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authorRichard Henderson <rth@redhat.com>2004-12-17 10:11:44 +0000
committerRichard Henderson <rth@redhat.com>2004-12-17 10:11:44 +0000
commitcbc53df0fa0726c6267978250c1f53bf9517bf39 (patch)
treebba468278efe59e95c6ac05cd3ed286e07ecea3e /sysdeps/unix
parent9b7adbb732a1613dd454e966b3c18db0070f9f28 (diff)
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* sysdeps/unix/sysv/linux/alpha/clone.S (__clone): Add support for NPTL where the PID is stored at userlevel and needs to be reset when CLONE_THREAD is not used. nptl/ * sysdeps/unix/sysv/linux/alpha/clone.S: New file. * sysdeps/alpha/tcb-offsets.sym (TID_OFFSET): New.
2004-12-17 Richard Henderson <rth@redhat.com> * sysdeps/unix/sysv/linux/alpha/clone.S (__clone): Add support for NPTL where the PID is stored at userlevel and needs to be reset when CLONE_THREAD is not used.
Diffstat (limited to 'sysdeps/unix')
-rw-r--r--sysdeps/unix/sysv/linux/alpha/clone.S35
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 b4766ec..1c450d1 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)