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/* See LICENSE file for copyright and license details. */
/* This file is included from ../libsyscalls_get_datatype_description.c */
/* If new architectures are added, the table at the top of
* ../libsyscalls_get_datatype_description.c must be updated */
static enum libsyscalls_error
get_linux_datatype_description(enum libsyscalls_arch arch, enum libsyscalls_datatype *datatype,
struct libsyscalls_datatype_description *description_out,
int *divide_array_size_with_type_size_out)
{
/*
* Generally Linux has char as 8 bit, short int as 16, int as 32 bit,
* and long long int as 64 bit (it's code even make such assumptions),
* however that's is not necessarily the case for more exotic
* architectures, for example, some specialised processors have 16 bit
* chars and run Linux (although not mainline). Linux also used
* long int for addresses (intptr_t), which is normally how it should
* be done but Windows always set long int to 32 bit (at least on x86/amd64)
* for backwards compatibility, and of course it cannot be assumed that
* Linux does something similar this for some architecture in the future
* (although that looks very unlikely, at least 32+-bit architecture,
* it is of course possible that if Linux is ported to a 16-bit architecture,
* intptr_t would be 16 bits, and thus long int must be something else
* as it must be at least 32 bits). It's probably safe to assume,
* system calls use intptr_t/uintptr_t.
*/
switch ((int)*datatype) {
case LIBSYSCALLS_TYPE_SCHAR: description_out->width_in_bits = 8; break;
case LIBSYSCALLS_TYPE_SHORT: description_out->width_in_bits = 16; break;
case LIBSYSCALLS_TYPE_INT: description_out->width_in_bits = 32; break;
case LIBSYSCALLS_TYPE_LLONG: description_out->width_in_bits = 64; break;
case LIBSYSCALLS_TYPE_LONG:
case LIBSYSCALLS_TYPE_DYNAMIC: /* syscall */
*datatype = LIBSYSCALLS_TYPE_INTPTR;
break;
case LIBSYSCALLS_TYPE_FD_SET:
*datatype = LIBSYSCALLS_TYPE_INTPTR;
description_out->array_size = 1024;
*divide_array_size_with_type_size_out = 1;
break;
default:
/* something only defined on some other operating system */
return LIBSYSCALLS_E_NOSUCHTYPE;
}
return LIBSYSCALLS_E_OK;
}
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