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/* Copyright (C) 2005-2024 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
<https://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <libc-symbols.h>
#include "dl-link.h"
#define ip0 x16
#define ip0l PTR_REG (16)
#define ip1 x17
#define lr x30
/* RELA relocatons are 3 pointers */
#define RELA_SIZE (PTR_SIZE * 3)
.text
.globl _dl_runtime_resolve
.type _dl_runtime_resolve, #function
cfi_startproc
.align 2
_dl_runtime_resolve:
BTI_C
/* AArch64 we get called with:
ip0 &PLTGOT[2]
ip1 temp(dl resolver entry point)
[sp, #8] lr
[sp, #0] &PLTGOT[n]
*/
cfi_rel_offset (lr, 8)
/* Note: Saving x9 is not required by the ABI but the assembler requires
the immediate values of operand 3 to be a multiple of 16 */
stp x8, x9, [sp, #-(80+8*16)]!
cfi_adjust_cfa_offset (80+8*16)
cfi_rel_offset (x8, 0)
cfi_rel_offset (x9, 8)
stp x6, x7, [sp, #16]
cfi_rel_offset (x6, 16)
cfi_rel_offset (x7, 24)
stp x4, x5, [sp, #32]
cfi_rel_offset (x4, 32)
cfi_rel_offset (x5, 40)
stp x2, x3, [sp, #48]
cfi_rel_offset (x2, 48)
cfi_rel_offset (x3, 56)
stp x0, x1, [sp, #64]
cfi_rel_offset (x0, 64)
cfi_rel_offset (x1, 72)
stp q0, q1, [sp, #(80+0*16)]
cfi_rel_offset (q0, 80+0*16)
cfi_rel_offset (q1, 80+1*16)
stp q2, q3, [sp, #(80+2*16)]
cfi_rel_offset (q0, 80+2*16)
cfi_rel_offset (q1, 80+3*16)
stp q4, q5, [sp, #(80+4*16)]
cfi_rel_offset (q0, 80+4*16)
cfi_rel_offset (q1, 80+5*16)
stp q6, q7, [sp, #(80+6*16)]
cfi_rel_offset (q0, 80+6*16)
cfi_rel_offset (q1, 80+7*16)
/* Get pointer to linker struct. */
ldr PTR_REG (0), [ip0, #-PTR_SIZE]
/* Prepare to call _dl_fixup(). */
ldr x1, [sp, 80+8*16] /* Recover &PLTGOT[n] */
sub x1, x1, ip0
add x1, x1, x1, lsl #1
lsl x1, x1, #3
sub x1, x1, #(RELA_SIZE<<3)
lsr x1, x1, #3
/* Call fixup routine. */
bl _dl_fixup
/* Save the return. */
mov ip0, x0
/* Get arguments and return address back. */
ldp q0, q1, [sp, #(80+0*16)]
ldp q2, q3, [sp, #(80+2*16)]
ldp q4, q5, [sp, #(80+4*16)]
ldp q6, q7, [sp, #(80+6*16)]
ldp x0, x1, [sp, #64]
ldp x2, x3, [sp, #48]
ldp x4, x5, [sp, #32]
ldp x6, x7, [sp, #16]
ldp x8, x9, [sp], #(80+8*16)
cfi_adjust_cfa_offset (-(80+8*16))
ldp ip1, lr, [sp], #16
cfi_adjust_cfa_offset (-16)
/* Jump to the newly found address. */
br ip0
cfi_endproc
.size _dl_runtime_resolve, .-_dl_runtime_resolve
#if !defined PROF && defined SHARED
.globl _dl_runtime_profile
.type _dl_runtime_profile, #function
cfi_startproc
.align 2
_dl_runtime_profile:
# if HAVE_AARCH64_PAC_RET
PACIASP
cfi_window_save
# else
BTI_C
# endif
/* AArch64 we get called with:
ip0 &PLTGOT[2]
ip1 temp(dl resolver entry point)
[sp, #8] lr
[sp, #0] &PLTGOT[n]
Stack frame layout:
[sp, #...] lr
[sp, #...] &PLTGOT[n]
[sp, #256] La_aarch64_regs
[sp, #48] La_aarch64_retval
[sp, #40] frame size return from pltenter
[sp, #32] dl_profile_call saved x1
[sp, #24] dl_profile_call saved x0
[sp, #16] t1
[sp, #0] x29, lr <- x29
*/
# define OFFSET_T1 16
# define OFFSET_SAVED_CALL_X0 OFFSET_T1 + 8
# define OFFSET_FS OFFSET_SAVED_CALL_X0 + 16
# define OFFSET_RV OFFSET_FS + 8
# define OFFSET_RG OFFSET_RV + DL_SIZEOF_RV
# define SF_SIZE OFFSET_RG + DL_SIZEOF_RG
# define OFFSET_PLTGOTN SF_SIZE
# define OFFSET_LR OFFSET_PLTGOTN + 8
/* Save arguments. */
