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/* PLT trampolines. x86-64 version.
Copyright (C) 2004-2015 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 <config.h>
#include <sysdep.h>
#include <link-defines.h>
#if (RTLD_SAVESPACE_SSE % 32) != 0
# error RTLD_SAVESPACE_SSE must be aligned to 32 bytes
#endif
/* Area on stack to save and restore registers used for parameter
passing when calling _dl_fixup. */
#ifdef __ILP32__
/* X32 saves RCX, RDX, RSI, RDI, R8 and R9 plus RAX. */
# define REGISTER_SAVE_AREA (8 * 7)
# define REGISTER_SAVE_RAX 0
# define PRESERVE_BND_REGS_PREFIX
#else
/* X86-64 saves RCX, RDX, RSI, RDI, R8 and R9 plus RAX as well as BND0,
BND1, BND2, BND3. */
# define REGISTER_SAVE_AREA (8 * 7 + 16 * 4)
/* Align bound register save area to 16 bytes. */
# define REGISTER_SAVE_BND0 0
# define REGISTER_SAVE_BND1 (REGISTER_SAVE_BND0 + 16)
# define REGISTER_SAVE_BND2 (REGISTER_SAVE_BND1 + 16)
# define REGISTER_SAVE_BND3 (REGISTER_SAVE_BND2 + 16)
# define REGISTER_SAVE_RAX (REGISTER_SAVE_BND3 + 16)
# ifdef HAVE_MPX_SUPPORT
# define PRESERVE_BND_REGS_PREFIX bnd
# else
# define PRESERVE_BND_REGS_PREFIX .byte 0xf2
# endif
#endif
#define REGISTER_SAVE_RCX (REGISTER_SAVE_RAX + 8)
#define REGISTER_SAVE_RDX (REGISTER_SAVE_RCX + 8)
#define REGISTER_SAVE_RSI (REGISTER_SAVE_RDX + 8)
#define REGISTER_SAVE_RDI (REGISTER_SAVE_RSI + 8)
#define REGISTER_SAVE_R8 (REGISTER_SAVE_RDI + 8)
#define REGISTER_SAVE_R9 (REGISTER_SAVE_R8 + 8)
.text
.globl _dl_runtime_resolve
.type _dl_runtime_resolve, @function
.align 16
cfi_startproc
_dl_runtime_resolve:
cfi_adjust_cfa_offset(16) # Incorporate PLT
subq $REGISTER_SAVE_AREA,%rsp
cfi_adjust_cfa_offset(REGISTER_SAVE_AREA)
# 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)
#ifndef __ILP32__
# We also have to preserve bound registers. These are nops if
# Intel MPX isn't available or disabled.
# ifdef HAVE_MPX_SUPPORT
bndmov %bnd0, REGISTER_SAVE_BND0(%rsp)
bndmov %bnd1, REGISTER_SAVE_BND1(%rsp)
bndmov %bnd2, REGISTER_SAVE_BND2(%rsp)
bndmov %bnd3, REGISTER_SAVE_BND3(%rsp)
# else
.byte 0x66,0x0f,0x1b,0x44,0x24,REGISTER_SAVE_BND0
.byte 0x66,0x0f,0x1b,0x4c,0x24,REGISTER_SAVE_BND1
.byte 0x66,0x0f,0x1b,0x54,0x24,REGISTER_SAVE_BND2
.byte 0x66,0x0f,0x1b,0x5c,0x24,REGISTER_SAVE_BND3
# endif
#endif
# Copy args pushed by PLT in register.
# %rdi: link_map, %rsi: reloc_index
movq (REGISTER_SAVE_AREA + 8)(%rsp), %rsi
movq REGISTER_SAVE_AREA(%rsp), %rdi
call _dl_fixup # Call resolver.
