From 6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 18:29:51 +0200 Subject: Adding upstream version 2.06. Signed-off-by: Daniel Baumann --- grub-core/lib/x86_64/setjmp.S | 68 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 grub-core/lib/x86_64/setjmp.S (limited to 'grub-core/lib/x86_64/setjmp.S') diff --git a/grub-core/lib/x86_64/setjmp.S b/grub-core/lib/x86_64/setjmp.S new file mode 100644 index 0000000..6b151bc --- /dev/null +++ b/grub-core/lib/x86_64/setjmp.S @@ -0,0 +1,68 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2003,2007 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see . + */ + +#include +#include + + .file "setjmp.S" + +GRUB_MOD_LICENSE "GPLv3+" + + .text + +/* + * jmp_buf: + * rbx rsp rbp r12 r13 r14 r15 rip + * 0 8 16 24 32 40 48 56 + */ + +/* + * int grub_setjmp (grub_jmp_buf env) + */ +FUNCTION(grub_setjmp) + pop %rsi /* Return address, and adjust the stack */ + xorq %rax, %rax + movq %rbx, 0(%rdi) /* RBX */ + movq %rsp, 8(%rdi) /* RSP */ + push %rsi + movq %rbp, 16(%rdi) /* RBP */ + movq %r12, 24(%rdi) /* R12 */ + movq %r13, 32(%rdi) /* R13 */ + movq %r14, 40(%rdi) /* R14 */ + movq %r15, 48(%rdi) /* R15 */ + movq %rsi, 56(%rdi) /* RSI */ + ret + +/* + * int grub_longjmp (grub_jmp_buf env, int val) + */ +FUNCTION(grub_longjmp) + movl %esi, %eax + orl %eax, %eax + jnz 1f + incl %eax +1: + + movq (%rdi), %rbx + movq 8(%rdi), %rsp + movq 16(%rdi), %rbp + movq 24(%rdi), %r12 + movq 32(%rdi), %r13 + movq 40(%rdi), %r14 + movq 48(%rdi), %r15 + jmp *56(%rdi) -- cgit v1.2.3