/*- * Copyright (c) 1983, 1993 * The Regents of the University of California. All rights reserved. * * 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. * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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 0 /* From: */ #ifndef lint static char sccsid[] = "@(#)gprof.c 8.1 (Berkeley) 6/6/93"; #endif /* not lint */ #endif #include __FBSDID("$FreeBSD$"); #include #include #include #include #include "gprof.h" static void getstrtab(FILE *, const char *); static void getsymtab(FILE *, const char *); static void gettextspace(FILE *); static bool funcsymbol(struct nlist *); static char *strtab; /* string table in core */ static long ssiz; /* size of the string table */ static struct exec xbuf; /* exec header of a.out */ /* Things which get -E excluded by default. */ static char *excludes[] = { "mcount", "__mcleanup", NULL }; /* * Set up string and symbol tables from a.out. * and optionally the text space. * On return symbol table is sorted by value. * * Returns 0 on success, -1 on failure. */ int aout_getnfile(const char *filename, char ***defaultEs) { FILE *nfile; nfile = fopen( filename ,"r"); if (nfile == NULL) err( 1 , "%s", filename ); fread(&xbuf, 1, sizeof(xbuf), nfile); if (N_BADMAG(xbuf)) { fclose(nfile); return -1; } getstrtab(nfile, filename); getsymtab(nfile, filename); gettextspace( nfile ); fclose(nfile); # ifdef DEBUG if ( debug & AOUTDEBUG ) { register int j; for (j = 0; j < nname; j++){ printf("[getnfile] 0X%08lx\t%s\n", nl[j].value, nl[j].name); } } # endif /* DEBUG */ *defaultEs = excludes; return 0; } static void getstrtab(FILE *nfile, const char *filename) { fseek(nfile, (long)(N_SYMOFF(xbuf) + xbuf.a_syms), 0); if (fread(&ssiz, sizeof (ssiz), 1, nfile) == 0) errx( 1 , "%s: no string table (old format?)" , filename ); strtab = calloc(ssiz, 1); if (strtab == NULL) errx( 1 , "%s: no room for %ld bytes of string table", filename , ssiz); if (fread(strtab+sizeof(ssiz), ssiz-sizeof(ssiz), 1, nfile) != 1) errx( 1 , "%s: error reading string table" , filename ); } /* * Read in symbol table */ static void getsymtab(FILE *nfile, const char *filename) { register long i; int askfor; struct nlist nbuf; /* pass1 - count symbols */ fseek(nfile, (long)N_SYMOFF(xbuf), 0); nname = 0; for (i = xbuf.a_syms; i > 0; i -= sizeof(struct nlist)) { fread(&nbuf, sizeof(nbuf), 1, nfile); if ( ! funcsymbol( &nbuf ) ) { continue; } nname++; } if (nname == 0) errx( 1 , "%s: no symbols" , filename ); askfor = nname + 1; nl = (nltype *) calloc( askfor , sizeof(nltype) ); if (nl == 0) errx( 1 , "no room for %zu bytes of symbol table" , askfor * sizeof(nltype) ); /* pass2 - read symbols */ fseek(nfile, (long)N_SYMOFF(xbuf), 0); npe = nl; nname = 0; for (i = xbuf.a_syms; i > 0; i -= sizeof(struct nlist)) { fread(&nbuf, sizeof(nbuf), 1, nfile); if ( ! funcsymbol( &nbuf ) ) { # ifdef DEBUG if ( debug & AOUTDEBUG ) { printf( "[getsymtab] rejecting: 0x%x %s\n" , nbuf.n_type , strtab + nbuf.n_un.n_strx ); } # endif /* DEBUG */ continue; } npe->value = nbuf.n_value; npe->name = strtab+nbuf.n_un.n_strx; # ifdef DEBUG if ( debug & AOUTDEBUG ) { printf( "[getsymtab] %d %s 0x%08lx\n" , nname , npe -> name , npe -> value ); } # endif /* DEBUG */ npe++; nname++; } npe->value = -1; } /* * read in the text space of an a.out file */ static void gettextspace(FILE *nfile) { textspace = (u_char *) malloc( xbuf.a_text ); if ( textspace == 0 ) { warnx("no room for %u bytes of text space: can't do -c" , xbuf.a_text ); return; } (void) fseek( nfile , N_TXTOFF( xbuf ) , 0 ); if ( fread( textspace , 1 , xbuf.a_text , nfile ) != xbuf.a_text ) { warnx("couldn't read text space: can't do -c"); free( textspace ); textspace = 0; return; } } static bool funcsymbol(struct nlist *nlistp) { char *name, c; /* * must be a text symbol, * and static text symbols don't qualify if aflag set. */ if ( ! ( ( nlistp -> n_type == ( N_TEXT | N_EXT ) ) || ( ( nlistp -> n_type == N_TEXT ) && ( aflag == 0 ) ) ) ) { return FALSE; } /* * name must start with an underscore if uflag is set. * can't have any `funny' characters in name, * where `funny' means `.' (.o file names) * need to make an exception for sparc .mul & co. * perhaps we should just drop this code entirely... */ name = strtab + nlistp -> n_un.n_strx; if ( uflag && *name != '_' ) return FALSE; #ifdef sparc if ( *name == '.' ) { char *p = name + 1; if ( *p == 'u' ) p++; if ( strcmp ( p, "mul" ) == 0 || strcmp ( p, "div" ) == 0 || strcmp ( p, "rem" ) == 0 ) return TRUE; } #endif while ( (c = *name++) ) { if ( c == '.' ) { return FALSE; } } return TRUE; }