5 /* TODO(bernhard): use {u,}int* types */
8 // Note by hs: my signal.h includes sys/uconctext which conflicts with
9 // asm/ucontext - this hack kinda solves the problem for me ;-)
10 // so feel free to blame me for that s**t
11 #if defined __USE_XOPEN2K8
14 #warning hs-hack: undefining __USE_XOPEN2K8 for signal.h
18 #define __USE_XOPEN2K8
21 #include <sys/ucontext.h>
23 ptrdiff_t mateHandler(ptrdiff_t, ptrdiff_t, ptrdiff_t, ptrdiff_t);
26 #define dprintf(args...) do { printf (args); } while (0);
28 #define dprintf(args...)
31 void chandler(int nSignal, siginfo_t *info, void *ctx)
33 mcontext_t *mctx = &((ucontext_t *) ctx)->uc_mcontext;
34 greg_t *regs = mctx->gregs;
36 ptrdiff_t eip = (ptrdiff_t) regs[REG_EIP];
37 ptrdiff_t eax = (ptrdiff_t) regs[REG_EAX];
38 ptrdiff_t ebx = (ptrdiff_t) regs[REG_EBX];
39 ptrdiff_t esp = (ptrdiff_t) regs[REG_ESP];
40 ptrdiff_t esi = (ptrdiff_t) regs[REG_ESI];
41 ptrdiff_t ebp = (ptrdiff_t) regs[REG_EBP];
42 dprintf("trap: type %d, eip 0x%08x, eax 0x%08x, ebx 0x%08x, \n"
43 "esp 0x%08x, *esp 0x%08x, *(ebp+8) 0x%08x\n", nSignal, eip,
44 eax, ebx, esp, *(ptrdiff_t*) esp, *(ptrdiff_t *) (ebp + 8));
46 ptrdiff_t ret = mateHandler(eip, eax, ebx, esi);
48 dprintf("regdump @ EIP: 0x%08x\n", regs[REG_EIP]);
49 dprintf("\tEAX: 0x%08lx EBX: 0x%08lx ECX: 0x%08lx EDX: 0x%08lx\n",
50 regs[REG_EAX], regs[REG_EBX], regs[REG_ECX], regs[REG_EDX]);
51 dprintf("\tESI: 0x%08lx EDI: 0x%08lx EBP: 0x%08lx ESP: 0x%08lx\n",
52 regs[REG_ESI], regs[REG_EDI], regs[REG_EBP], regs[REG_ESP]);
53 mctx->gregs[REG_EIP] = eip + 6;
55 mctx->gregs[REG_EIP] = ret;
59 void register_signal(void)
61 struct sigaction illaction;
62 illaction.sa_sigaction = chandler;
63 sigemptyset(&illaction.sa_mask);
64 illaction.sa_flags = SA_SIGINFO | SA_RESTART | SA_NODEFER;
65 sigaction(SIGILL, &illaction, NULL);
67 struct sigaction segvaction;
68 segvaction.sa_sigaction = chandler;
69 sigemptyset(&segvaction.sa_mask);
70 segvaction.sa_flags = SA_SIGINFO | SA_RESTART | SA_NODEFER;
71 sigaction(SIGSEGV, &segvaction, NULL);