nsprpub/pr/include/md/_linux.h@44a2da4a2ab2
nsprpub/pr/include/md/_linux.h
Fri, 16 Jan 2015 04:50:19 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Fri, 16 Jan 2015 04:50:19 +0100
- branch
- TOR_BUG_9701
- changeset 13
- 44a2da4a2ab2
- permissions
- -rw-r--r--
Replace accessor implementation with direct member state manipulation, by
request https://trac.torproject.org/projects/tor/ticket/9701#comment:32
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 /*
7 * This file is used by not only Linux but also other glibc systems
8 * such as GNU/Hurd and GNU/k*BSD.
9 */
11 #ifndef nspr_linux_defs_h___
12 #define nspr_linux_defs_h___
14 #include "prthread.h"
16 /*
17 * Internal configuration macros
18 */
20 #define PR_LINKER_ARCH "linux"
21 #define _PR_SI_SYSNAME "LINUX"
22 #ifdef __powerpc64__
23 #define _PR_SI_ARCHITECTURE "ppc64"
24 #elif defined(__powerpc__)
25 #define _PR_SI_ARCHITECTURE "ppc"
26 #elif defined(__alpha)
27 #define _PR_SI_ARCHITECTURE "alpha"
28 #elif defined(__ia64__)
29 #define _PR_SI_ARCHITECTURE "ia64"
30 #elif defined(__x86_64__)
31 #define _PR_SI_ARCHITECTURE "x86-64"
32 #elif defined(__mc68000__)
33 #define _PR_SI_ARCHITECTURE "m68k"
34 #elif defined(__sparc__) && defined(__arch64__)
35 #define _PR_SI_ARCHITECTURE "sparc64"
36 #elif defined(__sparc__)
37 #define _PR_SI_ARCHITECTURE "sparc"
38 #elif defined(__i386__)
39 #define _PR_SI_ARCHITECTURE "x86"
40 #elif defined(__mips__)
41 #define _PR_SI_ARCHITECTURE "mips"
42 #elif defined(__arm__)
43 #define _PR_SI_ARCHITECTURE "arm"
44 #elif defined(__aarch64__)
45 #define _PR_SI_ARCHITECTURE "aarch64"
46 #elif defined(__hppa__)
47 #define _PR_SI_ARCHITECTURE "hppa"
48 #elif defined(__s390x__)
49 #define _PR_SI_ARCHITECTURE "s390x"
50 #elif defined(__s390__)
51 #define _PR_SI_ARCHITECTURE "s390"
52 #elif defined(__sh__)
53 #define _PR_SI_ARCHITECTURE "sh"
54 #elif defined(__avr32__)
55 #define _PR_SI_ARCHITECTURE "avr32"
56 #elif defined(__m32r__)
57 #define _PR_SI_ARCHITECTURE "m32r"
58 #else
59 #error "Unknown CPU architecture"
60 #endif
61 #define PR_DLL_SUFFIX ".so"
63 #define _PR_VMBASE 0x30000000
64 #define _PR_STACK_VMBASE 0x50000000
65 #define _MD_DEFAULT_STACK_SIZE 65536L
66 #define _MD_MMAP_FLAGS MAP_PRIVATE
68 #if defined(__aarch64__)
69 #define _MD_MINIMUM_STACK_SIZE 0x20000
70 #endif
72 #undef HAVE_STACK_GROWING_UP
74 /*
75 * Elf linux supports dl* functions
76 */
77 #define HAVE_DLL
78 #define USE_DLFCN
79 #if defined(ANDROID)
80 #define NO_DLOPEN_NULL
81 #endif
83 #if defined(__FreeBSD_kernel__) || defined(__GNU__)
84 #define _PR_HAVE_SOCKADDR_LEN
85 #endif
87 #if defined(__i386__)
