diff options
Diffstat (limited to 'swtch.S')
| -rw-r--r-- | swtch.S | 36 |
1 files changed, 21 insertions, 15 deletions
@@ -8,22 +8,28 @@ .globl swtch swtch: - movl 4(%esp), %eax - movl 8(%esp), %edx - - # Save old callee-saved registers - pushl %ebp - pushl %ebx - pushl %esi - pushl %edi + # Save old callee-save registers + push %rbp + push %rbx + push %r11 + push %r12 + push %r13 + push %r14 + push %r15 # Switch stacks - movl %esp, (%eax) - movl %edx, %esp + mov %rsp, (%rdi) # first arg is in rdi + mov %rsi, %rsp # second arg is in rsi + + # Load new callee-save registers + pop %r15 + pop %r14 + pop %r13 + pop %r12 + pop %r11 + pop %rbx + pop %rbp - # Load new callee-saved registers - popl %edi - popl %esi - popl %ebx - popl %ebp ret + + |