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2004-12-07  Kaz Kojima  <kkojima@rr.iij4u.or.jp>

	* sysdeps/unix/sysv/linux/sh/clone.S: Clear the frame pointer when
	starting a new thread.  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:
Ulrich Drepper 2004-12-07 19:40:04 +00:00
parent 00a121627c
commit 2da9a6a1a7
4 changed files with 48 additions and 3 deletions
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6
ChangeLog
View File

@ -1,3 +1,9 @@
2004-12-07 Kaz Kojima <kkojima@rr.iij4u.or.jp>
* sysdeps/unix/sysv/linux/sh/clone.S: Clear the frame pointer when
starting a new thread. Add support for NPTL where the PID is stored
at userlevel and needs to be reset when CLONE_THREAD is not used.
2004-12-01 Jakub Jelinek <jakub@redhat.com>
* elf/rtld.c (process_envvars): Don't consider LD_SHOW_AUXV

4
nptl/ChangeLog
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@ -1,3 +1,7 @@
2004-12-07 Kaz Kojima <kkojima@rr.iij4u.or.jp>
* sysdeps/unix/sysv/linux/sh/clone.S: New file.
2004-12-04 Ulrich Drepper <drepper@redhat.com>
* Makefile (tests): Add tst-getpid1.

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

39
sysdeps/unix/sysv/linux/sh/clone.S
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@ -1,4 +1,4 @@
/* Copyright (C) 1999, 2000, 2003 Free Software Foundation, Inc.
/* Copyright (C) 1999, 2000, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -22,11 +22,13 @@
#include <sysdep.h>
#define _ERRNO_H 1
#include <bits/errno.h>
#ifdef RESET_PID
#include <tcb-offsets.h>
#endif
/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
pid_t *ptid, void *tls, pid_t *ctid); */
.text
.text
ENTRY(__clone)
/* sanity check arguments. */
tst r4, r4
@ -64,6 +66,31 @@ ENTRY(__clone)
rts
nop
2:
/* terminate the stack frame */
mov #0, r14
#ifdef RESET_PID
mov r4, r0
shlr16 r0
tst #1, r0 // CLONE_THREAD = (1 << 16)
bf/s 4f
mov r4, r0
/* new pid */
shlr8 r0
tst #1, r0 // CLONE_VM = (1 << 8)
bf/s 3f
mov #-1, r0
mov #+SYS_ify(getpid), r3
trapa #0x15
3:
stc gbr, r1
mov.w .Lpidoff, r2
add r1, r2
mov.l r0, @r2
mov.w .Ltidoff, r2
add r1, r2
mov.l r0, @r2
4:
#endif
/* thread starts */
mov.l @r15, r1
jsr @r1
@ -94,6 +121,12 @@ ENTRY(__clone)
.long _GLOBAL_OFFSET_TABLE_
.L3:
.long PLTJMP(C_SYMBOL_NAME(_exit))
#ifdef RESET_PID
.Lpidoff:
.word PID - TLS_PRE_TCB_SIZE
.Ltidoff:
.word TID - TLS_PRE_TCB_SIZE
#endif
PSEUDO_END (__clone)
weak_alias (__clone, clone)