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root/cebix/BasiliskII/src/Unix/sigsegv.cpp
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Comparing BasiliskII/src/Unix/sigsegv.cpp (file contents):
Revision 1.16 by gbeauche, 2002-05-20T16:03:37Z vs.
Revision 1.17 by gbeauche, 2002-05-20T17:49:04Z

# Line 215 | Line 215 | static void powerpc_decode_instruction(i
215   #endif
216   #define SIGSEGV_FAULT_HANDLER_ARGLIST   int sig, siginfo_t *sip, void *scp
217   #define SIGSEGV_FAULT_ADDRESS                   sip->si_addr
218 + #if (defined(i386) || defined(__i386__))
219 + #define SIGSEGV_FAULT_INSTRUCTION               (((struct sigcontext *)scp)->sc_eip)
220 + #define SIGSEGV_REGISTER_FILE                   ((unsigned int *)&(((struct sigcontext *)scp)->sc_edi))
221 + #define SIGSEGV_SKIP_INSTRUCTION                ix86_skip_instruction
222 + #endif
223   #if defined(__linux__)
224   #if (defined(i386) || defined(__i386__))
225   #include <sys/ucontext.h>
# Line 388 | Line 393 | enum {
393          X86_REG_EDI = 4
394   };
395   #endif
396 + #if defined(__NetBSD__) || defined(__FreeBSD__)
397 + enum {
398 +        X86_REG_EIP = 10,
399 +        X86_REG_EAX = 7,
400 +        X86_REG_ECX = 6,
401 +        X86_REG_EDX = 5,
402 +        X86_REG_EBX = 4,
403 +        X86_REG_ESP = 13,
404 +        X86_REG_EBP = 2,
405 +        X86_REG_ESI = 1,
406 +        X86_REG_EDI = 0
407 + };
408 + #endif
409   // FIXME: this is partly redundant with the instruction decoding phase
410   // to discover transfer type and register number
411   static inline int ix86_step_over_modrm(unsigned char * p)
# Line 444 | Line 462 | static bool ix86_skip_instruction(unsign
462  
463          // Decode instruction
464          switch (eip[0]) {
465 +        case 0x0f:
466 +            if (eip[1] == 0xb7) { // MOVZX r32, r/m16
467 +                switch (eip[2] & 0xc0) {
468 +                case 0x80:
469 +                    reg = (eip[2] >> 3) & 7;
470 +                    transfer_type = TYPE_LOAD;
471 +                    break;
472 +                case 0x40:
473 +                    reg = (eip[2] >> 3) & 7;
474 +                    transfer_type = TYPE_LOAD;
475 +                    break;
476 +                case 0x00:
477 +                    reg = (eip[2] >> 3) & 7;
478 +                    transfer_type = TYPE_LOAD;
479 +                    break;
480 +                }
481 +                len += 3 + ix86_step_over_modrm(eip + 2);
482 +            }
483 +          break;
484          case 0x8a: // MOV r8, r/m8
485                  transfer_size = SIZE_BYTE;
486          case 0x8b: // MOV r32, r/m32 (or 16-bit operation)
# Line 766 | Line 803 | int main(void)
803          if (!sigsegv_install_handler(sigsegv_insn_handler))
804                  return 1;
805          
806 <        if (vm_protect((char *)page, page_size, VM_PAGE_WRITE) < 0)
806 >        if (vm_protect((char *)page, page_size, VM_PAGE_READ | VM_PAGE_WRITE) < 0)
807                  return 1;
808          
809          for (int i = 0; i < page_size; i++)

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