movq %rax, %r11 # Save return value
#ifndef __ILP32__
# Restore bound registers. These are nops if Intel MPX isn't
# avaiable or disabled.
# ifdef HAVE_MPX_SUPPORT
bndmov REGISTER_SAVE_BND3(%rsp), %bnd3
bndmov REGISTER_SAVE_BND2(%rsp), %bnd2
bndmov REGISTER_SAVE_BND1(%rsp), %bnd1
bndmov REGISTER_SAVE_BND0(%rsp), %bnd0
# else
.byte 0x66,0x0f,0x1a,0x5c,0x24,REGISTER_SAVE_BND3
.byte 0x66,0x0f,0x1a,0x54,0x24,REGISTER_SAVE_BND2
.byte 0x66,0x0f,0x1a,0x4c,0x24,REGISTER_SAVE_BND1
.byte 0x66,0x0f,0x1a,0x44,0x24,REGISTER_SAVE_BND0
# endif
#endif
# Get register content back.
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
# Adjust stack(PLT did 2 pushes)
addq $(REGISTER_SAVE_AREA + 16), %rsp
cfi_adjust_cfa_offset(-(REGISTER_SAVE_AREA + 16))
# Preserve bound registers.
PRESERVE_BND_REGS_PREFIX
jmp *%r11 # Jump to function address.
cfi_endproc
.size _dl_runtime_resolve, .-_dl_runtime_resolve
#ifndef PROF
.globl _dl_runtime_profile
.type _dl_runtime_profile, @function
.align 16
cfi_startproc
_dl_runtime_profile:
cfi_adjust_cfa_offset(16) # Incorporate PLT
/* The La_x86_64_regs data structure pointed to by the
fourth paramater must be 16-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. */
subq $32, %rsp # 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)
movq %rsp, %rbx
cfi_def_cfa_register(%rbx)
/* Actively align the La_x86_64_regs structure. */
andq $0xfffffffffffffff0, %rsp
# if defined HAVE_AVX_SUPPORT || defined HAVE_AVX512_ASM_SUPPORT
/* sizeof(La_x86_64_regs). Need extra space for 8 SSE registers
to detect if any xmm0-xmm7 registers are changed by audit
module. */
subq $(LR_SIZE + XMM_SIZE*8), %rsp
# else
subq $LR_SIZE, %rsp # sizeof(La_x86_64_regs)
# endif
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)
leaq 48(%rbx), %rax
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,0x84,0x24;.long (LR_BND_OFFSET + BND_SIZE*2)
.byte 0x66,0x0f,0x1b,0x8c,0x24;.long (LR_BND_OFFSET + BND_SIZE*3)
# endif
# endif
# if defined HAVE_AVX_SUPPORT || defined HAVE_AVX512_ASM_SUPPORT
.data
L(have_avx):
.zero 4
.size L(have_avx), 4
.previous
cmpl $0, L(have_avx)(%rip)
jne L(defined)
movq %rbx, %r11 # Save rbx
movl $1, %eax
cpuid
movq %r11,%rbx # Restore rbx
xorl %eax, %eax
// AVX and XSAVE supported?
andl $((1 << 28) | (1 << 27)), %ecx
cmpl $((1 << 28) | (1 << 27)), %ecx
jne 10f
# ifdef HAVE_AVX512_ASM_SUPPORT
// AVX512 supported in processor?
movq %rbx, %r11 # Save rbx
xorl %ecx, %ecx
mov $0x7, %eax
cpuid
andl $(1 << 16), %ebx
# endif
xorl %ecx, %ecx
// Get XFEATURE_ENABLED_MASK
xgetbv
# ifdef HAVE_AVX512_ASM_SUPPORT
test %ebx, %ebx
movq %r11, %rbx # Restore rbx
je 20f
// Verify that XCR0[7:5] = '111b' and
// XCR0[2:1] = '11b' which means
// that zmm state is enabled
andl $0xe6, %eax
cmpl $0xe6, %eax
jne 20f
movl %eax, L(have_avx)(%rip)
L(avx512):
# define RESTORE_AVX
# define VMOV vmovdqu64
# define VEC(i) zmm##i
# define MORE_CODE
# include "dl-trampoline.h"
# undef VMOV
# undef VEC
# undef RESTORE_AVX
# endif
20: andl $0x6, %eax
10: subl $0x5, %eax
movl %eax, L(have_avx)(%rip)
cmpl $0, %eax
L(defined):
js L(no_avx)
# ifdef HAVE_AVX512_ASM_SUPPORT
cmpl $0xe6, L(have_avx)(%rip)
je L(avx512)
# endif
# define RESTORE_AVX
# define VMOV vmovdqu
# define VEC(i) ymm##i
# define MORE_CODE
# include "dl-trampoline.h"
.align 16
L(no_avx):
# endif
# undef RESTORE_AVX
# include "dl-trampoline.h"
cfi_endproc
.size _dl_runtime_profile, .-_dl_runtime_profile
#endif
#ifdef SHARED
.globl _dl_x86_64_save_sse
.type _dl_x86_64_save_sse, @function
.align 16
cfi_startproc
_dl_x86_64_save_sse:
# if defined HAVE_AVX_SUPPORT || defined HAVE_AVX512_ASM_SUPPORT
cmpl $0, L(have_avx)(%rip)
jne L(defined_5)
movq %rbx, %r11 # Save rbx
movl $1, %eax
cpuid
movq %r11,%rbx # Restore rbx
xorl %eax, %eax
// AVX and XSAVE supported?
