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Diffstat (limited to 'sysdeps/arm/dl-trampoline.S')
| -rw-r--r-- | sysdeps/arm/dl-trampoline.S | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/sysdeps/arm/dl-trampoline.S b/sysdeps/arm/dl-trampoline.S deleted file mode 100644 index 95d2efc8ea..0000000000 --- a/sysdeps/arm/dl-trampoline.S +++ /dev/null @@ -1,212 +0,0 @@ -/* PLT trampolines. ARM version. - Copyright (C) 2005-2017 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/>. */ - -/* ??? Needs more rearrangement for the LDM to handle thumb mode. */ -#define NO_THUMB -#include <sysdep.h> -#include <libc-symbols.h> - - .text - .globl _dl_runtime_resolve - .type _dl_runtime_resolve, #function - CFI_SECTIONS - cfi_startproc - .align 2 -_dl_runtime_resolve: - cfi_adjust_cfa_offset (4) - cfi_rel_offset (lr, 0) - - @ we get called with - @ stack[0] contains the return address from this call - @ ip contains &GOT[n+3] (pointer to function) - @ lr points to &GOT[2] - - @ Save arguments. We save r4 to realign the stack. - push {r0-r4} - cfi_adjust_cfa_offset (20) - cfi_rel_offset (r0, 0) - cfi_rel_offset (r1, 4) - cfi_rel_offset (r2, 8) - cfi_rel_offset (r3, 12) - - @ get pointer to linker struct - ldr r0, [lr, #-4] - - @ prepare to call _dl_fixup() - @ change &GOT[n+3] into 8*n NOTE: reloc are 8 bytes each - sub r1, ip, lr - sub r1, r1, #4 - add r1, r1, r1 - - @ call fixup routine - bl _dl_fixup - - @ save the return - mov ip, r0 - - @ get arguments and return address back. We restore r4 - @ only to realign the stack. - pop {r0-r4,lr} - cfi_adjust_cfa_offset (-24) - - @ jump to the newly found address - BX(ip) - - cfi_endproc - .size _dl_runtime_resolve, .-_dl_runtime_resolve - -#ifndef PROF - .globl _dl_runtime_profile - .type _dl_runtime_profile, #function - CFI_SECTIONS - cfi_startproc - .align 2 -_dl_runtime_profile: - cfi_adjust_cfa_offset (4) - cfi_rel_offset (lr, 0) - - @ we get called with - @ stack[0] contains the return address from this call - @ ip contains &GOT[n+3] (pointer to function) - @ lr points to &GOT[2] - - @ Stack layout: - @ 212 - saved lr - @ 208 - framesize returned from pltenter - @ 16 - La_arm_regs - @ 8 - Saved two arguments to _dl_profile_fixup - @ 4 - Saved result of _dl_profile_fixup - @ 0 - outgoing argument to _dl_profile_fixup - @ For now, we only save the general purpose registers. - - sub sp, sp, #196 - cfi_adjust_cfa_offset (196) - stmia sp, {r0-r3} - cfi_rel_offset (r0, 0) - cfi_rel_offset (r1, 4) - cfi_rel_offset (r2, 8) - cfi_rel_offset (r3, 12) - - sub sp, sp, #16 - cfi_adjust_cfa_offset (16) - - @ Save sp and lr. - add r0, sp, #216 - str r0, [sp, #32] - ldr r2, [sp, #212] - str r2, [sp, #36] - - @ get pointer to linker struct - ldr r0, [lr, #-4] - - @ prepare to call _dl_profile_fixup() - @ change &GOT[n+3] into 8*n NOTE: reloc are 8 bytes each - sub r1, ip, lr - sub r1, r1, #4 - add r1, r1, r1 - - @ Save these two arguments for pltexit. - add r3, sp, #8 - stmia r3!, {r0,r1} - - @ Set up extra args for _dl_profile_fixup. - @ r2 and r3 are already loaded. - add ip, sp, #208 - str ip, [sp, #0] - - @ call profiling fixup routine - bl _dl_profile_fixup - - @ The address to call is now in r0. - - @ Check whether we're wrapping this function. - ldr ip, [sp, #208] - cmp ip, #0 - bge 1f - cfi_remember_state - - @ save the return - mov ip, r0 - - @ get arguments and return address back - add sp, sp, #16 - cfi_adjust_cfa_offset (-16) - ldmia sp, {r0-r3,sp,lr} - cfi_adjust_cfa_offset (-200) - - @ jump to the newly found address - BX(ip) - - cfi_restore_state -1: - @ The new frame size is in ip. - - @ New stack layout: - @ 268 - saved r7 - @ 264 - saved result of _dl_profile_fixup - @ 72 - La_arm_regs - @ 64 - Saved two arguments to _dl_profile_fixup - @ 0 - La_arm_retval - @ For now, we only save the general purpose registers. - - @ Build the new frame. - str r7, [sp, #212] - cfi_rel_offset (r7, 212) - sub r7, sp, #56 - cfi_def_cfa_register (r7) - cfi_adjust_cfa_offset (56) - sub sp, sp, ip - bic sp, sp, #7 - - @ Save the _dl_profile_fixup result around the call to memcpy. - str r0, [r7, #264] - - @ Copy the stack arguments. - mov r0, sp - add r1, r7, #272 - mov r2, ip - bl memcpy - - @ Call the function. - add ip, r7, #72 - ldmia ip, {r0-r3} - ldr ip, [r7, #264] - BLX(ip) - stmia r7, {r0-r3} - - @ Call pltexit. - add ip, r7, #64 - ldmia ip, {r0,r1} - add r2, r7, #72 - add r3, r7, #0 - bl _dl_call_pltexit - - @ Return to caller. - ldmia r7, {r0-r3} - mov sp, r7 - cfi_def_cfa_register (sp) - ldr r7, [sp, #268] - ldr lr, [sp, #92] - add sp, sp, #272 - cfi_adjust_cfa_offset (-272) - BX(lr) - - cfi_endproc - .size _dl_runtime_profile, .-_dl_runtime_profile -#endif - .previous |