diff options
Diffstat (limited to 'ports/sysdeps/unix/sysv/linux/alpha/____longjmp_chk.S')
| -rw-r--r-- | ports/sysdeps/unix/sysv/linux/alpha/____longjmp_chk.S | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/alpha/____longjmp_chk.S b/ports/sysdeps/unix/sysv/linux/alpha/____longjmp_chk.S deleted file mode 100644 index d6ca4c1853..0000000000 --- a/ports/sysdeps/unix/sysv/linux/alpha/____longjmp_chk.S +++ /dev/null @@ -1,144 +0,0 @@ -/* Copyright (C) 1992-2014 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> - - - .section .rodata.str1.1,"aMS",@progbits,1 - .type longjmp_msg,@object -longjmp_msg: - .string "longjmp causes uninitialized stack frame" - .size longjmp_msg, .-longjmp_msg - - -/* Jump to the position specified by ENV, causing the - setjmp call there to return VAL, or 1 if VAL is 0. - void __longjmp (__jmp_buf env, int val). */ - .text - .align 4 - .globl ____longjmp_chk - .type ____longjmp_chk, @function - .usepv ____longjmp_chk, std - - cfi_startproc -____longjmp_chk: - ldgp gp, 0(pv) -#ifdef PROF - .set noat - lda AT, _mcount - jsr AT, (AT), _mcount - .set at -#endif - - ldq s2, JB_PC*8(a0) - mov a0, s0 - ldq fp, JB_FP*8(a0) - mov a1, s1 - ldq s3, JB_SP*8(a0) - cmoveq s1, 1, s1 - -#ifdef PTR_DEMANGLE - PTR_DEMANGLE(s2, t1) - PTR_DEMANGLE2(s3, t1) - PTR_DEMANGLE2(fp, t1) -#endif - /* ??? While this is a proper test for detecting a longjmp to an - invalid frame within any given stack, the main thread stack is - located *below* almost everything in the address space. Which - means that the test at Lfail vs the signal stack will almost - certainly never pass. We ought bounds check top and bottom of - the current thread's stack. */ - cmpule s3, sp, t1 - bne t1, $Lfail - - .align 4 -$Lok: - mov s0, a0 - mov s1, v0 - mov s3, t0 - mov s2, ra - cfi_remember_state - cfi_def_cfa(a0, 0) - cfi_register(sp, t0) - cfi_offset(s0, JB_S0*8) - cfi_offset(s1, JB_S1*8) - cfi_offset(s2, JB_S2*8) - cfi_offset(s3, JB_S3*8) - cfi_offset(s4, JB_S4*8) - cfi_offset(s5, JB_S5*8) - cfi_offset(s3, JB_S3*8) - cfi_offset($f2, JB_F2*8) - cfi_offset($f3, JB_F3*8) - cfi_offset($f4, JB_F4*8) - cfi_offset($f5, JB_F5*8) - cfi_offset($f6, JB_F6*8) - cfi_offset($f7, JB_F7*8) - cfi_offset($f8, JB_F8*8) - cfi_offset($f9, JB_F9*8) - ldq s0, JB_S0*8(a0) - ldq s1, JB_S1*8(a0) - ldq s2, JB_S2*8(a0) - ldq s3, JB_S3*8(a0) - ldq s4, JB_S4*8(a0) - ldq s5, JB_S5*8(a0) - ldt $f2, JB_F2*8(a0) - ldt $f3, JB_F3*8(a0) - ldt $f4, JB_F4*8(a0) - ldt $f5, JB_F5*8(a0) - ldt $f6, JB_F6*8(a0) - ldt $f7, JB_F7*8(a0) - ldt $f8, JB_F8*8(a0) - ldt $f9, JB_F9*8(a0) - mov t0, sp - ret - - .align 4 -$Lfail: - cfi_restore_state - lda v0, __NR_sigaltstack - lda a0, 0 - lda a1, -32(sp) - lda sp, -32(sp) - cfi_adjust_cfa_offset(32) - callsys - ldq t0, 0(sp) /* ss_sp */ - ldl t1, 8(sp) /* ss_flags */ - ldq t2, 16(sp) /* ss_size */ - lda sp, 32(sp) - cfi_adjust_cfa_offset(-32) - - /* Without working sigaltstack we cannot perform the test. */ - bne a3, $Lok - - addq t0, t2, t0 /* t0 = ss_sp + ss_size */ - subq t0, s3, t0 /* t0 = (ss_sp + ss_size) - new_sp */ - cmpule t2, t0, t0 /* t0 = (t0 >= ss_size) */ - and t0, t1, t0 /* t0 = (t0 >= ss_size) & (ss_flags & SS_ONSTACK) */ - bne t0, $Lok - - ldah a0, longjmp_msg(gp) !gprelhigh - lda a0, longjmp_msg(a0) !gprellow -#ifdef PIC - jsr ra, HIDDEN_JUMPTARGET(__fortify_fail) -#else - bsr ra, HIDDEN_JUMPTARGET(__fortify_fail) !samegp -#endif - bugchk - - cfi_endproc - .size ____longjmp_chk, .-____longjmp_chk |