88 #define _PR_HAVE_ATOMIC_OPS
89 #define _MD_INIT_ATOMIC()
90 extern PRInt32 _PR_x86_AtomicIncrement(PRInt32 *val);
91 #define _MD_ATOMIC_INCREMENT _PR_x86_AtomicIncrement
92 extern PRInt32 _PR_x86_AtomicDecrement(PRInt32 *val);
93 #define _MD_ATOMIC_DECREMENT _PR_x86_AtomicDecrement
94 extern PRInt32 _PR_x86_AtomicAdd(PRInt32 *ptr, PRInt32 val);
95 #define _MD_ATOMIC_ADD _PR_x86_AtomicAdd
96 extern PRInt32 _PR_x86_AtomicSet(PRInt32 *val, PRInt32 newval);
97 #define _MD_ATOMIC_SET _PR_x86_AtomicSet
98 #endif
100 #if defined(__ia64__)
101 #define _PR_HAVE_ATOMIC_OPS
102 #define _MD_INIT_ATOMIC()
103 extern PRInt32 _PR_ia64_AtomicIncrement(PRInt32 *val);
104 #define _MD_ATOMIC_INCREMENT _PR_ia64_AtomicIncrement
105 extern PRInt32 _PR_ia64_AtomicDecrement(PRInt32 *val);
106 #define _MD_ATOMIC_DECREMENT _PR_ia64_AtomicDecrement
107 extern PRInt32 _PR_ia64_AtomicAdd(PRInt32 *ptr, PRInt32 val);
108 #define _MD_ATOMIC_ADD _PR_ia64_AtomicAdd
109 extern PRInt32 _PR_ia64_AtomicSet(PRInt32 *val, PRInt32 newval);
110 #define _MD_ATOMIC_SET _PR_ia64_AtomicSet
111 #endif
113 #if defined(__x86_64__)
114 #define _PR_HAVE_ATOMIC_OPS
115 #define _MD_INIT_ATOMIC()
116 extern PRInt32 _PR_x86_64_AtomicIncrement(PRInt32 *val);
117 #define _MD_ATOMIC_INCREMENT _PR_x86_64_AtomicIncrement
118 extern PRInt32 _PR_x86_64_AtomicDecrement(PRInt32 *val);
119 #define _MD_ATOMIC_DECREMENT _PR_x86_64_AtomicDecrement
120 extern PRInt32 _PR_x86_64_AtomicAdd(PRInt32 *ptr, PRInt32 val);
121 #define _MD_ATOMIC_ADD _PR_x86_64_AtomicAdd
122 extern PRInt32 _PR_x86_64_AtomicSet(PRInt32 *val, PRInt32 newval);
123 #define _MD_ATOMIC_SET _PR_x86_64_AtomicSet
124 #endif
126 #if defined(__powerpc__) && !defined(__powerpc64__)
127 #define _PR_HAVE_ATOMIC_OPS
128 #define _MD_INIT_ATOMIC()
129 extern PRInt32 _PR_ppc_AtomicIncrement(PRInt32 *val);
130 #define _MD_ATOMIC_INCREMENT _PR_ppc_AtomicIncrement
131 extern PRInt32 _PR_ppc_AtomicDecrement(PRInt32 *val);
132 #define _MD_ATOMIC_DECREMENT _PR_ppc_AtomicDecrement
133 extern PRInt32 _PR_ppc_AtomicAdd(PRInt32 *ptr, PRInt32 val);
134 #define _MD_ATOMIC_ADD _PR_ppc_AtomicAdd
135 extern PRInt32 _PR_ppc_AtomicSet(PRInt32 *val, PRInt32 newval);
136 #define _MD_ATOMIC_SET _PR_ppc_AtomicSet
137 #endif
139 #if defined(__powerpc64__)
140 #if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)
141 /* Use GCC built-in functions */
142 #define _PR_HAVE_ATOMIC_OPS
143 #define _MD_INIT_ATOMIC()
144 #define _MD_ATOMIC_INCREMENT(ptr) __sync_add_and_fetch(ptr, 1)
145 #define _MD_ATOMIC_DECREMENT(ptr) __sync_sub_and_fetch(ptr, 1)
146 #define _MD_ATOMIC_ADD(ptr, i) __sync_add_and_fetch(ptr, i)
