diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/alpha/clone.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/alpha/clone.S | 35 |
1 files changed, 33 insertions, 2 deletions
diff --git a/sysdeps/unix/sysv/linux/alpha/clone.S b/sysdeps/unix/sysv/linux/alpha/clone.S index b4766ec457..1c450d1737 100644 --- a/sysdeps/unix/sysv/linux/alpha/clone.S +++ b/sysdeps/unix/sysv/linux/alpha/clone.S @@ -24,6 +24,9 @@ #define _ERRNO_H 1 #include <bits/errno.h> +#define CLONE_VM 0x00000100 +#define CLONE_THREAD 0x00010000 + /* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg, pid_t *ptid, void *tls, pid_t *ctid); @@ -51,9 +54,12 @@ ENTRY(__clone) beq a1,$error /* no NULL stack pointers */ /* Save the fn ptr and arg on the new stack. */ - subq a1,16,a1 + subq a1,32,a1 stq a0,0(a1) stq a3,8(a1) +#ifdef RESET_PID + stq a2,16(a1) +#endif /* The syscall is of the form clone(flags, usp, ptid, ctid, tls). Shift the flags, ptid, ctid, tls arguments into place; the @@ -93,10 +99,19 @@ thread_start: mov 0, fp .prologue 0 +#ifdef RESET_PID + /* Check and see if we need to reset the PID. */ + ldq t0,16(sp) + lda t1,CLONE_THREAD + and t0,t1,t2 + beq t2,2f +1: +#endif + /* Load up the arguments. */ ldq pv,0(sp) ldq a0,8(sp) - addq sp,16,sp + addq sp,32,sp /* Call the user's function. */ jsr ra,(pv) @@ -113,6 +128,22 @@ thread_start: /* Die horribly. */ halt +#ifdef RESET_PID +2: + rduniq + lda t1, CLONE_VM + mov v0, s0 + lda v0, -1 + and t0, t1, t2 + bne t2, 3f + lda v0, __NR_getxpid + callsys +3: + stl v0, PID_OFFSET(s0) + stl v0, TID_OFFSET(s0) + br 1b +#endif + .end thread_start weak_alias(__clone, clone) |