2004-12-28 04:20:39 +00:00
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.globl _tas
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_tas:
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movl $0xCAFEBABE, %eax
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movl 4(%esp), %ecx
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xchgl %eax, 0(%ecx)
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ret
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2005-11-03 01:00:56 +00:00
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.globl getcontext
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getcontext:
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movl 4(%esp), %eax
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addl $16, %eax /* point to mcontext */
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movl %fs, 8(%eax)
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movl %es, 12(%eax)
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movl %ds, 16(%eax)
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movl %ss, 76(%eax)
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movl %edi, 20(%eax)
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movl %esi, 24(%eax)
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movl %ebp, 28(%eax)
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movl %ebx, 36(%eax)
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movl %edx, 40(%eax)
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movl %ecx, 44(%eax)
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2004-12-28 04:20:39 +00:00
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2005-11-03 01:00:56 +00:00
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movl $1, 48(%eax) /* %eax */
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movl (%esp), %ecx /* %eip */
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movl %ecx, 60(%eax)
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leal 4(%esp), %ecx /* %esp */
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movl %ecx, 72(%eax)
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movl 44(%eax), %ecx /* restore %ecx */
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movl $0, %eax
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2004-12-28 04:20:39 +00:00
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ret
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2005-11-03 01:00:56 +00:00
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.globl setcontext
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setcontext:
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movl 4(%esp), %eax
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addl $16, %eax /* point to mcontext */
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movl 8(%eax), %fs
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movl 12(%eax), %es
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movl 16(%eax), %ds
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movl 76(%eax), %ss
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movl 20(%eax), %edi
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movl 24(%eax), %esi
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movl 28(%eax), %ebp
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movl 36(%eax), %ebx
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movl 40(%eax), %edx
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movl 72(%eax), %esp
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movl 60(%eax), %ecx /* push new %eip */
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pushl %ecx
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movl 44(%eax), %ecx
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movl 48(%eax), %eax
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ret
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