147 #define _MD_ATOMIC_SET(ptr, nv) __sync_lock_test_and_set(ptr, nv)
148 #endif
149 #endif
151 #if defined(__alpha)
152 #define _PR_HAVE_ATOMIC_OPS
153 #define _MD_INIT_ATOMIC()
154 #define _MD_ATOMIC_ADD(ptr, i) ({ \
155 PRInt32 __atomic_tmp, __atomic_ret; \
156 __asm__ __volatile__( \
157 "1: ldl_l %[ret], %[val] \n" \
158 " addl %[ret], %[inc], %[tmp] \n" \
159 " addl %[ret], %[inc], %[ret] \n" \
160 " stl_c %[tmp], %[val] \n" \
161 " beq %[tmp], 2f \n" \
162 ".subsection 2 \n" \
163 "2: br 1b \n" \
164 ".previous" \
165 : [ret] "=&r" (__atomic_ret), \
166 [tmp] "=&r" (__atomic_tmp), \
167 [val] "=m" (*ptr) \
168 : [inc] "Ir" (i), "m" (*ptr)); \
169 __atomic_ret; \
170 })
171 #define _MD_ATOMIC_INCREMENT(ptr) _MD_ATOMIC_ADD(ptr, 1)
172 #define _MD_ATOMIC_DECREMENT(ptr) ({ \
173 PRInt32 __atomic_tmp, __atomic_ret; \
174 __asm__ __volatile__( \
175 "1: ldl_l %[ret], %[val] \n" \
176 " subl %[ret], 1, %[tmp] \n" \
177 " subl %[ret], 1, %[ret] \n" \
178 " stl_c %[tmp], %[val] \n" \
179 " beq %[tmp], 2f \n" \
180 ".subsection 2 \n" \
181 "2: br 1b \n" \
182 ".previous" \
183 : [ret] "=&r" (__atomic_ret), \
184 [tmp] "=&r" (__atomic_tmp), \
185 [val] "=m" (*ptr) \
186 : "m" (*ptr)); \
187 __atomic_ret; \
188 })
189 #define _MD_ATOMIC_SET(ptr, n) ({ \
190 PRInt32 __atomic_tmp, __atomic_ret; \
191 __asm__ __volatile__( \
192 "1: ldl_l %[ret], %[val] \n" \
193 " mov %[newval], %[tmp] \n" \
194 " stl_c %[tmp], %[val] \n" \
195 " beq %[tmp], 2f \n" \
196 ".subsection 2 \n" \
197 "2: br 1b \n" \
198 ".previous" \
199 : [ret] "=&r" (__atomic_ret), \
200 [tmp] "=&r"(__atomic_tmp), \
201 [val] "=m" (*ptr) \
202 : [newval] "Ir" (n), "m" (*ptr)); \
203 __atomic_ret; \
204 })
205 #endif
207 #if defined(__arm__) || defined(__aarch64__)
208 #if defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4)
209 /* Use GCC built-in functions */
210 #define _PR_HAVE_ATOMIC_OPS
211 #define _MD_INIT_ATOMIC()
213 #define _MD_ATOMIC_INCREMENT(ptr) __sync_add_and_fetch(ptr, 1)
214 #define _MD_ATOMIC_DECREMENT(ptr) __sync_sub_and_fetch(ptr, 1)
215 #define _MD_ATOMIC_SET(ptr, nv) __sync_lock_test_and_set(ptr, nv)
216 #define _MD_ATOMIC_ADD(ptr, i) __sync_add_and_fetch(ptr, i)
218 #elif defined(_PR_ARM_KUSER)
219 #define _PR_HAVE_ATOMIC_OPS
220 #define _MD_INIT_ATOMIC()
222 /*
223 * The kernel provides this helper function at a fixed address with a fixed
224 * ABI signature, directly callable from user space.
225 *
226 * Definition:
227 * Atomically store newval in *ptr if *ptr is equal to oldval.
228 * Return zero if *ptr was changed or non-zero if no exchange happened.
