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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.

Browse Source 
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.
This commit is contained in:
Richard Henderson 2004-12-17 10:11:44 +00:00
parent 9b7adbb732
commit cbc53df0fa
5 changed files with 47 additions and 2 deletions
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6
ChangeLog
View File

@ -1,3 +1,9 @@
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.
2004-12-17 Jakub Jelinek <jakub@redhat.com>
* sysdeps/sparc/sparc64/fpu/libm-test-ulps: Update.

5
nptl/ChangeLog
View File

@ -1,3 +1,8 @@
2004-12-17 Richard Henderson <rth@redhat.com>
* sysdeps/unix/sysv/linux/alpha/clone.S: New file.
* sysdeps/alpha/tcb-offsets.sym (TID_OFFSET): New.
2004-12-16 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/powerpc/powerpc64/bits/local_lim.h: New file.

1
nptl/sysdeps/alpha/tcb-offsets.sym
View File

@ -11,3 +11,4 @@
MULTIPLE_THREADS_OFFSET thread_offsetof (header.multiple_threads)
PID_OFFSET thread_offsetof (pid)
TID_OFFSET thread_offsetof (tid)

2
nptl/sysdeps/unix/sysv/linux/alpha/clone.S Normal file
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@ -0,0 +1,2 @@
#define RESET_PID
#include <sysdeps/unix/sysv/linux/alpha/clone.S>

35
sysdeps/unix/sysv/linux/alpha/clone.S
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@ -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)