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