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libctf, include: add ctf_getsymsect and ctf_getstrsect

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libctf has long provided ctf_getdatasect, which hands back a pointer to
the CTF section a (read-only) dict came from.  But it has no such
functions to return pointers to the ELF symbol table or string table
it's working from, which is unfortunate because several libctf functions
(ctf_open, ctf_fdopen, and ctf_bfdopen) figure out which string and
symbol table to use themselves, and don't tell the user what they
decided, so the caller can't agree on which symtab to use with libctf
even if it wanted to.

Add a pair of functions to return the symtab and strtab in use.  Like
ctf_getdatasect, these return ctf_sect_t structures by value, filled
with all-NULL/0 content if a symtab or strtab is not being used.

include/ChangeLog
2020-11-20  Nick Alcock  <nick.alcock@oracle.com>

	* ctf-api.h (ctf_getsymsect): New.
	(ctf_getstrsect): Likewise.

libctf/ChangeLog
2020-11-20  Nick Alcock  <nick.alcock@oracle.com>

	* ctf-open.c (ctf_getsymsect): New.
	(ctf_getstrsect): Likewise.
	* libctf.ver: Add them.
This commit is contained in:
Nick Alcock 2020-11-20 13:34:04 +00:00
parent 2c78e92523
commit 97a2a623d0
5 changed files with 28 additions and 0 deletions
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5
include/ChangeLog
View File

@ -1,3 +1,8 @@
2020-11-20 Nick Alcock <nick.alcock@oracle.com>
* ctf-api.h (ctf_getsymsect): New.
(ctf_getstrsect): Likewise.
2020-11-20 Nick Alcock <nick.alcock@oracle.com>
* ctf-api.h (ctf_arc_lookup_symbol): New.

2
include/ctf-api.h
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@ -307,6 +307,8 @@ extern ctf_archive_t *ctf_open (const char *filename,
const char *target, int *errp);
extern void ctf_close (ctf_archive_t *);
extern ctf_sect_t ctf_getdatasect (const ctf_dict_t *);
extern ctf_sect_t ctf_getsymsect (const ctf_dict_t *);
extern ctf_sect_t ctf_getstrsect (const ctf_dict_t *);
extern ctf_archive_t *ctf_get_arc (const ctf_dict_t *);
extern ctf_archive_t *ctf_arc_open (const char *, int *);
extern ctf_archive_t *ctf_arc_bufopen (const ctf_sect_t *,

6
libctf/ChangeLog
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@ -1,3 +1,9 @@
2020-11-20 Nick Alcock <nick.alcock@oracle.com>
* ctf-open.c (ctf_getsymsect): New.
(ctf_getstrsect): Likewise.
* libctf.ver: Add them.
2020-11-20 Nick Alcock <nick.alcock@oracle.com>
* ctf-impl.h (struct ctf_archive_internal) <ctfi_dicts>: New, dicts

12
libctf/ctf-open.c
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@ -1854,6 +1854,18 @@ ctf_getdatasect (const ctf_dict_t *fp)
return fp->ctf_data;
}
ctf_sect_t
ctf_getsymsect (const ctf_dict_t *fp)
{
return fp->ctf_symtab;
}
ctf_sect_t
ctf_getstrsect (const ctf_dict_t *fp)
{
return fp->ctf_strtab;
}
/* Return the CTF handle for the parent CTF dict, if one exists. Otherwise
return NULL to indicate this dict has no imported parent. */
ctf_dict_t *

3
libctf/libctf.ver
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@ -190,4 +190,7 @@ LIBCTF_1.1 {
ctf_arc_lookup_symbol;
ctf_arc_flush_caches;
ctf_getsymsect;
ctf_getstrsect;
} LIBCTF_1.0;