This is unexnext.c in view mode; [Download] [Up]
/* Dump Emacs in macho format.
Copyright (C) 1990, 1993 Free Software Foundation, Inc.
Written by Bradley Taylor (btaylor@next.com).
This file is part of GNU Emacs.
GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <stdio.h>
#include <libc.h>
#include <nlist.h>
#include <mach/mach.h>
#include <mach-o/ldsyms.h>
#include <mach-o/loader.h>
int malloc_cookie;
static void fatal_unexec(char *format, ...)
{
va_list ap;
va_start(ap, format);
fprintf(stderr, "unexec: ");
vfprintf(stderr, format, ap);
fprintf(stderr, "\n");
va_end(ap);
exit(1);
}
static void mcopy(int ffd,int tfd,
unsigned long fpos,unsigned long tpos,unsigned long len)
{
if ((ffd==-1)&&(tfd==-1))
{
char *f,*t,*e;
if (fpos>tpos)
{
f=(char *)fpos;
t=(char *)tpos;
e=(char *)(fpos+len);
while(f<e) *t++=*f++;
}
else if (tpos>fpos)
{
f=(char *)(fpos+len);
t=(char *)(tpos+len);
e=(char *)fpos;
while(f>e) *--t=*--f;
}
}
else if (ffd==-1)
{
if (lseek(tfd,tpos,L_SET)<0)
fatal_unexec("cannot seek target");
if (write(tfd,(void *)fpos,len)!=len)
fatal_unexec("cannot write target");
}
else if (tfd==-1)
{
if (lseek(ffd,fpos,L_SET)<0)
fatal_unexec("cannot seek source");
if (read(ffd,(void *)tpos,len)!=len)
fatal_unexec("cannot read source");
}
else
{
int bread;
char *buf=alloca(1<<16);
if (lseek(ffd,fpos,L_SET)<0)
fatal_unexec("cannot seek source");
if (lseek(tfd,tpos,L_SET)<0)
fatal_unexec("cannot seek target");
while((len>0) && (bread=read(ffd,buf,MIN(1<<16,len)))>0)
{
if (bread<0)
fatal_unexec("cannot read source");
if (write(tfd,buf,bread)!=bread)
fatal_unexec("cannot write target");
len-=bread;
}
}
}
static void unexec_doit(int infd,int outfd)
{
int i,j,hpos,opos;
extern int malloc_freezedry(void);
struct region
{
struct region *next;
unsigned long addr;
unsigned long size;
vm_prot_t prot;
vm_prot_t mprot;
} *regions=0,*cregion,**pregions;
struct mach_header mh;
struct segment_command *lc,*sp;
struct symtab_command *st;
struct section *sect;
malloc_cookie=malloc_freezedry();
{
vm_task_t task=task_self();
vm_address_t addr;
vm_size_t size;
vm_prot_t prot,mprot;
vm_inherit_t inhe;
boolean_t shrd;
port_t name;
vm_offset_t offset;
for(addr=VM_MIN_ADDRESS,pregions=®ions;
vm_region(task,&addr,&size,&prot,&mprot,
&inhe,&shrd,&name,&offset)==KERN_SUCCESS;
addr += size)
{
(*pregions)=alloca(sizeof(struct region));
(*pregions)->addr=addr;
(*pregions)->size=size;
(*pregions)->prot=prot;
(*pregions)->mprot=mprot;
(*pregions)->next=0;
pregions=&((*pregions)->next);
}
}
for(cregion=regions;cregion;cregion=cregion->next)
while ((cregion->next) &&
(cregion->next->addr==cregion->addr+cregion->size) &&
(cregion->next->prot==cregion->prot) &&
(cregion->next->mprot==cregion->mprot))
{
cregion->size += cregion->next->size;
cregion->next = cregion->next->next;
}
mcopy(infd,-1,0,(unsigned long) &mh,sizeof(mh));
lc=alloca(mh.sizeofcmds);
mcopy(infd,-1,sizeof(mh),(unsigned long) lc,mh.sizeofcmds);
for(pregions=®ions;*pregions;)
{
if (!((*pregions)->prot&VM_PROT_WRITE)
|| ((*pregions)->addr>=0x3000000))
goto kill_region;
for(sp=lc,i=0;
i<mh.ncmds;
