1 /* Return codes: 1 - ok, 0 - ignore, other - error. */ 2 static int arch_get_scno(struct tcb * tcp)3arch_get_scno(struct tcb *tcp) 4 { 5 /* Retrieve the syscall trap instruction. */ 6 unsigned long trap; 7 errno = 0; 8 trap = ptrace(PTRACE_PEEKTEXT, tcp->pid, (char *)sparc_regs.tpc, 0); 9 if (errno) 10 return -1; 11 trap >>= 32; 12 switch (trap) { 13 case 0x91d02010: 14 /* Linux/SPARC syscall trap. */ 15 update_personality(tcp, 0); 16 break; 17 case 0x91d0206d: 18 /* Linux/SPARC64 syscall trap. */ 19 update_personality(tcp, 1); 20 break; 21 } 22 23 tcp->scno = sparc_regs.u_regs[U_REG_G1]; 24 return 1; 25 } 26