andl $((1 << 28) | (1 << 27)), %ecx
cmpl $((1 << 28) | (1 << 27)), %ecx
jne 1f
# ifdef HAVE_AVX512_ASM_SUPPORT
// AVX512 supported in a processor?
movq %rbx, %r11 # Save rbx
xorl %ecx,%ecx
mov $0x7,%eax
cpuid
andl $(1 << 16), %ebx
# endif
xorl %ecx, %ecx
// Get XFEATURE_ENABLED_MASK
xgetbv
# ifdef HAVE_AVX512_ASM_SUPPORT
test %ebx, %ebx
movq %r11, %rbx # Restore rbx
je 2f
// Verify that XCR0[7:5] = '111b' and
// XCR0[2:1] = '11b' which means
// that zmm state is enabled
andl $0xe6, %eax
movl %eax, L(have_avx)(%rip)
cmpl $0xe6, %eax
je L(avx512_5)
# endif
2: andl $0x6, %eax
1: subl $0x5, %eax
movl %eax, L(have_avx)(%rip)
cmpl $0, %eax
L(defined_5):
js L(no_avx5)
# ifdef HAVE_AVX512_ASM_SUPPORT
cmpl $0xe6, L(have_avx)(%rip)
je L(avx512_5)
# endif
vmovdqa %ymm0, %fs:RTLD_SAVESPACE_SSE+0*YMM_SIZE
vmovdqa %ymm1, %fs:RTLD_SAVESPACE_SSE+1*YMM_SIZE
vmovdqa %ymm2, %fs:RTLD_SAVESPACE_SSE+2*YMM_SIZE
vmovdqa %ymm3, %fs:RTLD_SAVESPACE_SSE+3*YMM_SIZE
vmovdqa %ymm4, %fs:RTLD_SAVESPACE_SSE+4*YMM_SIZE
vmovdqa %ymm5, %fs:RTLD_SAVESPACE_SSE+5*YMM_SIZE
vmovdqa %ymm6, %fs:RTLD_SAVESPACE_SSE+6*YMM_SIZE
vmovdqa %ymm7, %fs:RTLD_SAVESPACE_SSE+7*YMM_SIZE
ret
# ifdef HAVE_AVX512_ASM_SUPPORT
L(avx512_5):
vmovdqu64 %zmm0, %fs:RTLD_SAVESPACE_SSE+0*ZMM_SIZE
vmovdqu64 %zmm1, %fs:RTLD_SAVESPACE_SSE+1*ZMM_SIZE
vmovdqu64 %zmm2, %fs:RTLD_SAVESPACE_SSE+2*ZMM_SIZE
vmovdqu64 %zmm3, %fs:RTLD_SAVESPACE_SSE+3*ZMM_SIZE
vmovdqu64 %zmm4, %fs:RTLD_SAVESPACE_SSE+4*ZMM_SIZE
vmovdqu64 %zmm5, %fs:RTLD_SAVESPACE_SSE+5*ZMM_SIZE
vmovdqu64 %zmm6, %fs:RTLD_SAVESPACE_SSE+6*ZMM_SIZE
vmovdqu64 %zmm7, %fs:RTLD_SAVESPACE_SSE+7*ZMM_SIZE
ret
# endif
L(no_avx5):
# endif
movdqa %xmm0, %fs:RTLD_SAVESPACE_SSE+0*XMM_SIZE
movdqa %xmm1, %fs:RTLD_SAVESPACE_SSE+1*XMM_SIZE
movdqa %xmm2, %fs:RTLD_SAVESPACE_SSE+2*XMM_SIZE
movdqa %xmm3, %fs:RTLD_SAVESPACE_SSE+3*XMM_SIZE
movdqa %xmm4, %fs:RTLD_SAVESPACE_SSE+4*XMM_SIZE
