--- /dev/null
+/* 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 XEmacs.
+
+XEmacs 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.
+
+XEmacs 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 XEmacs; see the file COPYING. If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+/* Synched up with: NeXT port */
+
+#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);
+ }
+ }
projects / chise / xemacs-chise.git- / blobdiff