1 /* Copyright (C) 2009 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
18 /* longjmp is implemented in terms of the setcontext trap on Linux/Sparc64. */
22 /* Offsets into the jmp_buf structure. */
24 #define O_mask_was_saved 512
26 #define O_g1 (O_gregs + 4*8)
27 #define O_sp (O_gregs + 17*8)
29 .section .rodata.str1.1,"aMS",@progbits,1
30 .type longjmp_msg,@object
32 .string "longjmp causes uninitialized stack frame"
33 .size longjmp_msg, .-longjmp_msg
36 ENTRY (____longjmp_chk)
44 cfi_def_cfa_register(%fp)
46 cfi_register(%o7, %i7)
49 LOADSYSCALL(sigaltstack)
52 lduw [%fp + 2031], %l2
57 sub %l0, STACK_BIAS, %l0
67 sethi %hi(_GLOBAL_OFFSET_TABLE_-(1b-.)), %l7
68 2: or %l7, %lo(_GLOBAL_OFFSET_TABLE_-(1b-.)), %l7
71 sethi %hi(longjmp_msg), %o0
72 or %o0, %lo(longjmp_msg), %o0
76 call HIDDEN_JUMPTARGET(__fortify_fail)
83 /* Modify the context with the value we want to return. */
87 /* Let setcontext know if we want to modify the current sigmask. */
88 ld [%o0 + O_mask_was_saved], %o1
90 /* And bamf back to where we belong! */