mips/sysdep.h: Unify mips sysdep.h

Signed-off-by: Khem Raj <raj.khem@gmail.com>

1 files changed, 350 insertions, 16 deletions

diff --git a/libc/sysdeps/linux/mips/sysdep.h b/libc/sysdeps/linux/mips/sysdep.h
index 38d4ce903..0c30e20d7 100644
--- a/libc/sysdeps/linux/mips/sysdep.h
+++ b/libc/sysdeps/linux/mips/sysdep.h
@@ -1,6 +1,4 @@
-/* Adapted from glibc's sysdeps/unix/mips/sysdep.h */
-
-/* Copyright (C) 1992, 1995, 1997, 1999, 2000, 2002, 2003
+/* Copyright (C) 1992, 1995, 1997, 1999, 2000, 2002, 2003, 2004
    Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Brendan Kehoe (brendan@zen.org).
@@ -20,28 +18,72 @@
    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
    02111-1307 USA.  */
 
-#include <features.h>
+#ifndef _LINUX_MIPS_SYSDEP_H
+#define _LINUX_MIPS_SYSDEP_H 1
+
+#include <sgidefs.h>
+#include <common/sysdep.h>
 
-#if __UCLIBC_HAS_THREADS_NATIVE__
-#include_next <sysdep.h>
+/* For Linux we can use the system call table in the header file
+   /usr/include/asm/unistd.h
+   of the kernel.  But these symbols do not follow the SYS_* syntax
+   so we have to redefine the `SYS_ify' macro here.  */
 
+#undef SYS_ify
+#ifdef __STDC__
+# define SYS_ify(syscall_name)	__NR_##syscall_name
 #else
+# define SYS_ify(syscall_name)	__NR_/**/syscall_name
+#endif
 
 #ifdef __ASSEMBLER__
 
-#include <sgidefs.h>
-#include <sys/regdef.h>
+#include <regdef.h>
 
-#define ENTRY(name) \
-  .globl name;                                                                \
-  .align 2;                                                                   \
-  .ent name,0;                                                                \
+#define ENTRY(name) 					\
+  .globl name;						\
+  .align 2;						\
+  .ent name,0;						\
   name##:
 
 #undef END
-#define END(function)                                   \
-                .end    function;                       \
-                .size   function,.-function
+#define	END(function)					\
+		.end	function;			\
+		.size	function,.-function
+
+#define ret	j ra ; nop
+
+#undef PSEUDO_END
+#define PSEUDO_END(sym) .end sym; .size sym,.-sym
+
+#define PSEUDO_NOERRNO(name, syscall_name, args)	\
+  .align 2;						\
+  ENTRY(name)						\
+  .set noreorder;					\
+  li v0, SYS_ify(syscall_name);				\
+  syscall
+
+#undef PSEUDO_END_NOERRNO
+#define PSEUDO_END_NOERRNO(sym) .end sym; .size sym,.-sym
+
+#define ret_NOERRNO ret
+
+#define PSEUDO_ERRVAL(name, syscall_name, args)		\
+  .align 2;						\
+  ENTRY(name)						\
+  .set noreorder;					\
+  li v0, SYS_ify(syscall_name);				\
+  syscall
+
+#undef PSEUDO_END_ERRVAL
+#define PSEUDO_END_ERRVAL(sym) .end sym; .size sym,.-sym
+
+#define ret_ERRVAL ret
+
+#define r0	v0
+#define r1	v1
+/* The mips move insn is d,s.  */
+#define MOVE(x,y)	move y , x
 
 #if _MIPS_SIM == _ABIO32
 # define L(label) $L ## label
@@ -49,6 +91,298 @@
 # define L(label) .L ## label
 #endif
 
