Definition for cancelable system calls.
authordrepper <drepper>
Mon, 10 Feb 2003 09:21:42 +0000 (09:21 +0000)
committerdrepper <drepper>
Mon, 10 Feb 2003 09:21:42 +0000 (09:21 +0000)
nptl/sysdeps/unix/sysv/linux/sh/sysdep-cancel.h [new file with mode: 0644]

diff --git a/nptl/sysdeps/unix/sysv/linux/sh/sysdep-cancel.h b/nptl/sysdeps/unix/sysv/linux/sh/sysdep-cancel.h
new file mode 100644 (file)
index 0000000..07bac6d
--- /dev/null
@@ -0,0 +1,140 @@
+/* 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>
+#include <tls.h>
+#ifndef __ASSEMBLER__
+# include <nptl/pthreadP.h>
+#endif
+
+#if !defined NOT_IN_libc || defined IS_IN_libpthread
+
+# define _IMM12 #-12
+# define _IMM16 #-16
+# define _IMP16 #16
+# undef PSEUDO
+# define PSEUDO(name, syscall_name, args) \
+  .text; \
+  ENTRY (name); \
+    SINGLE_THREAD_P; \
+    bf .Lpseudo_cancel; \
+    DO_CALL (syscall_name, args); \
+    mov r0,r1; \
+    mov _IMM12,r2; \
+    shad r2,r1; \
+    not r1,r1; \
+    tst r1,r1; \
+    bt .Lsyscall_error; \
+    bra .Lpseudo_end; \
+     nop; \
+ .Lpseudo_cancel: \
+    sts.l pr,@-r15; \
+    add _IMM16,r15; \
+    SAVE_ARGS_##args; \
+    CENABLE; \
+    LOAD_ARGS_##args; \
+    add _IMP16,r15; \
+    lds.l @r15+,pr; \
+    DO_CALL(syscall_name, args); \
+    SYSCALL_INST_PAD; \
+    sts.l pr,@-r15; \
+    mov.l r0,@-r15; \
+    CDISABLE; \
+    mov.l @r15+,r0; \
+    lds.l @r15+,pr; \
+    mov r0,r1; \
+    mov _IMM12,r2; \
+    shad r2,r1; \
+    not r1,r1; \
+    tst r1,r1; \
+    bf .Lpseudo_end; \
+ .Lsyscall_error: \
+    SYSCALL_ERROR_HANDLER; \
+ .Lpseudo_end:
+
+# undef PSEUDO_END
+# define PSEUDO_END(sym) \
+  END (sym)
+
+# define SAVE_ARGS_0   /* Nothing.  */
+# define SAVE_ARGS_1   SAVE_ARGS_0; mov.l r4,@(0,r15)
+# define SAVE_ARGS_2   SAVE_ARGS_1; mov.l r5,@(4,r15)
+# define SAVE_ARGS_3   SAVE_ARGS_2; mov.l r6,@(8,r15)
+# define SAVE_ARGS_4   SAVE_ARGS_3; mov.l r7,@(12,r15)
+# define SAVE_ARGS_5   SAVE_ARGS_4
+# define SAVE_ARGS_6   SAVE_ARGS_5
+
+# define LOAD_ARGS_0   /* Nothing.  */
+# define LOAD_ARGS_1   LOAD_ARGS_0; mov.l @(0,r15),r4
+# define LOAD_ARGS_2   LOAD_ARGS_1; mov.l @(4,r15),r5
+# define LOAD_ARGS_3   LOAD_ARGS_2; mov.l @(8,r15),r6
+# define LOAD_ARGS_4   LOAD_ARGS_3; mov.l @(12,r15),r7
+# define LOAD_ARGS_5   LOAD_ARGS_4
+# define LOAD_ARGS_6   LOAD_ARGS_5
+
+# ifdef IS_IN_libpthread
+#  define __local_enable_asynccancel   __pthread_enable_asynccancel
+#  define __local_disable_asynccancel  __pthread_disable_asynccancel
+# else
+#  define __local_enable_asynccancel   __libc_enable_asynccancel
+#  define __local_disable_asynccancel  __libc_disable_asynccancel
+# endif
+
+# define CENABLE \
+       mov.l 1f,r0; \
+       bsrf r0; \
+        nop; \
+     0: bra 2f; \
+        nop; \
+       .align 2; \
+     1: .long __local_enable_asynccancel - 0b; \
+     2:
+
+# define CDISABLE \
+       mov.l 1f,r0; \
+       bsrf r0; \
+        nop; \
+     0: bra 2f; \
+        nop; \
+       .align 2; \
+     1: .long __local_disable_asynccancel - 0b; \
+     2:
+
+# ifndef __ASSEMBLER__
+#  define SINGLE_THREAD_P \
+  __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
+                                  header.data.multiple_threads) == 0, 1)
+# else
+#  define SINGLE_THREAD_P \
+       stc gbr,r0; \
+       mov.w 0f,r1; \
+       sub r1,r0; \
+       mov.l @(MULTIPLE_THREADS_OFFSET,r0),r0; \
+       bra 1f; \
+        tst r0,r0; \
+     0: .word TLS_PRE_TCB_SIZE; \
+     1:
+
+# endif
+
+#elif !defined __ASSEMBLER__
+
+/* This code should never be used but we define it anyhow.  */
+# define SINGLE_THREAD_P (1)
+
+#endif