C++ (Cpp) arch_set_error Examples

Example #1

File: syscall.c Project: masatake/strace

static long
tamper_with_syscall_exiting(struct tcb *tcp)
{
	struct inject_opts *opts = tcb_inject_opts(tcp);

	if (!opts)
		return 0;

	if (opts->data.rval >= 0) {
		kernel_long_t u_rval = tcp->u_rval;

		tcp->u_rval = opts->data.rval;
		if (arch_set_success(tcp)) {
			tcp->u_rval = u_rval;
		} else {
			tcp->u_error = 0;
		}
	} else {
		unsigned long new_error = -opts->data.rval;

		if (new_error != tcp->u_error && new_error <= MAX_ERRNO_VALUE) {
			unsigned long u_error = tcp->u_error;

			tcp->u_error = new_error;
			if (arch_set_error(tcp)) {
				tcp->u_error = u_error;
			}
		}
	}

	return 0;
}

Example #2

static long
update_syscall_fault_exiting(struct tcb *tcp)
{
	struct fault_opts *opts = tcb_fault_opts(tcp);

	if (opts && opts->err > 0 && tcp->u_error != (uint16_t) opts->err) {
		unsigned long u_error = tcp->u_error;
		tcp->u_error = opts->err;
		if (arch_set_error(tcp))
			tcp->u_error = u_error;
	}

	return 0;
}