diff options
Diffstat (limited to 'tools/elf2exe.c')
| -rwxr-xr-x | tools/elf2exe.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/tools/elf2exe.c b/tools/elf2exe.c new file mode 100755 index 0000000..89e2c6d --- /dev/null +++ b/tools/elf2exe.c @@ -0,0 +1,231 @@ +/*
+ * elf2exe
+ *
+ * Converts an ELF executable to PS-EXE, using objcopy
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+const unsigned char psexe_magic[8] = {'P','S','-','X',' ','E','X','E'};
+const char *psexe_marker_usa = "Sony Computer Entertainment Inc. for North America area";
+const char *psexe_marker_jpn = "Sony Computer Entertainment Inc. for Japan area";
+const char *psexe_marker_eur = "Sony Computer Entertainment Inc. for Europe area";
+char *psexe_marker;
+
+//#define OBJCOPY_PATH "mipsel-unknown-elf-objcopy"
+
+int main(int argc, char *argv[])
+{
+ FILE *objcopy_out, *psexe;
+ char stringbuf[2048];
+ unsigned char charbuf;
+ int x;
+ unsigned int sz;
+ unsigned int gp = 0;
+
+ if(argc < 3)
+ {
+ printf("elf2exe - Converts an ELF executable to PS-EXE\n");
+ printf("usage: elf2exe [elf] [ps-x exe] <options>\n");
+ printf("\n");
+ printf("Options:\n");
+ printf("-mark_jpn - Use Japanese ascii marker (default: USA)\n");
+ printf("-mark_eur - Use European ascii marker (default: USA)\n");
+ printf("-mark=<mark> - Use custom ascii marker <mark>\n");
+ return -1;
+ }
+
+ psexe_marker = (char*)psexe_marker_usa;
+
+ for(x = 3; x < argc; x++)
+ {
+ if(strcmp(argv[x], "-mark_jpn") == 0)
+ psexe_marker = (char*)psexe_marker_jpn;
+
+ if(strcmp(argv[x], "-mark_eur") == 0)
+ psexe_marker = (char*)psexe_marker_eur;
+
+ if(strncmp(argv[x], "-mark=", 6) == 0)
+ {
+ if(strlen(argv[x]) >= 7)
+ psexe_marker = argv[x] + 6;
+ }
+
+ if(strncmp(argv[x], "-gp=", 4) == 0)
+ {
+ if(strlen(argv[x]) >= 5)
+ sscanf(argv[x] + 4, "%x", &gp);
+ }
+ }
+
+/*
+ * Now open the output file
+ */
+
+ psexe = fopen(argv[2], "wb");
+
+ if(psexe == NULL)
+ {
+ printf("Couldn't open %s for writing. Aborting!\n", argv[2]);
+ return -1;
+ }
+
+/*
+ * Write PSEXE magic string
+ */
+ fwrite(psexe_magic, sizeof(char), 8, psexe);
+
+/*
+ * Seek output file to 0x10, Initial Program Counter
+ */
+ fseek(psexe, 0x10, SEEK_SET);
+
+/*
+ * Write initial program counter = 0x80010000
+ */
+ charbuf = 0x00;
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+ charbuf = 0x01;
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+ charbuf = 0x80;
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+
+/*
+ * Global Pointer
+ */
+ charbuf = gp & 0xff;
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+ charbuf = (gp & 0xff00) >> 8;
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+ charbuf = (gp & 0xff0000) >> 16;
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+ charbuf = (gp & 0xff000000) >> 24;
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+
+/*
+ * Seek output file to 0x18, Text section start address
+ */
+ fseek(psexe, 0x18, SEEK_SET);
+
+/*
+ * Write text section start address = 0
+ */
+ charbuf = 0x00;
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+ charbuf = 0x00;
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+ charbuf = 0x01;
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+ charbuf = 0x80;
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+
+/*
+ * Seek output file to 0x30, Initial Stack Pointer
+ */
+ fseek(psexe, 0x30, SEEK_SET);
+
+/*
+ * Write Initial Stack Pointer = 0x801FFFF0
+ */
+ charbuf = 0xF0;
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+ charbuf = 0xFF;
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+ charbuf = 0x1F;
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+ charbuf = 0x80;
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+
+
+/*
+ * Seek output to 0x4C, ASCII marker
+ */
+ fseek(psexe, 0x4C, SEEK_SET);
+
+ x = 0;
+
+/*
+ * Write ASCII marker string
+ */
+ while(psexe_marker[x])
+ fwrite(&psexe_marker[x++], sizeof(char), 1, psexe);
+
+/*
+ * Run objcopy now
+ */
+ sprintf(stringbuf, OBJCOPY_PATH" -O binary %s %s.bin", argv[1], argv[1]);
+ system(stringbuf);
+
+ sprintf(stringbuf, "%s.bin", argv[1]);
+
+/*
+ * Open objcopy output
+ */
+
+ objcopy_out = fopen(stringbuf, "rb");
+ if(objcopy_out == NULL)
+ {
+ printf("Could not open objcopy output at %s. Check your permissions. Aborting.\n",
+ stringbuf);
+ return -1;
+ }
+
+/*
+ * Seek to 0x800, Program Start
+ * and write the output of objcopy into the PS-X EXE
+ */
+ fseek(psexe, 0x800, SEEK_SET);
+
+ while(!feof(objcopy_out))
+ {
+ x = fgetc(objcopy_out);
+ fputc(x, psexe);
+ }
+
+
+ fclose(objcopy_out);
+
+/*
+ * Get the file size of the PS-X EXE
+ */
+ fseek(psexe, 0, SEEK_END);
+ sz = ftell(psexe);
+ fseek(psexe, 0, SEEK_SET);
+
+ if(sz % 2048 != 0)
+ {
+ fseek(psexe, (((sz / 2048) + 1)*2048) - 1, SEEK_SET);
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+ sz = ftell(psexe);
+ }
+
+/*
+ * Write the address of the text section in the header of the PS-X EXE
+ */
+
+ sz -= 0x800;
+
+ fseek(psexe, 0x1C, SEEK_SET);
+
+ charbuf = sz & 0xff;
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+ charbuf = (sz & 0xff00) >> 8;
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+ charbuf = (sz & 0xff0000) >> 16;
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+ charbuf = (sz & 0xff000000) >> 24;
+ fwrite(&charbuf, sizeof(char), 1, psexe);
+
+ fclose(psexe);
+
+/*
+ * Remove objcopy output
+ */
+ sprintf(stringbuf, "%s.bin", argv[1]);
+ remove(stringbuf);
+
+ return 0;
+}
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