src/runtime/x86-bsd-os.c

   1 #include <signal.h>
   2 #include "sbcl.h"
   3 #include "runtime.h"
   4 #include "target-os.h"
   5
   6 /* KLUDGE: There is strong family resemblance in the signal context
   7  * stuff in FreeBSD and OpenBSD, but in detail they're different in
   8  * almost every line of code. It would be nice to find some way to
   9  * factor out the commonality better; failing that, it might be best
  10  * just to split this generic-BSD code into one variant for each BSD.
  11  *
  12  * KLUDGE II: this split has begun with the addition of the Darwin BSD
  13  * flavour, with the cross-architecture complications that this
  14  * entails; unfortunately, currently the situation is worse, not
  15  * better, than in the above paragraph. */
  16
  17 #if defined(__FreeBSD__) || defined(__OpenBSD__)
  18 int *
  19 os_context_register_addr(os_context_t *context, int offset)
  20 {
  21     switch(offset) {
  22     case  0:
  23         return CONTEXT_ADDR_FROM_STEM(eax);
  24     case  2:
  25         return CONTEXT_ADDR_FROM_STEM(ecx);
  26     case  4:
  27         return CONTEXT_ADDR_FROM_STEM(edx);
  28     case  6:
  29         return CONTEXT_ADDR_FROM_STEM(ebx);
  30     case  8:
  31         return CONTEXT_ADDR_FROM_STEM(esp);
  32     case 10:
  33         return CONTEXT_ADDR_FROM_STEM(ebp);
  34     case 12:
  35         return CONTEXT_ADDR_FROM_STEM(esi);
  36     case 14:
  37         return CONTEXT_ADDR_FROM_STEM(edi);
  38     default:
  39         return 0;
  40     }
  41 }
  42
  43 int *
  44 os_context_sp_addr(os_context_t *context)
  45 {
  46     return CONTEXT_ADDR_FROM_STEM(esp);
  47 }
  48
  49 #endif /* __FreeBSD__ || __OpenBSD__ */
  50
  51 #ifdef __NetBSD__
  52 int *
  53 os_context_register_addr(os_context_t *context, int offset)
  54 {
  55     switch(offset) {
  56     case  0:
  57         return CONTEXT_ADDR_FROM_STEM(EAX);
  58     case  2:
  59         return CONTEXT_ADDR_FROM_STEM(ECX);
  60     case  4:
  61         return CONTEXT_ADDR_FROM_STEM(EDX);
  62     case  6:
  63         return CONTEXT_ADDR_FROM_STEM(EBX);
  64     case  8:
  65         return CONTEXT_ADDR_FROM_STEM(ESP);
  66     case 10:
  67         return CONTEXT_ADDR_FROM_STEM(EBP);
  68     case 12:
  69         return CONTEXT_ADDR_FROM_STEM(ESI);
  70     case 14:
  71         return CONTEXT_ADDR_FROM_STEM(EDI);
  72     case 16:
  73         return CONTEXT_ADDR_FROM_STEM(UESP);
  74     default:
  75         return 0;
  76     }
  77 }
  78
  79 int *
  80 os_context_sp_addr(os_context_t *context)
  81 {
  82     return &(_UC_MACHINE_SP(context));
  83 }
  84
  85 #endif  /* __NetBSD__ */
  86
  87
  88
  89 /* FIXME: If this can be a no-op on BSD/x86, then it
  90  * deserves a more precise name.
  91  *
  92  * (Perhaps os_prepare_data_area_to_be_executed()?) */
  93 void
  94 os_flush_icache(os_vm_address_t address, os_vm_size_t length)
  95 {
  96 }