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342 lines
9.8 KiB
ArmAsm
342 lines
9.8 KiB
ArmAsm
/* Copyright (C) 2005-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<https://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <libc-symbols.h>
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#include "dl-link.h"
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#define ip0 x16
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#define ip0l PTR_REG (16)
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#define ip1 x17
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#define lr x30
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/* RELA relocatons are 3 pointers */
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#define RELA_SIZE (PTR_SIZE * 3)
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.text
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.globl _dl_runtime_resolve
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.type _dl_runtime_resolve, #function
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cfi_startproc
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.align 2
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_dl_runtime_resolve:
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BTI_C
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/* AArch64 we get called with:
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ip0 &PLTGOT[2]
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ip1 temp(dl resolver entry point)
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[sp, #8] lr
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[sp, #0] &PLTGOT[n]
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*/
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cfi_rel_offset (lr, 8)
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/* Note: Saving x9 is not required by the ABI but the assembler requires
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the immediate values of operand 3 to be a multiple of 16 */
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stp x8, x9, [sp, #-(80+8*16)]!
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cfi_adjust_cfa_offset (80+8*16)
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cfi_rel_offset (x8, 0)
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cfi_rel_offset (x9, 8)
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stp x6, x7, [sp, #16]
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cfi_rel_offset (x6, 16)
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cfi_rel_offset (x7, 24)
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stp x4, x5, [sp, #32]
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cfi_rel_offset (x4, 32)
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cfi_rel_offset (x5, 40)
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stp x2, x3, [sp, #48]
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cfi_rel_offset (x2, 48)
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cfi_rel_offset (x3, 56)
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stp x0, x1, [sp, #64]
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cfi_rel_offset (x0, 64)
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cfi_rel_offset (x1, 72)
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stp q0, q1, [sp, #(80+0*16)]
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cfi_rel_offset (q0, 80+0*16)
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cfi_rel_offset (q1, 80+1*16)
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stp q2, q3, [sp, #(80+2*16)]
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cfi_rel_offset (q0, 80+2*16)
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cfi_rel_offset (q1, 80+3*16)
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stp q4, q5, [sp, #(80+4*16)]
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cfi_rel_offset (q0, 80+4*16)
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cfi_rel_offset (q1, 80+5*16)
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stp q6, q7, [sp, #(80+6*16)]
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cfi_rel_offset (q0, 80+6*16)
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cfi_rel_offset (q1, 80+7*16)
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/* Get pointer to linker struct. */
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ldr PTR_REG (0), [ip0, #-PTR_SIZE]
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/* Prepare to call _dl_fixup(). */
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ldr x1, [sp, 80+8*16] /* Recover &PLTGOT[n] */
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sub x1, x1, ip0
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add x1, x1, x1, lsl #1
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lsl x1, x1, #3
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sub x1, x1, #(RELA_SIZE<<3)
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lsr x1, x1, #3
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/* Call fixup routine. */
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bl _dl_fixup
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/* Save the return. */
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mov ip0, x0
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/* Get arguments and return address back. */
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ldp q0, q1, [sp, #(80+0*16)]
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ldp q2, q3, [sp, #(80+2*16)]
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ldp q4, q5, [sp, #(80+4*16)]
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ldp q6, q7, [sp, #(80+6*16)]
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ldp x0, x1, [sp, #64]
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ldp x2, x3, [sp, #48]
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ldp x4, x5, [sp, #32]
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ldp x6, x7, [sp, #16]
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ldp x8, x9, [sp], #(80+8*16)
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cfi_adjust_cfa_offset (-(80+8*16))
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ldp ip1, lr, [sp], #16
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cfi_adjust_cfa_offset (-16)
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/* Jump to the newly found address. */
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br ip0
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cfi_endproc
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.size _dl_runtime_resolve, .-_dl_runtime_resolve
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#if !defined PROF && defined SHARED
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.globl _dl_runtime_profile
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.type _dl_runtime_profile, #function
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cfi_startproc
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.align 2
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_dl_runtime_profile:
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# if HAVE_AARCH64_PAC_RET
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PACIASP
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cfi_window_save
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# else
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BTI_C
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# endif
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/* AArch64 we get called with:
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ip0 &PLTGOT[2]
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ip1 temp(dl resolver entry point)
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[sp, #8] lr
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[sp, #0] &PLTGOT[n]
