#include <stdio.h>
#include <stdlib.h>
+#include <stddef.h>
#include "../debug.h"
#include <sys/ucontext.h>
-unsigned int mallocObject(int);
-unsigned int mateHandler(unsigned int, unsigned int, unsigned int, unsigned int);
+ptrdiff_t mateHandler(ptrdiff_t, ptrdiff_t, ptrdiff_t, ptrdiff_t);
#ifdef DBG_TRAP
#define dprintf(args...) do { printf (args); } while (0);
#define dprintf(args...)
#endif
-void mainresult(unsigned int a)
-{
- dprintf("mainresult: 0x%08x\n", a);
-}
-
void chandler(int nSignal, siginfo_t *info, void *ctx)
{
mcontext_t *mctx = &((ucontext_t *) ctx)->uc_mcontext;
+ greg_t *regs = mctx->gregs;
- unsigned int eip = (unsigned int) mctx->gregs[REG_EIP];
- unsigned int eax = (unsigned int) mctx->gregs[REG_EAX];
- unsigned int ebx = (unsigned int) mctx->gregs[REG_EBX];
- unsigned int esp = (unsigned int) mctx->gregs[REG_ESP];
+ ptrdiff_t eip = (ptrdiff_t) regs[REG_EIP];
+ ptrdiff_t eax = (ptrdiff_t) regs[REG_EAX];
+ ptrdiff_t ebx = (ptrdiff_t) regs[REG_EBX];
+ ptrdiff_t esp = (ptrdiff_t) regs[REG_ESP];
+ ptrdiff_t esi = (ptrdiff_t) regs[REG_ESI];
+ ptrdiff_t ebp = (ptrdiff_t) regs[REG_EBP];
+ dprintf("trap: type %d, eip 0x%08x, eax 0x%08x, ebx 0x%08x, \n"
+ "esp 0x%08x, *esp 0x%08x, *(ebp+8) 0x%08x\n", nSignal, eip,
+ eax, ebx, esp, *(ptrdiff_t*) esp, *(ptrdiff_t *) (ebp + 8));
- mctx->gregs[REG_EIP] = mateHandler(eip, eax, ebx, esp);
+ ptrdiff_t ret = mateHandler(eip, eax, ebx, esi);
+ if (ret == -1) {
+ dprintf("regdump @ EIP: 0x%08x\n", regs[REG_EIP]);
+ dprintf("\tEAX: 0x%08lx EBX: 0x%08lx ECX: 0x%08lx EDX: 0x%08lx\n",
+ regs[REG_EAX], regs[REG_EBX], regs[REG_ECX], regs[REG_EDX]);
+ dprintf("\tESI: 0x%08lx EDI: 0x%08lx EBP: 0x%08lx ESP: 0x%08lx\n",
+ regs[REG_ESI], regs[REG_EDI], regs[REG_EBP], regs[REG_ESP]);
+ mctx->gregs[REG_EIP] = eip + 6;
+ } else {
+ mctx->gregs[REG_EIP] = ret;
+ }
}
void register_signal(void)
segvaction.sa_flags = SA_SIGINFO | SA_RESTART | SA_NODEFER;
sigaction(SIGSEGV, &segvaction, NULL);
}
-
-unsigned int getaddr(void)
-{
- return (unsigned int) mainresult;
-}
-
-unsigned int getMallocObjectAddr(void)
-{
- return (unsigned int) mallocObject;
-}