From a8d9ee1f663268a01583923a792d5ede5cd4a0f8 Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Sun, 15 Jun 2003 01:08:45 +0000
Subject: Implement syscall() for powerpc.  Fixup syscall code so it compiles
 properly with gcc 3.3.  -Erik

---
 libc/sysdeps/linux/powerpc/Makefile        |  3 +-
 libc/sysdeps/linux/powerpc/_mmap.c         |  2 +-
 libc/sysdeps/linux/powerpc/bits/syscalls.h | 25 +++++++++--------
 libc/sysdeps/linux/powerpc/syscall.S       | 45 ++++++++++++++++++++++++++++++
 4 files changed, 61 insertions(+), 14 deletions(-)
 create mode 100644 libc/sysdeps/linux/powerpc/syscall.S

(limited to 'libc')

diff --git a/libc/sysdeps/linux/powerpc/Makefile b/libc/sysdeps/linux/powerpc/Makefile
index 8e979a1e8..e19da0fba 100644
--- a/libc/sysdeps/linux/powerpc/Makefile
+++ b/libc/sysdeps/linux/powerpc/Makefile
@@ -24,7 +24,8 @@ CRT0_SRC = crt0.S
 CRT0_OBJ = crt0.o crt1.o gcrt1.o
 CRT0_DEPS=gmon-start.S
 
-SSRC=__longjmp.S setjmp.S bsd-setjmp.S bsd-_setjmp.S brk.S clone.S __uClibc_syscall.S
+SSRC=__longjmp.S setjmp.S bsd-setjmp.S bsd-_setjmp.S brk.S \
+	clone.S __uClibc_syscall.S syscall.S
 ifeq ($(strip $(UCLIBC_PROFILING)),y)
 SSRC+=mcount.S
 endif
diff --git a/libc/sysdeps/linux/powerpc/_mmap.c b/libc/sysdeps/linux/powerpc/_mmap.c
index 350f4c49e..ec4bfd1f9 100644
--- a/libc/sysdeps/linux/powerpc/_mmap.c
+++ b/libc/sysdeps/linux/powerpc/_mmap.c
@@ -5,7 +5,7 @@
 #include <sys/syscall.h>
 
 #define __syscall_clobbers \
-	"r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
+	"r9", "r10", "r11", "r12"
 #define __syscall_return(type) \
 	return (__sc_err & 0x10000000 ? errno = __sc_ret, __sc_ret = -1 : 0), \
 	       (type) __sc_ret
diff --git a/libc/sysdeps/linux/powerpc/bits/syscalls.h b/libc/sysdeps/linux/powerpc/bits/syscalls.h
index ec9e8507f..ac7395097 100644
--- a/libc/sysdeps/linux/powerpc/bits/syscalls.h
+++ b/libc/sysdeps/linux/powerpc/bits/syscalls.h
@@ -11,30 +11,31 @@
 #include <bits/sysnum.h>
 
 
-#define STRINGIFY(s) STRINGIFY2 (s)
-#define STRINGIFY2(s) #s
+#define __STRINGIFY(s) __STRINGIFY2 (s)
+#define __STRINGIFY2(s) #s
 
+#undef JUMPTARGET
 #ifdef __PIC__
-#define JUMPTARGET(name) STRINGIFY(name##@plt)
+#define __MAKE_SYSCALL	__STRINGIFY(__uClibc_syscall@plt)
 #else
-#define JUMPTARGET(name) STRINGIFY(name)
+#define __MAKE_SYSCALL	__STRINGIFY(__uClibc_syscall)
 #endif
 
 #define unified_syscall_body(name)			\
 	__asm__ (					\
 	".section \".text\"\n\t"			\
 	".align 2\n\t"					\
-	".globl " STRINGIFY(name) "\n\t"				\
-	".type " STRINGIFY(name) ",@function\n"			\
-	#name":\n\tli 0," STRINGIFY(__NR_##name) "\n\t"	\
-	"b " JUMPTARGET(__uClibc_syscall) "\n"		\
-	".Lfe1" STRINGIFY(name) ":\n\t"				\
-	".size\t" STRINGIFY(name) ",.Lfe1" STRINGIFY(name) "-" STRINGIFY(name) "\n"	\
+	".globl " __STRINGIFY(name) "\n\t"		\
+	".type " __STRINGIFY(name) ",@function\n\t"	\
+	#name":\n\tli 0," __STRINGIFY(__NR_##name) "\n\t"	\
+	"b " __MAKE_SYSCALL "\n\t"		\
+	".Lfe1" __STRINGIFY(name) ":\n\t"			\
+	".size\t" __STRINGIFY(name) ",.Lfe1" __STRINGIFY(name) "-" __STRINGIFY(name) "\n"	\
 	)
 
 #undef _syscall0
-#define _syscall0(type,name)						\
-type name(void);							\
+#define _syscall0(type,name)				\
+type name(void);					\
 unified_syscall_body(name)
 
 #undef _syscall1
diff --git a/libc/sysdeps/linux/powerpc/syscall.S b/libc/sysdeps/linux/powerpc/syscall.S
new file mode 100644
index 000000000..71f711931
--- /dev/null
+++ b/libc/sysdeps/linux/powerpc/syscall.S
@@ -0,0 +1,45 @@
+/* Copyright (C) 1991, 1992, 1997, 1999 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 <features.h>
+
+	.section ".text"
+	.globl	syscall;
+	.type	syscall,@function;
+	.align  2;
+
+.globl syscall;
+.type syscall,@function;
+.align 2;
+
+syscall:
+	mr 0,3
+	mr 3,4
+	mr 4,5
+	mr 5,6
+	mr 6,7
+	mr 7,8
+	sc
+	bnslr;
+#ifdef __PIC__
+	b __syscall_error@plt
+#else
+	b __syscall_error
+#endif
+
+.size syscall,.-syscall
-- 
cgit v1.2.3