i++,sp=(struct segment_command *)(((char *)sp)+sp->cmdsize))
{
unsigned long ob,oe;
if (sp->cmd!=LC_SEGMENT||(strcmp(sp->segname,SEG_DATA)==0)) continue;
ob=MAX((*pregions)->addr,sp->vmaddr);
oe=MIN((*pregions)->addr+(*pregions)->size,sp->vmaddr+sp->vmsize);
if (ob >= oe) continue;
if (ob==(*pregions)->addr)
if (oe==(*pregions)->addr+(*pregions)->size)
{
goto kill_region;
}
else
{
(*pregions)->addr=oe;
(*pregions)->size-=(oe-ob);
}
else
if (oe==(*pregions)->addr+(*pregions)->size)
{
(*pregions)->size-=(oe-ob);
}
else
{
cregion=alloca(sizeof(*cregion));
cregion->addr=oe;
cregion->size=((*pregions)->addr+(*pregions)->size)-oe;
cregion->prot=(*pregions)->prot;
cregion->mprot=(*pregions)->mprot;
cregion->next=(*pregions)->next;
(*pregions)->size=ob-(*pregions)->addr;
(*pregions)->next=cregion;
}
}
pregions=&((*pregions)->next);
continue;
kill_region:
*pregions=(*pregions)->next;
}
for(sp=lc,i=mh.ncmds,hpos=sizeof(mh),opos=0;
i>0;
i--,sp=(struct segment_command *)(((char *)sp)+sp->cmdsize))
switch (sp->cmd)
{
case LC_SEGMENT:
if (strcmp(sp->segname,SEG_DATA)==0)
{
mh.ncmds--;
j=sp->cmdsize;
while (regions)
{
mcopy(-1,outfd,regions->addr,opos,regions->size);
sp->cmd=LC_SEGMENT;
sp->cmdsize=sizeof(*sp);
strncpy(sp->segname,SEG_DATA,sizeof(sp->segname));
sp->vmaddr=regions->addr;
sp->vmsize=regions->size;
sp->filesize=regions->size;
sp->maxprot=regions->prot;
sp->initprot=regions->mprot;
sp->nsects=0;
sp->flags=0;
sp->fileoff=opos;
opos+=sp->filesize;
mcopy(-1,outfd,(unsigned long)sp,hpos,sp->cmdsize);
hpos+=sp->cmdsize;
mh.ncmds++;
regions=regions->next;
}
sp->cmdsize=j;
regions=0;
}
else if (strcmp(sp->segname,SEG_LINKEDIT)==0)
{
mh.ncmds--;
}
else
{
mcopy(infd,outfd,sp->fileoff,opos,sp->filesize);
sect=(struct section *) (((char *)sp)+sizeof(*sp));
for(j=0;j<sp->nsects;j++)
{
if (sect[j].offset!=0)
sect[j].offset=(sect[j].offset-sp->fileoff)+opos;
if (sect[j].reloff!=0)
sect[j].reloff=(sect[j].reloff-sp->fileoff)+opos;
}
sp->fileoff=opos;
opos+=sp->filesize;
mcopy(-1,outfd,(unsigned long)sp,hpos,sp->cmdsize);
hpos+=sp->cmdsize;
}
break;
case LC_SYMTAB:
st=(struct symtab_command *)sp;
mcopy(infd,outfd,st->symoff,opos,st->nsyms*sizeof(struct nlist));
st->symoff=opos;
opos+=sizeof(struct nlist)*st->nsyms;
mcopy(infd,outfd,st->stroff,opos,st->strsize);
((struct symtab_command *)sp)->stroff=opos;
opos+=((struct symtab_command *)sp)->strsize;
default:
mcopy(-1,outfd,(unsigned long)sp,hpos,sp->cmdsize);
hpos+=sp->cmdsize;
}
mh.sizeofcmds=hpos-sizeof(mh);
mcopy(-1,outfd,(unsigned long) &mh,0,sizeof(mh));
}
void unexec(char *outfile,char *infile)
{
char tmpfile[MAXPATHLEN];
int infd,outfd;
if ((infd=open(infile, O_RDONLY, 0))<0)
fatal_unexec("cannot open input file `%s'", infile);
strcpy(tmpfile,outfile);
strcat(tmpfile,"-temp");
if ((outfd=open(tmpfile, O_RDWR|O_TRUNC|O_CREAT, 0755))<0)
fatal_unexec("cannot open temporary output file `%s'",tmpfile);
unexec_doit(infd,outfd);
close(infd);
close(outfd);
if (rename(tmpfile, outfile)<0)
{
unlink(tmpfile);
fatal_unexec("cannot rename `%s' to `%s'", tmpfile, outfile);
}
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.