mirror of
https://github.com/9fans/plan9port.git
synced 2025-01-15 11:20:03 +00:00
54 lines
1,017 B
ArmAsm
54 lines
1,017 B
ArmAsm
.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
|
|
|