2 * OS-dependent routines for BSD-ish systems
4 * This file (along with os.h) exports an OS-independent interface to
5 * the operating system VM facilities. This interface looks a lot like
6 * the Mach interface (but simpler in some places). For some operating
7 * systems, a subset of these functions will have to be emulated.
11 * This software is part of the SBCL system. See the README file for
14 * This software is derived from the CMU CL system, which was
15 * written at Carnegie Mellon University and released into the
16 * public domain. The software is in the public domain and is
17 * provided with absolutely no warranty. See the COPYING and CREDITS
18 * files for more information.
22 #include <sys/param.h>
28 #include "interrupt.h"
32 #include <sys/types.h>
34 /* #include <sys/sysinfo.h> */
37 vm_size_t os_vm_page_size;
43 /* The different BSD variants have diverged in exactly where they
44 * store signal context information, but at least they tend to use the
45 * same stems to name the structure fields, so by using this macro we
46 * can share a fair amount of code between different variants. */
47 #if defined __FreeBSD__
48 #define CONTEXT_ADDR_FROM_STEM(stem) &context->uc_mcontext.mc_ ## stem
49 #elif defined __OpenBSD__
50 #define CONTEXT_ADDR_FROM_STEM(stem) &context->sc_ ## stem
52 #error unsupported BSD variant
58 os_vm_page_size = getpagesize();
61 /* KLUDGE: There is strong family resemblance in the signal context
62 * stuff in FreeBSD and OpenBSD, but in detail they're different in
63 * almost every line of code. It would be nice to find some way to
64 * factor out the commonality better; failing that, it might be best
65 * just to split this generic-BSD code into one variant for each BSD. */
68 os_context_register_addr(os_context_t *context, int offset)
72 return CONTEXT_ADDR_FROM_STEM(eax);
74 return CONTEXT_ADDR_FROM_STEM(ecx);
76 return CONTEXT_ADDR_FROM_STEM(edx);
78 return CONTEXT_ADDR_FROM_STEM(ebx);
80 return CONTEXT_ADDR_FROM_STEM(esp);
82 return CONTEXT_ADDR_FROM_STEM(ebp);
84 return CONTEXT_ADDR_FROM_STEM(esi);
86 return CONTEXT_ADDR_FROM_STEM(edi);
93 os_context_pc_addr(os_context_t *context)
95 #if defined __FreeBSD__
96 return CONTEXT_ADDR_FROM_STEM(eip);
97 #elif defined __OpenBSD__
98 return CONTEXT_ADDR_FROM_STEM(pc);
100 #error unsupported BSD variant
105 os_context_sp_addr(os_context_t *context)
107 return CONTEXT_ADDR_FROM_STEM(esp);
111 os_context_sigmask_addr(os_context_t *context)
113 /* (Unlike most of the other context fields that we access, the
114 * signal mask field is a field of the basic, outermost context
115 * struct itself both in FreeBSD 4.0 and in OpenBSD 2.6.) */
116 #if defined __FreeBSD__
117 return &context->uc_sigmask;
118 #elif defined __OpenBSD__
119 return &context->sc_mask;
121 #error unsupported BSD variant
126 os_validate(os_vm_address_t addr, os_vm_size_t len)
128 int flags = MAP_PRIVATE | MAP_ANON;
133 addr = mmap(addr, len, OS_VM_PROT_ALL, flags, -1, 0);
135 if (addr == MAP_FAILED) {
144 os_invalidate(os_vm_address_t addr, os_vm_size_t len)
146 if (munmap(addr, len) == -1)
151 os_map(int fd, int offset, os_vm_address_t addr, os_vm_size_t len)
153 addr = mmap(addr, len,
155 MAP_PRIVATE | MAP_FILE | MAP_FIXED,
158 if (addr == MAP_FAILED) {
160 lose("unexpected mmap(..) failure");
167 os_flush_icache(os_vm_address_t address, os_vm_size_t length)
172 os_protect(os_vm_address_t address, os_vm_size_t length, os_vm_prot_t prot)
174 if (mprotect(address, length, prot) == -1) {
180 in_range_p(os_vm_address_t a, lispobj sbeg, size_t slen)
182 char* beg = (char*) sbeg;
183 char* end = (char*) sbeg + slen;
184 char* adr = (char*) a;
185 return (adr >= beg && adr < end);
189 is_valid_lisp_addr(os_vm_address_t addr)
191 return in_range_p(addr, READ_ONLY_SPACE_START, READ_ONLY_SPACE_SIZE)
192 || in_range_p(addr, STATIC_SPACE_START , STATIC_SPACE_SIZE )
193 || in_range_p(addr, DYNAMIC_SPACE_START , DYNAMIC_SPACE_SIZE )
194 || in_range_p(addr, CONTROL_STACK_START , CONTROL_STACK_SIZE )
195 || in_range_p(addr, BINDING_STACK_START , BINDING_STACK_SIZE );
199 * any OS-dependent special low-level handling for signals
205 os_install_interrupt_handlers(void)
211 * The GENCGC needs to be hooked into whatever signal is raised for
212 * page fault on this OS.
