| /* |
| * 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> |
| #include <klibc/archsys.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) */ |
| |
| .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 |
| ;; |
| __IA64_BREAK // Do the syscall |
| |
| addl r15=0,r1 |
| cmp.eq p7,p6 = -1,r10 |
| ;; |
| ld8 r14=[r15] |
| ;; |
| (p7) st4 [r14]=r8 |
| ;; |
| (p7) mov r8=-1 |
| br.ret.sptk.many b0 |
| .endp |
