strace/linux/tile/get_error.c

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/*
* Copyright (c) 2015-2018 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "negated_errno.h"
static void
arch_get_error(struct tcb *tcp, const bool check_errno)
{
/*
* The standard tile calling convention returns the value
* (or negative errno) in r0, and zero (or positive errno) in r1.
* Until at least kernel 3.8, however, the r1 value is not
* reflected in ptregs at this point, so we use r0 here.
*/
if (check_errno && is_negated_errno(tile_regs.regs[0])) {
tcp->u_rval = -1;
tcp->u_error = -tile_regs.regs[0];
} else {
tcp->u_rval = tile_regs.regs[0];
}
}