ref: 8403ad31262165522d19e4189292c7c3fdbba45e
author: Tevo <estevan.cps@gmail.com>
date: Sun Dec 6 22:22:00 EST 2020
Initial commit, probably broken
--- /dev/null
+++ b/main.c
@@ -1,0 +1,141 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+#include <mach.h>
+
+int keepgoing;
+char *out = "out.dol";
+
+typedef struct Dolhdr Dolhdr;
+
+struct Dolhdr
+{+ u32int txtoff[7];
+ u32int datoff[11];
+ u32int txtaddr[7];
+ u32int dataddr[11];
+ u32int txtsz[7];
+ u32int datsz[11];
+ u32int bssaddr;
+ u32int bsssz;
+ u32int entry;
+ uchar padding[26];
+};
+
+enum
+{+ BIG, LITTLE
+};
+
+int
+curendianness(void)
+{+ union
+ {+ int i;
+ uchar c;
+ } v;
+
+ v.i = 0xFF;
+ return v.c == 0xFF;
+}
+
+void
+bigstore(char *dest, void* src, usize len)
+{+ char *s = src;
+
+ if(curendianness() == BIG)
+ memcpy(dest, src, len);
+ else
+ for(int c = 0; c < len; c++)
+ dest[c] = s[len-c];
+}
+
+#pragma varargck argpos error 1
+void
+error(char *fmt, ...)
+{+ va_list args;
+ char *str;
+
+ va_start(args, fmt);
+ str = vsmprint(fmt, args);
+ fprint(2, "%s: %s\n", argv0, str);
+ if(!keepgoing)
+ exits(str);
+ free(str);
+ va_end(args);
+}
+
+void
+usage(void)
+{+ fprint(2, "usage: %s [-k] [-o out] exec\n", argv0);
+ exits("usage");+}
+
+void
+main(int argc, char **argv)
+{+ Dolhdr dol;
+ Fhdr fhdr;
+ int ofd, ifd;
+ char buf[2048];
+
+ ARGBEGIN {+ case 'o':
+ out = EARGF(usage());
+ break;
+ case 'k':
+ keepgoing++;
+ break;
+ default:
+ usage();
+ } ARGEND;
+
+ if(argc != 1)
+ usage();
+
+ if((ifd = open(*argv, OREAD)) < 0)
+ sysfatal("open: %r");+
+ if((ofd = create(out, OWRITE|OTRUNC, 0755)) < 0)
+ sysfatal("create: %r");+
+ crackhdr(ifd, &fhdr);
+
+ if(fhdr.type != FPOWER && fhdr.type != FPOWERB)
+ error("not a PowerPC executable (%d)", fhdr.type);+
+ machbytype(fhdr.type);
+
+ dol.txtaddr[0] = beswal(fhdr.txtaddr);
+ dol.txtoff[0] = beswal(fhdr.txtoff);
+ dol.txtsz[0] = beswal(fhdr.txtsz);
+ if(fhdr.txtaddr < 0x80003F00 || fhdr.txtaddr > 0x81330000)
+ error("text outside standard executable area (0x%08lX)", (ulong)fhdr.txtaddr);+
+ dol.dataddr[0] = beswal(fhdr.dataddr);
+ dol.datoff[0] = beswal(fhdr.datoff);
+ dol.datsz[0] = beswal(fhdr.datsz);
+
+ dol.bssaddr = fhdr.dataddr + fhdr.datsz; /* FIXME? */
+ dol.bsssz = fhdr.bsssz;
+
+ dol.entry = fhdr.entry;
+
+ /* TODO validate addresses */
+
+ if(write(ofd, &dol, sizeof(dol)) != sizeof(dol))
+ sysfatal("write: %r");+
+ seek(ifd, fhdr.hdrsz, 0);
+ while(read(ifd, buf, sizeof(buf)) > 0)
+ if(write(ofd, buf, sizeof(buf)) != sizeof(buf))
+ sysfatal("write: %r");+
+ close(ofd);
+ close(ifd);
+ exits(0);
+}
--- /dev/null
+++ b/mkfile
@@ -1,0 +1,9 @@
+</$objtype/mkfile
+
+OFILES=\
+ main.$O
+
+BINDIR=\
+ /$objtype/bin
+
+</sys/src/cmd/mkone