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author | dfr <dfr@FreeBSD.org> | 1998-08-12 08:44:21 +0000 |
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committer | dfr <dfr@FreeBSD.org> | 1998-08-12 08:44:21 +0000 |
commit | 83a1a3f54192b4d44b8c8005fd239b808921a00d (patch) | |
tree | a363c4b2d7436b2f2026b1801319b94bf7a1e0a3 /sys/kern/link_aout.c | |
parent | 235b27cb8f07021d421f50ffdf3d09e2b30c613d (diff) | |
download | FreeBSD-src-83a1a3f54192b4d44b8c8005fd239b808921a00d.zip FreeBSD-src-83a1a3f54192b4d44b8c8005fd239b808921a00d.tar.gz |
Modify the internal interfaces to the kernel linker to make it possible
for DDB to use its symbol tables.
Diffstat (limited to 'sys/kern/link_aout.c')
-rw-r--r-- | sys/kern/link_aout.c | 77 |
1 files changed, 69 insertions, 8 deletions
diff --git a/sys/kern/link_aout.c b/sys/kern/link_aout.c index 4126ae1..5b4e47c 100644 --- a/sys/kern/link_aout.c +++ b/sys/kern/link_aout.c @@ -23,7 +23,7 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * $Id: link_aout.c,v 1.7 1998/07/07 04:31:27 bde Exp $ + * $Id: link_aout.c,v 1.8 1998/07/15 02:32:11 bde Exp $ */ #include <sys/param.h> @@ -43,7 +43,11 @@ static int link_aout_load_file(const char*, linker_file_t*); static int link_aout_lookup_symbol(linker_file_t, const char*, - caddr_t*, size_t*); + linker_sym_t*); +static void link_aout_symbol_values(linker_file_t file, linker_sym_t sym, + linker_symval_t* symval); +static int link_aout_search_symbol(linker_file_t lf, caddr_t value, + linker_sym_t* sym, long* diffp); static void link_aout_unload(linker_file_t); /* @@ -59,6 +63,8 @@ static struct linker_class_ops link_aout_class_ops = { static struct linker_file_ops link_aout_file_ops = { link_aout_lookup_symbol, + link_aout_symbol_values, + link_aout_search_symbol, link_aout_unload, }; @@ -374,7 +380,7 @@ symbol_hash_value(aout_file_t af, const char* name) int link_aout_lookup_symbol(linker_file_t file, const char* name, - caddr_t* address, size_t* size) + linker_sym_t* sym) { aout_file_t af = file->priv; long hashval; @@ -437,15 +443,70 @@ restart: if (np->nz_other == AUX_FUNC) /* weak function */ return ENOENT; - *address = 0; - *size = np->nz_value; - } else { - *address = AOUT_RELOC(af, char, np->nz_value); - *size = np->nz_size; } + *sym = (linker_sym_t) np; + return 0; } + +static void +link_aout_symbol_values(linker_file_t file, linker_sym_t sym, + linker_symval_t* symval) +{ + aout_file_t af = file->priv; + struct nzlist* np = (struct nzlist*) sym; + char* stringbase; + + stringbase = AOUT_RELOC(af, char, LD_STRINGS(af->dynamic)); + + symval->name = stringbase + np->nz_strx + 1; /* +1 for '_' */ + if (np->nz_type == N_UNDF+N_EXT && np->nz_value != 0) { + symval->value = 0; + symval->size = np->nz_value; + } else { + symval->value = AOUT_RELOC(af, char, np->nz_value); + symval->size = np->nz_size; + } +} + +static int +link_aout_search_symbol(linker_file_t lf, caddr_t value, + linker_sym_t* sym, long* diffp) +{ + aout_file_t af = lf->priv; + u_long off = (u_long) value; + u_long diff = off; + struct nzlist* sp; + struct nzlist* ep; + struct nzlist* best = 0; + int i; + + for (sp = AOUT_RELOC(af, struct nzlist, LD_SYMBOL(af->dynamic)), + ep = (struct nzlist *) ((caddr_t) sp + LD_STABSZ(af->dynamic)); + sp < ep; sp++) { + if (sp->nz_name == 0) + continue; + if (off >= sp->nz_value) { + if (off - sp->nz_value < diff) { + diff = off - sp->nz_value; + best = sp; + if (diff == 0) + break; + } else if (off - sp->nz_value == diff) { + best = sp; + } + } + } + if (best == 0) + *diffp = off; + else + *diffp = diff; + *sym = (linker_sym_t) best; + + return 0; +} + #endif /* !__alpha__ */ |