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/* Copyright (C) 1992, 93, 95-99, 2000 Free Software Foundation,
Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>, August 1995.
Changed by Kaz Kojima, <kkojima@rr.iij4u.or.jp>.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _LINUX_SH_SYSDEP_H
#define _LINUX_SH_SYSDEP_H 1
/* There is some commonality. */
#include <sysdeps/unix/sh/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
#define SYS_ify(syscall_name) (__NR_##syscall_name)
#ifdef __ASSEMBLER__
/* Linux uses a negative return value to indicate syscall errors,
unlike most Unices, which use the condition codes' carry flag.
Since version 2.1 the return value of a system call might be
negative even if the call succeeded. E.g., the `lseek' system call
might return a large offset. Therefore we must not anymore test
for < 0, but test for a real error by making sure the value in R0
is a real error number. Linus said he will make sure the no syscall
returns a value in -1 .. -4095 as a valid result so we can savely
test with -4095. */
#define _IMM12 #-12
#undef PSEUDO
#ifdef SHARED
#define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name); \
DO_CALL (args, syscall_name); \
mov r0,r1; \
mov _IMM12,r2; \
shad r2,r1; \
not r1,r1; \
tst r1,r1; \
bf 1f; \
mov r0,r4; \
mov.l r12,@-r15; \
sts.l pr,@-r15; \
mov.l 0f,r12; \
mova 0f,r0; \
add r0,r12; \
mov.l 2f,r1; \
mova 2f,r0; \
add r0,r1; \
jsr @r1; \
nop; \
lds.l @r15+,pr; \
rts; \
mov.l @r15+,r12; \
.align 2; \
2: .long PLTJMP(C_SYMBOL_NAME(__syscall_error)); \
0: .long _GLOBAL_OFFSET_TABLE_; \
1:
#else
#define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name); \
DO_CALL (args, syscall_name); \
mov r0,r1; \
mov _IMM12,r2; \
shad r2,r1; \
not r1,r1; \
tst r1,r1; \
bf 1f; \
mov.l 2f,r1; \
jmp @r1; \
mov r0, r4; \
.align 2; \
2: .long PLTJMP(C_SYMBOL_NAME(__syscall_error)); \
1:
#endif
#undef PSEUDO_END
#define PSEUDO_END(name) \
SYSCALL_ERROR_HANDLER \
END (name)
#define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */
#define SYSCALL_INST0 trapa #0x10
#define SYSCALL_INST1 trapa #0x11
#define SYSCALL_INST2 trapa #0x12
#define SYSCALL_INST3 trapa #0x13
#define SYSCALL_INST4 trapa #0x14
#define SYSCALL_INST5 mov.l @(0,r15),r0; trapa #0x15
#define SYSCALL_INST6 mov.l @(0,r15),r0; mov.l @(4,r15),r1; trapa #0x16
#undef DO_CALL
#define DO_CALL(args, syscall_name) \
mov.l 1f,r3; \
SYSCALL_INST##args; \
bra 2f; \
nop; \
.align 2; \
1: .long SYS_ify (syscall_name); \
2:
#else /* not __ASSEMBLER__ */
#define SYSCALL_INST_STR0 "trapa #0x10\n\t"
#define SYSCALL_INST_STR1 "trapa #0x11\n\t"
#define SYSCALL_INST_STR2 "trapa #0x12\n\t"
#define SYSCALL_INST_STR3 "trapa #0x13\n\t"
#define SYSCALL_INST_STR4 "trapa #0x14\n\t"
#define SYSCALL_INST_STR5 "trapa #0x15\n\t"
#define SYSCALL_INST_STR6 "trapa #0x16\n\t"
#define ASMFMT_0
#define ASMFMT_1 \
, "r" (r4)
#define ASMFMT_2 \
, "r" (r4), "r" (r5)
#define ASMFMT_3 \
, "r" (r4), "r" (r5), "r" (r6)
#define ASMFMT_4 \
, "r" (r4), "r" (r5), "r" (r6), "r" (r7)
#define ASMFMT_5 \
, "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0)
#define ASMFMT_6 \
, "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0), "r" (r1)
#define ASMFMT_7 \
, "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0), "r" (r1), "r" (r2)
#define SUBSTITUTE_ARGS_0()
#define SUBSTITUTE_ARGS_1(arg1) \
register long r4 asm ("%r4") = (long)(arg1)
#define SUBSTITUTE_ARGS_2(arg1, arg2) \
register long r4 asm ("%r4") = (long)(arg1); \
register long r5 asm ("%r5") = (long)(arg2)
#define SUBSTITUTE_ARGS_3(arg1, arg2, arg3) \
register long r4 asm ("%r4") = (long)(arg1); \
register long r5 asm ("%r5") = (long)(arg2); \
register long r6 asm ("%r6") = (long)(arg3)
#define SUBSTITUTE_ARGS_4(arg1, arg2, arg3, arg4) \
register long r4 asm ("%r4") = (long)(arg1); \
register long r5 asm ("%r5") = (long)(arg2); \
register long r6 asm ("%r6") = (long)(arg3); \
register long r7 asm ("%r7") = (long)(arg4)
#define SUBSTITUTE_ARGS_5(arg1, arg2, arg3, arg4, arg5) \
register long r4 asm ("%r4") = (long)(arg1); \
register long r5 asm ("%r5") = (long)(arg2); \
register long r6 asm ("%r6") = (long)(arg3); \
register long r7 asm ("%r7") = (long)(arg4); \
register long r0 asm ("%r0") = (long)(arg5)
#define SUBSTITUTE_ARGS_6(arg1, arg2, arg3, arg4, arg5, arg6) \
register long r4 asm ("%r4") = (long)(arg1); \
register long r5 asm ("%r5") = (long)(arg2); \
register long r6 asm ("%r6") = (long)(arg3); \
register long r7 asm ("%r7") = (long)(arg4); \
register long r0 asm ("%r0") = (long)(arg5); \
register long r1 asm ("%r1") = (long)(arg6)
#define SUBSTITUTE_ARGS_7(arg1, arg2, arg3, arg4, arg5, arg6, arg7) \
register long r4 asm ("%r4") = (long)(arg1); \
register long r5 asm ("%r5") = (long)(arg2); \
register long r6 asm ("%r6") = (long)(arg3); \
register long r7 asm ("%r7") = (long)(arg4); \
register long r0 asm ("%r0") = (long)(arg5) \
register long r1 asm ("%r1") = (long)(arg6); \
register long r2 asm ("%r2") = (long)(arg7)
#undef INLINE_SYSCALL
#define INLINE_SYSCALL(name, nr, args...) \
({ \
unsigned long resultvar; \
register long r3 asm ("%r3") = SYS_ify (name); \
SUBSTITUTE_ARGS_##nr(args); \
\
asm volatile (SYSCALL_INST_STR##nr \
: "=z" (resultvar) \
: "r" (r3) ASMFMT_##nr \
: "memory"); \
\
if (resultvar >= 0xfffff001) \
{ \
__set_errno (-resultvar); \
resultvar = 0xffffffff; \
} \
(int) resultvar; })
#endif /* __ASSEMBLER__ */
#endif /* linux/sh/sysdep.h */
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