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authorUlrich Drepper <drepper@redhat.com>2003-01-03 23:12:17 +0000
committerUlrich Drepper <drepper@redhat.com>2003-01-03 23:12:17 +0000
commit5d6b8f4820c663dd79db6a944097cd681568d1dc (patch)
treef9a9f9ad3c3e3018db38791889b757d2bdf422fc
parent1cb990bc19634ef22fc1e02377089d3e80a8e48f (diff)
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Cancellation support for syscalls on Linux/Alpha.
-rw-r--r--linuxthreads/sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h127
1 files changed, 127 insertions, 0 deletions
diff --git a/linuxthreads/sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h b/linuxthreads/sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h
new file mode 100644
index 0000000000..ea8fd143ff
--- /dev/null
+++ b/linuxthreads/sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h
@@ -0,0 +1,127 @@
+/* Copyright (C) 2003 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
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sysdep.h>
+#ifndef __ASSEMBLER__
+# include <linuxthreads/internals.h>
+#endif
+
+#if !defined NOT_IN_libc || defined IS_IN_libpthread
+
+# ifdef PROF
+# define PSEUDO_PROF \
+ .set noat; \
+ lda AT, _mcount; \
+ jsr AT, (AT), _mcount; \
+ .set at
+# else
+# define PSEUDO_PROF
+# endif
+
+# undef PSEUDO
+# define PSEUDO(name, syscall_name, args) \
+ .globl name; \
+ .align 4; \
+ .ent name, 0; \
+__LABEL(name) \
+ ldgp gp, 0(pv); \
+ .prologue 1; \
+ PSEUDO_PROF; \
+ SINGLE_THREAD_P(t0); \
+ beq t0, $pseudo_cancel; \
+ lda v0, SYS_ify(syscall_name); \
+ call_pal PAL_callsys; \
+ bne a3, $syscall_error; \
+__LABEL($pseudo_ret) \
+ .subsection 2; \
+__LABEL($pseudo_cancel) \
+ subq sp, 64, sp; \
+ stq ra, 0(sp); \
+ SAVE_ARGS_##args; \
+ CENABLE; \
+ LOAD_ARGS_##args; \
+ lda v0, SYS_ify(syscall_name); \
+ call_pal PAL_callsys; \
+ stq v0, 8(sp); \
+ stq a3, 16(sp); \
+ CDISABLE; \
+ ldq ra, 0(sp); \
+ ldq v0, 8(sp); \
+ ldq a3, 16(sp); \
+ addq sp, 64, sp; \
+ beq a3, $pseudo_ret; \
+__LABEL($syscall_error) \
+ SYSCALL_ERROR_HANDLER; \
+ END(name); \
+ .previous
+
+# undef PSEUDO_END
+# define PSEUDO_END(sym)
+
+# define SAVE_ARGS_0 /* Nothing. */
+# define SAVE_ARGS_1 SAVE_ARGS_0; stq a0, 8(sp)
+# define SAVE_ARGS_2 SAVE_ARGS_1; stq a1, 16(sp)
+# define SAVE_ARGS_3 SAVE_ARGS_2; stq a2, 24(sp)
+# define SAVE_ARGS_4 SAVE_ARGS_3; stq a3, 32(sp)
+# define SAVE_ARGS_5 SAVE_ARGS_4; stq a4, 40(sp)
+# define SAVE_ARGS_6 SAVE_ARGS_5; stq a5, 48(sp)
+
+# define LOAD_ARGS_0 /* Nothing. */
+# define LOAD_ARGS_1 LOAD_ARGS_0; ldq a0, 8(sp)
+# define LOAD_ARGS_2 LOAD_ARGS_1; ldq a1, 16(sp)
+# define LOAD_ARGS_3 LOAD_ARGS_2; ldq a2, 24(sp)
+# define LOAD_ARGS_4 LOAD_ARGS_3; ldq a3, 32(sp)
+# define LOAD_ARGS_5 LOAD_ARGS_4; ldq a4, 40(sp)
+# define LOAD_ARGS_6 LOAD_ARGS_5; ldq a5, 48(sp)
+
+# ifdef IS_IN_libpthread
+# define __local_enable_asynccancel __pthread_enable_asynccancel
+# define __local_disable_asynccancel __pthread_disable_asynccancel
+# define __local_multiple_threads __pthread_multiple_threads
+# else
+# define __local_enable_asynccancel __libc_enable_asynccancel
+# define __local_disable_asynccancel __libc_disable_asynccancel
+# define __local_multiple_threads __libc_multiple_threads
+# endif
+
+# ifdef PIC
+# define CENABLE bsr ra, __local_enable_asynccancel !samegp
+# define CDISABLE bsr ra, __local_disable_asynccancel !samegp
+# else
+# define CENABLE jsr ra, __local_enable_asynccancel; ldgp ra, 0(gp)
+# define CDISABLE jsr ra, __local_disable_asynccancel; ldgp ra, 0(gp)
+# endif
+
+# ifndef __ASSEMBLER__
+extern int __local_multiple_threads attribute_hidden;
+# define SINGLE_THREAD_P \
+ __builtin_expect (__local_multiple_threads == 0, 1)
+# elif defined(PIC)
+# define SINGLE_THREAD_P(reg) ldl reg, __local_multiple_threads(gp) !gprel
+# else
+# define SINGLE_THREAD_P(reg) \
+ ldah reg, __local_multiple_threads(gp) !gprelhigh; \
+ ldl reg, __local_multiple_threads(reg) !gprellow
+# endif
+
+#elif !defined __ASSEMBLER__
+
+/* This code should never be used but we define it anyhow. */
+# define SINGLE_THREAD_P (1)
+
+#endif