blob: e570349f93bbc93cd24aa2fa17c376006ef63ff4 [file] [log] [blame] [raw]
/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#include <sys/syscall.h>
#include <machine/asm.h>
/*
* rfork_thread(3) - rfork_thread(flags, stack, func, arg);
*/
#define KERNCALL int $0x80
ENTRY(rfork_thread)
push %ebp
mov %esp, %ebp
push %esi
mov 12(%ebp), %esi # the thread stack address
sub $4, %esi
mov 20(%ebp), %eax # the thread argument
mov %eax, (%esi)
sub $4, %esi
mov 16(%ebp), %eax # the thread start address
mov %eax, (%esi)
push 8(%ebp) # rfork(2) flags
push $0
mov $SYS_rfork, %eax
KERNCALL
jc error
cmp $0, %edx
jne child
parent:
add $8, %esp
pop %esi
leave
ret
child:
mov %esi, %esp
pop %eax
call *%eax # call a thread start address ...
add $4, %esp
push %eax
push $0
mov $SYS_exit, %eax # ... and exit(2) after a thread would return
KERNCALL
error:
add $8, %esp
pop %esi
leave
PIC_PROLOGUE
/* libc's cerror: jmp PIC_PLT(HIDENAME(cerror)) */
push %eax
call PIC_PLT(CNAME(__error))
pop %ecx
PIC_EPILOGUE
mov %ecx, (%eax)
mov $-1, %eax
mov $-1, %edx
ret