| 1 | //
|
|---|
| 2 | // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
|
|---|
| 3 | //
|
|---|
| 4 | // The contents of this file are covered under the licence agreement in the
|
|---|
| 5 | // file "LICENCE" distributed with Cforall.
|
|---|
| 6 | //
|
|---|
| 7 | // as.c -- map assembler file, scan for debug information. If found, expand file by one character and insert Cforall
|
|---|
| 8 | // language code on the N line from the start of the debug information.
|
|---|
| 9 | //
|
|---|
| 10 | // Author : Peter A. Buhr
|
|---|
| 11 | // Created On : Wed Aug 1 10:49:42 2018
|
|---|
| 12 | // Last Modified By : Peter A. Buhr
|
|---|
| 13 | // Last Modified On : Sat Sep 8 08:40:16 2018
|
|---|
| 14 | // Update Count : 97
|
|---|
| 15 | //
|
|---|
| 16 |
|
|---|
| 17 | #include <cstdio> // perror
|
|---|
| 18 | #include <cstdlib> // exit
|
|---|
| 19 | #include <fcntl.h> // open
|
|---|
| 20 | #include <unistd.h>
|
|---|
| 21 | #include <sys/stat.h>
|
|---|
| 22 | #include <sys/mman.h> // mmap
|
|---|
| 23 | #include <string.h>
|
|---|
| 24 |
|
|---|
| 25 | //#define __DEBUG_H__
|
|---|
| 26 |
|
|---|
| 27 | #ifdef __DEBUG_H__
|
|---|
| 28 | #include <iostream>
|
|---|
| 29 | using namespace std;
|
|---|
| 30 | #endif // __DEBUG_H__
|
|---|
| 31 |
|
|---|
| 32 | int main( const int argc, const char * argv[] ) {
|
|---|
| 33 | #ifdef __DEBUG_H__
|
|---|
| 34 | for ( int i = 0; i < argc; i += 1 ) {
|
|---|
| 35 | cerr << argv[i] << endl;
|
|---|
| 36 | } // for
|
|---|
| 37 | #endif // __DEBUG_H__
|
|---|
| 38 |
|
|---|
| 39 | int fd = open( argv[argc - 1], O_RDWR );
|
|---|
| 40 | if ( fd < 0 ) { perror( "open" ); exit( EXIT_FAILURE ); };
|
|---|
| 41 |
|
|---|
| 42 | struct stat mystat = {};
|
|---|
| 43 | if ( fstat( fd, &mystat ) ) { perror( "fstat" ); exit( EXIT_FAILURE ); };
|
|---|
| 44 | off_t size = mystat.st_size;
|
|---|
| 45 |
|
|---|
| 46 | if ( size ) { // cannot map 0 sized file
|
|---|
| 47 | char * start = (char *)mmap( NULL, size + 2, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0 );
|
|---|
| 48 | if ( start == (void *)-1 ) { perror( "mmap" ); exit( EXIT_FAILURE ); };
|
|---|
| 49 |
|
|---|
| 50 | if ( char * cursor = strstr( start, ".Ldebug_info0:" ) ) { // debug information ?
|
|---|
| 51 | // Expand file by one byte to hold 2 character Cforall language code.
|
|---|
| 52 | if ( ftruncate( fd, size + 1 ) ) { perror( "ftruncate" ); exit( EXIT_FAILURE ); };
|
|---|
| 53 |
|
|---|
| 54 | for ( int i = 0; i < 8; i += 1 ) { // move N (magic) lines forward
|
|---|
| 55 | cursor = strstr( cursor, "\n" ) + 1;
|
|---|
| 56 | } // for
|
|---|
| 57 |
|
|---|
| 58 | cursor -= 2; // backup over "c\n" language value
|
|---|
| 59 | if ( *(cursor - 1) != 'x' ) { fprintf( stderr, "invalid C language code\n" ); exit( EXIT_FAILURE ); };
|
|---|
| 60 |
|
|---|
| 61 | memmove( cursor + 2, cursor + 1, start + size - cursor - 1 ); // move remaining text 1 character right
|
|---|
| 62 |
|
|---|
| 63 | *(cursor) = '2'; // replace C language value with CFA
|
|---|
| 64 | *(cursor + 1) = '5';
|
|---|
| 65 | } // if
|
|---|
| 66 |
|
|---|
| 67 | if ( munmap( start, size + 2 ) ) { perror( "munmap" ); exit( EXIT_FAILURE ); }; // update on disk
|
|---|
| 68 | } // if
|
|---|
| 69 |
|
|---|
| 70 | argv[0] = "as";
|
|---|
| 71 | execvp( argv[0], (char * const *)argv ); // should not return
|
|---|
| 72 | perror( "CFA Translator error: cpp level, execvp" );
|
|---|
| 73 | exit( EXIT_FAILURE ); // tell gcc not to go any further
|
|---|
| 74 | } // main
|
|---|
| 75 |
|
|---|
| 76 | // Local Variables: //
|
|---|
| 77 | // tab-width: 4 //
|
|---|
| 78 | // mode: c++ //
|
|---|
| 79 | // compile-command: "g++ -Wall -Wextra as.c -o as" //
|
|---|
| 80 | // End: //
|
|---|
