/* PLT trampolines. x86-64 version. Copyright (C) 2009-2018 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 . */ .text #ifdef _dl_runtime_resolve # undef REGISTER_SAVE_AREA # undef LOCAL_STORAGE_AREA # undef BASE # if (STATE_SAVE_ALIGNMENT % 16) != 0 # error STATE_SAVE_ALIGNMENT must be multples of 16 # endif # if (STATE_SAVE_OFFSET % STATE_SAVE_ALIGNMENT) != 0 # error STATE_SAVE_OFFSET must be multples of STATE_SAVE_ALIGNMENT # endif # if DL_RUNTIME_RESOLVE_REALIGN_STACK /* Local stack area before jumping to function address: RBX. */ # define LOCAL_STORAGE_AREA 8 # define BASE rbx # ifdef USE_FXSAVE /* Use fxsave to save XMM registers. */ # define REGISTER_SAVE_AREA (512 + STATE_SAVE_OFFSET) # if (REGISTER_SAVE_AREA % 16) != 0 # error REGISTER_SAVE_AREA must be multples of 16 # endif # endif # else # ifndef USE_FXSAVE # error USE_FXSAVE must be defined # endif /* Use fxsave to save XMM registers. */ # define REGISTER_SAVE_AREA (512 + STATE_SAVE_OFFSET + 8) /* Local stack area before jumping to function address: All saved registers. */ # define LOCAL_STORAGE_AREA REGISTER_SAVE_AREA # define BASE rsp # if (REGISTER_SAVE_AREA % 16) != 8 # error REGISTER_SAVE_AREA must be odd multples of 8 # endif # endif .globl _dl_runtime_resolve .hidden _dl_runtime_resolve .type _dl_runtime_resolve, @function .align 16 cfi_startproc _dl_runtime_resolve: cfi_adjust_cfa_offset(16) # Incorporate PLT # if DL_RUNTIME_RESOLVE_REALIGN_STACK # if LOCAL_STORAGE_AREA != 8 # error LOCAL_STORAGE_AREA must be 8 # endif pushq %rbx # push subtracts stack by 8. cfi_adjust_cfa_offset(8) cfi_rel_offset(%rbx, 0) mov %RSP_LP, %RBX_LP cfi_def_cfa_register(%rbx) and $-STATE_SAVE_ALIGNMENT, %RSP_LP # endif # ifdef REGISTER_SAVE_AREA sub $REGISTER_SAVE_AREA, %RSP_LP # if !DL_RUNTIME_RESOLVE_REALIGN_STACK cfi_adjust_cfa_offset(REGISTER_SAVE_AREA) # endif # else # Allocate stack space of the required size to save the state. # if IS_IN (rtld) sub _rtld_local_ro+RTLD_GLOBAL_RO_DL_X86_CPU_FEATURES_OFFSET+XSAVE_STATE_SIZE_OFFSET(%rip), %RSP_LP # else sub _dl_x86_cpu_features+XSAVE_STATE_SIZE_OFFSET(%rip), %RSP_LP # endif # endif # Preserve registers otherwise clobbered. movq %rax, REGISTER_SAVE_RAX(%rsp) movq %rcx, REGISTER_SAVE_RCX(%rsp) movq %rdx, REGISTER_SAVE_RDX(%rsp) movq %rsi, REGISTER_SAVE_RSI(%rsp) movq %rdi, REGISTER_SAVE_RDI(%rsp) movq %r8, REGISTER_SAVE_R8(%rsp) movq %r9, REGISTER_SAVE_R9(%rsp) # ifdef USE_FXSAVE fxsave STATE_SAVE_OFFSET(%rsp) # else movl $STATE_SAVE_MASK, %eax xorl %edx, %edx # Clear the XSAVE Header. # ifdef USE_XSAVE movq %rdx, (STATE_SAVE_OFFSET + 512)(%rsp) movq %rdx, (STATE_SAVE_OFFSET + 512 + 8)(%rsp) # endif movq %rdx, (STATE_SAVE_OFFSET + 512 + 8 * 2)(%rsp) movq %rdx, (STATE_SAVE_OFFSET + 512 + 8 * 3)(%rsp) movq %rdx, (STATE_SAVE_OFFSET + 512 + 8 * 4)(%rsp) movq %rdx, (STATE_SAVE_OFFSET + 512 + 8 * 5)(%rsp) movq %rdx, (STATE_SAVE_OFFSET + 512 + 8 * 6)(%rsp) movq %rdx, (STATE_SAVE_OFFSET + 512 + 8 * 7)(%rsp) # ifdef USE_XSAVE xsave STATE_SAVE_OFFSET(%rsp) # else xsavec STATE_SAVE_OFFSET(%rsp) # endif # endif # Copy args pushed by PLT in register. # %rdi: link_map, %rsi: reloc_index mov (LOCAL_STORAGE_AREA + 8)(%BASE), %RSI_LP mov LOCAL_STORAGE_AREA(%BASE), %RDI_LP call _dl_fixup # Call resolver. mov %RAX_LP, %R11_LP # Save return value # Get register content back. # ifdef USE_FXSAVE fxrstor STATE_SAVE_OFFSET(%rsp) # else movl $STATE_SAVE_MASK, %eax xorl %edx, %edx xrstor STATE_SAVE_OFFSET(%rsp) # endif movq REGISTER_SAVE_R9(%rsp), %r9 movq REGISTER_SAVE_R8(%rsp), %r8 movq REGISTER_SAVE_RDI(%rsp), %rdi movq REGISTER_SAVE_RSI(%rsp), %rsi movq REGISTER_SAVE_RDX(%rsp), %rdx movq REGISTER_SAVE_RCX(%rsp), %rcx movq REGISTER_SAVE_RAX(%rsp), %rax # if DL_RUNTIME_RESOLVE_REALIGN_STACK mov %RBX_LP, %RSP_LP cfi_def_cfa_register(%rsp) movq (%rsp), %rbx cfi_restore(%rbx) # endif # Adjust stack(PLT did 2 pushes) add $(LOCAL_STORAGE_AREA + 16), %RSP_LP cfi_adjust_cfa_offset(-(LOCAL_STORAGE_AREA + 16)) # Preserve bound registers. PRESERVE_BND_REGS_PREFIX jmp *%r11 # Jump to function address. cfi_endproc .size _dl_runtime_resolve, .-_dl_runtime_resolve #endif #if !defined PROF && defined _dl_runtime_profile # if (LR_VECTOR_OFFSET % VEC_SIZE) != 0 # error LR_VECTOR_OFFSET must be multples of VEC_SIZE # endif .globl _dl_runtime_profile .hidden _dl_runtime_profile .type _dl_runtime_profile, @function .align 16 _dl_runtime_profile: cfi_startproc cfi_adjust_cfa_offset(16) # Incorporate PLT /* The La_x86_64_regs data structure pointed to by the fourth paramater must be VEC_SIZE-byte aligned. This must be explicitly enforced. We have the set up a dynamically sized stack frame. %rbx points to the top half which has a fixed size and preserves the original stack pointer. */ sub $32, %RSP_LP # Allocate the local storage. cfi_adjust_cfa_offset(32) movq %rbx, (%rsp) cfi_rel_offset(%rbx, 0) /* On the stack: 56(%rbx) parameter #1 48(%rbx) return address 40(%rbx) reloc index 32(%rbx) link_map 24(%rbx) La_x86_64_regs pointer 16(%rbx) framesize 8(%rbx) rax (%rbx) rbx */ movq %rax, 8(%rsp) mov %RSP_LP, %RBX_LP cfi_def_cfa_register(%rbx) /* Actively align the La_x86_64_regs structure. */ and $-VEC_SIZE, %RSP_LP /* sizeof(La_x86_64_regs). Need extra space for 8 SSE registers to detect if any xmm0-xmm7 registers are changed by audit module. */ sub $(LR_SIZE + XMM_SIZE*8), %RSP_LP movq %rsp, 24(%rbx) /* Fill the La_x86_64_regs structure. */ movq %rdx, LR_RDX_OFFSET(%rsp) movq %r8, LR_R8_OFFSET(%rsp) movq %r9, LR_R9_OFFSET(%rsp) movq %rcx, LR_RCX_OFFSET(%rsp) movq %rsi, LR_RSI_OFFSET(%rsp) movq %rdi, LR_RDI_OFFSET(%rsp) movq %rbp, LR_RBP_OFFSET(%rsp) lea 48(%rbx), %RAX_LP movq %rax, LR_RSP_OFFSET(%rsp) /* We always store the XMM registers even if AVX is available. This is to provide backward binary compatibility for existing audit modules. */ movaps %xmm0, (LR_XMM_OFFSET)(%rsp) movaps %xmm1, (LR_XMM_OFFSET + XMM_SIZE)(%rsp) movaps %xmm2, (LR_XMM_OFFSET + XMM_SIZE*2)(%rsp) movaps %xmm3, (LR_XMM_OFFSET + XMM_SIZE*3)(%rsp) movaps %xmm4, (LR_XMM_OFFSET + XMM_SIZE*4)(%rsp) movaps %xmm5, (LR_XMM_OFFSET + XMM_SIZE*5)(%rsp) movaps %xmm6, (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp) movaps %xmm7, (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp) # ifndef __ILP32__ # ifdef HAVE_MPX_SUPPORT bndmov %bnd0, (LR_BND_OFFSET)(%rsp) # Preserve bound bndmov %bnd1, (LR_BND_OFFSET + BND_SIZE)(%rsp) # registers. Nops if bndmov %bnd2, (LR_BND_OFFSET + BND_SIZE*2)(%rsp) # MPX not available bndmov %bnd3, (LR_BND_OFFSET + BND_SIZE*3)(%rsp) # or disabled. # else .byte 0x66,0x0f,0x1b,0x84,0x24;.long (LR_BND_OFFSET) .byte 0x66,0x0f,0x1b,0x8c,0x24;.long (LR_BND_OFFSET + BND_SIZE) .byte 0x66,0x0f,0x1b,0x94,0x24;.long (LR_BND_OFFSET + BND_SIZE*2) .byte 0x66,0x0f,0x1b,0x9c,0x24;.long (LR_BND_OFFSET + BND_SIZE*3) # endif # endif # ifdef RESTORE_AVX /* This is to support AVX audit modules. */ VMOVA %VEC(0), (LR_VECTOR_OFFSET)(%rsp) VMOVA %VEC(1), (LR_VECTOR_OFFSET + VECTOR_SIZE)(%rsp) VMOVA %VEC(2), (LR_VECTOR_OFFSET + VECTOR_SIZE*2)(%rsp) VMOVA %VEC(3), (LR_VECTOR_OFFSET + VECTOR_SIZE*3)(%rsp) VMOVA %VEC(4), (LR_VECTOR_OFFSET + VECTOR_SIZE*4)(%rsp) VMOVA %VEC(5), (LR_VECTOR_OFFSET + VECTOR_SIZE*5)(%rsp) VMOVA %VEC(6), (LR_VECTOR_OFFSET + VECTOR_SIZE*6)(%rsp) VMOVA %VEC(7), (LR_VECTOR_OFFSET + VECTOR_SIZE*7)(%rsp) /* Save xmm0-xmm7 registers to detect if any of them are changed by audit module. */ vmovdqa %xmm0, (LR_SIZE)(%rsp) vmovdqa %xmm1, (LR_SIZE + XMM_SIZE)(%rsp) vmovdqa %xmm2, (LR_SIZE + XMM_SIZE*2)(%rsp) vmovdqa %xmm3, (LR_SIZE + XMM_SIZE*3)(%rsp) vmovdqa %xmm4, (LR_SIZE + XMM_SIZE*4)(%rsp) vmovdqa %xmm5, (LR_SIZE + XMM_SIZE*5)(%rsp) vmovdqa %xmm6, (LR_SIZE + XMM_SIZE*6)(%rsp) vmovdqa %xmm7, (LR_SIZE + XMM_SIZE*7)(%rsp) # endif mov %RSP_LP, %RCX_LP # La_x86_64_regs pointer to %rcx. mov 48(%rbx), %RDX_LP # Load return address if needed. mov 40(%rbx), %RSI_LP # Copy args pushed by PLT in register. mov 32(%rbx), %RDI_LP # %rdi: link_map, %rsi: reloc_index lea 16(%rbx), %R8_LP # Address of framesize call _dl_profile_fixup # Call resolver. mov %RAX_LP, %R11_LP # Save return value. movq 8(%rbx), %rax # Get back register content. movq LR_RDX_OFFSET(%rsp), %rdx movq LR_R8_OFFSET(%rsp), %r8 movq LR_R9_OFFSET(%rsp), %r9 movaps (LR_XMM_OFFSET)(%rsp), %xmm0 movaps (LR_XMM_OFFSET + XMM_SIZE)(%rsp), %xmm1 movaps (LR_XMM_OFFSET + XMM_SIZE*2)(%rsp), %xmm2 movaps (LR_XMM_OFFSET + XMM_SIZE*3)(%rsp), %xmm3 movaps (LR_XMM_OFFSET + XMM_SIZE*4)(%rsp), %xmm4 movaps (LR_XMM_OFFSET + XMM_SIZE*5)(%rsp), %xmm5 movaps (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp), %xmm6 movaps (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp), %xmm7 # ifdef RESTORE_AVX /* Check if any xmm0-xmm7 registers are changed by audit module. */ vpcmpeqq (LR_SIZE)(%rsp), %xmm0, %xmm8 vpmovmskb %xmm8, %esi cmpl $0xffff, %esi je 2f vmovdqa %xmm0, (LR_VECTOR_OFFSET)(%rsp) jmp 1f 2: VMOVA (LR_VECTOR_OFFSET)(%rsp), %VEC(0) vmovdqa %xmm0, (LR_XMM_OFFSET)(%rsp) 1: vpcmpeqq (LR_SIZE + XMM_SIZE)(%rsp), %xmm1, %xmm8 vpmovmskb %xmm8, %esi cmpl $0xffff, %esi je 2f vmovdqa %xmm1, (LR_VECTOR_OFFSET + VECTOR_SIZE)(%rsp) jmp 1f 2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE)(%rsp), %VEC(1) vmovdqa %xmm1, (LR_XMM_OFFSET + XMM_SIZE)(%rsp) 1: vpcmpeqq (LR_SIZE + XMM_SIZE*2)(%rsp), %xmm2, %xmm8 vpmovmskb %xmm8, %esi cmpl $0xffff, %esi je 2f vmovdqa %xmm2, (LR_VECTOR_OFFSET + VECTOR_SIZE*2)(%rsp) jmp 1f 2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*2)(%rsp), %VEC(2) vmovdqa %xmm2, (LR_XMM_OFFSET + XMM_SIZE*2)(%rsp) 1: vpcmpeqq (LR_SIZE + XMM_SIZE*3)(%rsp), %xmm3, %xmm8 vpmovmskb %xmm8, %esi cmpl $0xffff, %esi je 2f vmovdqa %xmm3, (LR_VECTOR_OFFSET + VECTOR_SIZE*3)(%rsp) jmp 1f 2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*3)(%rsp), %VEC(3) vmovdqa %xmm3, (LR_XMM_OFFSET + XMM_SIZE*3)(%rsp) 1: vpcmpeqq (LR_SIZE + XMM_SIZE*4)(%rsp), %xmm4, %xmm8 vpmovmskb %xmm8, %esi cmpl $0xffff, %esi je 2f vmovdqa %xmm4, (LR_VECTOR_OFFSET + VECTOR_SIZE*4)(%rsp) jmp 1f 2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*4)(%rsp), %VEC(4) vmovdqa %xmm4, (LR_XMM_OFFSET + XMM_SIZE*4)(%rsp) 1: vpcmpeqq (LR_SIZE + XMM_SIZE*5)(%rsp), %xmm5, %xmm8 vpmovmskb %xmm8, %esi cmpl $0xffff, %esi je 2f vmovdqa %xmm5, (LR_VECTOR_OFFSET + VECTOR_SIZE*5)(%rsp) jmp 1f 2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*5)(%rsp), %VEC(5) vmovdqa %xmm5, (LR_XMM_OFFSET + XMM_SIZE*5)(%rsp) 1: vpcmpeqq (LR_SIZE + XMM_SIZE*6)(%rsp), %xmm6, %xmm8 vpmovmskb %xmm8, %esi cmpl $0xffff, %esi je 2f vmovdqa %xmm6, (LR_VECTOR_OFFSET + VECTOR_SIZE*6)(%rsp) jmp 1f 2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*6)(%rsp), %VEC(6) vmovdqa %xmm6, (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp) 1: vpcmpeqq (LR_SIZE + XMM_SIZE*7)(%rsp), %xmm7, %xmm8 vpmovmskb %xmm8, %esi cmpl $0xffff, %esi je 2f vmovdqa %xmm7, (LR_VECTOR_OFFSET + VECTOR_SIZE*7)(%rsp) jmp 1f 2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*7)(%rsp), %VEC(7) vmovdqa %xmm7, (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp) 1: # endif # ifndef __ILP32__ # ifdef HAVE_MPX_SUPPORT bndmov (LR_BND_OFFSET)(%rsp), %bnd0 # Restore bound bndmov (LR_BND_OFFSET + BND_SIZE)(%rsp), %bnd1 # registers. bndmov (LR_BND_OFFSET + BND_SIZE*2)(%rsp), %bnd2 bndmov (LR_BND_OFFSET + BND_SIZE*3)(%rsp), %bnd3 # else .byte 0x66,0x0f,0x1a,0x84,0x24;.long (LR_BND_OFFSET) .byte 0x66,0x0f,0x1a,0x8c,0x24;.long (LR_BND_OFFSET + BND_SIZE) .byte 0x66,0x0f,0x1a,0x94,0x24;.long (LR_BND_OFFSET + BND_SIZE*2) .byte 0x66,0x0f,0x1a,0x9c,0x24;.long (LR_BND_OFFSET + BND_SIZE*3) # endif # endif mov 16(%rbx), %R10_LP # Anything in framesize? test %R10_LP, %R10_LP PRESERVE_BND_REGS_PREFIX jns 3f /* There's nothing in the frame size, so there will be no call to the _dl_call_pltexit. */ /* Get back registers content. */ movq LR_RCX_OFFSET(%rsp), %rcx movq LR_RSI_OFFSET(%rsp), %rsi movq LR_RDI_OFFSET(%rsp), %rdi mov %RBX_LP, %RSP_LP movq (%rsp), %rbx cfi_restore(%rbx) cfi_def_cfa_register(%rsp) add $48, %RSP_LP # Adjust the stack to the return value # (eats the reloc index and link_map) cfi_adjust_cfa_offset(-48) PRESERVE_BND_REGS_PREFIX jmp *%r11 # Jump to function address. 3: cfi_adjust_cfa_offset(48) cfi_rel_offset(%rbx, 0) cfi_def_cfa_register(%rbx) /* At this point we need to prepare new stack for the function which has to be called. We copy the original stack to a temporary buffer of the size specified by the 'framesize' returned from _dl_profile_fixup */ lea LR_RSP_OFFSET(%rbx), %RSI_LP # stack add $8, %R10_LP and $-16, %R10_LP mov %R10_LP, %RCX_LP sub %R10_LP, %RSP_LP mov %RSP_LP, %RDI_LP shr $3, %RCX_LP rep movsq movq 24(%rdi), %rcx # Get back register content. movq 32(%rdi), %rsi movq 40(%rdi), %rdi PRESERVE_BND_REGS_PREFIX call *%r11 mov 24(%rbx), %RSP_LP # Drop the copied stack content /* Now we have to prepare the La_x86_64_retval structure for the _dl_call_pltexit. The La_x86_64_regs is being pointed by rsp now, so we just need to allocate