4 #ifdef LISP_FEATURE_FREEBSD
5 #include <machine/segments.h>
6 #include <machine/cpufunc.h>
9 typedef int os_context_register_t;
11 static inline os_context_t *arch_os_get_context(void **void_context)
13 return (os_context_t *) *void_context;
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 __FreeBSD__
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])
27 #error unsupported BSD variant
30 #if defined LISP_FEATURE_FREEBSD
31 #define RESTORE_FP_CONTROL_FROM_CONTEXT
32 void os_restore_fp_control(os_context_t *context);
35 #endif /* _X86_BSD_OS_H */