| /* Return codes: 1 - ok, 0 - ignore, other - error. */ | |
| static int | |
| arch_get_scno(struct tcb *tcp) | |
| { | |
| kernel_ulong_t scno = 0; | |
| if (upeek(tcp->pid, REG_A3, &alpha_a3) < 0) | |
| return -1; | |
| if (upeek(tcp->pid, REG_R0, &scno) < 0) | |
| return -1; | |
| /* | |
| * Do some sanity checks to figure out if it's | |
| * really a syscall entry | |
| */ | |
| if (!scno_in_range(scno)) { | |
| if (alpha_a3 == 0 || alpha_a3 == -1UL) { | |
| if (debug_flag) | |
| error_msg("stray syscall exit: r0 = %lu", scno); | |
| return 0; | |
| } | |
| } | |
| tcp->scno = scno; | |
| return 1; | |
| } |