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| author | Ulrich Drepper <drepper@redhat.com> | 2004-12-07 19:40:04 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2004-12-07 19:40:04 +0000 |
| commit | 2da9a6a1a7e08651875ac0026523ab6747caef2e (patch) | |
| tree | 4f3d343ea25156436249c3bec2a82749b9fed858 /sysdeps/unix/sysv/linux/sh | |
| parent | 00a121627cc88aca49d342f674c49d6c14ae1622 (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.S | 39 |
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) |