/* shdrtab.c: Functions for handling the section header table entries. * * Copyright (C) 1999-2001 by Brian Raiter, under the GNU General * Public License. No warranty. See COPYING for details. */#include	<stdlib.h>#include	<ctype.h>#include	"gen.h"#include	"elf.h"#include	"outbasic.h"#include	"shdrtab.h"/* The list of section header names that are already defined. */static char const	       *shdrtaken[] = { "UNDEF", "ABS", "COMMON",						"LORESERVE", "HIRESERVE",						"LOPROC", "HIPROC" };/* The file's section header table. */static Elf32_Shdr const	       *shdrs = NULL;static int			shdrnum = 0;/* The file's section header string table. */static char const	       *shstrtab = NULL;/* The names of the sections used in the C enum. */static char		      **shdrnames = NULL;/* Returns the section header table entry for a given index. */Elf32_Shdr const *getshdr(int shndx){    if (shdrs && shndx > 0 && shndx < shdrnum)	return shdrs + shndx;    return NULL;}/* Returns the section's name from the section header string table. */char const *getshdrtruename(int shndx){    if (shstrtab && shndx > 0 && shndx < shdrnum)	return shstrtab + shdrs[shndx].sh_name;    return NULL;}/* Returns the enum name of a section for a given index. */char const *getshdrname(int shndx){    if (shdrnames && shndx > 0 && shndx < shdrnum)	return shdrnames[shndx];    return NULL;}/* Records the section header table and the section header string * table, and assigns each section a unique name. This function must * be called before any of the others in this module. */int enumsections(Elf32_Ehdr const *ehdr, Elf32_Shdr const *shdrsin,		 char const *shstrtabin){    char const *str;    int		conflict;    int		i, n;    shdrnum = ehdr->e_shnum;    shdrs = shdrsin;    shstrtab = shstrtabin;    if (!shdrs)	shdrnum = 0;    if (!shdrnum)	return TRUE;    i = shdrnum * sizeof(char*);    n = shdrs[ehdr->e_shstrndx].sh_size + shdrnum * 12;    xalloc(shdrnames, i + n);    *shdrnames = (char*)shdrnames + i;    **shdrnames = '\0';    for (i = 1 ; i < shdrnum ; ++i) {	shdrnames[i] = shdrnames[i - 1] + strlen(shdrnames[i - 1]) + 1;	str = shstrtab ? shstrtab + shdrs[i].sh_name : NULL;	if (str && *str) {	    if (*str == '.')		++str;	    conflict = FALSE;	    for (n = 0 ; n < (int)(sizeof shdrtaken / sizeof *shdrtaken) ; ++n)		if (!strcmp(str, shdrtaken[n])) {		    conflict = TRUE;		    break;		}	    strcpy(shdrnames[i], "SHN_");	    for (n = 4 ; *str ; ++n, ++str)		shdrnames[i][n] = isalnum(*str) ? toupper(*str) : '_';	    if (!conflict) {		for (n = 0 ; n < i ; ++n)		    if (!strcmp(shdrnames[i], shdrnames[n])) {			conflict = TRUE;			break;		}	    }	    if (conflict)		sprintf(shdrnames[i] + strlen(shdrnames[i]), "_%d", i);	} else	    sprintf(shdrnames[i], "SHN_%d", i);    }    return TRUE;}/* Output the C enum containing the section header names. Returns * FALSE if names are not available. */int outshdrnames(void){    int	i;    if (!shdrnum || !shdrnames)	return FALSE;    out("enum sections");    beginblock(TRUE);    outf("%s = 1", shdrnames[1]);    for (i = 2 ; i < shdrnum ; ++i)	out(shdrnames[i]);    out("SHN_COUNT");    endblock();    out("\n");    return TRUE;}