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This patch implements sysdep-cancel.h for ARM.
p.
2003-01-06 Philip Blundell <philb@gnu.org>
* sysdeps/unix/sysv/linux/arm/sysdep-cancel.h: New file.
--- /dev/null 2002-09-01 12:52:15.000000000 +0100
+++ sysdeps/unix/sysv/linux/arm/sysdep-cancel.h 2003-01-06 23:17:04.000000000 +0000
@@ -0,0 +1,127 @@
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Phil Blundell <pb@nexus.co.uk>, 2003.
+
+ 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
+
+# undef PSEUDO_RET
+# define PSEUDO_RET \
+ ldrcc pc, [sp], $4; \
+ b PLTJMP(SYSCALL_ERROR)
+
+# undef PSEUDO
+# define PSEUDO(name, syscall_name, args) \
+ .section ".text"; \
+ PSEUDO_PROLOGUE; \
+ ENTRY (name) \
+ SINGLE_THREAD_P; \
+ bne .Lpseudo_cancel; \
+ DO_CALL (syscall_name, args); \
+ cmn r0, $4096; \
+ PSEUDO_RET_MOV; \
+ .Lpseudo_cancel: \
+ MAYBE_SAVE_LR; \
+ DOCARGS_##args; /* save syscall args around CENABLE. */ \
+ CENABLE; \
+ mov ip, r0; /* put mask in safe place. */ \
+ UNDOCARGS_##args; /* restore syscall args. */ \
+ swi SYS_ify (syscall_name); /* do the call. */ \
+ str r0, [sp, $-4]!; /* save syscall return value. */ \
+ mov r0, ip; /* get mask back. */ \
+ CDISABLE; \
+ ldr r0, [sp], $4; /* retrieve return value. */ \
+ UNDOC2ARGS_##args; /* fix register damage. */ \
+ cmn r0, $4096;
+
+# define DOCARGS_0
+# define UNDOCARGS_0
+# define UNDOC2ARGS_0
+
+# define DOCARGS_1 str r0, [sp, #-4]!;
+# define UNDOCARGS_1 ldr r0, [sp], #4;
+# define UNDOC2ARGS_1
+
+# define DOCARGS_2 str r1, [sp, #-4]!; str r0, [sp, #-4]!;
+# define UNDOCARGS_2 ldr r0, [sp], #4; ldr r1, [sp], #4;
+# define UNDOC2ARGS_2
+
+# define DOCARGS_3 str r2, [sp, #-4]!; str r1, [sp, #-4]!; str r0, [sp, #-4]!;
+# define UNDOCARGS_3 ldr r0, [sp], #4; ldr r1, [sp], #4; ldr r2, [sp], #4
+# define UNDOC2ARGS_3
+
+# define DOCARGS_4 stmfd sp!, {r0-r3}
+# define UNDOCARGS_4 ldmfd sp!, {r0-r3}
+# define UNDOC2ARGS_4
+
+# define DOCARGS_5 stmfd sp!, {r0-r3}
+# define UNDOCARGS_5 str r4, [sp, #-4]!; ldmfd sp, {r0-r4}
+# define UNDOC2ARGS_5 ldr r4, [sp], #20
+
+# ifdef IS_IN_libpthread
+# define CENABLE bl PLTJMP(__pthread_enable_asynccancel)
+# define CDISABLE bl PLTJMP(__pthread_disable_asynccancel)
+# define __local_multiple_threads __pthread_multiple_threads
+# else
+# define CENABLE bl PLTJMP(__libc_enable_asynccancel)
+# define CDISABLE bl PLTJMP(__libc_disable_asynccancel)
+# define __local_multiple_threads __libc_multiple_threads
+# endif
+
+# ifndef __ASSEMBLER__
+extern int __local_multiple_threads attribute_hidden;
+# define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
+# else
+# if !defined PIC
+# define SINGLE_THREAD_P \
+ ldr ip, =__local_multiple_threads; \
+ ldr ip, [ip]; \
+ teq ip, #0;
+# define MAYBE_SAVE_LR \
+ str lr, [sp, $-4]!;
+# define PSEUDO_RET_MOV \
+ RETINSTR(movcc, pc, lr); \
+ b PLTJMP(SYSCALL_ERROR)
+# define PSEUDO_PROLOGUE
+# else
+# define SINGLE_THREAD_P \
+ str lr, [sp, $-4]!; \
+ ldr ip, 1b; \
+ ldr lr, 2b; \
+3: \
+ add ip, pc, ip; \
+ ldr ip, [ip, lr]; \
+ teq ip, #0;
+# define PSEUDO_PROLOGUE \
+ 1: .word _GLOBAL_OFFSET_TABLE_ - 3f - 8; \
+ 2: .word __local_multiple_threads(GOTOFF);
+# define MAYBE_SAVE_LR /* lr already saved */
+# define PSEUDO_RET_MOV PSEUDO_RET
+# endif
+# endif
+
+#elif !defined __ASSEMBLER__
+
+/* This code should never be used but we define it anyhow. */
+# define SINGLE_THREAD_P (1)
+
+#endif
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