_saved 512 |
| #define O_gregs 32 |
| #define O_g1 (O_gregs + 4*8) |
| #define O_sp (O_gregs + 17*8) |
| |
| .section .rodata.str1.1,"aMS",@progbits,1 |
| .type longjmp_msg,@object |
| longjmp_msg: |
| .string "longjmp causes uninitialized stack frame" |
| .size longjmp_msg, .-longjmp_msg |
| |
| .text |
| ENTRY (____longjmp_chk) |
| ldx [%o0 + O_sp], %o2 |
| cmp %sp, %o2 |
| bleu,pt %xcc, .Lok |
| nop |
| |
| save %sp, -128, %sp |
| |
| #ifdef PIC |
| 1: call 2f |
| sethi %hi(_GLOBAL_OFFSET_TABLE_-(1b-.)), %l7 |
| 2: or %l7, %lo(_GLOBAL_OFFSET_TABLE_-(1b-.)), %l7 |
| add %l7, %o7, %l7 |
| #endif |
| sethi %hi(longjmp_msg), %o0 |
| or %o0, %lo(longjmp_msg), %o0 |
| #ifdef PIC |
| ldx [%l7 + %o0], %o0 |
| #endif |
| call HIDDEN_JUMPTARGET(__fortify_fail) |
| nop |
| |
| restore |
| |
| .Lok: |
| /* Modify the context with the value we want to return. */ |
| movre %o1, 1, %o1 |
| stx %o1, [%o0 + O_g1] |
| |
| /* Let setcontext know if we want to modify the current sigmask. */ |
| ld [%o0 + O_mask_was_saved], %o1 |
| |
| /* And bamf back to where we belong! */ |
| ta 0x6f |
| END(____longjmp_chk) |
