| .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 | |