src/runtime/bsd-os.h

   1 /*
   2  * This software is part of the SBCL system. See the README file for
   3  * more information.
   4  *
   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.
  10  */
  11
  12 #if defined(LISP_FEATURE_FREEBSD)
  13 #include <osreldate.h>
  14 #endif
  15
  16 #include <sys/types.h>
  17 #include <sys/mman.h>
  18 #include <sys/signal.h>
  19
  20 #ifdef LISP_FEATURE_DARWIN
  21 #include <mach/mach_types.h>
  22 #endif
  23
  24 typedef caddr_t os_vm_address_t;
  25 #if defined __NetBSD__ || defined __OpenBSD__
  26 typedef size_t os_vm_size_t;
  27 #else
  28 typedef vm_size_t os_vm_size_t;
  29 #endif
  30 typedef off_t os_vm_offset_t;
  31 typedef int os_vm_prot_t;
  32
  33 #if defined(LISP_FEATURE_FREEBSD)
  34 /* Note: The man page for sigaction(2) in FreeBSD 4.0 says that this
  35  * is an mcontext_t, but according to comments by Raymond Wiker in the
  36  * original FreeBSD port of SBCL, that's wrong, it's actually a
  37  * ucontext_t. */
  38
  39 #include <sys/ucontext.h>
  40 typedef ucontext_t os_context_t;
  41 /* As the sbcl-devel message from Raymond Wiker 2000-12-01, FreeBSD
  42  * (unlike Linux and OpenBSD) doesn't let us tweak the CPU's single
  43  * step flag bit by messing with the flags stored in a signal context,
  44  * so we need to implement single stepping in a more roundabout way. */
  45 #define CANNOT_GET_TO_SINGLE_STEP_FLAG
  46 /* Sometime in late 2005 FreeBSD was changed to signal SIGSEGV instead
  47  * of SIGBUS for memory faults, as required by POSIX. In order to
  48  * support both new and old FreeBSD at the same time, both signals are
  49  * hooked to the GC write barrier machinery. If you're reading this
  50  * message in the far future where FreeBSD 6 and earlier are just
  51  * quaint memories, feel free to delete this hack (and any code that's
  52  * #ifdef SIG_MEMORY_FAULT2'ed). -- JES, 2005-12-30
  53  */
  54 /* Hooking both SIGBUS and SIGSEGV causes troubles on some situation,
  55  * so use a variable.
  56  */
  57 extern int sig_memory_fault;
  58 #define SIG_MEMORY_FAULT (sig_memory_fault)
  59
  60 #define SIG_STOP_FOR_GC (SIGUSR2)
  61
  62 #elif defined __DragonFly__
  63
  64 #include <sys/ucontext.h>
  65 typedef ucontext_t os_context_t;
  66
  67 #define SIG_MEMORY_FAULT (SIGSEGV)
  68 #define SIG_STOP_FOR_GC (SIGUSR2)
  69
  70 #elif defined __OpenBSD__
  71
  72 typedef struct sigcontext os_context_t;
  73 #define SIG_MEMORY_FAULT SIGSEGV
  74 #define SIG_STOP_FOR_GC (SIGUSR2)
  75 #if defined(LISP_FEATURE_X86)
  76 extern int openbsd_use_fxsave;
  77 #endif
  78
  79 #elif defined __NetBSD__
  80
  81 #include <ucontext.h>
  82 typedef ucontext_t os_context_t;
  83 #define SIG_MEMORY_FAULT SIGSEGV
  84
  85 #define SIG_STOP_FOR_GC (SIGUSR2)
  86
  87 #elif defined LISP_FEATURE_DARWIN
  88 #include "darwin-os.h"
  89 #else
  90 #error unsupported BSD variant
  91 #endif
  92
  93 #include "target-arch-os.h"
  94 #include "target-arch.h"
  95
  96 #define OS_VM_PROT_READ PROT_READ
  97 #define OS_VM_PROT_WRITE PROT_WRITE
  98 #define OS_VM_PROT_EXECUTE PROT_EXEC