sub sp, sp, #SF_SIZE
cfi_adjust_cfa_offset (SF_SIZE)
stp x29, x30, [SP, #0]
mov x29, sp
cfi_def_cfa_register (x29)
cfi_rel_offset (x29, 0)
cfi_rel_offset (lr, 8)
stp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*0]
cfi_rel_offset (x0, OFFSET_RG + DL_OFFSET_RG_X0 + 16*0 + 0)
cfi_rel_offset (x1, OFFSET_RG + DL_OFFSET_RG_X0 + 16*0 + 8)
stp x2, x3, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*1]
cfi_rel_offset (x2, OFFSET_RG + DL_OFFSET_RG_X0 + 16*1 + 0)
cfi_rel_offset (x3, OFFSET_RG + DL_OFFSET_RG_X0 + 16*1 + 8)
stp x4, x5, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*2]
cfi_rel_offset (x4, OFFSET_RG + DL_OFFSET_RG_X0 + 16*2 + 0)
cfi_rel_offset (x5, OFFSET_RG + DL_OFFSET_RG_X0 + 16*2 + 8)
stp x6, x7, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*3]
cfi_rel_offset (x6, OFFSET_RG + DL_OFFSET_RG_X0 + 16*3 + 0)
cfi_rel_offset (x7, OFFSET_RG + DL_OFFSET_RG_X0 + 16*3 + 8)
str x8, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*4 + 0]
cfi_rel_offset (x8, OFFSET_RG + DL_OFFSET_RG_X0 + 16*4 + 0)
/* Note 8 bytes of padding is in the stack frame for alignment */
stp q0, q1, [X29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*0]
cfi_rel_offset (q0, OFFSET_RG + DL_OFFSET_RG_V0 + 32*0)
cfi_rel_offset (q1, OFFSET_RG + DL_OFFSET_RG_V0 + 32*0 + 16)
stp q2, q3, [X29, #OFFSET_RG+ DL_OFFSET_RG_V0 + 32*1]
cfi_rel_offset (q2, OFFSET_RG + DL_OFFSET_RG_V0 + 32*1 + 0)
cfi_rel_offset (q3, OFFSET_RG + DL_OFFSET_RG_V0 + 32*1 + 16)
stp q4, q5, [X29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*2]
cfi_rel_offset (q4, OFFSET_RG + DL_OFFSET_RG_V0 + 32*2 + 0)
cfi_rel_offset (q5, OFFSET_RG + DL_OFFSET_RG_V0 + 32*2 + 16)
stp q6, q7, [X29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*3]
cfi_rel_offset (q6, OFFSET_RG + DL_OFFSET_RG_V0 + 32*3 + 0)
cfi_rel_offset (q7, OFFSET_RG + DL_OFFSET_RG_V0 + 32*3 + 16)
/* No APCS extension supported. */
str xzr, [X29, #OFFSET_RG + DL_OFFSET_RG_VPCS]
add x0, x29, #SF_SIZE + 16
ldr x1, [x29, #OFFSET_LR]
stp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_SP]
/* Get pointer to linker struct. */
ldr PTR_REG (0), [ip0, #-PTR_SIZE]
/* Prepare to call _dl_profile_fixup(). */
ldr x1, [x29, OFFSET_PLTGOTN] /* Recover &PLTGOT[n] */
sub x1, x1, ip0
add x1, x1, x1, lsl #1
lsl x1, x1, #3
sub x1, x1, #(RELA_SIZE<<3)
lsr x1, x1, #3
stp x0, x1, [x29, #OFFSET_SAVED_CALL_X0]
/* Set up extra args for _dl_profile_fixup */
ldr x2, [x29, #OFFSET_LR] /* load saved LR */
add x3, x29, #OFFSET_RG /* address of La_aarch64_reg */
add x4, x29, #OFFSET_FS /* address of framesize */
bl _dl_profile_fixup
ldr ip0l, [x29, #OFFSET_FS] /* framesize == 0 */
cmp ip0l, #0
bge 1f
cfi_remember_state
/* Save the return. */
mov ip0, x0
/* Get arguments and return address back. */
ldp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*0]
ldp x2, x3, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*1]
ldp x4, x5, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*2]
ldp x6, x7, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*3]
ldr x8, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*4]
ldp q0, q1, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*0]
