mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-11-30 08:43:23 +00:00
Unused file. This (NetBSD derived) file was obsoleted by kld.
This commit is contained in:
Peter Wemm
parent
63aad530bc
commit
5dfaebe1c3
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=55819
381
sys/ddb/db_elf.c
381
sys/ddb/db_elf.c
@ -1,381 +0,0 @@
|
||||
/* $FreeBSD$ */
|
||||
/* $NetBSD: db_elf.c,v 1.4 1998/05/03 18:49:54 thorpej Exp $ */
|
||||
|
||||
/*-
|
||||
* Copyright (c) 1997 The NetBSD Foundation, Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* This code is derived from software contributed to The NetBSD Foundation
|
||||
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
|
||||
* NASA Ames Research Center.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. All advertising materials mentioning features or use of this software
|
||||
* must display the following acknowledgement:
|
||||
* This product includes software developed by the NetBSD
|
||||
* Foundation, Inc. and its contributors.
|
||||
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
||||
* contributors may be used to endorse or promote products derived
|
||||
* from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
||||
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
||||
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
||||
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#if defined(__ELF__) && defined(__alpha__)
|
||||
|
||||
#include "opt_ddb.h"
|
||||
|
||||
#include <sys/types.h>
|
||||
#include <sys/param.h>
|
||||
#include <sys/systm.h>
|
||||
#include <sys/proc.h>
|
||||
|
||||
#include <machine/db_machdep.h>
|
||||
|
||||
#include <ddb/db_sym.h>
|
||||
#include <ddb/db_output.h>
|
||||
|
||||
#include <machine/elf.h>
|
||||
|
||||
static char *db_elf_find_strtab __P((db_symtab_t *));
|
||||
|
||||
#define STAB_TO_SYMSTART(stab) ((Elf_Sym *)((stab)->start))
|
||||
#define STAB_TO_SYMEND(stab) ((Elf_Sym *)((stab)->end))
|
||||
#define STAB_TO_EHDR(stab) ((Elf_Ehdr *)((stab)->private))
|
||||
#define STAB_TO_SHDR(stab, e) ((Elf_Shdr *)((stab)->private + (e)->e_shoff))
|
||||
|
||||
void X_db_sym_init(void *symtab, void *esymtab, char *name);
|
||||
|
||||
/*
|
||||
* Find the symbol table and strings; tell ddb about them.
|
||||
*/
|
||||
void
|
||||
X_db_sym_init(symtab, esymtab, name)
|
||||
void *symtab; /* pointer to start of symbol table */
|
||||
void *esymtab; /* pointer to end of string table,
|
||||
for checking - rounded up to integer
|
||||
boundary */
|
||||
char *name;
|
||||
{
|
||||
Elf_Ehdr *elf;
|
||||
Elf_Shdr *shp;
|
||||
Elf_Sym *symp, *symtab_start, *symtab_end;
|
||||
char *strtab_start, *strtab_end;
|
||||
int i;
|
||||
|
||||
if (ALIGNED_POINTER(symtab, long) == 0) {
|
||||
printf("DDB: bad symbol table start address %p\n", symtab);
|
||||
return;
|
||||
}
|
||||
|
||||
symtab_start = symtab_end = NULL;
|
||||
strtab_start = strtab_end = NULL;
|
||||
|
||||
/*
|
||||
* The format of the symbols loaded by the boot program is:
|
||||
*
|
||||
* Elf exec header
|
||||
* first section header
|
||||
* . . .
|
||||
* . . .
|
||||
* last section header
|
||||
* first symbol or string table section
|
||||
* . . .
|
||||
* . . .
|
||||
* last symbol or string table section
|
||||
*/
|
||||
|
||||
/*
|
||||
* Validate the Elf header.
|
||||
*/
|
||||
elf = (Elf_Ehdr *)symtab;
|
||||
if (elf->e_ident[EI_MAG0] != ELFMAG0
|
||||
|| elf->e_ident[EI_MAG1] != ELFMAG1
|
||||
|| elf->e_ident[EI_MAG2] != ELFMAG2
|
||||
|| elf->e_ident[EI_MAG3] != ELFMAG3)
|
||||
goto badheader;
|
||||
|
||||
if (!ELF_MACHINE_OK(elf->e_machine))
|
||||
goto badheader;
|
||||
|
||||
/*
|
||||
* We need to avoid the section header string table (small string
|
||||
* table which names the sections). We do this by assuming that
|
||||
* the following two conditions will be true:
|
||||
*
|
||||
* (1) .shstrtab will be smaller than one page.
|
||||
* (2) .strtab will be larger than one page.
|
||||
*
|
||||
* When we encounter what we think is the .shstrtab, we change
|
||||
* its section type Elf_sht_null so that it will be ignored
|
||||
* later.