229 */
230 typedef int (__kernel_cmpxchg_t)(int oldval, int newval, volatile int *ptr);
231 #define __kernel_cmpxchg (*(__kernel_cmpxchg_t *)0xffff0fc0)
233 #define _MD_ATOMIC_INCREMENT(ptr) _MD_ATOMIC_ADD(ptr, 1)
234 #define _MD_ATOMIC_DECREMENT(ptr) _MD_ATOMIC_ADD(ptr, -1)
236 static inline PRInt32 _MD_ATOMIC_ADD(PRInt32 *ptr, PRInt32 n)
237 {
238 PRInt32 ov, nv;
239 volatile PRInt32 *vp = ptr;
241 do {
242 ov = *vp;
243 nv = ov + n;
244 } while (__kernel_cmpxchg(ov, nv, vp));
246 return nv;
247 }
249 static inline PRInt32 _MD_ATOMIC_SET(PRInt32 *ptr, PRInt32 nv)
250 {
251 PRInt32 ov;
252 volatile PRInt32 *vp = ptr;
254 do {
255 ov = *vp;
256 } while (__kernel_cmpxchg(ov, nv, vp));
258 return ov;
259 }
260 #endif
261 #endif /* __arm__ */
263 #define USE_SETJMP
264 #if (defined(__GLIBC__) && __GLIBC__ >= 2) || defined(ANDROID)
265 #define _PR_POLL_AVAILABLE
266 #endif
267 #undef _PR_USE_POLL
268 #define _PR_STAT_HAS_ONLY_ST_ATIME
269 #if defined(__alpha) || defined(__ia64__)
270 #define _PR_HAVE_LARGE_OFF_T
271 #elif (__GLIBC__ > 2) || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1) \
272 || defined(ANDROID)
273 #define _PR_HAVE_OFF64_T
274 #else
275 #define _PR_NO_LARGE_FILES
276 #endif
277 #if (__GLIBC__ > 2) || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1) \
278 || defined(ANDROID)
279 #define _PR_INET6
280 #define _PR_HAVE_INET_NTOP
281 #define _PR_HAVE_GETHOSTBYNAME2
282 #define _PR_HAVE_GETADDRINFO
283 #define _PR_INET6_PROBE
284 #endif
285 #ifndef ANDROID
286 #define _PR_HAVE_SYSV_SEMAPHORES
287 #define PR_HAVE_SYSV_NAMED_SHARED_MEMORY
288 #endif
289 /* Android has gethostbyname_r but not gethostbyaddr_r or gethostbyname2_r. */
290 #if (__GLIBC__ >= 2) && defined(_PR_PTHREADS)
291 #define _PR_HAVE_GETHOST_R
292 #define _PR_HAVE_GETHOST_R_INT
293 #endif
295 #ifdef _PR_PTHREADS
297 extern void _MD_CleanupBeforeExit(void);
298 #define _MD_CLEANUP_BEFORE_EXIT _MD_CleanupBeforeExit
300 #else /* ! _PR_PTHREADS */
302 #include <setjmp.h>
304 #define PR_CONTEXT_TYPE sigjmp_buf
306 #define CONTEXT(_th) ((_th)->md.context)
308 #ifdef __powerpc__
309 /*
310 * PowerPC based MkLinux
311 *
312 * On the PowerPC, the new style jmp_buf isn't used until glibc
313 * 2.1.
314 */
315 #if (__GLIBC__ > 2) || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1)
316 #define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[JB_GPR1]
317 #else
318 #define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__misc[0]
319 #endif /* glibc 2.1 or later */
320 #define _MD_SET_FP(_t, val)
321 #define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
322 #define _MD_GET_FP_PTR(_t) ((void *) 0)
323 /* aix = 64, macos = 70 */
324 #define PR_NUM_GCREGS 64
326 #elif defined(__alpha)
327 /* Alpha based Linux */
329 #if defined(__GLIBC__) && __GLIBC__ >= 2
330 #define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[JB_SP]
331 #define _MD_SET_FP(_t, val)
332 #define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
333 #define _MD_GET_FP_PTR(_t) ((void *) 0)
334 #define _MD_SP_TYPE long int
335 #else
336 #define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__sp
337 #define _MD_SET_FP(_t, val)
338 #define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
339 #define _MD_GET_FP_PTR(_t) ((void *) 0)
340 #define _MD_SP_TYPE __ptr_t
341 #endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
343 /* XXX not sure if this is correct, or maybe it should be 17? */
344 #define PR_NUM_GCREGS 9
346 #elif defined(__ia64__)
348 #define _MD_GET_SP(_t) ((long *)((_t)->md.context[0].__jmpbuf)[0])
349 #define _MD_SET_FP(_t, val)
350 #define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
351 #define _MD_GET_FP_PTR(_t) ((void *) 0)
352 #define _MD_SP_TYPE long int
354 #define PR_NUM_GCREGS _JBLEN
356 #elif defined(__mc68000__)
357 /* m68k based Linux */
359 /*
360 * On the m68k, glibc still uses the old style sigjmp_buf, even
361 * in glibc 2.0.7.
