| /* Copyright (C) 2009-2018 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 <sigaltstack-offsets.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 |
| .text |
| |
| #define __longjmp ____longjmp_chk |
| |
| #ifdef PIC |
| # define CALL_FAIL \ |
| mov.l .Lfail, r1; \ |
| mov.l .Lstr, r4; \ |
| mov.l r12, @-r15; \ |
| cfi_remember_state; \ |
| cfi_adjust_cfa_offset (4); \ |
| cfi_rel_offset (r12, 0); \ |
| mova .Lgot, r0; \ |
| mov.l .Lgot, r12; \ |
| add r0, r12; \ |
| sts.l pr, @-r15; \ |
| cfi_adjust_cfa_offset (4); \ |
| cfi_rel_offset (pr, 0); \ |
| bsrf r1; \ |
| add r12, r4; \ |
| .Lfail0: \ |
| /* Unreachable. */ \ |
| .align 2; \ |
| .Lgot: \ |
| .long _GLOBAL_OFFSET_TABLE_; \ |
| .Lstr: \ |
| .long longjmp_msg@GOTOFF; \ |
| .Lfail: \ |
| .long __GI___fortify_fail@PLT-(.Lfail0-.); \ |
| cfi_restore_state; |
| #else |
| # define CALL_FAIL \ |
| mov.l .Lfail, r1; \ |
| mov.l .Lstr, r4; \ |
| sts.l pr, @-r15; \ |
| cfi_remember_state; \ |
| cfi_adjust_cfa_offset (4); \ |
| cfi_rel_offset (pr, 0); \ |
| jsr @r1; \ |
| nop; \ |
| /* Unreachable. */ \ |
| .align 2; \ |
| .Lstr: \ |
| .long longjmp_msg; \ |
| .Lfail: \ |
| .long __fortify_fail; \ |
| cfi_restore_state; |
| #endif |
| |
| #define CHECK_SP(reg) \ |
| /* Jumping to a higher-address frame is always allowed. */ \ |
| cmp/hs r15, reg; \ |
| bt .Lok; \ |
| \ |
| mov.l r0, @-r15; /* The return value is already in here. */ \ |
| cfi_adjust_cfa_offset (4); \ |
| mov.l r1, @-r15; /* PTR_DEMANGLE helper. */ \ |
| cfi_adjust_cfa_offset (4); \ |
| mov.l r2, @-r15; /* The new SP value is already in here. */ \ |
| cfi_adjust_cfa_offset (4); \ |
| mov.l r4, @-r15; /* We'll still need this one. */ \ |
| cfi_adjust_cfa_offset (4); \ |
| add #-sizeSS, r15; \ |
| cfi_adjust_cfa_offset (sizeSS); \ |
| mov #0, r4; \ |
| mov r15, r5; \ |
| DO_CALL (sigaltstack, 2); \ |
| /* Without working sigaltstack we cannot perform the test. */ \ |
| tst r0, r0; \ |
| bf .Lok2; \ |
| mov.l @(oSS_FLAGS, r15), r0; \ |
| tst #SS_ONSTACK, r0; \ |
| bt .Lcall_fail; \ |
| mov.l @(oSS_SIZE, r15), r2; \ |
| mov.l @(oSS_SP, r15), r1; \ |
| add r2, r1; \ |
| sub r8, r1; \ |
| cmp/hi r1, r2; \ |
| bf .Lok2; \ |
| .Lcall_fail: \ |
| CALL_FAIL \ |
| \ |
| .Lok2: \ |
| add #sizeSS, r15; \ |
| cfi_adjust_cfa_offset (-sizeSS); \ |
| mov.l @r15+, r4; \ |
| cfi_adjust_cfa_offset (-4); \ |
| mov.l @r15+, r2; \ |
| cfi_adjust_cfa_offset (-4); \ |
| mov.l @r15+, r1; \ |
| cfi_adjust_cfa_offset (-4); \ |
| mov.l @r15+, r0; \ |
| cfi_adjust_cfa_offset (-4); \ |
| .Lok: |
| |
| #include <__longjmp.S> |