| .globl _tas |
| _tas: |
| movl $0xCAFEBABE, %eax |
| movl 4(%esp), %ecx |
| xchgl %eax, 0(%ecx) |
| ret |
| |
| .globl getmcontext |
| getmcontext: |
| movl 4(%esp), %eax |
| |
| movl %fs, 8(%eax) |
| movl %es, 12(%eax) |
| movl %ds, 16(%eax) |
| movl %ss, 76(%eax) |
| movl %edi, 20(%eax) |
| movl %esi, 24(%eax) |
| movl %ebp, 28(%eax) |
| movl %ebx, 36(%eax) |
| movl %edx, 40(%eax) |
| movl %ecx, 44(%eax) |
| |
| movl $1, 48(%eax) /* %eax */ |
| movl (%esp), %ecx /* %eip */ |
| movl %ecx, 60(%eax) |
| leal 4(%esp), %ecx /* %esp */ |
| movl %ecx, 72(%eax) |
| |
| movl 44(%eax), %ecx /* restore %ecx */ |
| movl $0, %eax |
| ret |
| |
| .globl setmcontext |
| setmcontext: |
| movl 4(%esp), %eax |
| |
| movl 8(%eax), %fs |
| movl 12(%eax), %es |
| movl 16(%eax), %ds |
| movl 76(%eax), %ss |
| movl 20(%eax), %edi |
| movl 24(%eax), %esi |
| movl 28(%eax), %ebp |
| movl 36(%eax), %ebx |
| movl 40(%eax), %edx |
| movl 44(%eax), %ecx |
| |
| movl 72(%eax), %esp |
| pushl 60(%eax) /* new %eip */ |
| movl 48(%eax), %eax |
| ret |
| |
