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1 /* Copyright (C) 1992,1993,1995,1996,1997,1998,1999,2000,2002,2003,2004
2 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>, August 1995.
5 Changed by Kaz Kojima, <kkojima@rr.iij4u.or.jp>.
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; if not, write to the Free
19 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
22 #ifndef _LINUX_SH_SYSDEP_H
23 #define _LINUX_SH_SYSDEP_H 1
25 /* There is some commonality. */
26 #include <sysdeps/unix/sh/sysdep.h>
28 /* For Linux we can use the system call table in the header file
29 /usr/include/asm/unistd.h
30 of the kernel. But these symbols do not follow the SYS_* syntax
31 so we have to redefine the `SYS_ify' macro here. */
33 #define SYS_ify(syscall_name) (__NR_##syscall_name)
38 /* Linux uses a negative return value to indicate syscall errors,
39 unlike most Unices, which use the condition codes' carry flag.
41 Since version 2.1 the return value of a system call might be
42 negative even if the call succeeded. E.g., the `lseek' system call
43 might return a large offset. Therefore we must not anymore test
44 for < 0, but test for a real error by making sure the value in R0
45 is a real error number. Linus said he will make sure the no syscall
46 returns a value in -1 .. -4095 as a valid result so we can savely
52 #define PSEUDO(name, syscall_name, args) \
55 DO_CALL (syscall_name, args); \
62 SYSCALL_ERROR_HANDLER; \
66 #define PSEUDO_END(name) \
70 #define PSEUDO_NOERRNO(name, syscall_name, args) \
73 DO_CALL (syscall_name, args)
75 #undef PSEUDO_END_NOERRNO
76 #define PSEUDO_END_NOERRNO(name) \
79 #define ret_NOERRNO ret
81 #define PSEUDO_ERRVAL(name, syscall_name, args) \
84 DO_CALL (syscall_name, args);
86 #undef PSEUDO_END_ERRVAL
87 #define PSEUDO_END_ERRVAL(name) \
90 #define ret_ERRVAL ret
93 # define SYSCALL_ERROR_HANDLER \
98 0: .long __syscall_error
100 # if RTLD_PRIVATE_ERRNO
101 # define SYSCALL_ERROR_HANDLER \
111 0: .long _GLOBAL_OFFSET_TABLE_
; \
112 1: .long rtld_errno@GOTOFF
114 # elif defined _LIBC_REENTRANT
118 # define SYSCALL_ERROR_ERRNO __libc_errno
120 # define SYSCALL_ERROR_ERRNO errno
122 # define SYSCALL_ERROR_HANDLER \
130 mov.l @(r0,r12),r0; \
137 0: .long _GLOBAL_OFFSET_TABLE_; \
138 1: .long SYSCALL_ERROR_ERRNO@GOTTPOFF
140 # define SYSCALL_ERROR_HANDLER \
162 0: .long _GLOBAL_OFFSET_TABLE_; \
163 1: .long PLTJMP(C_SYMBOL_NAME(__errno_location))-(2b-.)
164 /* A quick note: it is assumed that the call to `__errno_location' does
165 not modify the stack! */
168 /* Store (-r0) into errno through the GOT. */
169 # define SYSCALL_ERROR_HANDLER \
176 mov.l @(r0,r12),r0; \
182 0: .long _GLOBAL_OFFSET_TABLE_; \
184 # endif /* _LIBC_REENTRANT */
187 # ifdef NEED_SYSCALL_INST_PAD
188 # define SYSCALL_INST_PAD \
189 or r0,r0; or r0,r0; or r0,r0; or r0,r0; or r0,r0
191 # define SYSCALL_INST_PAD
194 #define SYSCALL_INST0 trapa #0x10
195 #define SYSCALL_INST1 trapa #0x11
196 #define SYSCALL_INST2 trapa #0x12
197 #define SYSCALL_INST3 trapa #0x13
198 #define SYSCALL_INST4 trapa #0x14
199 #define SYSCALL_INST5 mov.l @(0,r15),r0; trapa #0x15
200 #define SYSCALL_INST6 mov.l @(0,r15),r0; mov.l @(4,r15),r1; trapa #0x16
203 #define DO_CALL(syscall_name, args) \
205 SYSCALL_INST##args; \
210 1: .long SYS_ify (syscall_name); \
213 #else /* not __ASSEMBLER__ */
215 #define SYSCALL_INST_STR0 "trapa #0x10\n\t"
216 #define SYSCALL_INST_STR1 "trapa #0x11\n\t"
217 #define SYSCALL_INST_STR2 "trapa #0x12\n\t"
218 #define SYSCALL_INST_STR3 "trapa #0x13\n\t"
219 #define SYSCALL_INST_STR4 "trapa #0x14\n\t"
220 #define SYSCALL_INST_STR5 "trapa #0x15\n\t"
221 #define SYSCALL_INST_STR6 "trapa #0x16\n\t"
223 # ifdef NEED_SYSCALL_INST_PAD
224 # define SYSCALL_INST_PAD "\
225 or r0,r0; or r0,r0; or r0,r0; or r0,r0; or r0,r0"
227 # define SYSCALL_INST_PAD
236 , "r" (r4), "r" (r5), "r" (r6)
238 , "r" (r4), "r" (r5), "r" (r6), "r" (r7)
240 , "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0)
242 , "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0), "r" (r1)
244 , "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0), "r" (r1), "r" (r2)
246 #define SUBSTITUTE_ARGS_0()
247 #define SUBSTITUTE_ARGS_1(arg1) \
248 long int _arg1 = (long int) (arg1); \
249 register long int r4 asm ("%r4") = (long int) (_arg1)
250 #define SUBSTITUTE_ARGS_2(arg1, arg2) \
251 long int _arg1 = (long int) (arg1); \