362 */
363 #if defined(__GLIBC__) && __GLIBC__ >= 2
364 #define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__sp
365 #define _MD_SET_FP(_t, val)
366 #define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
367 #define _MD_GET_FP_PTR(_t) ((void *) 0)
368 #define _MD_SP_TYPE int
369 #else
370 #define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__sp
371 #define _MD_SET_FP(_t, val)
372 #define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
373 #define _MD_GET_FP_PTR(_t) ((void *) 0)
374 #define _MD_SP_TYPE __ptr_t
375 #endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
377 /* XXX not sure if this is correct, or maybe it should be 17? */
378 #define PR_NUM_GCREGS 9
380 #elif defined(__sparc__)
381 /* Sparc */
382 #if defined(__GLIBC__) && __GLIBC__ >= 2
383 /*
384 * You need glibc2-2.0.7-25 or later. The libraries that came with
385 * Red Hat 5.1 are not new enough, but they are in 5.2.
386 */
387 #define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[JB_SP]
388 #define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[JB_FP] = val)
389 #define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
390 #define _MD_GET_FP_PTR(_t) (&(_t)->md.context[0].__jmpbuf[JB_FP])
391 #define _MD_SP_TYPE int
392 #else
393 #define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__fp
394 #define _MD_SET_FP(_t, val)
395 #define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
396 #define _MD_GET_FP_PTR(_t) ((void *) 0)
397 #define _MD_SP_TYPE __ptr_t
398 #endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
400 #elif defined(__i386__)
401 /* Intel based Linux */
402 #if defined(__GLIBC__) && __GLIBC__ >= 2
403 #define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[JB_SP]
404 #define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[JB_BP] = val)
405 #define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
406 #define _MD_GET_FP_PTR(_t) (&(_t)->md.context[0].__jmpbuf[JB_BP])
407 #define _MD_SP_TYPE int
408 #else
409 #define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__sp
410 #define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[0].__bp = val)
411 #define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
412 #define _MD_GET_FP_PTR(_t) &((_t)->md.context[0].__jmpbuf[0].__bp)
413 #define _MD_SP_TYPE __ptr_t
414 #endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
415 #define PR_NUM_GCREGS 6
417 #elif defined(__mips__)
418 /* Linux/MIPS */
419 #if defined(__GLIBC__) && __GLIBC__ >= 2
420 #define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__sp
421 #define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[0].__fp = (val))
422 #define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
423 #define _MD_GET_FP_PTR(_t) (&(_t)->md.context[0].__jmpbuf[0].__fp)
424 #define _MD_SP_TYPE __ptr_t
425 #else
426 #error "Linux/MIPS pre-glibc2 not supported yet"
427 #endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
429 #elif defined(__arm__)
430 /* ARM/Linux */
431 #if defined(__GLIBC__) && __GLIBC__ >= 2
432 #ifdef __ARM_EABI__
433 /* EABI */
434 #define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[8]
435 #define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[7] = (val))
436 #define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
437 #define _MD_GET_FP_PTR(_t) (&(_t)->md.context[0].__jmpbuf[7])
438 #define _MD_SP_TYPE __ptr_t
439 #else /* __ARM_EABI__ */
440 /* old ABI */
441 #define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[20]
