Syscall handling with cancellation support for Linux/SPARC64.
authordrepper <drepper>
Sun, 31 Aug 2003 17:39:28 +0000 (17:39 +0000)
committerdrepper <drepper>
Sun, 31 Aug 2003 17:39:28 +0000 (17:39 +0000)
nptl/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep-cancel.h [new file with mode: 0644]

diff --git a/nptl/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep-cancel.h b/nptl/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep-cancel.h
new file mode 100644 (file)
index 0000000..0835c91
--- /dev/null
@@ -0,0 +1,101 @@
+/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2002.
+
+   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 || defined IS_IN_librt
+
+# undef PSEUDO
+# define PSEUDO(name, syscall_name, args)                                    \
+       .text;                                                                \
+ENTRY(name)                                                                  \
+       ld [%g7 + MULTIPLE_THREADS_OFFSET], %g1;                              \
+       brnz,pn %g1, 1f;                                                      \
+        mov SYS_ify(syscall_name), %g1;                                      \
+       ta 0x6d;                                                              \
+       bcs,pn %xcc, __syscall_error_handler;                                 \
+        nop;                                                                 \
+       .subsection 2;                                                        \
+1:     save %sp, -192, %sp;                                                  \
+       CENABLE;                                                              \
+        nop;                                                                 \
+       mov %o0, %l0;                                                         \
+       COPY_ARGS_##args                                                      \
+       mov SYS_ify(syscall_name), %g1;                                       \
+       ta 0x6d;                                                              \
+       bcs,pn %xcc, __syscall_error_handler2;                                \
+        mov %o0, %l1;                                                        \
+       CDISABLE;                                                             \
+        mov %l0, %o0;                                                        \
+       jmpl %i7 + 8, %g0;                                                    \
+        restore %g0, %l1, %o0;                                               \
+       .previous;                                                            \
+       SYSCALL_ERROR_HANDLER                                                 \
+       SYSCALL_ERROR_HANDLER2
+
+#define SYSCALL_ERROR_HANDLER2                                               \
+SYSCALL_ERROR_HANDLER_ENTRY(__syscall_error_handler2)                        \
+       .global __errno_location;                                             \
+        .type   __errno_location,@function;                                  \
+       call   __errno_location;                                              \
+        nop;                                                                 \
+       st      %l1, [%o0];                                                   \
+       jmpl    %i7 + 8, %g0;                                                 \
+        restore %g0, -1, %o0;                                                \
+       .previous;
+
+# ifdef IS_IN_libpthread
+#  define CENABLE      call __pthread_enable_asynccancel
+#  define CDISABLE     call __pthread_disable_asynccancel
+# elif !defined NOT_IN_libc
+#  define CENABLE      call __libc_enable_asynccancel
+#  define CDISABLE     call __libc_disable_asynccancel
+# elif defined IS_IN_librt
+#  define CENABLE      call __librt_enable_asynccancel
+#  define CDISABLE     call __librt_disable_asynccancel
+# else
+#  error Unsupported library
+# endif
+
+#define COPY_ARGS_0    /* Nothing */
+#define COPY_ARGS_1    COPY_ARGS_0 mov %i0, %o0;
+#define COPY_ARGS_2    COPY_ARGS_1 mov %i1, %o1;
+#define COPY_ARGS_3    COPY_ARGS_2 mov %i2, %o2;
+#define COPY_ARGS_4    COPY_ARGS_3 mov %i3, %o3;
+#define COPY_ARGS_5    COPY_ARGS_4 mov %i4, %o4;
+#define COPY_ARGS_6    COPY_ARGS_5 mov %i5, %o5;
+
+# ifndef __ASSEMBLER__
+#  define SINGLE_THREAD_P \
+  __builtin_expect (THREAD_GETMEM (THREAD_SELF,                                      \
+                                  header.multiple_threads) == 0, 1)
+# else
+#  define SINGLE_THREAD_P ld [%g7 + MULTIPLE_THREADS_OFFSET], %g1
+# endif
+
+#elif !defined __ASSEMBLER__
+
+/* This code should never be used but we define it anyhow.  */
+# define SINGLE_THREAD_P (1)
+
+#endif