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Remove a.out support from nlist()

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Some libc libraries do not have an <a.out.h> header. And a.out as an
executable format is very much obsolete on pretty much all currently
supported systems, even if they might still support loading such
objects.

Remove the a.out support to increase portability.
This commit is contained in:
Guillem Jover
2017-06-05 05:30:27 +02:00
parent 7aede6a999
commit e8d340de9e
2 changed files with 109 additions and 201 deletions
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63
include/bsd/nlist.h
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@@ -29,11 +29,64 @@
#include <sys/cdefs.h>
#if __has_include(<a.out.h>)
#include <a.out.h>
#elif __has_include(<linux/a.out.h>)
#include <linux/a.out.h>
#endif
struct nlist {
union {
char *n_name;
struct n_list *n_next;
long n_strx;
} n_un;
unsigned char n_type;
char n_other;
short n_desc;
unsigned long n_value;
};
#define n_hash n_desc /* used internally by ld(1); XXX */
/*
* Defines for n_type.
*/
#define N_UNDF 0x00 /* Undefined */
#define N_ABS 0x02 /* Absolute address */
#define N_TEXT 0x04 /* Text segment */
#define N_DATA 0x06 /* Data segment */
#define N_BSS 0x08 /* Bss segment */
#define N_INDR 0x0a /* Alias definition */
#define N_SIZE 0x0c /* Pseudo type, defines a symbol's size */
#define N_COMM 0x12 /* Common reference */
/* GNU extensions */
#define N_SETA 0x14 /* Absolute set element symbol */
#define N_SETT 0x16 /* Text set element symbol */
#define N_SETD 0x18 /* Data set element symbol */
#define N_SETB 0x1a /* Bss set element symbol */
#define N_SETV 0x1c /* Set vector symbol */
/* end GNU extensions */
#define N_FN 0x1e /* File name (N_EXT on) */
#define N_WARN 0x1e /* Warning message (N_EXT off) */
#define N_EXT 0x01 /* External (global) bit, OR'ed in */
#define N_TYPE 0x1e /* Mask for all the type bits */
#define N_STAB 0xe0 /* Mask for debugger symbols -- stab(5) */
#define N_NAME(p) ((p)->n_un.n_name)
/*
* Defines for n_other. It contains the ".type" (AUX) field in the least
* significant 4 bits, and the binding (for weak symbols) in the most
* significant 4 bits.
*/
#define N_AUX(p) ((p)->n_other & 0xf)
#define N_BIND(p) (((unsigned int)(p)->n_other >> 4) & 0xf)
#define N_OTHER(r, v) (((unsigned int)(r) << 4) | ((v) & 0xf))
#define AUX_OBJECT 1 /* Data object */
#define AUX_FUNC 2 /* Function */
/*#define BIND_LOCAL 0 Not used */
/*#define BIND_GLOBAL 1 Not used */
#define BIND_WEAK 2 /* Weak binding */
#define N_FORMAT "%08x" /* namelist value format; XXX */
__BEGIN_DECLS
extern int nlist(const char *filename, struct nlist *list);