2 * This software is part of the SBCL system. See the README file for
5 * This software is derived from the CMU CL system, which was
6 * written at Carnegie Mellon University and released into the
7 * public domain. The software is in the public domain and is
8 * provided with absolutely no warranty. See the COPYING and CREDITS
9 * files for more information.
13 #include <osreldate.h>
16 #include <sys/types.h>
18 #include <sys/signal.h>
20 #ifdef LISP_FEATURE_DARWIN
21 #include <mach/mach_types.h>
24 typedef caddr_t os_vm_address_t;
25 #if defined __NetBSD__
26 typedef vsize_t os_vm_size_t;
27 #elif defined __OpenBSD__
28 typedef size_t os_vm_size_t;
30 typedef vm_size_t os_vm_size_t;
32 typedef off_t os_vm_offset_t;
33 typedef int os_vm_prot_t;
34 typedef int os_context_register_t;
36 #if defined __OpenBSD__
37 /* name defined for compatibility between OpenBSD 3.1 sigaltstack(2) and
38 * Linux sigaltstack(2) */
39 typedef struct sigaltstack stack_t;
40 #elif defined __FreeBSD__
41 /* FreeBSD 4.6 and NetBSD 1.6 already have stack_t defined. */
44 #if defined __FreeBSD__
45 /* Note: The man page for sigaction(2) in FreeBSD 4.0 says that this
46 * is an mcontext_t, but according to comments by Raymond Wiker in the
47 * original FreeBSD port of SBCL, that's wrong, it's actually a
50 #include <sys/ucontext.h>
51 typedef ucontext_t os_context_t;
52 /* As the sbcl-devel message from Raymond Wiker 2000-12-01, FreeBSD
53 * (unlike Linux and OpenBSD) doesn't let us tweak the CPU's single
54 * step flag bit by messing with the flags stored in a signal context,
55 * so we need to implement single stepping in a more roundabout way. */
56 #define CANNOT_GET_TO_SINGLE_STEP_FLAG
57 #define SIG_MEMORY_FAULT SIGSEGV
58 /* Sometime in late 2005 FreeBSD was changed to signal SIGSEGV instead
59 * of SIGBUS for memory faults, as required by POSIX. In order to
60 * support both new and old FreeBSD at the same time, both signals are
61 * hooked to the GC write barrier machinery. If you're reading this
62 * message in the far future where FreeBSD 6 and earlier are just
63 * quaint memories, feel free to delete this hack (and any code that's
64 * #ifdef SIG_MEMORY_FAULT2'ed). -- JES, 2005-12-30
66 #define SIG_MEMORY_FAULT2 SIGBUS
68 #elif defined __OpenBSD__
70 typedef struct sigcontext os_context_t;
71 #define SIG_MEMORY_FAULT SIGSEGV
73 #elif defined __NetBSD__
76 typedef ucontext_t os_context_t;
77 #define SIG_MEMORY_FAULT SIGSEGV
79 #elif defined LISP_FEATURE_DARWIN
80 /* man pages claim that the third argument is a sigcontext struct,
81 but ucontext_t is defined, matches sigcontext where sensible,
82 offers better access to mcontext, and is of course the SUSv2-
83 mandated type of the third argument, so we use that instead.
84 If Apple is going to break ucontext_t out of spite, I'm going
85 to be cross with them ;) -- PRM */
87 #if defined(LISP_FEATURE_X86)
88 #include <sys/ucontext.h>
89 #include <sys/_types.h>
90 typedef struct ucontext os_context_t;
93 typedef ucontext_t os_context_t;
96 #define SIG_MEMORY_FAULT SIGBUS
99 #error unsupported BSD variant
102 #include "target-arch-os.h"
103 #include "target-arch.h"
105 #define OS_VM_PROT_READ PROT_READ
106 #define OS_VM_PROT_WRITE PROT_WRITE
107 #define OS_VM_PROT_EXECUTE PROT_EXEC