diff options
Diffstat (limited to 'arch/x86/platform/efi/efi_stub_64.S')
| -rw-r--r-- | arch/x86/platform/efi/efi_stub_64.S | 117 |
1 files changed, 16 insertions, 101 deletions
diff --git a/arch/x86/platform/efi/efi_stub_64.S b/arch/x86/platform/efi/efi_stub_64.S index 4c07ccab8146..f0a5fba0717e 100644 --- a/arch/x86/platform/efi/efi_stub_64.S +++ b/arch/x86/platform/efi/efi_stub_64.S @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0 */ /* * Function calling ABI conversion from Linux to EFI for x86_64 * @@ -7,110 +8,24 @@ */ #include <linux/linkage.h> - -#define SAVE_XMM \ - mov %rsp, %rax; \ - subq $0x70, %rsp; \ - and $~0xf, %rsp; \ - mov %rax, (%rsp); \ - mov %cr0, %rax; \ - clts; \ - mov %rax, 0x8(%rsp); \ - movaps %xmm0, 0x60(%rsp); \ - movaps %xmm1, 0x50(%rsp); \ - movaps %xmm2, 0x40(%rsp); \ - movaps %xmm3, 0x30(%rsp); \ - movaps %xmm4, 0x20(%rsp); \ - movaps %xmm5, 0x10(%rsp) - -#define RESTORE_XMM \ - movaps 0x60(%rsp), %xmm0; \ - movaps 0x50(%rsp), %xmm1; \ - movaps 0x40(%rsp), %xmm2; \ - movaps 0x30(%rsp), %xmm3; \ - movaps 0x20(%rsp), %xmm4; \ - movaps 0x10(%rsp), %xmm5; \ - mov 0x8(%rsp), %rsi; \ - mov %rsi, %cr0; \ - mov (%rsp), %rsp - -ENTRY(efi_call0) - SAVE_XMM - subq $32, %rsp - call *%rdi - addq $32, %rsp - RESTORE_XMM - ret -ENDPROC(efi_call0) - -ENTRY(efi_call1) - SAVE_XMM - subq $32, %rsp - mov %rsi, %rcx - call *%rdi - addq $32, %rsp - RESTORE_XMM - ret -ENDPROC(efi_call1) - -ENTRY(efi_call2) - SAVE_XMM - subq $32, %rsp - mov %rsi, %rcx - call *%rdi - addq $32, %rsp - RESTORE_XMM - ret -ENDPROC(efi_call2) - -ENTRY(efi_call3) - SAVE_XMM - subq $32, %rsp - mov %rcx, %r8 - mov %rsi, %rcx - call *%rdi - addq $32, %rsp - RESTORE_XMM - ret -ENDPROC(efi_call3) - -ENTRY(efi_call4) - SAVE_XMM - subq $32, %rsp - mov %r8, %r9 - mov %rcx, %r8 - mov %rsi, %rcx - call *%rdi - addq $32, %rsp - RESTORE_XMM - ret -ENDPROC(efi_call4) - -ENTRY(efi_call5) - SAVE_XMM - subq $48, %rsp - mov %r9, 32(%rsp) - mov %r8, %r9 - mov %rcx, %r8 - mov %rsi, %rcx - call *%rdi - addq $48, %rsp - RESTORE_XMM - ret -ENDPROC(efi_call5) - -ENTRY(efi_call6) - SAVE_XMM - mov (%rsp), %rax - mov 8(%rax), %rax +#include <asm/nospec-branch.h> + +SYM_FUNC_START(__efi_call) + /* + * The EFI code doesn't have any CFI, annotate away the CFI violation. + */ + ANNOTATE_NOCFI_SYM + pushq %rbp + movq %rsp, %rbp + and $~0xf, %rsp + mov 16(%rbp), %rax subq $48, %rsp mov %r9, 32(%rsp) mov %rax, 40(%rsp) mov %r8, %r9 mov %rcx, %r8 mov %rsi, %rcx - call *%rdi - addq $48, %rsp - RESTORE_XMM - ret -ENDPROC(efi_call6) + CALL_NOSPEC rdi + leave + RET +SYM_FUNC_END(__efi_call) |