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 #ifdef __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 typedef caddr_t os_vm_address_t;
  21 typedef vm_size_t os_vm_size_t;
  22 typedef off_t os_vm_offset_t;
  23 typedef int os_vm_prot_t;
  24 typedef int os_context_register_t;
  25
  26 #if defined __OpenBSD__
  27 /* name defined for compatibility between OpenBSD 3.1 sigaltstack(2) and
  28  * Linux sigaltstack(2) */
  29 typedef struct sigaltstack stack_t;
  30 #elif defined __FreeBSD__
  31 /* FreeBSD 4.6 already has stack_t defined. */
  32 #endif
  33
  34 #if defined __FreeBSD__
  35 /* Note: The man page for sigaction(2) in FreeBSD 4.0 says that this
  36  * is an mcontext_t, but according to comments by Raymond Wiker in the
  37  * original FreeBSD port of SBCL, that's wrong, it's actually a
  38  * ucontext_t. */
  39
  40 #include <sys/ucontext.h>
  41 typedef ucontext_t os_context_t;
  42 /* As the sbcl-devel message from Raymond Wiker 2000-12-01, FreeBSD
  43  * (unlike Linux and OpenBSD) doesn't let us tweak the CPU's single
  44  * step flag bit by messing with the flags stored in a signal context,
  45  * so we need to implement single stepping in a more roundabout way. */
  46 #define CANNOT_GET_TO_SINGLE_STEP_FLAG
  47 #define SIG_MEMORY_FAULT SIGBUS
  48 #elif defined __OpenBSD__
  49 typedef struct sigcontext os_context_t;
  50 #define SIG_MEMORY_FAULT SIGSEGV
  51 #elif defined DARWIN
  52   /* man pages claim that the third argument is a sigcontext struct,
  53      but ucontext_t is defined, matches sigcontext where sensible,
  54      offers better access to mcontext, and is of course the SUSv2-
  55      mandated type of the third argument, so we use that instead.
  56      If Apple is going to break ucontext_t out of spite, I'm going
  57      to be cross with them ;) -- PRM */
  58
  59 #include <ucontext.h>
  60 typedef ucontext_t os_context_t;
  61 #define SIG_MEMORY_FAULT SIGBUS
  62 #else
  63 #error unsupported BSD variant
  64 #endif
  65
  66 #include "target-arch-os.h"
  67 #include "target-arch.h"
  68
  69 #define OS_VM_PROT_READ PROT_READ
  70 #define OS_VM_PROT_WRITE PROT_WRITE
  71 #define OS_VM_PROT_EXECUTE PROT_EXEC