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