movdqa %xmm5, %fs:RTLD_SAVESPACE_SSE+5*XMM_SIZE
movdqa %xmm6, %fs:RTLD_SAVESPACE_SSE+6*XMM_SIZE
movdqa %xmm7, %fs:RTLD_SAVESPACE_SSE+7*XMM_SIZE
ret
cfi_endproc
.size _dl_x86_64_save_sse, .-_dl_x86_64_save_sse
.globl _dl_x86_64_restore_sse
.type _dl_x86_64_restore_sse, @function
.align 16
cfi_startproc
_dl_x86_64_restore_sse:
# if defined HAVE_AVX_SUPPORT || defined HAVE_AVX512_ASM_SUPPORT
cmpl $0, L(have_avx)(%rip)
js L(no_avx6)
# ifdef HAVE_AVX512_ASM_SUPPORT
cmpl $0xe6, L(have_avx)(%rip)
je L(avx512_6)
# endif
vmovdqa %fs:RTLD_SAVESPACE_SSE+0*YMM_SIZE, %ymm0
vmovdqa %fs:RTLD_SAVESPACE_SSE+1*YMM_SIZE, %ymm1
vmovdqa %fs:RTLD_SAVESPACE_SSE+2*YMM_SIZE, %ymm2
vmovdqa %fs:RTLD_SAVESPACE_SSE+3*YMM_SIZE, %ymm3
vmovdqa %fs:RTLD_SAVESPACE_SSE+4*YMM_SIZE, %ymm4
vmovdqa %fs:RTLD_SAVESPACE_SSE+5*YMM_SIZE, %ymm5
vmovdqa %fs:RTLD_SAVESPACE_SSE+6*YMM_SIZE, %ymm6
vmovdqa %fs:RTLD_SAVESPACE_SSE+7*YMM_SIZE, %ymm7
ret
# ifdef HAVE_AVX512_ASM_SUPPORT
L(avx512_6):
vmovdqu64 %fs:RTLD_SAVESPACE_SSE+0*ZMM_SIZE, %zmm0
vmovdqu64 %fs:RTLD_SAVESPACE_SSE+1*ZMM_SIZE, %zmm1
vmovdqu64 %fs:RTLD_SAVESPACE_SSE+2*ZMM_SIZE, %zmm2
vmovdqu64 %fs:RTLD_SAVESPACE_SSE+3*ZMM_SIZE, %zmm3
vmovdqu64 %fs:RTLD_SAVESPACE_SSE+4*ZMM_SIZE, %zmm4
vmovdqu64 %fs:RTLD_SAVESPACE_SSE+5*ZMM_SIZE, %zmm5
vmovdqu64 %fs:RTLD_SAVESPACE_SSE+6*ZMM_SIZE, %zmm6
vmovdqu64 %fs:RTLD_SAVESPACE_SSE+7*ZMM_SIZE, %zmm7
ret
# endif
L(no_avx6):
# endif
movdqa %fs:RTLD_SAVESPACE_SSE+0*XMM_SIZE, %xmm0
movdqa %fs:RTLD_SAVESPACE_SSE+1*XMM_SIZE, %xmm1
movdqa %fs:RTLD_SAVESPACE_SSE+2*XMM_SIZE, %xmm2
movdqa %fs:RTLD_SAVESPACE_SSE+3*XMM_SIZE, %xmm3
movdqa %fs:RTLD_SAVESPACE_SSE+4*XMM_SIZE, %xmm4
movdqa %fs:RTLD_SAVESPACE_SSE+5*XMM_SIZE, %xmm5
movdqa %fs:RTLD_SAVESPACE_SSE+6*XMM_SIZE, %xmm6
movdqa %fs:RTLD_SAVESPACE_SSE+7*XMM_SIZE, %xmm7
ret
cfi_endproc
.size _dl_x86_64_restore_sse, .-_dl_x86_64_restore_sse
#endif
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