mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-22 19:00:07 +00:00
80 lines
2.3 KiB
ArmAsm
80 lines
2.3 KiB
ArmAsm
/* PLT trampolines. Nios II version.
|
|
Copyright (C) 2005-2015 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 <libc-symbols.h>
|
|
|
|
.text
|
|
.globl _dl_runtime_resolve
|
|
cfi_startproc
|
|
_dl_runtime_resolve:
|
|
/* The runtime resolver receives the original function arguments in r4
|
|
through r7, the shared library identifier from GOT[1]? in r14, and the
|
|
relocation index times four in r15. It updates the corresponding PLT GOT
|
|
entry so that the PLT entry will transfer control directly to the target
|
|
in the future, and then transfers control to the target. */
|
|
/* Save arguments and return address. */
|
|
subi sp, sp, 28
|
|
cfi_adjust_cfa_offset (28)
|
|
stw r22, 24(sp)
|
|
cfi_rel_offset (r22, 24)
|
|
stw r8, 20(sp) /* save r8, because this might be a call to mcount */
|
|
cfi_rel_offset (r8, 20)
|
|
stw r7, 16(sp)
|
|
cfi_rel_offset (r7, 16)
|
|
stw r6, 12(sp)
|
|
cfi_rel_offset (r6, 12)
|
|
stw r5, 8(sp)
|
|
cfi_rel_offset (r5, 8)
|
|
stw r4, 4(sp)
|
|
cfi_rel_offset (r4, 4)
|
|
stw ra, 0(sp)
|
|
cfi_rel_offset (ra, 0)
|
|
|
|
/* Get pointer to linker struct. */
|
|
mov r4, r14
|
|
|
|
/* Get the relocation offset. We're given a multiple of 4 and
|
|
need a multiple of 12, so multiply by 3. */
|
|
slli r5, r15, 1
|
|
add r5, r5, r15
|
|
|
|
/* Call the fixup routine. */
|
|
nextpc r22
|
|
1: movhi r2, %hiadj(_gp_got - 1b)
|
|
addi r2, r2, %lo(_gp_got - 1b)
|
|
add r22, r22, r2
|
|
ldw r2, %call(_dl_fixup)(r22)
|
|
callr r2
|
|
|
|
/* Restore the arguments and return address. */
|
|
ldw ra, 0(sp)
|
|
ldw r4, 4(sp)
|
|
ldw r5, 8(sp)
|
|
ldw r6, 12(sp)
|
|
ldw r7, 16(sp)
|
|
ldw r8, 20(sp)
|
|
ldw r22, 24(sp)
|
|
addi sp, sp, 28
|
|
cfi_adjust_cfa_offset (-28)
|
|
|
|
/* Jump to the newly found address. */
|
|
jmp r2
|
|
|
|
cfi_endproc
|