ldp q2, q3, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*1]
ldp q4, q5, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*2]
ldp q6, q7, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*3]
cfi_def_cfa_register (sp)
ldp x29, x30, [x29, #0]
cfi_restore(x29)
cfi_restore(x30)
# if HAVE_AARCH64_PAC_RET
add sp, sp, SF_SIZE
cfi_adjust_cfa_offset (-SF_SIZE)
AUTIASP
cfi_window_save
add sp, sp, 16
cfi_adjust_cfa_offset (-16)
# else
add sp, sp, SF_SIZE + 16
cfi_adjust_cfa_offset (- SF_SIZE - 16)
# endif
/* Jump to the newly found address. */
br ip0
cfi_restore_state
1:
/* The new frame size is in ip0. */
sub PTR_REG (1), PTR_REG (29), ip0l
and sp, x1, #0xfffffffffffffff0
str x0, [x29, #OFFSET_T1]
mov x0, sp
add x1, x29, #SF_SIZE + 16
mov x2, ip0
bl memcpy
ldr ip0, [x29, #OFFSET_T1]
/* Call the function. */
ldp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*0]
ldp x2, x3, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*1]
ldp x4, x5, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*2]
ldp x6, x7, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*3]
ldr x8, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*4]
ldp q0, q1, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*0]
ldp q2, q3, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*1]
ldp q4, q5, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*2]
ldp q6, q7, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*3]
blr ip0
stp x0, x1, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*0]
stp x2, x3, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*1]
stp x4, x5, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*2]
stp x6, x7, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*3]
stp q0, q1, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*0]
stp q2, q3, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*1]
stp q4, q5, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*2]
stp q6, q7, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*3]
str xzr, [X29, #OFFSET_RV + DL_OFFSET_RV_VPCS]
/* Setup call to pltexit */
ldp x0, x1, [x29, #OFFSET_SAVED_CALL_X0]
add x2, x29, #OFFSET_RG
add x3, x29, #OFFSET_RV
bl _dl_audit_pltexit
ldp x0, x1, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*0]
ldp x2, x3, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*1]
ldp x4, x5, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*2]
ldp x6, x7, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*3]
ldp q0, q1, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*0]
ldp q2, q3, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*1]
ldp q4, q5, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*2]
ldp q6, q7, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*3]
/* LR from within La_aarch64_reg */
ldr lr, [x29, #OFFSET_RG + DL_OFFSET_RG_LR]
cfi_restore(lr)
# if HAVE_AARCH64_PAC_RET
/* Note: LR restored from La_aarch64_reg has no PAC. */
cfi_window_save
# endif
mov sp, x29
cfi_def_cfa_register (sp)
ldr x29, [x29, #0]
cfi_restore(x29)
add sp, sp, SF_SIZE + 16
cfi_adjust_cfa_offset (- SF_SIZE - 16)
br lr
cfi_endproc
.size _dl_runtime_profile, .-_dl_runtime_profile
#endif
.previous
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