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1/* SPDX-License-Identifier: GPL-2.0 */2#include <linux/linkage.h>3 4#define AX 05#define BX 1 * 86#define CX 2 * 87#define DX 3 * 88#define SI 4 * 89#define DI 5 * 810#define BP 6 * 811#define SP 7 * 812#define IP 8 * 813#define FLAGS 9 * 814#define CS 10 * 815#define SS 11 * 816#define DS 12 * 817#define ES 13 * 818#define FS 14 * 819#define GS 15 * 820#define R8 16 * 821#define R9 17 * 822#define R10 18 * 823#define R11 19 * 824#define R12 20 * 825#define R13 21 * 826#define R14 22 * 827#define R15 23 * 828 29.text30#ifdef HAVE_ARCH_X86_64_SUPPORT31SYM_FUNC_START(perf_regs_load)32 movq %rax, AX(%rdi)33 movq %rbx, BX(%rdi)34 movq %rcx, CX(%rdi)35 movq %rdx, DX(%rdi)36 movq %rsi, SI(%rdi)37 movq %rdi, DI(%rdi)38 movq %rbp, BP(%rdi)39 40 leaq 8(%rsp), %rax /* exclude this call. */41 movq %rax, SP(%rdi)42 43 movq 0(%rsp), %rax44 movq %rax, IP(%rdi)45 46 movq $0, FLAGS(%rdi)47 movq $0, CS(%rdi)48 movq $0, SS(%rdi)49 movq $0, DS(%rdi)50 movq $0, ES(%rdi)51 movq $0, FS(%rdi)52 movq $0, GS(%rdi)53 54 movq %r8, R8(%rdi)55 movq %r9, R9(%rdi)56 movq %r10, R10(%rdi)57 movq %r11, R11(%rdi)58 movq %r12, R12(%rdi)59 movq %r13, R13(%rdi)60 movq %r14, R14(%rdi)61 movq %r15, R15(%rdi)62 ret63SYM_FUNC_END(perf_regs_load)64#else65SYM_FUNC_START(perf_regs_load)66 push %edi67 movl 8(%esp), %edi68 movl %eax, AX(%edi)69 movl %ebx, BX(%edi)70 movl %ecx, CX(%edi)71 movl %edx, DX(%edi)72 movl %esi, SI(%edi)73 pop %eax74 movl %eax, DI(%edi)75 movl %ebp, BP(%edi)76 77 leal 4(%esp), %eax /* exclude this call. */78 movl %eax, SP(%edi)79 80 movl 0(%esp), %eax81 movl %eax, IP(%edi)82 83 movl $0, FLAGS(%edi)84 movl $0, CS(%edi)85 movl $0, SS(%edi)86 movl $0, DS(%edi)87 movl $0, ES(%edi)88 movl $0, FS(%edi)89 movl $0, GS(%edi)90 ret91SYM_FUNC_END(perf_regs_load)92#endif93 94/*95 * We need to provide note.GNU-stack section, saying that we want96 * NOT executable stack. Otherwise the final linking will assume that97 * the ELF stack should not be restricted at all and set it RWX.98 */99.section .note.GNU-stack,"",@progbits100