|
||||
*/
|
||||
shp = (Elf_Shdr *)((char*)symtab + elf->e_shoff);
|
||||
for (i = 0; i < elf->e_shnum; i++) {
|
||||
if (shp[i].sh_addr || i == elf->e_shstrndx)
|
||||
continue;
|
||||
switch (shp[i].sh_type) {
|
||||
case SHT_STRTAB:
|
||||
if (shp[i].sh_size < PAGE_SIZE) {
|
||||
shp[i].sh_type = SHT_NULL;
|
||||
continue;
|
||||
}
|
||||
if (strtab_start != NULL)
|
||||
goto multiple_strtab;
|
||||
strtab_start = (char *)symtab + shp[i].sh_offset;
|
||||
strtab_end = (char *)symtab + shp[i].sh_offset +
|
||||
shp[i].sh_size;
|
||||
break;
|
||||
|
||||
case SHT_SYMTAB:
|
||||
if (symtab_start != NULL)
|
||||
goto multiple_symtab;
|
||||
symtab_start = (Elf_Sym *)((char*)symtab + shp[i].sh_offset);
|
||||
symtab_end = (Elf_Sym *)((char*)symtab + shp[i].sh_offset +
|
||||
shp[i].sh_size);
|
||||
break;
|
||||
|
||||
default:
|
||||
/* Ignore all other sections. */
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Now, sanity check the symbols against the string table.
|
||||
*/
|
||||
if (symtab_start == NULL || strtab_start == NULL ||
|
||||
ALIGNED_POINTER(symtab_start, long) == 0 ||
|
||||
ALIGNED_POINTER(strtab_start, long) == 0)
|
||||
goto badheader;
|
||||
for (symp = symtab_start; symp < symtab_end; symp++)
|
||||
if (symp->st_name + strtab_start > strtab_end)
|
||||
goto badheader;
|
||||
|
||||
/*
|
||||
* Link the symbol table into the debugger.
|
||||
*/
|
||||
db_add_symbol_table((char *)symtab_start,
|
||||
(char *)symtab_end, name, (char *)symtab);
|
||||
printf("[ preserving %lu bytes of %s symbol table ]\n",
|
||||
(u_long)roundup(((char*)esymtab - (char*)symtab), sizeof(u_long)), name);
|
||||
return;
|
||||
|
||||
badheader:
|
||||
printf("[ %s symbol table not valid ]\n", name);
|
||||
return;
|
||||
|
||||
multiple_strtab:
|
||||
printf("[ %s has multiple string tables ]\n", name);
|
||||
return;
|
||||
|
||||
multiple_symtab:
|
||||
printf("[ %s has multiple symbol tables ]\n", name);
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
* Internal helper function - return a pointer to the string table
|
||||
* for the current symbol table.
|
||||
*/
|
||||
static char *
|
||||
db_elf_find_strtab(stab)
|
||||
db_symtab_t *stab;
|
||||
{
|
||||
Elf_Ehdr *elf = STAB_TO_EHDR(stab);
|
||||
Elf_Shdr *shp = STAB_TO_SHDR(stab, elf);
|
||||
int i;
|
||||
|
||||
for (i = 0; i < elf->e_shnum; i++) {
|
||||
if (shp[i].sh_type == SHT_STRTAB
|
||||
&& !shp[i].sh_addr && i != elf->e_shstrndx)
|
||||
return (stab->private + shp[i].sh_offset);
|
||||
}
|
||||
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
/*
|
||||
* Lookup the symbol with the given name.
|
||||
*/
|
||||
db_sym_t
|
||||
X_db_lookup(stab, symstr)
|
||||
db_symtab_t *stab;
|
||||
const char *symstr;
|
||||
{
|
||||
Elf_Sym *symp, *symtab_start, *symtab_end;
|
||||
char *strtab;
|
||||
|
||||
symtab_start = STAB_TO_SYMSTART(stab);
|
||||
symtab_end = STAB_TO_SYMEND(stab);
|
||||
|
||||
strtab = db_elf_find_strtab(stab);
|
||||
if (strtab == NULL)
|
||||
return ((db_sym_t)0);
|
||||
|
||||
for (symp = symtab_start; symp < symtab_end; symp++) {
|
||||
if (symp->st_name != 0 &&
|
||||
db_eqname(strtab + symp->st_name, symstr, 0))
|
||||
return ((db_sym_t)symp);
|
||||
}
|
||||
|
||||
return ((db_sym_t)0);
|
||||
}
|
||||
|
||||
/*
|
||||
* Search for the symbol with the given address (matching within the
|
||||
* provided threshold).
