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author | rsc <devnull@localhost> | 2005-07-19 11:48:01 +0000 |
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committer | rsc <devnull@localhost> | 2005-07-19 11:48:01 +0000 |
commit | bea4b9f7246169ee1bd2a64a4b2be2c02ffcec8b (patch) | |
tree | cdcd8c46e07e0c2cb0fda82c0c574162bf7e5253 /src/libthread/OpenBSD-386-asm.s | |
parent | 9d654ebc8c4824a46483e0d5cf37a3e0181fe552 (diff) | |
download | plan9port-bea4b9f7246169ee1bd2a64a4b2be2c02ffcec8b.tar.gz plan9port-bea4b9f7246169ee1bd2a64a4b2be2c02ffcec8b.tar.bz2 plan9port-bea4b9f7246169ee1bd2a64a4b2be2c02ffcec8b.zip |
openbsd
Diffstat (limited to 'src/libthread/OpenBSD-386-asm.s')
-rw-r--r-- | src/libthread/OpenBSD-386-asm.s | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/src/libthread/OpenBSD-386-asm.s b/src/libthread/OpenBSD-386-asm.s new file mode 100644 index 00000000..f9a80255 --- /dev/null +++ b/src/libthread/OpenBSD-386-asm.s @@ -0,0 +1,54 @@ +.globl _tas +_tas: + movl $0xCAFEBABE, %eax + movl 4(%esp), %ecx + xchgl %eax, 0(%ecx) + ret + +.globl setmcontext +setmcontext: + movl 4(%esp), %edx + movl 8(%edx), %fs + movl 12(%edx), %es + movl 16(%edx), %ds + movl 76(%edx), %ss + movl 20(%edx), %edi + movl 24(%edx), %esi + movl 28(%edx), %ebp + movl %esp, %ecx + movl 72(%edx), %esp + pushl 60(%edx) /* eip */ + pushl 44(%edx) /* ecx */ + pushl 48(%edx) /* eax */ + movl 36(%edx), %ebx + movl 40(%edx), %edx + movl 12(%ecx), %eax + popl %eax + popl %ecx + ret + +.globl getmcontext +getmcontext: + pushl %edx + movl 8(%esp), %edx + movl %fs, 8(%edx) + movl %es, 12(%edx) + movl %ds, 16(%edx) + movl %ss, 76(%edx) + movl %edi, 20(%edx) + movl %esi, 24(%edx) + movl %ebp, 28(%edx) + movl %ebx, 36(%edx) + movl $1, 48(%edx) + popl %eax + movl %eax, 40(%edx) + movl %ecx, 44(%edx) + movl (%esp), %eax /* eip */ + movl %eax, 60(%edx) + movl %esp, %eax + addl $4, %eax /* setmcontext will re-push the eip */ + movl %eax, 72(%edx) + movl 40(%edx), %edx + xorl %eax, %eax + ret + |