Attachment 148611 Details for Bug 194570 – modified test case

modified test case

syscallInterrupt.c (text/x-csrc), 2.49 KB, created by Archana K. Raghavan on 2007-02-22 19:17:00 UTC

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Creator: Archana K. Raghavan

Created: 2007-02-22 19:17:00 UTC

Size: 2.49 KB

patch

obsolete

>#include <unistd.h>
>#include <stdio.h>
>#include <errno.h>
>#include <string.h>
>#include <signal.h>
>#include <sys/types.h>
>#include <stdlib.h>
>#include <ucontext.h>
>
>void segHandler(int signo, siginfo_t* info, void* arg)
>{
>  printf("In segv handler, this is the context that received the SIGSEGV:\n");
>  
>  struct ucontext* ctx = (struct ucontext*)arg;
>
>  printf("IP: 0x%x\n", ctx->uc_mcontext.regs->nip);
>  
>  int i;
>  for (i=0; i < 32; i++)
>  {
>    printf("r%d: 0x%x\n", i, (((struct pt_regs*)((&ctx->uc_mcontext))->regs))->gpr[i]);
>  }
>
>  exit(0);
>}
>
>
>void alarmHandler(int signo, siginfo_t* info, void* arg)
>{
>  printf("alarmHandler: setting regs 13-31 to 0xdeadbeef in the context\n");
>  
>  struct ucontext* ctx = (struct ucontext*)arg;
>  
>  int i;
>  for (i=0; i < 32; i++)
>  {
>    if(i > 13)
>    {
>      (((struct pt_regs*)((&ctx->uc_mcontext))->regs))->gpr[i] = 0xdeadbeef;
>    }
>  }
> 
>  printf("alarmHandler: loading r13-31 with bogus values and jumping to 0 to force SIGSEGV.\n");
>
>  ctx->uc_mcontext.regs->nip = 0;
>  
>#ifdef USE_SETCONTEXT
>  setcontext(ctx);
>  printf("Should not reach this point\n");
>#endif
>  
>  asm volatile("li %r14, 0x1414");
>  asm volatile("li %r15, 0x1515");
>  asm volatile("li %r16, 0x1616");
>  asm volatile("li %r17, 0x1717");
>  asm volatile("li %r18, 0x1818");
>  asm volatile("li %r19, 0x1919");
>  asm volatile("li %r20, 0x2020");
>  asm volatile("li %r21, 0x2121");
>  asm volatile("li %r22, 0x2222");
>  asm volatile("li %r23, 0x2323");
>  asm volatile("li %r24, 0x2424");
>  asm volatile("li %r25, 0x2525");
>  asm volatile("li %r26, 0x2626");
>  asm volatile("li %r27, 0x2727");
>  asm volatile("li %r28, 0x2828");
>  asm volatile("li %r29, 0x2929");
>  asm volatile("li %r30, 0x3030");
>  asm volatile("li %r31, 0x3131");
>}
>
>
>int main()
>{
>  /* Register a handler for SIGALRM */
>  struct sigaction sa;
>  memset(&sa,0,sizeof(sa));
>  sa.sa_sigaction = alarmHandler;
>  sa.sa_flags = SA_SIGINFO;
>
>  if(sigaction(SIGALRM,&sa, 0))
>  {
>    printf("Unable to register alarm handler.\n");
>    exit(1);
>  }
>
>  /* Register a handler for SIGSEGV */
>  struct sigaction sa2;
>  memset(&sa2,0,sizeof(sa2));
>  sa2.sa_sigaction = segHandler;
>  sa2.sa_flags = SA_SIGINFO;
>  if(sigaction(SIGSEGV,&sa2, 0))
>  {
>    printf("Unable to register seg handler.\n");
>    exit(1);
>  }
>
>#ifdef RAISE
>  printf("Calling raise(SIGALRM)\n");
>  raise(SIGALRM);
>#else
>  printf("Setting up an alarm signal to arrive in 1s.\n");
>  alarm(1);
>  printf("Starting a read syscall that will block and get interrupted.\n");
>  char buf[1000];
>  read(0,buf,1000);
>#endif
>}

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Attachments on bug 194570: 130802 | 144549 | 144550 | 148610 | 148611