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Brooks Davis
95e33099c7
The UEXTERROR(3) macro is a partial analog to EXTERROR(9) that sets the current user exterror state and errno. The main difference is that it returns no value and sets errno directly since that's the typical pattern in libraries. While here move the storage and constructor for single-threaded program's uexterr to its own file. Reviewed by: kib Effort: CHERI upstreaming Sponsored by: Innovate UK Differential Revision: https://reviews.freebsd.org/D58059
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2025 The FreeBSD Foundation
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* Copyright (c) 2026 Capabilities Limited
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* All rights reserved.
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*
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* This software were developed by Konstantin Belousov <[email protected]>
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* under sponsorship from the FreeBSD Foundation.
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*
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* This software was developed by Capabilities Limited with funding from
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* Innovate UK and the Department for Science, Innovation and Technology
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* for the adoption and diffusion of CHERI technology under project
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* 10168042 (“CheriBSD feature extraction, maturity, and testing”).
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*/
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#ifndef _UEXTERROR_H_
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#define _UEXTERROR_H_
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#include <sys/types.h>
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#include <sys/linker_set.h>
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struct exterr_cat {
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unsigned int cat;
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const char *file;
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};
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#ifndef UEXTERR_CATEGORY
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#error "Specify error category before including uexterror.h"
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#endif
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#ifndef NO_UEXTERR_STRINGS
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static struct exterr_cat __dynamic_cat = { .file = UEXTERR_CATEGORY };
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DATA_WSET(exterr_cats, __dynamic_cat);
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#define _UEXTERR_CATEGORY \
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(__dynamic_cat.cat | EXTERR_CAT_SRC_USER)
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#else
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#define _UEXTERR_CATEGORY (EXTERR_CAT_NONE | EXTERR_CAT_SRC_USER)
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#endif
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#ifdef NO_UEXTERR_STRINGS
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#define SET_ERROR_MSG(mmsg) NULL
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#else
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#define SET_ERROR_MSG(mmsg) (mmsg)
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#endif
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#define _SET_ERROR2(eerror, mmsg, pp1, pp2) \
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uexterr_set(eerror, _UEXTERR_CATEGORY, SET_ERROR_MSG(mmsg), \
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(uint64ptr_t)(pp1), (uint64ptr_t)(pp2), __LINE__)
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#define _SET_ERROR0(eerror, mmsg) _SET_ERROR2(eerror, mmsg, 0, 0)
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#define _SET_ERROR1(eerror, mmsg, pp1) _SET_ERROR2(eerror, mmsg, pp1, 0)
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#define _UEXTERROR_MACRO(eerror, mmsg, _1, _2, NAME, ...) \
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NAME
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#define UEXTERROR(...) \
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_UEXTERROR_MACRO(__VA_ARGS__, _SET_ERROR2, _SET_ERROR1, \
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_SET_ERROR0)(__VA_ARGS__)
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__BEGIN_DECLS
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void uexterr_set(int error, int category, const char *mmsg, uint64ptr_t pp1,
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uint64ptr_t pp2, int line);
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__END_DECLS
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#endif
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