1 /* Return -1 on error or 1 on success (never 0!). */ 2 static int 3 get_syscall_args(struct tcb *tcp) 4 { 5 if (tcp->currpers == 1) { 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) sparc_regs.u_regs[U_REG_O0 + 0]; 13 tcp->u_arg[1] = (uint32_t) sparc_regs.u_regs[U_REG_O0 + 1]; 14 tcp->u_arg[2] = (uint32_t) sparc_regs.u_regs[U_REG_O0 + 2]; 15 tcp->u_arg[3] = (uint32_t) sparc_regs.u_regs[U_REG_O0 + 3]; 16 tcp->u_arg[4] = (uint32_t) sparc_regs.u_regs[U_REG_O0 + 4]; 17 tcp->u_arg[5] = (uint32_t) sparc_regs.u_regs[U_REG_O0 + 5]; 18 } else { 19 tcp->u_arg[0] = sparc_regs.u_regs[U_REG_O0 + 0]; 20 tcp->u_arg[1] = sparc_regs.u_regs[U_REG_O0 + 1]; 21 tcp->u_arg[2] = sparc_regs.u_regs[U_REG_O0 + 2]; 22 tcp->u_arg[3] = sparc_regs.u_regs[U_REG_O0 + 3]; 23 tcp->u_arg[4] = sparc_regs.u_regs[U_REG_O0 + 4]; 24 tcp->u_arg[5] = sparc_regs.u_regs[U_REG_O0 + 5]; 25 } 26 27 return 1; 28 } 29
