diff options
Diffstat (limited to 'libc/sysdeps/linux/arm/clone.S')
| -rw-r--r-- | libc/sysdeps/linux/arm/clone.S | 45 |
1 files changed, 20 insertions, 25 deletions
diff --git a/libc/sysdeps/linux/arm/clone.S b/libc/sysdeps/linux/arm/clone.S index f417be07f..7b5bf2ee3 100644 --- a/libc/sysdeps/linux/arm/clone.S +++ b/libc/sysdeps/linux/arm/clone.S @@ -20,21 +20,23 @@ /* clone() is even more special than fork() as it mucks with stacks and invokes a function in the right context after its all over. */ -#include <asm/errno.h> +#define _ERRNO_H +#include <bits/errno.h> #include <sys/syscall.h> +#ifdef __NR_clone /* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */ -.text -.globl __clone; -.type __clone,%function -.align 4; + .text + .globl __clone + .type __clone,%function + .align 4 __clone: @ sanity check args cmp r0, #0 cmpne r1, #0 moveq r0, #-EINVAL - beq __syscall_error (PLT) + beq __error @ insert the args onto the new stack sub r1, r1, #8 @@ -48,7 +50,7 @@ __clone: @ new sp is already in r1 swi __NR_clone movs a1, a1 - blt __syscall_error (PLT) + blt __error movne pc, lr @ pick the function arg and call address off the stack and execute @@ -57,25 +59,18 @@ __clone: ldr pc, [sp] @ and we are done, passing the return value through r0 - b _exit (PLT) +#ifdef __PIC__ + b _exit(PLT) +#else + b _exit +#endif -__syscall_error: - /* Looks like the syscall choked -- set errno */ - ldr r3, .L4 - /* Calculate the - of the syscall result, in case we need it */ - rsb r2, r0, $0 +__error: + b __syscall_error - /* errno = -result */ - str r2, [r9,r3] + .size __clone,.-__clone - /* return -1 */ - mvn r0, $0 - mov pc, lr -.size __clone,.-__clone; - -.L4: .word errno - - -.globl clone; - clone = __clone + .weak clone + clone = __clone +#endif |