mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 00:31:08 +00:00
145 lines
3.7 KiB
ArmAsm
145 lines
3.7 KiB
ArmAsm
/* Copyright (C) 1992-2016 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
|