252 long int _arg2 = (long int) (arg2); \
253 register long int r4 asm ("%r4") = (long int) (_arg1); \
254 register long int r5 asm ("%r5") = (long int) (_arg2)
255 #define SUBSTITUTE_ARGS_3(arg1, arg2, arg3) \
256 long int _arg1 = (long int) (arg1); \
257 long int _arg2 = (long int) (arg2); \
258 long int _arg3 = (long int) (arg3); \
259 register long int r4 asm ("%r4") = (long int) (_arg1); \
260 register long int r5 asm ("%r5") = (long int) (_arg2); \
261 register long int r6 asm ("%r6") = (long int) (_arg3)
262 #define SUBSTITUTE_ARGS_4(arg1, arg2, arg3, arg4) \
263 long int _arg1 = (long int) (arg1); \
264 long int _arg2 = (long int) (arg2); \
265 long int _arg3 = (long int) (arg3); \
266 long int _arg4 = (long int) (arg4); \
267 register long int r4 asm ("%r4") = (long int) (_arg1); \
268 register long int r5 asm ("%r5") = (long int) (_arg2); \
269 register long int r6 asm ("%r6") = (long int) (_arg3); \
270 register long int r7 asm ("%r7") = (long int) (_arg4)
271 #define SUBSTITUTE_ARGS_5(arg1, arg2, arg3, arg4, arg5) \
272 long int _arg1 = (long int) (arg1); \
273 long int _arg2 = (long int) (arg2); \
274 long int _arg3 = (long int) (arg3); \
275 long int _arg4 = (long int) (arg4); \
276 long int _arg5 = (long int) (arg5); \
277 register long int r4 asm ("%r4") = (long int) (_arg1); \
278 register long int r5 asm ("%r5") = (long int) (_arg2); \
279 register long int r6 asm ("%r6") = (long int) (_arg3); \
280 register long int r7 asm ("%r7") = (long int) (_arg4); \
281 register long int r0 asm ("%r0") = (long int) (_arg5)
282 #define SUBSTITUTE_ARGS_6(arg1, arg2, arg3, arg4, arg5, arg6) \
283 long int _arg1 = (long int) (arg1); \
284 long int _arg2 = (long int) (arg2); \
285 long int _arg3 = (long int) (arg3); \
286 long int _arg4 = (long int) (arg4); \
287 long int _arg5 = (long int) (arg5); \
288 long int _arg6 = (long int) (arg6); \
289 register long int r4 asm ("%r4") = (long int)(_arg1); \
290 register long int r5 asm ("%r5") = (long int) (_arg2); \
291 register long int r6 asm ("%r6") = (long int) (_arg3); \
292 register long int r7 asm ("%r7") = (long int) (_arg4); \
293 register long int r0 asm ("%r0") = (long int) (_arg5); \
294 register long int r1 asm ("%r1") = (long int) (_arg6)
295 #define SUBSTITUTE_ARGS_7(arg1, arg2, arg3, arg4, arg5, arg6, arg7) \
296 long int _arg1 = (long int) (arg1); \
297 long int _arg2 = (long int) (arg2); \
298 long int _arg3 = (long int) (arg3); \
299 long int _arg4 = (long int) (arg4); \
300 long int _arg5 = (long int) (arg5); \
301 long int _arg6 = (long int) (arg6); \
302 long int _arg7 = (long int) (arg7); \
303 register long int r4 asm ("%r4") = (long int) (_arg1); \
304 register long int r5 asm ("%r5") = (long int) (_arg2); \
305 register long int r6 asm ("%r6") = (long int) (_arg3); \
306 register long int r7 asm ("%r7") = (long int) (_arg4); \
307 register long int r0 asm ("%r0") = (long int) (_arg5); \
308 register long int r1 asm ("%r1") = (long int) (_arg6); \
309 register long int r2 asm ("%r2") = (long int) (_arg7)
311 #undef INLINE_SYSCALL
312 #define INLINE_SYSCALL(name, nr, args...) \
314 unsigned int resultvar = INTERNAL_SYSCALL (name, , nr, args); \
315 if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (resultvar, ), 0)) \
317 __set_errno (INTERNAL_SYSCALL_ERRNO (resultvar, )); \
318 resultvar = 0xffffffff; \
322 #undef INTERNAL_SYSCALL
323 #define INTERNAL_SYSCALL(name, err, nr, args...) \
325 unsigned long int resultvar; \
326 register long int r3 asm ("%r3") = SYS_ify (name); \
327 SUBSTITUTE_ARGS_##nr(args); \
329 asm volatile (SYSCALL_INST_STR##nr SYSCALL_INST_PAD \
331 : "r" (r3) ASMFMT_##nr \
336 /* The _NCS variant allows non-constant syscall numbers. */
337 #define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
339 unsigned long int resultvar; \
340 register long int r3 asm ("%r3") = (name); \
341 SUBSTITUTE_ARGS_##nr(args); \
343 asm volatile (SYSCALL_INST_STR##nr SYSCALL_INST_PAD \
345 : "r" (r3) ASMFMT_##nr \
350 #undef INTERNAL_SYSCALL_DECL
351 #define INTERNAL_SYSCALL_DECL(err) do { } while (0)
353 #undef INTERNAL_SYSCALL_ERROR_P
354 #define INTERNAL_SYSCALL_ERROR_P(val, err) \
355 ((unsigned int) (val) >= 0xfffff001u)
357 #undef INTERNAL_SYSCALL_ERRNO
358 #define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
360 #endif /* __ASSEMBLER__ */
362 #endif /* linux/sh/sysdep.h */