+/* Note that while it's better structurally, going back to call __syscall_error
+   can make things confusing if you're debugging---it looks like it's jumping
+   backwards into the previous fn.  */
+
+#ifdef __PIC__
+#define PSEUDO(name, syscall_name, args) 		\
+  .align 2;						\
+  99: la t9,__syscall_error;				\
+  jr t9;						\
+  ENTRY(name)						\
+  .set noreorder;					\
+  .cpload t9;						\
+  li v0, SYS_ify(syscall_name);				\
+  syscall;						\
+  .set reorder;						\
+  bne a3, zero, 99b;					\
+L(syse1):
+#else
+#define PSEUDO(name, syscall_name, args) 		\
+  .set noreorder;					\
+  .align 2;						\
+  99: j __syscall_error;				\
+  nop;							\
+  ENTRY(name)						\
+  .set noreorder;					\
+  li v0, SYS_ify(syscall_name);				\
+  syscall;						\
+  .set reorder;						\
+  bne a3, zero, 99b;					\
+L(syse1):
+#endif
+
+/* We don't want the label for the error handler to be visible in the symbol
+   table when we define it here.  */
+#ifdef __PIC__
+# define SYSCALL_ERROR_LABEL 99b
 #endif
 
-#endif /* __UCLIBC_HAS_THREADS_NATIVE__ */
+#else   /* ! __ASSEMBLER__ */
+
+/* Define a macro which expands into the inline wrapper code for a system
+   call.  */
+#undef INLINE_SYSCALL
+#define INLINE_SYSCALL(name, nr, args...)				\
+  ({ INTERNAL_SYSCALL_DECL(err);					\
+     long result_var = INTERNAL_SYSCALL (name, err, nr, args);		\
+     if ( INTERNAL_SYSCALL_ERROR_P (result_var, err) )			\
+       {								\
+	 __set_errno (INTERNAL_SYSCALL_ERRNO (result_var, err));	\
+	 result_var = -1L;						\
+       }								\
+     result_var; })
+
+#undef INTERNAL_SYSCALL_DECL
+#define INTERNAL_SYSCALL_DECL(err) long err
+
+#undef INTERNAL_SYSCALL_ERROR_P
+#define INTERNAL_SYSCALL_ERROR_P(val, err)   ((long) (err))
+
+#undef INTERNAL_SYSCALL_ERRNO
+#define INTERNAL_SYSCALL_ERRNO(val, err)     (val)
+
+#undef INTERNAL_SYSCALL
+#define INTERNAL_SYSCALL(name, err, nr, args...) \
+	internal_syscall##nr (, "li\t$2, %2\t\t\t# " #name "\n\t",	\
+			      "i" (SYS_ify (name)), err, args)
+
+#undef INTERNAL_SYSCALL_NCS
+#define INTERNAL_SYSCALL_NCS(number, err, nr, args...) \
+	internal_syscall##nr (= number, , "r" (__v0), err, args)
+#undef internal_syscall0
+#define internal_syscall0(ncs_init, cs_init, input, err, dummy...)	\
+({									\
+	long _sys_result;						\
+									\
+	{								\
+	register long __v0 __asm__("$2") ncs_init;			\
+	register long __a3 __asm__("$7");				\
+	__asm__ volatile (						\
+	".set\tnoreorder\n\t"						\
+	cs_init								\
+	"syscall\n\t"							\
+	".set reorder"							\
+	: "=r" (__v0), "=r" (__a3)					\
+	: input								\
+	: __SYSCALL_CLOBBERS);						\
+	err = __a3;							\
+	_sys_result = __v0;						\
+	}								\
+	_sys_result;							\
+})
+
+#undef internal_syscall1
+#define internal_syscall1(ncs_init, cs_init, input, err, arg1)		\
+({									\
+	long _sys_result;						\
+									\
+	{								\
+	register long __v0 __asm__("$2") ncs_init;			\
+	register long __a0 __asm__("$4") = (long) arg1;			\
+	register long __a3 __asm__("$7");				\
