forked from Archive/PX4-Autopilot
328 lines
8.7 KiB
C
328 lines
8.7 KiB
C
/**********************************************************************
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* popt.c
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* P-Code Optimizer Main Logic
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*
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* Copyright (C) 2008 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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**********************************************************************/
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/**********************************************************************
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* Included Files
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**********************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "keywords.h"
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#include "podefs.h"
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#include "paslib.h"
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#include "pofflib.h"
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#include "pinsn.h"
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#include "popt.h"
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#include "psopt.h"
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#include "polocal.h"
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#include "pfopt.h"
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/**********************************************************************
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* Private Function Prototypes
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**********************************************************************/
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static void showUsage (const char *progname, int errcode);
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static void readPoffFile (const char *filename);
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static void pass1 (void);
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static void pass2 (void);
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static void pass3 (void);
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static void writePoffFile (const char *filename);
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/**********************************************************************
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* Global Variables
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**********************************************************************/
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/**********************************************************************
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* Private Variables
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**********************************************************************/
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static poffHandle_t poffHandle; /* Handle to POFF object */
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static int no_resolve = 0;
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/**********************************************************************
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* Global Functions
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**********************************************************************/
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/***********************************************************************/
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int main(int argc, char *argv[], char *envp[])
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{
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const char *outfilename;
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TRACE(stderr, "[main]");
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int option;
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/* Process command line argruments */
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while ((option = getopt(argc, argv, "rh")) > 0)
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{
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switch (option)
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{
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case 'r' :
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no_resolve++;
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break;
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case 'h' :
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showUsage(argv[0], 0);
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default:
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fprintf(stderr, "Unrecognized option\n");
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showUsage(argv[0], -1);
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}
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}
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/* Check for existence of filename argument */
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if (optind != argc - 1)
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{
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printf("Filename required at end of command line.\n");
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showUsage(argv[0], -1);
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} /* end if */
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/* Read the POFF file into memory */
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outfilename = argv[optind];
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readPoffFile(outfilename);
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/* Performs pass1 optimization */
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pass1();
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/* Performs pass2 optimization */
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insn_ResetOpCodeRead(poffHandle);
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pass2();
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if (!no_resolve)
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{
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/* Create final section offsets and relocation entries */
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insn_ResetOpCodeRead(poffHandle);
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pass3();
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}
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/* Write the POFF file */
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writePoffFile(outfilename);
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return 0;
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} /* End main */
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/**********************************************************************
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* Private Functions
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**********************************************************************/
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/***********************************************************************/
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static void showUsage(const char *progname, int errcode)
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{
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fprintf(stderr, "USAGE:\n");
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fprintf(stderr, " %s -h\n", progname);
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fprintf(stderr, " %s [-r] <poff-filename>\n", progname);
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fprintf(stderr, "WHERE:\n");
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fprintf(stderr, " -r: Disables label resolution (default: labels resolved)\n");
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fprintf(stderr, " -h: Shows this message\n");
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exit(errcode);
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}
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/***********************************************************************/
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static void readPoffFile(const char *filename)
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{
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char objname [FNAME_SIZE+1];
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FILE *objFile;
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int errcode;
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TRACE(stderr, "[readPoffFile]");
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/* Open the pass1 POFF object file -- Use .o1 extension */
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(void)extension(filename, "o1", objname, 1);
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if (!(objFile = fopen(objname, "rb")))
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{
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printf("Error Opening %s\n", objname);
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exit(1);
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} /* end if */
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/* Get a handle to a POFF input object */
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poffHandle = poffCreateHandle();
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if (!poffHandle)
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{
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printf("Could not get POFF handle\n");
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exit(1);
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} /* end if */
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/* Read the POFF file into memory */
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errcode = poffReadFile(poffHandle, objFile);
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if (errcode != 0)
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{
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printf("Could not read POFF file, errcode=0x%02x\n", errcode);
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exit(1);
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}
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/* Close the input file */
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fclose(objFile);
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} /* end pass1 */
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/***********************************************************************/
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static void pass1(void)
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{
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poffProgHandle_t poffProgHandle; /* Handle to temporary POFF object */
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TRACE(stderr, "[pass1]");
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/* Create a handle to a temporary object to store new POFF program
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* data.
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*/
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poffProgHandle = poffCreateProgHandle();
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if (!poffProgHandle)
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{
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printf("Could not get POFF handle\n");
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exit(1);
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} /* end if */
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/* Clean up garbage left from the wasteful string stack logic */
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stringStackOptimize(poffHandle, poffProgHandle);
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/* Replace the original program data with the new program data */
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poffReplaceProgData(poffHandle, poffProgHandle);
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/* Release the temporary POFF object */
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poffDestroyProgHandle(poffProgHandle);
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} /* end pass1 */
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/***********************************************************************/
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static void pass2(void)
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{
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poffProgHandle_t poffProgHandle; /* Handle to temporary POFF object */
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TRACE(stderr, "[pass2]");
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/* Create a handle to a temporary object to store new POFF program
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* data.
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*/
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poffProgHandle = poffCreateProgHandle();
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if (!poffProgHandle)
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{
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printf("Could not get POFF handle\n");
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exit(1);
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} /* end if */
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/* Perform Local Optimizatin Initialization */
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localOptimization(poffHandle, poffProgHandle);
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/* Replace the original program data with the new program data */
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poffReplaceProgData(poffHandle, poffProgHandle);
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/* Release the temporary POFF object */
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poffDestroyProgHandle(poffProgHandle);
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} /* end pass2 */
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/***********************************************************************/
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static void pass3 (void)
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{
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poffProgHandle_t poffProgHandle; /* Handle to temporary POFF object */
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TRACE(stderr, "[pass3]");
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/* Create a handle to a temporary object to store new POFF program
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* data.
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*/
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poffProgHandle = poffCreateProgHandle();
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if (!poffProgHandle)
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{
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printf("Could not get POFF handle\n");
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exit(1);
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} /* end if */
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/* Finalize program section, create relocation and line number
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* sections.
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*/
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optFinalize(poffHandle, poffProgHandle);
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/* Release the temporary POFF object */
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poffDestroyProgHandle(poffProgHandle);
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}
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/***********************************************************************/
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static void writePoffFile(const char *filename)
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{
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char optname [FNAME_SIZE+1];
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FILE *optFile;
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TRACE(stderr, "[writePoffFile]");
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/* Open optimized p-code file -- Use .o extension */
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(void)extension(filename, "o", optname, 1);
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if (!(optFile = fopen(optname, "wb")))
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{
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printf("Error Opening %s\n", optname);
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exit(1);
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} /* end if */
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/* Then write the new POFF file */
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poffWriteFile(poffHandle, optFile);
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/* Destroy the POFF object */
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poffDestroyHandle(poffHandle);
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/* Close the files used on writePoffFile */
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(void)fclose(optFile);
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} /* end writePoffFile */
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/***********************************************************************/
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