the sizeof(La_x86_64_retval) space on the stack, since the alignment has already been taken care of. */ # ifdef RESTORE_AVX /* sizeof(La_x86_64_retval). Need extra space for 2 SSE registers to detect if xmm0/xmm1 registers are changed by audit module. */ sub $(LRV_SIZE + XMM_SIZE*2), %RSP_LP # else sub $LRV_SIZE, %RSP_LP # sizeof(La_x86_64_retval) # endif mov %RSP_LP, %RCX_LP # La_x86_64_retval argument to %rcx. /* Fill in the La_x86_64_retval structure. */ movq %rax, LRV_RAX_OFFSET(%rcx) movq %rdx, LRV_RDX_OFFSET(%rcx) movaps %xmm0, LRV_XMM0_OFFSET(%rcx) movaps %xmm1, LRV_XMM1_OFFSET(%rcx) # ifdef RESTORE_AVX /* This is to support AVX audit modules. */ VMOVA %VEC(0), LRV_VECTOR0_OFFSET(%rcx) VMOVA %VEC(1), LRV_VECTOR1_OFFSET(%rcx) /* Save xmm0/xmm1 registers to detect if they are changed by audit module. */ vmovdqa %xmm0, (LRV_SIZE)(%rcx) vmovdqa %xmm1, (LRV_SIZE + XMM_SIZE)(%rcx) # endif # ifndef __ILP32__ # ifdef HAVE_MPX_SUPPORT bndmov %bnd0, LRV_BND0_OFFSET(%rcx) # Preserve returned bounds. bndmov %bnd1, LRV_BND1_OFFSET(%rcx) # else .byte 0x66,0x0f,0x1b,0x81;.long (LRV_BND0_OFFSET) .byte 0x66,0x0f,0x1b,0x89;.long (LRV_BND1_OFFSET) # endif # endif fstpt LRV_ST0_OFFSET(%rcx) fstpt LRV_ST1_OFFSET(%rcx) movq 24(%rbx), %rdx # La_x86_64_regs argument to %rdx. movq 40(%rbx), %rsi # Copy args pushed by PLT in register. movq 32(%rbx), %rdi # %rdi: link_map, %rsi: reloc_index call _dl_call_pltexit /* Restore return registers. */ movq LRV_RAX_OFFSET(%rsp), %rax movq LRV_RDX_OFFSET(%rsp), %rdx movaps LRV_XMM0_OFFSET(%rsp), %xmm0 movaps LRV_XMM1_OFFSET(%rsp), %xmm1 # ifdef RESTORE_AVX /* Check if xmm0/xmm1 registers are changed by audit module. */ vpcmpeqq (LRV_SIZE)(%rsp), %xmm0, %xmm2 vpmovmskb %xmm2, %esi cmpl $0xffff, %esi jne 1f VMOVA LRV_VECTOR0_OFFSET(%rsp), %VEC(0) 1: vpcmpeqq (LRV_SIZE + XMM_SIZE)(%rsp), %xmm1, %xmm2 vpmovmskb %xmm2, %esi cmpl $0xffff, %esi jne 1f VMOVA LRV_VECTOR1_OFFSET(%rsp), %VEC(1) 1: # endif # ifndef __ILP32__ # ifdef HAVE_MPX_SUPPORT bndmov LRV_BND0_OFFSET(%rsp), %bnd0 # Restore bound registers. bndmov LRV_BND1_OFFSET(%rsp), %bnd1 # else .byte 0x66,0x0f,0x1a,0x84,0x24;.long (LRV_BND0_OFFSET) .byte 0x66,0x0f,0x1a,0x8c,0x24;.long (LRV_BND1_OFFSET) # endif # endif fldt LRV_ST1_OFFSET(%rsp) fldt LRV_ST0_OFFSET(%rsp) mov %RBX_LP, %RSP_LP movq (%rsp), %rbx cfi_restore(%rbx) cfi_def_cfa_register(%rsp) add $48, %RSP_LP # Adjust the stack to the return value # (eats the reloc index and link_map) cfi_adjust_cfa_offset(-48) PRESERVE_BND_REGS_PREFIX retq cfi_endproc .size _dl_runtime_profile, .-_dl_runtime_profile #endif