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61d378f5e9
Commit e8d340de ("Remove a.out support from nlist()") introduced a copy
of the definition of nlist from a.out.h. However, as well as having
n_name inside n_un, on the various BSDs n_name could also be accessed
as a direct member of nlist, and this is made use of by FreeBSD's
usr.bin/netstat/main.c. Thus we should also add the same enclosing
anonymous union.
[guillem@hadrons.org:
- Add a minimal unit test. ]
Closes: !4
Signed-off-by: Guillem Jover <guillem@hadrons.org>
103 lines
3.4 KiB
C
103 lines
3.4 KiB
C
/*
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* Copyright © 2009 Guillem Jover <guillem@hadrons.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef LIBBSD_NLIST_H
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#define LIBBSD_NLIST_H
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#ifdef LIBBSD_OVERLAY
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#include <sys/cdefs.h>
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#else
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#include <bsd/sys/cdefs.h>
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#endif
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struct nlist {
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union {
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char *n_name;
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union {
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char *n_name;
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struct n_list *n_next;
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long n_strx;
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} n_un;
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};
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unsigned char n_type;
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char n_other;
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short n_desc;
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unsigned long n_value;
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};
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#define n_hash n_desc /* used internally by ld(1); XXX */
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/*
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* Defines for n_type.
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*/
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#define N_UNDF 0x00 /* Undefined */
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#define N_ABS 0x02 /* Absolute address */
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#define N_TEXT 0x04 /* Text segment */
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#define N_DATA 0x06 /* Data segment */
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#define N_BSS 0x08 /* Bss segment */
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#define N_INDR 0x0a /* Alias definition */
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#define N_SIZE 0x0c /* Pseudo type, defines a symbol's size */
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#define N_COMM 0x12 /* Common reference */
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/* GNU extensions */
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#define N_SETA 0x14 /* Absolute set element symbol */
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#define N_SETT 0x16 /* Text set element symbol */
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#define N_SETD 0x18 /* Data set element symbol */
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#define N_SETB 0x1a /* Bss set element symbol */
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#define N_SETV 0x1c /* Set vector symbol */
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/* end GNU extensions */
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#define N_FN 0x1e /* File name (N_EXT on) */
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#define N_WARN 0x1e /* Warning message (N_EXT off) */
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#define N_EXT 0x01 /* External (global) bit, OR'ed in */
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#define N_TYPE 0x1e /* Mask for all the type bits */
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#define N_STAB 0xe0 /* Mask for debugger symbols -- stab(5) */
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#define N_NAME(p) ((p)->n_un.n_name)
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/*
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* Defines for n_other. It contains the ".type" (AUX) field in the least
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* significant 4 bits, and the binding (for weak symbols) in the most
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* significant 4 bits.
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*/
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#define N_AUX(p) ((p)->n_other & 0xf)
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#define N_BIND(p) (((unsigned int)(p)->n_other >> 4) & 0xf)
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#define N_OTHER(r, v) (((unsigned int)(r) << 4) | ((v) & 0xf))
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#define AUX_OBJECT 1 /* Data object */
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#define AUX_FUNC 2 /* Function */
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/*#define BIND_LOCAL 0 Not used */
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/*#define BIND_GLOBAL 1 Not used */
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#define BIND_WEAK 2 /* Weak binding */
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#define N_FORMAT "%08x" /* namelist value format; XXX */
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__BEGIN_DECLS
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extern int nlist(const char *filename, struct nlist *list);
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__END_DECLS
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#endif
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