From 1e12632591ab98a6ea3af8680716c28282552981 Mon Sep 17 00:00:00 2001 From: "Nicholas J. Kain" Date: Tue, 15 Feb 2011 07:32:09 -0500 Subject: Port musl to x86-64. One giant commit! --- src/setjmp/x86_64/longjmp.s | 24 ++++++++++++++++++++++++ src/setjmp/x86_64/setjmp.s | 25 +++++++++++++++++++++++++ 2 files changed, 49 insertions(+) create mode 100644 src/setjmp/x86_64/longjmp.s create mode 100644 src/setjmp/x86_64/setjmp.s (limited to 'src/setjmp') diff --git a/src/setjmp/x86_64/longjmp.s b/src/setjmp/x86_64/longjmp.s new file mode 100644 index 00000000..c63b0c95 --- /dev/null +++ b/src/setjmp/x86_64/longjmp.s @@ -0,0 +1,24 @@ +/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */ +.global _longjmp +.global longjmp +.type _longjmp,%function +.type longjmp,%function +_longjmp: +longjmp: + mov %rsi,%rax /* val will be longjmp return */ + test %rax,%rax + jnz .L0 + inc %rax /* if val==0, val=1 per longjmp semantics */ +.L0: + movq (%rdi),%rbx /* rdi is the jmp_buf, restore regs from it */ + movq 8(%rdi),%rbp + movq 16(%rdi),%r12 + movq 24(%rdi),%r13 + movq 32(%rdi),%r14 + movq 40(%rdi),%r15 + movq 48(%rdi),%rdx /* this ends up being the stack pointer */ + mov %rdx,%rsp + movq 56(%rdi),%rdx /* this is the instruction pointer */ + jmp *%rdx /* goto saved address without altering rsp */ +.size _longjmp,.-_longjmp +.size longjmp,.-longjmp diff --git a/src/setjmp/x86_64/setjmp.s b/src/setjmp/x86_64/setjmp.s new file mode 100644 index 00000000..8f29fa81 --- /dev/null +++ b/src/setjmp/x86_64/setjmp.s @@ -0,0 +1,25 @@ +/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */ +.global __setjmp +.global _setjmp +.global setjmp +.type __setjmp,%function +.type _setjmp,%function +.type setjmp,%function +__setjmp: +_setjmp: +setjmp: + mov %rbx,(%rdi) /* rdi is jmp_buf, move registers onto it */ + mov %rbp,8(%rdi) + mov %r12,16(%rdi) + mov %r13,24(%rdi) + mov %r14,32(%rdi) + mov %r15,40(%rdi) + leaq 8(%rsp),%rdx /* this is our rsp WITHOUT current ret addr */ + mov %rdx,48(%rdi) + movq (%rsp),%rdx /* save return addr ptr for new rip */ + mov %rdx,56(%rdi) + xor %rax,%rax /* always return 0 */ + ret +.size __setjmp,.-__setjmp +.size _setjmp,.-_setjmp +.size setjmp,.-setjmp -- cgit v1.2.1