diff options
| author | Andreas Kling <kling@serenityos.org> | 2021-02-25 15:26:08 +0100 |
|---|---|---|
| committer | Andreas Kling <kling@serenityos.org> | 2021-02-25 16:27:12 +0100 |
| commit | 8714f389f9d0819f888f990fb1941a258132328d (patch) | |
| tree | 9379b367b15fd4afa659d445bee0b17407c93d92 /Userland/Libraries/LibC/arch/i386 | |
| parent | 17f076d9129e959a0b670562f4e167029bd0a4fa (diff) | |
| download | serenity-8714f389f9d0819f888f990fb1941a258132328d.zip | |
LibC: Add x86_64 implementation of setjmp() and longjmp()
Diffstat (limited to 'Userland/Libraries/LibC/arch/i386')
| -rw-r--r-- | Userland/Libraries/LibC/arch/i386/setjmp.S | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/Userland/Libraries/LibC/arch/i386/setjmp.S b/Userland/Libraries/LibC/arch/i386/setjmp.S new file mode 100644 index 0000000000..6d2c4c4acf --- /dev/null +++ b/Userland/Libraries/LibC/arch/i386/setjmp.S @@ -0,0 +1,57 @@ +/* + * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +.global setjmp +setjmp: + mov 4(%esp), %eax + mov %ebx, 0(%eax) + mov %esi, 4(%eax) + mov %edi, 8(%eax) + mov %ebp, 12(%eax) + lea 4(%esp), %ecx + mov %ecx, 16(%eax) + mov (%esp), %ecx + mov %ecx, 20(%eax) + xor %eax, %eax + ret + +.global longjmp +longjmp: + mov 4(%esp), %edx + mov 8(%esp), %eax + mov 0(%edx), %ebx + mov 4(%edx), %esi + mov 8(%edx), %edi + mov 12(%edx), %ebp + mov 16(%edx), %ecx + mov %ecx, %esp + mov 20(%edx), %ecx + test %eax, %eax + jnz .nonzero + mov 1, %eax +.nonzero: + jmp *%ecx + |