442 #define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[19] = (val))
443 #define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
444 #define _MD_GET_FP_PTR(_t) (&(_t)->md.context[0].__jmpbuf[19])
445 #define _MD_SP_TYPE __ptr_t
446 #endif /* __ARM_EABI__ */
447 #else
448 #error "ARM/Linux pre-glibc2 not supported yet"
449 #endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
451 #elif defined(__sh__)
452 /* SH/Linux */
453 #if defined(__GLIBC__) && __GLIBC__ >= 2
454 #define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[7]
455 #define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[6] = (val))
456 #define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
457 #define _MD_GET_FP_PTR(_t) (&(_t)->md.context[0].__jmpbuf[6])
458 #define _MD_SP_TYPE __ptr_t
459 #else
460 #error "SH/Linux pre-glibc2 not supported yet"
461 #endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
463 #elif defined(__m32r__)
464 /* Linux/M32R */
465 #if defined(__GLIBC__) && __GLIBC__ >= 2
466 #define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[0].__regs[JB_SP]
467 #define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[0].__regs[JB_FP] = (val))
468 #define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
469 #define _MD_GET_FP_PTR(_t) (&(_t)->md.context[0].__jmpbuf[0].__regs[JB_FP])
470 #define _MD_SP_TYPE __ptr_t
471 #else
472 #error "Linux/M32R pre-glibc2 not supported yet"
473 #endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
475 #else
477 #error "Unknown CPU architecture"
479 #endif /*__powerpc__*/
481 /*
482 ** Initialize a thread context to run "_main()" when started
483 */
484 #ifdef __powerpc__
486 #define _MD_INIT_CONTEXT(_thread, _sp, _main, status) \
487 { \
488 *status = PR_TRUE; \
489 if (sigsetjmp(CONTEXT(_thread), 1)) { \
490 _main(); \
491 } \
492 _MD_GET_SP(_thread) = (unsigned char*) ((_sp) - 128); \
493 _thread->md.sp = _MD_GET_SP_PTR(_thread); \
494 _thread->md.fp = _MD_GET_FP_PTR(_thread); \
495 _MD_SET_FP(_thread, 0); \
496 }
498 #elif defined(__mips__)
500 #define _MD_INIT_CONTEXT(_thread, _sp, _main, status) \
501 { \
502 *status = PR_TRUE; \
503 (void) sigsetjmp(CONTEXT(_thread), 1); \
504 _thread->md.context[0].__jmpbuf[0].__pc = (__ptr_t) _main; \
505 _MD_GET_SP(_thread) = (_MD_SP_TYPE) ((_sp) - 64); \
506 _thread->md.sp = _MD_GET_SP_PTR(_thread); \
507 _thread->md.fp = _MD_GET_FP_PTR(_thread); \
508 _MD_SET_FP(_thread, 0); \
509 }
511 #else
513 #define _MD_INIT_CONTEXT(_thread, _sp, _main, status) \
514 { \
515 *status = PR_TRUE; \
516 if (sigsetjmp(CONTEXT(_thread), 1)) { \
517 _main(); \
518 } \
519 _MD_GET_SP(_thread) = (_MD_SP_TYPE) ((_sp) - 64); \
520 _thread->md.sp = _MD_GET_SP_PTR(_thread); \
521 _thread->md.fp = _MD_GET_FP_PTR(_thread); \
522 _MD_SET_FP(_thread, 0); \
523 }
525 #endif /*__powerpc__*/
527 #define _MD_SWITCH_CONTEXT(_thread) \
528 if (!sigsetjmp(CONTEXT(_thread), 1)) { \
529 (_thread)->md.errcode = errno; \
530 _PR_Schedule(); \
531 }
533 /*
534 ** Restore a thread context, saved by _MD_SWITCH_CONTEXT
535 */
536 #define _MD_RESTORE_CONTEXT(_thread) \
537 { \
538 errno = (_thread)->md.errcode; \
539 _MD_SET_CURRENT_THREAD(_thread); \
540 siglongjmp(CONTEXT(_thread), 1); \
541 }
543 /* Machine-dependent (MD) data structures */
545 struct _MDThread {
546 PR_CONTEXT_TYPE context;
547 void *sp;
548 void *fp;
549 int id;
550 int errcode;
551 };
553 struct _MDThreadStack {
554 PRInt8 notused;
