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| author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
|---|---|---|
| committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
| commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
| tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /REORG.TODO/sysdeps/unix/sysv/linux/powerpc/powerpc32/____longjmp_chk.S | |
| parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
| download | glibc-5046dbb4a7eba5eccfd258f92f4735c9ffc8d069.tar.gz | |
Prepare for radical source tree reorganization.zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).
Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/powerpc/powerpc32/____longjmp_chk.S')
| -rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/powerpc/powerpc32/____longjmp_chk.S | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/powerpc/powerpc32/____longjmp_chk.S b/REORG.TODO/sysdeps/unix/sysv/linux/powerpc/powerpc32/____longjmp_chk.S new file mode 100644 index 0000000000..f61398c6b2 --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/powerpc/powerpc32/____longjmp_chk.S @@ -0,0 +1,76 @@ +/* Copyright (C) 2009-2017 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 <rtld-global-offsets.h> + + .section .rodata.str1.4,"aMS",@progbits,1 + .align 2 +.LC0: + .string "longjmp causes uninitialized stack frame" + .text + +#define __longjmp_symbol ____longjmp_chk + +#ifdef PIC +# define LOAD_ARG \ + SETUP_GOT_ACCESS(r3,got_label2); \ + addis r3,r3,_GLOBAL_OFFSET_TABLE_-got_label2@ha; \ + addi r3,r3,_GLOBAL_OFFSET_TABLE_-got_label2@l; \ + lwz r3,.LC0@got(r3) +#else +# define LOAD_ARG \ + lis r3,.LC0@ha; \ + la r3,.LC0@l(r3) +#endif + +#define CHECK_SP(reg) \ + cmplw reg, r1; \ + bge+ .Lok; \ + mflr r0; \ + stwu r1,-32(r1); \ + cfi_remember_state; \ + cfi_adjust_cfa_offset (32); \ + stw r0,36(r1); \ + cfi_offset (lr, 4); \ + mr r31,r3; \ + mr r30,r4; \ + li r3,0; \ + addi r4,r1,8; \ + li r0,__NR_sigaltstack; \ + sc; \ + /* Without working sigaltstack we cannot perform the test. */ \ + bso .Lok2; \ + lwz r0,12(r1); \ + andi. r3,r0,1; \ + beq .Lfail; \ + lwz r0,16(r1); \ + lwz r3,8(r1); \ + add r3,r3,r0; \ + sub r3,r3,reg; \ + cmplw r3,r0; \ + bge+ .Lok2; \ +.Lfail: \ + LOAD_ARG; \ + bl HIDDEN_JUMPTARGET (__fortify_fail); \ +.Lok2: \ + mr r3,r31; \ + mr r4,r30; \ + cfi_restore_state; \ +.Lok: + +#include <__longjmp-common.S> |