diff options
Diffstat (limited to 'usr/klibc/arch/ia64/vfork.S')
| -rw-r--r-- | usr/klibc/arch/ia64/vfork.S | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/usr/klibc/arch/ia64/vfork.S b/usr/klibc/arch/ia64/vfork.S new file mode 100644 index 0000000..e513188 --- /dev/null +++ b/usr/klibc/arch/ia64/vfork.S @@ -0,0 +1,37 @@ +/* + * ia64 specific vfork syscall + * + * Written By: Martin Hicks <mort@wildopensource.com> + * + */ + +/* This syscall is a special case of the clone syscall */ +#include <asm/unistd.h> +#include <asm/signal.h> + +/* These are redefined here because linux/sched.h isn't safe for + * inclusion in asm. + */ +#define CLONE_VM 0x00000100 /* set if VM shared between processes */ +#define CLONE_VFORK 0x00004000 /* set if parent wants the child to wake it up on exit */ + +/* pid_t vfork(void) */ +/* Implemented as clone(CLONE_VFORK | CLONE_VM | SIGCHLD, 0) */ + + .align 32 + .proc vfork + .global vfork +vfork: + alloc r2=ar.pfs,0,0,2,0 + mov r15=__NR_clone + mov out0=CLONE_VM|CLONE_VFORK|SIGCHLD + mov out1=0 + break 0x100000 // Do the syscall + cmp.eq p7,p6 = -1,r10 + ;; +(p7) movl r14 = errno + ;; +(p7) st4 [r14]=r8 +(p7) mov r8=-1 + br.ret.sptk.many b0 + .endp vfork |