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authorUlrich Drepper <drepper@redhat.com>2004-12-07 19:40:04 +0000
committerUlrich Drepper <drepper@redhat.com>2004-12-07 19:40:04 +0000
commit2da9a6a1a7e08651875ac0026523ab6747caef2e (patch)
tree4f3d343ea25156436249c3bec2a82749b9fed858 /sysdeps/unix/sysv/linux/sh
parent00a121627cc88aca49d342f674c49d6c14ae1622 (diff)
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Update.
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.
Diffstat (limited to 'sysdeps/unix/sysv/linux/sh')
-rw-r--r--sysdeps/unix/sysv/linux/sh/clone.S39
1 files changed, 36 insertions, 3 deletions
diff --git a/sysdeps/unix/sysv/linux/sh/clone.S b/sysdeps/unix/sysv/linux/sh/clone.S
index 713b0f9c3b..7941c6b3ad 100644
--- a/sysdeps/unix/sysv/linux/sh/clone.S
+++ b/sysdeps/unix/sysv/linux/sh/clone.S
@@ -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)