|
||||
*/
|
||||
db_sym_t
|
||||
X_db_search_symbol(symtab, off, strategy, diffp)
|
||||
db_symtab_t *symtab;
|
||||
db_addr_t off;
|
||||
db_strategy_t strategy;
|
||||
db_expr_t *diffp; /* in/out */
|
||||
{
|
||||
Elf_Sym *rsymp, *symp, *symtab_start, *symtab_end;
|
||||
db_expr_t diff = *diffp;
|
||||
|
||||
symtab_start = STAB_TO_SYMSTART(symtab);
|
||||
symtab_end = STAB_TO_SYMEND(symtab);
|
||||
|
||||
rsymp = NULL;
|
||||
|
||||
for (symp = symtab_start; symp < symtab_end; symp++) {
|
||||
if (symp->st_name == 0)
|
||||
continue;
|
||||
if (ELF_ST_TYPE(symp->st_info) != STT_OBJECT &&
|
||||
ELF_ST_TYPE(symp->st_info) != STT_FUNC)
|
||||
continue;
|
||||
|
||||
if (off >= symp->st_value) {
|
||||
if ((off - symp->st_value) < diff) {
|
||||
diff = off - symp->st_value;
|
||||
rsymp = symp;
|
||||
if (diff == 0) {
|
||||
if (strategy == DB_STGY_PROC &&
|
||||
ELF_ST_TYPE(symp->st_info) ==
|
||||
STT_FUNC &&
|
||||
ELF_ST_BIND(symp->st_info) !=
|
||||
STB_LOCAL)
|
||||
break;
|
||||
if (strategy == DB_STGY_ANY &&
|
||||
ELF_ST_BIND(symp->st_info) !=
|
||||
STB_LOCAL)
|
||||
break;
|
||||
}
|
||||
} else if ((off - symp->st_value) == diff) {
|
||||
if (rsymp == NULL)
|
||||
rsymp = symp;
|
||||
else if (ELF_ST_BIND(rsymp->st_info) ==
|
||||
STB_LOCAL &&
|
||||
ELF_ST_BIND(symp->st_info) !=
|
||||
STB_LOCAL) {
|
||||
/* pick the external symbol */
|
||||
rsymp = symp;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (rsymp == NULL)
|
||||
*diffp = off;
|
||||
else
|
||||
*diffp = diff;
|
||||
|
||||
return ((db_sym_t)rsymp);
|
||||
}
|
||||
|
||||
/*
|
||||
* Return the name and value for a symbol.
|
||||
*/
|
||||
void
|
||||
X_db_symbol_values(symtab, sym, namep, valuep)
|
||||
db_symtab_t *symtab;
|
||||
db_sym_t sym;
|
||||
const char **namep;
|
||||
db_expr_t *valuep;
|
||||
{
|
||||
Elf_Sym *symp = (Elf_Sym *)sym;
|
||||
char *strtab;
|
||||
|
||||
if (namep) {
|
||||
strtab = db_elf_find_strtab(symtab);
|
||||
if (strtab == NULL)
|
||||
*namep = NULL;
|
||||
else
|
||||
*namep = strtab + symp->st_name;
|
||||
}
|
||||
|
||||
if (valuep)
|
||||
*valuep = symp->st_value;
|
||||
}
|
||||
|
||||
/*
|
||||
* Return the file and line number of the current program counter
|
||||
* if we can find the appropriate debugging symbol.
|
||||
*/
|
||||
boolean_t
|
||||
X_db_line_at_pc(symtab, cursym, filename, linenum, off)
|
||||
db_symtab_t *symtab;
|
||||
db_sym_t cursym;
|
||||
char **filename;
|
||||
int *linenum;
|
||||
db_expr_t off;
|
||||
{
|
||||
|
||||
/*
|
||||
* XXX We don't support this (yet).
|
||||
*/
|
||||
return (FALSE);
|
||||
}
|
||||
|
||||
/*
|
||||
* Returns the number of arguments to a function and their
|
||||
* names if we can find the appropriate debugging symbol.
|
||||
*/
|
||||
boolean_t
|
||||
X_db_sym_numargs(symtab, cursym, nargp, argnamep)
|
||||
db_symtab_t *symtab;
|
||||
c_db_sym_t cursym;
|
||||
int *nargp;
|
||||
char **argnamep;
|
||||
{
|
||||
|
||||
/*
|
||||
* XXX We don't support this (yet).
|
||||
*/
|
||||
return (FALSE);
|
||||
}
|
||||
|
||||
/*
|
||||
* Initialization routine for Elf files.
|
||||
*/
|
||||
extern void *ksym_start, *ksym_end;
|
||||
|
||||
void
|
||||
kdb_init(void)
|
||||
{
|
||||
|
||||
if (ksym_end > ksym_start)
|
||||
X_db_sym_init(ksym_start, ksym_end, "kernel");
|
||||
}
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user