555 };
557 struct _MDLock {
558 PRInt8 notused;
559 };
561 struct _MDSemaphore {
562 PRInt8 notused;
563 };
565 struct _MDCVar {
566 PRInt8 notused;
567 };
569 struct _MDSegment {
570 PRInt8 notused;
571 };
573 /*
574 * md-specific cpu structure field
575 */
576 #include <sys/time.h> /* for FD_SETSIZE */
577 #define _PR_MD_MAX_OSFD FD_SETSIZE
579 struct _MDCPU_Unix {
580 PRCList ioQ;
581 PRUint32 ioq_timeout;
582 PRInt32 ioq_max_osfd;
583 PRInt32 ioq_osfd_cnt;
584 #ifndef _PR_USE_POLL
585 fd_set fd_read_set, fd_write_set, fd_exception_set;
586 PRInt16 fd_read_cnt[_PR_MD_MAX_OSFD],fd_write_cnt[_PR_MD_MAX_OSFD],
587 fd_exception_cnt[_PR_MD_MAX_OSFD];
588 #else
589 struct pollfd *ioq_pollfds;
590 int ioq_pollfds_size;
591 #endif /* _PR_USE_POLL */
592 };
594 #define _PR_IOQ(_cpu) ((_cpu)->md.md_unix.ioQ)
595 #define _PR_ADD_TO_IOQ(_pq, _cpu) PR_APPEND_LINK(&_pq.links, &_PR_IOQ(_cpu))
596 #define _PR_FD_READ_SET(_cpu) ((_cpu)->md.md_unix.fd_read_set)
597 #define _PR_FD_READ_CNT(_cpu) ((_cpu)->md.md_unix.fd_read_cnt)
598 #define _PR_FD_WRITE_SET(_cpu) ((_cpu)->md.md_unix.fd_write_set)
599 #define _PR_FD_WRITE_CNT(_cpu) ((_cpu)->md.md_unix.fd_write_cnt)
600 #define _PR_FD_EXCEPTION_SET(_cpu) ((_cpu)->md.md_unix.fd_exception_set)
601 #define _PR_FD_EXCEPTION_CNT(_cpu) ((_cpu)->md.md_unix.fd_exception_cnt)
602 #define _PR_IOQ_TIMEOUT(_cpu) ((_cpu)->md.md_unix.ioq_timeout)
603 #define _PR_IOQ_MAX_OSFD(_cpu) ((_cpu)->md.md_unix.ioq_max_osfd)
604 #define _PR_IOQ_OSFD_CNT(_cpu) ((_cpu)->md.md_unix.ioq_osfd_cnt)
605 #define _PR_IOQ_POLLFDS(_cpu) ((_cpu)->md.md_unix.ioq_pollfds)
606 #define _PR_IOQ_POLLFDS_SIZE(_cpu) ((_cpu)->md.md_unix.ioq_pollfds_size)
608 #define _PR_IOQ_MIN_POLLFDS_SIZE(_cpu) 32
610 struct _MDCPU {
611 struct _MDCPU_Unix md_unix;
612 };
614 #define _MD_INIT_LOCKS()
615 #define _MD_NEW_LOCK(lock) PR_SUCCESS
616 #define _MD_FREE_LOCK(lock)
617 #define _MD_LOCK(lock)
618 #define _MD_UNLOCK(lock)
619 #define _MD_INIT_IO()
620 #define _MD_IOQ_LOCK()
621 #define _MD_IOQ_UNLOCK()
623 extern PRStatus _MD_InitializeThread(PRThread *thread);
625 #define _MD_INIT_RUNNING_CPU(cpu) _MD_unix_init_running_cpu(cpu)
626 #define _MD_INIT_THREAD _MD_InitializeThread
627 #define _MD_EXIT_THREAD(thread)
628 #define _MD_SUSPEND_THREAD(thread) _MD_suspend_thread
629 #define _MD_RESUME_THREAD(thread) _MD_resume_thread
630 #define _MD_CLEAN_THREAD(_thread)
632 extern PRStatus _MD_CREATE_THREAD(
633 PRThread *thread,
634 void (*start) (void *),
635 PRThreadPriority priority,
636 PRThreadScope scope,
637 PRThreadState state,
638 PRUint32 stackSize);
639 extern void _MD_SET_PRIORITY(struct _MDThread *thread, PRUintn newPri);
640 extern PRStatus _MD_WAIT(PRThread *, PRIntervalTime timeout);
641 extern PRStatus _MD_WAKEUP_WAITER(PRThread *);
642 extern void _MD_YIELD(void);
644 #endif /* ! _PR_PTHREADS */
646 extern void _MD_EarlyInit(void);
648 #define _MD_EARLY_INIT _MD_EarlyInit
649 #define _MD_FINAL_INIT _PR_UnixInit
650 #define HAVE_CLOCK_MONOTONIC
652 /*
653 * We wrapped the select() call. _MD_SELECT refers to the built-in,
654 * unwrapped version.
655 */
656 #define _MD_SELECT __select
658 #ifdef _PR_POLL_AVAILABLE
659 #include <sys/poll.h>
660 extern int __syscall_poll(struct pollfd *ufds, unsigned long int nfds,
661 int timeout);
662 #define _MD_POLL __syscall_poll
663 #endif
665 /* For writev() */
666 #include <sys/uio.h>
668 extern void _MD_linux_map_sendfile_error(int err);
670 #endif /* nspr_linux_defs_h___ */