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Stack frame layout:
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[sp, #...] lr
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[sp, #...] &PLTGOT[n]
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[sp, #256] La_aarch64_regs
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[sp, #48] La_aarch64_retval
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[sp, #40] frame size return from pltenter
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[sp, #32] dl_profile_call saved x1
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[sp, #24] dl_profile_call saved x0
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[sp, #16] t1
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[sp, #0] x29, lr <- x29
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*/
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# define OFFSET_T1 16
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# define OFFSET_SAVED_CALL_X0 OFFSET_T1 + 8
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# define OFFSET_FS OFFSET_SAVED_CALL_X0 + 16
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# define OFFSET_RV OFFSET_FS + 8
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# define OFFSET_RG OFFSET_RV + DL_SIZEOF_RV
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# define SF_SIZE OFFSET_RG + DL_SIZEOF_RG
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# define OFFSET_PLTGOTN SF_SIZE
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# define OFFSET_LR OFFSET_PLTGOTN + 8
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/* Save arguments. */
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sub sp, sp, #SF_SIZE
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cfi_adjust_cfa_offset (SF_SIZE)
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stp x29, x30, [SP, #0]
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mov x29, sp
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cfi_def_cfa_register (x29)
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cfi_rel_offset (x29, 0)
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cfi_rel_offset (lr, 8)
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stp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*0]
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cfi_rel_offset (x0, OFFSET_RG + DL_OFFSET_RG_X0 + 16*0 + 0)
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cfi_rel_offset (x1, OFFSET_RG + DL_OFFSET_RG_X0 + 16*0 + 8)
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stp x2, x3, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*1]
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cfi_rel_offset (x2, OFFSET_RG + DL_OFFSET_RG_X0 + 16*1 + 0)
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cfi_rel_offset (x3, OFFSET_RG + DL_OFFSET_RG_X0 + 16*1 + 8)
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stp x4, x5, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*2]
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cfi_rel_offset (x4, OFFSET_RG + DL_OFFSET_RG_X0 + 16*2 + 0)
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cfi_rel_offset (x5, OFFSET_RG + DL_OFFSET_RG_X0 + 16*2 + 8)
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stp x6, x7, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*3]
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cfi_rel_offset (x6, OFFSET_RG + DL_OFFSET_RG_X0 + 16*3 + 0)
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cfi_rel_offset (x7, OFFSET_RG + DL_OFFSET_RG_X0 + 16*3 + 8)
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str x8, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*4 + 0]
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cfi_rel_offset (x8, OFFSET_RG + DL_OFFSET_RG_X0 + 16*4 + 0)
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/* Note 8 bytes of padding is in the stack frame for alignment */
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stp q0, q1, [X29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*0]
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cfi_rel_offset (q0, OFFSET_RG + DL_OFFSET_RG_V0 + 32*0)
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cfi_rel_offset (q1, OFFSET_RG + DL_OFFSET_RG_V0 + 32*0 + 16)
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stp q2, q3, [X29, #OFFSET_RG+ DL_OFFSET_RG_V0 + 32*1]
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cfi_rel_offset (q2, OFFSET_RG + DL_OFFSET_RG_V0 + 32*1 + 0)
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cfi_rel_offset (q3, OFFSET_RG + DL_OFFSET_RG_V0 + 32*1 + 16)
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stp q4, q5, [X29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*2]
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cfi_rel_offset (q4, OFFSET_RG + DL_OFFSET_RG_V0 + 32*2 + 0)
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cfi_rel_offset (q5, OFFSET_RG + DL_OFFSET_RG_V0 + 32*2 + 16)
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stp q6, q7, [X29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*3]
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cfi_rel_offset (q6, OFFSET_RG + DL_OFFSET_RG_V0 + 32*3 + 0)
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cfi_rel_offset (q7, OFFSET_RG + DL_OFFSET_RG_V0 + 32*3 + 16)
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/* No APCS extension supported. */
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str xzr, [X29, #OFFSET_RG + DL_OFFSET_RG_VPCS]
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add x0, x29, #SF_SIZE + 16
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ldr x1, [x29, #OFFSET_LR]
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stp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_SP]
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/* Get pointer to linker struct. */
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ldr PTR_REG (0), [ip0, #-PTR_SIZE]
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/* Prepare to call _dl_profile_fixup(). */
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ldr x1, [x29, OFFSET_PLTGOTN] /* Recover &PLTGOT[n] */
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sub x1, x1, ip0
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add x1, x1, x1, lsl #1
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lsl x1, x1, #3
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sub x1, x1, #(RELA_SIZE<<3)
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lsr x1, x1, #3
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stp x0, x1, [x29, #OFFSET_SAVED_CALL_X0]
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/* Set up extra args for _dl_profile_fixup */
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ldr x2, [x29, #OFFSET_LR] /* load saved LR */
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add x3, x29, #OFFSET_RG /* address of La_aarch64_reg */
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add x4, x29, #OFFSET_FS /* address of framesize */
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bl _dl_profile_fixup
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ldr ip0l, [x29, #OFFSET_FS] /* framesize == 0 */
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cmp ip0l, #0
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bge 1f
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cfi_remember_state
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/* Save the return. */
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mov ip0, x0
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/* Get arguments and return address back. */
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ldp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*0]
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ldp x2, x3, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*1]
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ldp x4, x5, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*2]
