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2004-12-14  Ulrich Drepper  <drepper@redhat.com>

	* sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S: Add support
	for pid caching in nptl.
This commit is contained in:
Ulrich Drepper 2004-12-15 07:04:50 +00:00
parent 8a3f5844c5
commit 1f9d7c2739
5 changed files with 45 additions and 2 deletions
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5
ChangeLog
View File

@ -1,3 +1,8 @@
2004-12-14 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S: Add support
for pid caching in nptl.
2004-10-18 Maciej W. Rozycki <macro@mips.com>
* sysdeps/unix/sysv/linux/mips/bits/socket.h (__cmsg_nxthdr): Use

8
nptl/ChangeLog
View File

@ -1,3 +1,11 @@
2004-12-14 Ulrich Drepper <drepper@redhat.com>
* sysdeps/powerpc/tcb-offsets.sym: Add TID.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S: New file.
* tst-getpid1.c: If child crashes, report this first. Print which
signal.
2004-12-09 Ulrich Drepper <drepper@redhat.com>
* init.c (__pthread_initialize_minimal_internal): Also unblock

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

@ -12,3 +12,4 @@
MULTIPLE_THREADS_OFFSET thread_offsetof (header.multiple_threads)
#endif
PID thread_offsetof (pid)
TID thread_offsetof (tid)

3
nptl/sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S Normal file
View File

@ -0,0 +1,3 @@
#define RESET_PID
#include <tcb-offsets.h>
#include <sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S>

30
sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S
View File

@ -23,6 +23,9 @@
#include <bp-sym.h>
#include <bp-asm.h>
#define CLONE_VM 0x00000100
#define CLONE_THREAD 0x00010000
/* This is the only really unusual system call in PPC linux, but not
because of any weirdness in the system call itself; because of
all the freaky stuff we have to do to make the call useful. */
@ -45,10 +48,13 @@ ENTRY (BP_SYM (__clone))
beq- cr0,L(badargs)
/* Set up stack frame for parent. */
stdu r1,-80(r1)
stdu r1,-88(r1)
std r29,56(r1)
std r30,64(r1)
std r31,72(r1)
#ifdef RESET_PID
std r28,80(r1)
#endif
/* Set up stack frame for child. */
clrrdi r4,r4,4
@ -58,6 +64,9 @@ ENTRY (BP_SYM (__clone))
/* Save fn, args, stack across syscall. */
mr r29,r3 /* Function in r29. */
mr r30,r4 /* Stack pointer in r30. */
#ifdef RESET_PID
mr r28,r5 /* Flags in r28. */
#endif
mr r31,r6 /* Argument in r31. */
/* 'flags' argument is first parameter to clone syscall. (The other
@ -81,6 +90,20 @@ ENTRY (BP_SYM (__clone))
it adds a race condition if a signal is sent to a thread
just after it is created (in the previous three instructions). */
mr r1,r30
#ifdef RESET_PID
andis. r0,r28,1 /* This is & CLONE_THREAD */
bne+ r0,L(oldpid)
andi. r0,r28,CLONE_VM
li r3,-1
bne- r0,L(nomoregetpid)
DO_CALL(SYS_ify(getpid))
L(nomoregetpid):
stw r3,TID(r13)
stw r3,PID(r13)
L(oldpid):
#endif
/* Call procedure. */
ld r0,0(r29)
ld r2,8(r29)
@ -96,10 +119,13 @@ ENTRY (BP_SYM (__clone))
L(parent):
/* Parent. Restore registers & return. */
#ifdef RESET_PID
ld r28,88(r1)
#endif
ld r31,72(r1)
ld r30,64(r1)
ld r29,56(r1)
addi r1,r1,80
addi r1,r1,88
bnslr+
b JUMPTARGET(__syscall_error)