+	__asm__ volatile (						\
+	".set\tnoreorder\n\t"						\
+	cs_init								\
+	"syscall\n\t"							\
+	".set reorder"							\
+	: "=r" (__v0), "=r" (__a3)					\
+	: input, "r" (__a0)						\
+	: __SYSCALL_CLOBBERS);						\
+	err = __a3;							\
+	_sys_result = __v0;						\
+	}								\
+	_sys_result;							\
+})
+
+#undef internal_syscall2
+#define internal_syscall2(ncs_init, cs_init, input, err, arg1, arg2)	\
+({									\
+	long _sys_result;						\
+									\
+	{								\
+	register long __v0 __asm__("$2") ncs_init;			\
+	register long __a0 __asm__("$4") = (long) arg1;			\
+	register long __a1 __asm__("$5") = (long) arg2;			\
+	register long __a3 __asm__("$7");				\
+	__asm__ volatile (						\
+	".set\tnoreorder\n\t"						\
+	cs_init								\
+	"syscall\n\t"							\
+	".set\treorder"							\
+	: "=r" (__v0), "=r" (__a3)					\
+	: input, "r" (__a0), "r" (__a1)					\
+	: __SYSCALL_CLOBBERS);						\
+	err = __a3;							\
+	_sys_result = __v0;						\
+	}								\
+	_sys_result;							\
+})
+
+#undef internal_syscall3
+#define internal_syscall3(ncs_init, cs_init, input, err, arg1, arg2, arg3)\
+({									\
+	long _sys_result;						\
+									\
+	{								\
+	register long __v0 __asm__("$2") ncs_init;			\
+	register long __a0 __asm__("$4") = (long) arg1;			\
+	register long __a1 __asm__("$5") = (long) arg2;			\
+	register long __a2 __asm__("$6") = (long) arg3;			\
+	register long __a3 __asm__("$7");				\
+	__asm__ volatile (						\
+	".set\tnoreorder\n\t"						\
+	cs_init								\
+	"syscall\n\t"							\
+	".set\treorder"							\
+	: "=r" (__v0), "=r" (__a3)					\
+	: input, "r" (__a0), "r" (__a1), "r" (__a2)			\
+	: __SYSCALL_CLOBBERS);						\
+	err = __a3;							\
+	_sys_result = __v0;						\
+	}								\
+	_sys_result;							\
+})
+
+#undef internal_syscall4
+#define internal_syscall4(ncs_init, cs_init, input, err, arg1, arg2, arg3, arg4)\
+({									\
+	long _sys_result;						\
+									\
+	{								\
+	register long __v0 __asm__("$2") ncs_init;			\
+	register long __a0 __asm__("$4") = (long) arg1;			\
+	register long __a1 __asm__("$5") = (long) arg2;			\
+	register long __a2 __asm__("$6") = (long) arg3;			\
+	register long __a3 __asm__("$7") = (long) arg4;			\
+	__asm__ volatile (						\
+	".set\tnoreorder\n\t"						\
+	cs_init								\
+	"syscall\n\t"							\
+	".set\treorder"							\
+	: "=r" (__v0), "+r" (__a3)					\
+	: input, "r" (__a0), "r" (__a1), "r" (__a2)			\
+	: __SYSCALL_CLOBBERS);						\
+	err = __a3;							\
+	_sys_result = __v0;						\
+	}								\
+	_sys_result;							\
+})
+
+/* We need to use a frame pointer for the functions in which we
+   adjust $sp around the syscall, or debug information and unwind
+   information will be $sp relative and thus wrong during the syscall.  As
+   of GCC 3.4.3, this is sufficient.  */
+#define FORCE_FRAME_POINTER alloca (4)
+
+#undef internal_syscall5
+#define internal_syscall5(ncs_init, cs_init, input, err, arg1, arg2, arg3, arg4, arg5)\
+({									\
+	long _sys_result;						\
+									\