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ldp x6, x7, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*3]
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ldr x8, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*4]
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ldp q0, q1, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*0]
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ldp q2, q3, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*1]
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ldp q4, q5, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*2]
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ldp q6, q7, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*3]
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cfi_def_cfa_register (sp)
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ldp x29, x30, [x29, #0]
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cfi_restore(x29)
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cfi_restore(x30)
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# if HAVE_AARCH64_PAC_RET
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add sp, sp, SF_SIZE
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cfi_adjust_cfa_offset (-SF_SIZE)
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AUTIASP
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cfi_window_save
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add sp, sp, 16
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cfi_adjust_cfa_offset (-16)
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# else
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add sp, sp, SF_SIZE + 16
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cfi_adjust_cfa_offset (- SF_SIZE - 16)
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# endif
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/* Jump to the newly found address. */
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br ip0
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cfi_restore_state
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1:
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/* The new frame size is in ip0. */
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sub PTR_REG (1), PTR_REG (29), ip0l
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and sp, x1, #0xfffffffffffffff0
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str x0, [x29, #OFFSET_T1]
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mov x0, sp
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add x1, x29, #SF_SIZE + 16
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mov x2, ip0
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bl memcpy
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ldr ip0, [x29, #OFFSET_T1]
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/* Call the function. */
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ldp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*0]
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ldp x2, x3, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*1]
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ldp x4, x5, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*2]
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ldp x6, x7, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*3]
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ldr x8, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*4]
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ldp q0, q1, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*0]
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ldp q2, q3, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*1]
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ldp q4, q5, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*2]
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ldp q6, q7, [x29, #OFFSET_RG + DL_OFFSET_RG_V0 + 32*3]
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blr ip0
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stp x0, x1, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*0]
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stp x2, x3, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*1]
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stp x4, x5, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*2]
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stp x6, x7, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*3]
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stp q0, q1, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*0]
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stp q2, q3, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*1]
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stp q4, q5, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*2]
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stp q6, q7, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*3]
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str xzr, [X29, #OFFSET_RV + DL_OFFSET_RV_VPCS]
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/* Setup call to pltexit */
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ldp x0, x1, [x29, #OFFSET_SAVED_CALL_X0]
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add x2, x29, #OFFSET_RG
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add x3, x29, #OFFSET_RV
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bl _dl_audit_pltexit
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ldp x0, x1, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*0]
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ldp x2, x3, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*1]
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ldp x4, x5, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*2]
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ldp x6, x7, [x29, #OFFSET_RV + DL_OFFSET_RV_X0 + 16*3]
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ldp q0, q1, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*0]
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ldp q2, q3, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*1]
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ldp q4, q5, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*2]
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ldp q6, q7, [x29, #OFFSET_RV + DL_OFFSET_RV_V0 + 32*3]
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/* LR from within La_aarch64_reg */
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ldr lr, [x29, #OFFSET_RG + DL_OFFSET_RG_LR]
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cfi_restore(lr)
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# if HAVE_AARCH64_PAC_RET
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/* Note: LR restored from La_aarch64_reg has no PAC. */
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cfi_window_save
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# endif
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mov sp, x29
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cfi_def_cfa_register (sp)
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ldr x29, [x29, #0]
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cfi_restore(x29)
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add sp, sp, SF_SIZE + 16
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cfi_adjust_cfa_offset (- SF_SIZE - 16)
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br lr
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cfi_endproc
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.size _dl_runtime_profile, .-_dl_runtime_profile
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#endif
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.previous
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