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authorpeter <peter@FreeBSD.org>2000-01-11 13:29:10 +0000
committerpeter <peter@FreeBSD.org>2000-01-11 13:29:10 +0000
commitf92401f3262171982f23defdf28dcea3985a3cef (patch)
tree82e5395142c47d201447881f717e9adaf3cdc191 /sys/ddb
parenta6ad092de6eabcb290ba6d77fca07aa407f77e20 (diff)
downloadFreeBSD-src-f92401f3262171982f23defdf28dcea3985a3cef.zip
FreeBSD-src-f92401f3262171982f23defdf28dcea3985a3cef.tar.gz
Unused file. This (NetBSD derived) file was obsoleted by kld.
Diffstat (limited to 'sys/ddb')
-rw-r--r--sys/ddb/db_elf.c381
1 files changed, 0 insertions, 381 deletions
diff --git a/sys/ddb/db_elf.c b/sys/ddb/db_elf.c
deleted file mode 100644
index b4fd53d..0000000
--- a/sys/ddb/db_elf.c
+++ /dev/null
@@ -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
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