215 memory_fault_handler(int signal, siginfo_t *siginfo, void *void_context)
217 /* The way that we extract low level information like the fault
218 * address is not specified by POSIX. */
219 #if defined __FreeBSD__
220 void *fault_addr = siginfo->si_addr;
221 #elif defined __OpenBSD__
222 void *fault_addr = siginfo->si_addr;
224 #error unsupported BSD variant
226 if (!gencgc_handle_wp_violation(fault_addr)) {
227 interrupt_handle_now(signal, siginfo, void_context);
231 os_install_interrupt_handlers(void)
233 #if defined __FreeBSD__
234 interrupt_install_low_level_handler(SIGBUS, memory_fault_handler);
235 #elif defined __OpenBSD__
236 interrupt_install_low_level_handler(SIGSEGV, memory_fault_handler);
238 #error unsupported BSD variant
242 #endif /* !defined GENCGC */
245 * stuff to help work with dynamically linked libraries
250 * DL_WORKAROUND enables "stubbing" of various functions from libc et
251 * al. This is necessary when using dynamic linking in FreeBSD, as the
252 * symbols in the dynamic libraries will not have known addresses (in
255 * FIXME: This flag should be set in Config.bsd */
256 #if defined __FreeBSD__
257 #define DL_WORKAROUND 1
258 #elif defined __OpenBSD__
259 /* SBCL doesn't (yet?) work at all with dynamic libs on OpenBSD, so we
260 * wouldn't get any use out of these stubs. -- WHN 20001001 */
261 #define DL_WORKAROUND 0
263 #error unsupported BSD variant
270 #include <sys/types.h>
273 #include <sys/stat.h>
275 #include <sys/resource.h>
279 void *ldso_stub__dlopen(const char *path, int mode)
281 return dlopen(path, mode);
284 void *ldso_stub__dlsym(void *handle, const char *symbol)
286 return dlsym(handle, symbol);
289 const char *ldso_stub__dlerror(void)
293 int ldso_stub__access(const char *path, int mode)
295 return access(path, mode);
298 double ldso_stub__acos(double x)
303 double ldso_stub__acosh(double x)
308 double ldso_stub__asin(double x)
313 double ldso_stub__asinh(double x)
318 double ldso_stub__atanh(double x)
324 int ldso_stub__chdir(const char *path)
329 int ldso_stub__close(int d)
334 int ldso_stub__closedir(DIR *dirp)
336 return closedir(dirp);
339 double ldso_stub__cosh(double x)
344 void ldso_stub__exit(int status)
349 void ldso_stub__free(void *ptr)
354 int ldso_stub__fstat(int fd, struct stat *sb)
356 return fstat(fd, sb);
359 int ldso_stub__fsync(int fd)
364 char *ldso_stub__getenv(const char *name)
369 int ldso_stub__gethostname(char *name, int namelen)
371 return gethostname(name, namelen);
374 pid_t ldso_stub__getpid(void)
379 int ldso_stub__getrusage(int who, struct rusage *rusage)
381 return getrusage(who, rusage);
384 int ldso_stub__gettimeofday(struct timeval *tp, struct timezone *tzp)
386 return gettimeofday(tp, tzp);
389 uid_t ldso_stub__getuid(void)
394 char *ldso_stub__getwd(char *buf)
399 double ldso_stub__hypot(double x, double y)
404 int ldso_stub__kill(pid_t pid, int sig)
406 return kill(pid, sig);
409 int ldso_stub__killpg(pid_t pgrp, int sig)
411 return killpg(pgrp, sig);
414 off_t ldso_stub__lseek(int fildes, off_t offset, int whence)
416 return lseek(fildes, offset, whence);
419 int ldso_stub__lstat(const char *path, struct stat *sb)
421 return lstat(path, sb);
424 void *ldso_stub__malloc(size_t size)
429 int ldso_stub__mkdir(const char *path, mode_t mode)
431 return mkdir(path, mode);
434 int ldso_stub__open(const char *path, int flags, mode_t mode)
436 return open(path, flags, mode);
439 DIR *ldso_stub__opendir(const char *filename)
441 return opendir(filename);
444 double ldso_stub__pow(double x, double y)
449 ssize_t ldso_stub__read(int d, void *buf, size_t nbytes)
451 return read(d, buf, nbytes);
454 struct dirent *ldso_stub__readdir(DIR *dirp)
456 return readdir(dirp);
459 int ldso_stub__readlink(const char *path, char *buf, int bufsiz)
461 return readlink(path, buf, bufsiz);
464 int ldso_stub__rename(const char *from, const char *to)
466 return rename(from, to);
469 int ldso_stub__select(int nfds, fd_set *readfs, fd_set *writefds,
470 fd_set *exceptfds, struct timeval *timeout)
472 return select(nfds, readfs, writefds, exceptfds, timeout);
475 int ldso_stub__sigblock(int mask)
477 return sigblock(mask);
480 int ldso_stub__sigpause(int sigmask)
482 return sigpause(sigmask);
485 int ldso_stub__sigsetmask(int mask)
487 return sigsetmask(mask);
490 double ldso_stub__sinh(double x)
495 int ldso_stub__stat(const char *path, struct stat *sb)
497 return stat(path, sb);
500 double ldso_stub__tanh(double x)
507 int ldso_stub__unlink(const char *path)
512 ssize_t ldso_stub__write(int d, const void *buf, size_t nbytes)
514 return write(d, buf, nbytes);
517 pid_t ldso_stub__wait3(int *status, int options, struct rusage *rusage)
519 return wait3(status, options, rusage);
522 #endif /* DL_WORKAROUND */