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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* File: symintLoad.c
* Date: 12/15/88
*
* This file provides code to build the profiling symbol array
* (array of PROF_SYMBOL). This array contains all of the
* symbol table information plus selected debug information for
* each file and each function that has a coverage array.
*
* The symbol table contains entries for every file, every
* function, and every coverage array. The debug information
* has corresponding entries except that there are no entries
* for the coverage arrays. (This may change later.)
*
* The algorithm for building the profiling symbol array
* consists of scanning the symbol table for file, function,
* and coverage array entries and building an entry for each.
* The construction of an entry is constrained by the
* following factors:
*
* - An entry is built for every file.
*
* - An entry is built for a function only if there
* is a corresponding coverage array for the function.
*
* - Entries must be ordered in the sense that each
* non-file entry points to its owner file and each
* file entry points to the next file (or null).
*
* - The assembler specification (see C Issue 5 3B2
* Assembler System Test Specification by Howe, p. 28)
* states that all local symbols follow their file
* symbol in the symbol table. This allows us to relate
* a function and its coverage array to the file that
* contains it.
*
* - For each symbol included in the profiling symbol
* array, all corresponding symbol table information must
* be present together with selected debug information.
* Therefore, the correspondence between a symbol table
* entry and a debug entry must be established.
*
* - Although duplicate (static) function names may appear,
* the names are unique within a given file. Also, the
* value (address) of each function is included in both
* the symbol table information and the debug information.
* This provides a verifable correspondence between these
* information sets.
*
*/
#include "string.h"
#include "symint.h"
#include "debug.h"
static PROF_FILE *profPtr;
/* LINTED: set but not used */
static int prstsym_size; /* size of a symbol table symbol */
static PROF_SYMBOL *prsym_list_p = 0; /* the list to return. */
/*
* _symintLoad(proffilePtr)
* proffilePtr - PROF_FILE pointer returned by _symintOpen().
*
* returns PROF_SYMBOL * - pointer to the malloc-ed array of
* symbol information entries, or
* NULL if fails.
*
*
* This routine builds the interface data structure from the data
* already loaded during _symintOpen().
*
* Prof:
*
* 1. Allocate a duplicate copy of the symbol table
* data. (For Prof, a PROF_SYMBOL is just
* a structure containing an Elf32_Sym!)
*
* 2. Set internal parameters to reflect this.
*
*
* Problems are dealt with by issuing an _err_exit().
*
*/
PROF_SYMBOL *
_symintLoad(PROF_FILE *proffilePtr)
{
Elf_Data *symdat_pri_p;
Elf_Data *symdat_aux_p;
PROF_SYMBOL *symlist;
DEBUG_LOC("_symintLoad: top");
profPtr = proffilePtr;
/*
* sanity checks.
*/
DEBUG_EXP(printf("profPtr = %x\n", profPtr));
DEBUG_EXP(printf("profPtr->pf_symdat_p = %x\n",
profPtr->pf_symdat_pri_p));
DEBUG_EXP(printf("profPtr->pf_nstsyms = %x\n", profPtr->pf_nstsyms));
assert(profPtr != 0);
assert(profPtr->pf_symdat_pri_p != 0);
assert(profPtr->pf_nstsyms != 0);
symdat_pri_p = profPtr->pf_symdat_pri_p;
symdat_aux_p = profPtr->pf_symdat_aux_p;
DEBUG_EXP(printf("symdat_pri_p->d_size = %x\n", symdat_pri_p->d_size));
prstsym_size = (symdat_pri_p->d_size / profPtr->pf_nstsyms);
DEBUG_EXP(printf("_symintLoad: prstsym_size = %d\n",
prstsym_size));
/*
* alloc a new copy of the array, and
* do a bit-wise copy since the structures
* ARE THE SAME SIZE & (effectively) HAVE THE SAME FIELDS!
* Set the descriptive `parameters' accordingly.
*
* If there is an auxiliary symbol table (.SUNW_ldynsym) augmenting
* the dynamic symbol table (.dynsym), then we copy both tables
* into our copy, with the auxiliary coming first.
*
* (We'll take a copy, to simplify the 'Drop' logic.)
*/
{
size_t st_size; /* size of symbol table data */
st_size = symdat_pri_p->d_size;
if (profPtr->pf_nstsyms_aux != 0)
st_size += symdat_aux_p->d_size;
NO_DEBUG_LOC("_symintLoad: before malloc for symbol list (PROF)");
prsym_list_p = symlist = (PROF_SYMBOL *)_Malloc(st_size, 1);
NO_DEBUG_LOC("_symintLoad: after malloc for symbol list (PROF)");
if (profPtr->pf_nstsyms_aux > 0) {
NO_DEBUG_LOC("_symintLoad: before memcpy for "
"auxiliary symbol list (PROF)");
(void) memcpy(symlist, symdat_aux_p->d_buf,
symdat_aux_p->d_size);
symlist += profPtr->pf_nstsyms_aux;
}
NO_DEBUG_LOC("_symintLoad: before memcpy for symbol list (PROF)");
(void) memcpy(symlist, symdat_pri_p->d_buf, symdat_pri_p->d_size);
profPtr->pf_nsyms = profPtr->pf_nstsyms;
}
DEBUG_LOC("_symintLoad: bottom");
return (prsym_list_p);
}
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