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author | peter <peter@FreeBSD.org> | 2000-01-11 13:29:10 +0000 |
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committer | peter <peter@FreeBSD.org> | 2000-01-11 13:29:10 +0000 |
commit | f92401f3262171982f23defdf28dcea3985a3cef (patch) | |
tree | 82e5395142c47d201447881f717e9adaf3cdc191 /sys/ddb/db_elf.c | |
parent | a6ad092de6eabcb290ba6d77fca07aa407f77e20 (diff) | |
download | FreeBSD-src-f92401f3262171982f23defdf28dcea3985a3cef.zip FreeBSD-src-f92401f3262171982f23defdf28dcea3985a3cef.tar.gz |
Unused file. This (NetBSD derived) file was obsoleted by kld.
Diffstat (limited to 'sys/ddb/db_elf.c')
-rw-r--r-- | sys/ddb/db_elf.c | 381 |
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 |