granicus.if.org Git - strace/blob - linux/powerpc/get_syscall_args.c

   1 /* Return -1 on error or 1 on success (never 0!). */
   2 static int
   3 get_syscall_args(struct tcb *tcp)
   4 {
   5         if (current_personality != 0) {
   6                 /*
   7                  * Zero-extend from 32 bits.
   8                  * Use truncate_klong_to_current_wordsize(tcp->u_arg[N])
   9                  * in syscall handlers
  10                  * if you need to use *sign-extended* parameter.
  11                  */
  12                 tcp->u_arg[0] = (uint32_t) ppc_regs.orig_gpr3;
  13                 tcp->u_arg[1] = (uint32_t) ppc_regs.gpr[4];
  14                 tcp->u_arg[2] = (uint32_t) ppc_regs.gpr[5];
  15                 tcp->u_arg[3] = (uint32_t) ppc_regs.gpr[6];
  16                 tcp->u_arg[4] = (uint32_t) ppc_regs.gpr[7];
  17                 tcp->u_arg[5] = (uint32_t) ppc_regs.gpr[8];
  18         } else {
  19                 tcp->u_arg[0] = ppc_regs.orig_gpr3;
  20                 tcp->u_arg[1] = ppc_regs.gpr[4];
  21                 tcp->u_arg[2] = ppc_regs.gpr[5];
  22                 tcp->u_arg[3] = ppc_regs.gpr[6];
  23                 tcp->u_arg[4] = ppc_regs.gpr[7];
  24                 tcp->u_arg[5] = ppc_regs.gpr[8];
  25         }
  26         return 1;
  27 }