xref: /aosp_15_r20/external/strace/linux/sh/get_syscall_args.c (revision cf84ac9a129d8ea9952db616b4e9b904c4bdde56)
1*cf84ac9aSAndroid Build Coastguard Worker /* Return -1 on error or 1 on success (never 0!). */
2*cf84ac9aSAndroid Build Coastguard Worker static int
get_syscall_args(struct tcb * tcp)3*cf84ac9aSAndroid Build Coastguard Worker get_syscall_args(struct tcb *tcp)
4*cf84ac9aSAndroid Build Coastguard Worker {
5*cf84ac9aSAndroid Build Coastguard Worker 	static const int syscall_regs[MAX_ARGS] = {
6*cf84ac9aSAndroid Build Coastguard Worker 		4 * (REG_REG0+4),
7*cf84ac9aSAndroid Build Coastguard Worker 		4 * (REG_REG0+5),
8*cf84ac9aSAndroid Build Coastguard Worker 		4 * (REG_REG0+6),
9*cf84ac9aSAndroid Build Coastguard Worker 		4 * (REG_REG0+7),
10*cf84ac9aSAndroid Build Coastguard Worker 		4 * (REG_REG0  ),
11*cf84ac9aSAndroid Build Coastguard Worker 		4 * (REG_REG0+1)
12*cf84ac9aSAndroid Build Coastguard Worker 	};
13*cf84ac9aSAndroid Build Coastguard Worker 	unsigned int i;
14*cf84ac9aSAndroid Build Coastguard Worker 
15*cf84ac9aSAndroid Build Coastguard Worker 	for (i = 0; i < tcp->s_ent->nargs; ++i)
16*cf84ac9aSAndroid Build Coastguard Worker 		if (upeek(tcp, syscall_regs[i], &tcp->u_arg[i]) < 0)
17*cf84ac9aSAndroid Build Coastguard Worker 			return -1;
18*cf84ac9aSAndroid Build Coastguard Worker 	return 1;
19*cf84ac9aSAndroid Build Coastguard Worker }
20