+	FORCE_FRAME_POINTER;						\
+	{								\
+	register long __v0 __asm__("$2") ncs_init;			\
+	register long __a0 __asm__("$4") = (long) arg1;			\
+	register long __a1 __asm__("$5") = (long) arg2;			\
+	register long __a2 __asm__("$6") = (long) arg3;			\
+	register long __a3 __asm__("$7") = (long) arg4;			\
+	__asm__ volatile (						\
+	".set\tnoreorder\n\t"						\
+	"subu\t$29, 32\n\t"						\
+	"sw\t%6, 16($29)\n\t"						\
+	cs_init								\
+	"syscall\n\t"							\
+	"addiu\t$29, 32\n\t"						\
+	".set\treorder"							\
+	: "=r" (__v0), "+r" (__a3)					\
+	: input, "r" (__a0), "r" (__a1), "r" (__a2),			\
+	  "r" ((long)arg5)						\
+	: __SYSCALL_CLOBBERS);						\
+	err = __a3;							\
+	_sys_result = __v0;						\
+	}								\
+	_sys_result;							\
+})
+
+#undef internal_syscall6
+#define internal_syscall6(ncs_init, cs_init, input, err, arg1, arg2, arg3, arg4, arg5, arg6)\
+({									\
+	long _sys_result;						\
+									\
+	FORCE_FRAME_POINTER;						\
+	{								\
+	register long __v0 __asm__("$2") ncs_init;			\
+	register long __a0 __asm__("$4") = (long) arg1;			\
+	register long __a1 __asm__("$5") = (long) arg2;			\
+	register long __a2 __asm__("$6") = (long) arg3;			\
+	register long __a3 __asm__("$7") = (long) arg4;			\
+	__asm__ volatile (						\
+	".set\tnoreorder\n\t"						\
+	"subu\t$29, 32\n\t"						\
+	"sw\t%6, 16($29)\n\t"						\
+	"sw\t%7, 20($29)\n\t"						\
+	cs_init								\
+	"syscall\n\t"							\
+	"addiu\t$29, 32\n\t"						\
+	".set\treorder"							\
+	: "=r" (__v0), "+r" (__a3)					\
+	: input, "r" (__a0), "r" (__a1), "r" (__a2),			\
+	  "r" ((long)arg5), "r" ((long)arg6)				\
+	: __SYSCALL_CLOBBERS);						\
+	err = __a3;							\
+	_sys_result = __v0;						\
+	}								\
+	_sys_result;							\
+})
+
+#undef internal_syscall7
+#define internal_syscall7(ncs_init, cs_init, input, err, arg1, arg2, arg3, arg4, arg5, arg6, arg7)\
+({									\
+	long _sys_result;						\
+									\
+	FORCE_FRAME_POINTER;						\
+	{								\
+	register long __v0 __asm__("$2") ncs_init;			\
+	register long __a0 __asm__("$4") = (long) arg1;			\
+	register long __a1 __asm__("$5") = (long) arg2;			\
+	register long __a2 __asm__("$6") = (long) arg3;			\
+	register long __a3 __asm__("$7") = (long) arg4;			\
+	__asm__ volatile (						\
+	".set\tnoreorder\n\t"						\
+	"subu\t$29, 32\n\t"						\
+	"sw\t%6, 16($29)\n\t"						\
+	"sw\t%7, 20($29)\n\t"						\
+	"sw\t%8, 24($29)\n\t"						\
+	cs_init								\
+	"syscall\n\t"							\
+	"addiu\t$29, 32\n\t"						\
+	".set\treorder"							\
+	: "=r" (__v0), "+r" (__a3)					\
+	: input, "r" (__a0), "r" (__a1), "r" (__a2),			\
+	  "r" ((long)arg5), "r" ((long)arg6), "r" ((long)arg7)		\
+	: __SYSCALL_CLOBBERS);						\
+	err = __a3;							\
+	_sys_result = __v0;						\
+	}								\
+	_sys_result;							\
+})
+
+#undef __SYSCALL_CLOBBERS
+#define __SYSCALL_CLOBBERS "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", \
+	"$14", "$15", "$24", "$25", "memory"
+
+
+#endif  /* __ASSEMBLER__ */
+#endif /* _LINUX_MIPS_SYSDEP_H */