Lots of makefile corrections, improved build and toolchain instructions, added elf2cpe converter, fixed typo in plasma_tbl.h of n00bdemo example

1 files changed, 251 insertions, 0 deletions

diff --git a/tools/util/elf2cpe.c b/tools/util/elf2cpe.c
new file mode 100644
index 0000000..4379f4a
--- /dev/null
+++ b/tools/util/elf2cpe.c
@@ -0,0 +1,251 @@
+#include <stdio.h>
+#include <string.h>
+#include <malloc.h>
+#include "elf.h"
+
+#define	MAX_prg_entry_count	128
+
+#ifndef false
+#define false	0
+#endif
+
+#ifndef true
+#define true	1
+#endif
+
+char *in_file = NULL;
+char *out_file = NULL;
+
+int quiet;
+
+int copydata( FILE *in, FILE *out, int len )
+{
+	char buff[8192];
+	int i,readlen;
+	
+	while( len > 0 )
+	{
+		readlen = len;
+		if( readlen > 8192 )
+		{
+			readlen = 8192;
+		}
+		
+		i = fread( buff, 1, readlen, in );
+		fwrite( buff, 1, i, out );
+		
+		if( i < readlen )
+		{
+			break;
+		}
+		len -= readlen;
+	}
+	
+	return( 0 );
+	
+} /* copydata */
+
+int convertELF( void )
+{
+	ELF_HEADER head;
+	PRG_HEADER prg_heads[MAX_prg_entry_count];
+	
+	int i;
+	char *output_name;
+	
+	FILE *in_fp;
+	FILE *out_fp;
+	
+	/* Generate output filename if no output is specified */
+	if( out_file )
+	{
+		output_name = out_file;
+	}
+	else
+	{
+		char	*ptr;
+
+		output_name = strdup( in_file );
+
+		ptr = &output_name[strlen(output_name)];
+		while (ptr != output_name)
+		{
+			if (*ptr == '.')
+				break;
+			else
+				ptr--;
+		}
+
+		if( ptr != output_name )
+		{
+			strcpy( ptr, ".cpe" );
+		}
+		else
+		{
+			strcat( ptr, ".cpe" );
+		}
+	}
+	
+	if( !out_file )
+	{
+		free( output_name );
+	}
+	
+	if( !( in_fp = fopen( in_file, "rb" ) ) )
+	{
+		printf( "Cannot open input file.\n" );
+		return( -1 );
+	}
+	
+	/* read ELF header */
+	fread( &head, 1, sizeof(head), in_fp );
+	
+	/* test header to make sure it is valid */
+	if( head.magic != 0x464c457f )
+	{
+		printf( "File is not an ELF file.\n" );
+		fclose( in_fp );
+		return( -1 );
+	}
+
+	if( head.type != 2 )
+	{
+		printf( "Only executable ELF files are supported.\n" );
+		fclose( in_fp );
+		return( -1 );
+	}
+
+	if( head.instr_set != 8 )
+	{
+		printf( "ELF file is not a MIPS binary.\n" );
+		fclose( in_fp );
+		return( -1 );
+	}
+
+	if( head.word_size != 1 )
+	{
+		printf( "Only 32-bit ELF files are supported.\n" );
+		fclose( in_fp );
+		return( -1 );
+	}
+
+	if( head.endianness != 1 )
+	{
+		printf( "Only little endian ELF files are supported.\n" );
+		fclose( in_fp );
+		return( -1 );
+	}
+	
+	/* read program headers */
+	fseek( in_fp, head.prg_head_pos, SEEK_SET );
+	fread( prg_heads, sizeof( PRG_HEADER ), head.prg_entry_count, in_fp );
+	
+	if( !quiet )
+	{
+		printf( "pc:%08x\n", head.prg_entry_addr );
+	}
+	
+	/* create the CPE file */
+	printf( "%s\n", output_name );
+	if( !( out_fp = fopen( output_name, "wb" ) ) )
+	{
+		printf( "Cannot create output file.\n" );
+		return( -1 );
+	}
+	
+	/* create file header */
+	fputs( "CPE", out_fp );
+	fputc( 0x01, out_fp );
+	
+	/* select unit 0 */
+	fputc( 0x08, out_fp );	/* chunk ID */
+	fputc( 0x00, out_fp );	/* unit number */
+	
+	/* set entrypoint */
+	fputc( 0x03, out_fp );	/* chunk ID */
+	fputc( 0x90, out_fp );	/* entry point type */
+	fputc( 0x00, out_fp );
+	fwrite( &head.prg_entry_addr, 1, 4, out_fp );
+	
+	/* copy the program chunks */
+	for( i=0; i<head.prg_entry_count; i++ )
+	{
+		if( prg_heads[i].flags == 4 )
+		{
+			continue;
+		}
+		
+		/* seek to location of program chunk */
+		fseek( in_fp, prg_heads[i].p_offset, SEEK_SET );
+		
+		/* create load chunk */
+		fputc( 0x01, out_fp );	/* chunk ID */
+		fwrite( &prg_heads[i].p_vaddr, 1, 4, out_fp );	/* load address */
+		fwrite( &prg_heads[i].p_filesz, 1, 4, out_fp );	/* load length */
+		
+		/* copy the chunk data */
+		copydata( in_fp, out_fp, prg_heads[i].p_filesz );
+	}	
+	
+	/* end of file chunk */
+	fputc( 0x00, out_fp );
+	
+	/* close files */
+	fclose( in_fp );
+	fclose( out_fp );
+	
+	return( 0 );
+	
+} /* convertELF */
+
+int main( int argc, char *argv[] )
+{
+	int i;
+	
+	quiet = false;
+	
+	/* parse program arguments */
+	for( i=1; i<argc; i++ )
+	{
+		if( strcasecmp( "-q", argv[i] ) == 0 )
+		{
+			quiet = true;
+		}
+		else
+		{
+			if( in_file == NULL )
+			{
+				in_file = argv[i];
+			}
+			else if( out_file == NULL )
+			{
+				out_file = argv[i];
+			}
+		}
+	}
+	
+	/* print banner if not in quiet mode */
+	if( !quiet )
+	{
+		printf( "PSn00bSDK elf2cpe - Experimental ELF to CPE executable "
+			"converter\n" );
+		printf( "2021 Meido-Tek Productions\n\n" );
+	}
+	
+	/* print usage parameters if no arguments specified */
+	if( argc == 1 )
+	{
+		printf( "Usage:\n" );
+		printf( "  elf2cpe [-q] <elf_file> [cpe_file]\n" );
+		return( 0 );
+	}
+	
+	if( !in_file )
+	{
+		printf( "No input file specified.\n" );
+		return( 0 );
+	}
+	
+	return( convertELF() );
+	
+} /* main */
\ No newline at end of file