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| author | Nicholas J. Kain <njkain@gmail.com> | 2011-02-15 07:32:09 -0500 |
|---|---|---|
| committer | Nicholas J. Kain <njkain@gmail.com> | 2011-02-15 07:32:09 -0500 |
| commit | 1e12632591ab98a6ea3af8680716c28282552981 (patch) | |
| tree | 5b79bd9a0b950d6ab414fef8cbb5dfcd1a6d2e83 /src/thread/x86_64/__unmapself.s | |
| parent | c2afb747b0296f23cd1903e82ccbdee3fc2978fd (diff) | |
| download | musl-1e12632591ab98a6ea3af8680716c28282552981.tar.gz musl-1e12632591ab98a6ea3af8680716c28282552981.tar.bz2 musl-1e12632591ab98a6ea3af8680716c28282552981.tar.xz musl-1e12632591ab98a6ea3af8680716c28282552981.zip | |
Port musl to x86-64. One giant commit!
Diffstat (limited to 'src/thread/x86_64/__unmapself.s')
| -rw-r--r-- | src/thread/x86_64/__unmapself.s | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/thread/x86_64/__unmapself.s b/src/thread/x86_64/__unmapself.s new file mode 100644 index 00000000..59092eaa --- /dev/null +++ b/src/thread/x86_64/__unmapself.s @@ -0,0 +1,24 @@ +/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */ +.text +.global __unmapself +.type __unmapself,%function +__unmapself: + call 1f /* glibc ABI compat */ + .long -1 + .long -1 +1: push %rsi /* save arg2 for munmap */ + push %rdx /* save arg3 for munmap */ + mov %rdi,%rsi /* rt_sigprocmask() args: move arg1 to rsi */ + xor %rdi,%rdi + xor %rdx,%rdx + movq $8,%r10 + movl $14,%eax /* __NR_rt_sigprocmask */ + syscall /* call rt_sigprocmask(0,arg1,0,8) */ + pop %rsi /* munmap() args: reload from stack */ + pop %rdi + movl $11,%eax /* __NR_munmap */ + syscall /* munmap(arg2,arg3) */ + xor %rdi,%rdi /* exit() args: always return success */ + movl $60,%eax /* __NR_exit */ + syscall /* exit(0) */ +.size __unmapself,.-__unmapself |