# but requires us to preserve %ebx, %ebp, %esi, %edi. See
# [SysV-ABI-386] pages 3-11 and 3-12 for details.
#
- # This stack frame must match the one set up by thread_create().
+ # This stack frame must match the one set up by thread_create()
+ # in size.
pushl %ebx
pushl %ebp
pushl %esi
# Save current stack pointer to old thread's stack, if any.
movl SWITCH_CUR(%esp), %eax
- test %eax, %eax
- jz 1f
movl %esp, (%eax,%edx,1)
-1:
# Restore stack pointer from new thread's stack.
movl SWITCH_NEXT(%esp), %ecx