src/runtime/x86-bsd-os.h

   1 #ifndef _X86_BSD_OS_H
   2 #define _X86_BSD_OS_H
   3
   4 #ifdef LISP_FEATURE_FREEBSD
   5 #include <machine/segments.h>
   6 #include <machine/cpufunc.h>
   7 #endif
   8
   9 typedef int os_context_register_t;
  10
  11 static inline os_context_t *arch_os_get_context(void **void_context)
  12 {
  13     return (os_context_t *) *void_context;
  14 }
  15
  16 /* The different BSD variants have diverged in exactly where they
  17  * store signal context information, but at least they tend to use the
  18  * same stems to name the structure fields, so by using this macro we
  19  * can share a fair amount of code between different variants. */
  20 #if defined(LISP_FEATURE_FREEBSD) || defined(__DragonFly__)
  21 #define CONTEXT_ADDR_FROM_STEM(stem) &context->uc_mcontext.mc_ ## stem
  22 #elif defined(__OpenBSD__)
  23 #define CONTEXT_ADDR_FROM_STEM(stem) &context->sc_ ## stem
  24 #elif defined __NetBSD__
  25 #define CONTEXT_ADDR_FROM_STEM(stem) &((context)->uc_mcontext.__gregs[_REG_ ## stem])
  26 #else
  27 #error unsupported BSD variant
  28 #endif
  29
  30 #if defined LISP_FEATURE_FREEBSD
  31 #if defined(LISP_FEATURE_RESTORE_TLS_SEGMENT_REGISTER_FROM_CONTEXT)
  32 void os_restore_tls_segment_register(os_context_t *context);
  33 #endif
  34 #define RESTORE_FP_CONTROL_FROM_CONTEXT
  35 void os_restore_fp_control(os_context_t *context);
  36 #endif
  37
  38 #if defined(LISP_FEATURE_OPENBSD) || defined(LISP_FEATURE_DRAGONFLY)
  39 #define RESTORE_FP_CONTROL_FROM_CONTEXT
  40 void os_restore_fp_control(os_context_t *context);
  41 #endif
  42
  43 #endif /* _X86_BSD_OS_H */