void asmb(void) { Prog *p; long t, etext; Optab *o; if(debug['v']) Bprint(&bso, "%5.2f asm\n", cputime()); Bflush(&bso); OFFSET = HEADR; seek(cout, OFFSET, 0); pc = INITTEXT; for(p = firstp; p != P; p = p->link) { if(p->as == ATEXT) { curtext = p; autosize = p->to.offset + 4; } if(p->pc != pc) { diag("phase error %lux sb %lux", p->pc, pc); if(!debug['a']) prasm(curp); pc = p->pc; } curp = p; o = oplook(p); /* could probably avoid this call */ asmout(p, o); pc += o->size; } if(debug['a']) Bprint(&bso, "\n"); Bflush(&bso); cflush(); /* output strings in text segment */ etext = INITTEXT + textsize; for(t = pc; t < etext; t += sizeof(buf)-100) { if(etext-t > sizeof(buf)-100) datblk(t, sizeof(buf)-100, 1); else datblk(t, etext-t, 1); } curtext = P; switch(HEADTYPE) { case 0: case 1: case 2: case 5: case 7: OFFSET = HEADR+textsize; seek(cout, OFFSET, 0); break; case 3: case 6: /* no header, padded segments */ OFFSET = rnd(HEADR+textsize, 4096); seek(cout, OFFSET, 0); break; } if(dlm){ char buf[8]; write(cout, buf, INITDAT-textsize); textsize = INITDAT; } for(t = 0; t < datsize; t += sizeof(buf)-100) { if(datsize-t > sizeof(buf)-100) datblk(t, sizeof(buf)-100, 0); else datblk(t, datsize-t, 0); } symsize = 0; lcsize = 0; if(!debug['s']) { if(debug['v']) Bprint(&bso, "%5.2f sym\n", cputime()); Bflush(&bso); switch(HEADTYPE) { case 0: case 1: case 4: case 5: debug['s'] = 1; break; case 2: OFFSET = HEADR+textsize+datsize; seek(cout, OFFSET, 0); break; case 3: case 6: /* no header, padded segments */ OFFSET += rnd(datsize, 4096); seek(cout, OFFSET, 0); break; case 7: break; } if(!debug['s']) asmsym(); if(debug['v']) Bprint(&bso, "%5.2f pc\n", cputime()); Bflush(&bso); if(!debug['s']) asmlc(); if(dlm) asmdyn(); cflush(); } else if(dlm){ seek(cout, HEADR+textsize+datsize, 0); asmdyn(); cflush(); } if(debug['v']) Bprint(&bso, "%5.2f header\n", cputime()); Bflush(&bso); OFFSET = 0; seek(cout, OFFSET, 0); switch(HEADTYPE) { case 0: /* no header */ case 6: /* no header, padded segments */ break; case 1: /* aif for risc os */ lputl(0xe1a00000); /* NOP - decompress code */ lputl(0xe1a00000); /* NOP - relocation code */ lputl(0xeb000000 + 12); /* BL - zero init code */ lputl(0xeb000000 + (entryvalue() - INITTEXT + HEADR - 12 - 8) / 4); /* BL - entry code */ lputl(0xef000011); /* SWI - exit code */ lputl(textsize+HEADR); /* text size */ lputl(datsize); /* data size */ lputl(0); /* sym size */ lputl(bsssize); /* bss size */ lputl(0); /* sym type */ lputl(INITTEXT-HEADR); /* text addr */ lputl(0); /* workspace - ignored */ lputl(32); /* addr mode / data addr flag */ lputl(0); /* data addr */ for(t=0; t<2; t++) lputl(0); /* reserved */ for(t=0; t<15; t++) lputl(0xe1a00000); /* NOP - zero init code */ lputl(0xe1a0f00e); /* B (R14) - zero init return */ break; case 2: /* plan 9 */ if(dlm) lput(0x80000000|0x647); /* magic */ else lput(0x647); /* magic */ lput(textsize); /* sizes */ lput(datsize); lput(bsssize); lput(symsize); /* nsyms */ lput(entryvalue()); /* va of entry */ lput(0L); lput(lcsize); break; case 3: /* boot for NetBSD */ lput((143<<16)|0413); /* magic */ lputl(rnd(HEADR+textsize, 4096)); lputl(rnd(datsize, 4096)); lputl(bsssize); lputl(symsize); /* nsyms */ lputl(entryvalue()); /* va of entry */ lputl(0L); lputl(0L); break; case 4: /* boot for IXP1200 */ break; case 5: /* boot for ipaq */ lputl(0xe3300000); /* nop */ lputl(0xe3300000); /* nop */ lputl(0xe3300000); /* nop */ lputl(0xe3300000); /* nop */ break; case 7: /* elf */ debug['S'] = 1; /* symbol table */ elf32(ARM, ELFDATA2LSB, 0, nil); break; } cflush(); }
void asmb(void) { int32 t; int a, dynsym; uint32 va, fo, w, startva; int strtabsize; ElfEhdr *eh; ElfPhdr *ph, *pph; ElfShdr *sh; Section *sect; strtabsize = 0; if(debug['v']) Bprint(&bso, "%5.2f asmb\n", cputime()); Bflush(&bso); sect = segtext.sect; seek(cout, sect->vaddr - segtext.vaddr + segtext.fileoff, 0); codeblk(sect->vaddr, sect->len); /* output read-only data in text segment */ sect = segtext.sect->next; seek(cout, sect->vaddr - segtext.vaddr + segtext.fileoff, 0); datblk(sect->vaddr, sect->len); if(debug['v']) Bprint(&bso, "%5.2f datblk\n", cputime()); Bflush(&bso); seek(cout, segdata.fileoff, 0); datblk(segdata.vaddr, segdata.filelen); /* output read-only data in text segment */ sect = segtext.sect->next; seek(cout, sect->vaddr - segtext.vaddr + segtext.fileoff, 0); datblk(sect->vaddr, sect->len); /* output symbol table */ symsize = 0; lcsize = 0; if(!debug['s']) { // TODO: rationalize if(debug['v']) Bprint(&bso, "%5.2f sym\n", cputime()); Bflush(&bso); switch(HEADTYPE) { case Hnoheader: case Hrisc: case Hixp1200: case Hipaq: debug['s'] = 1; break; case Hplan9x32: OFFSET = HEADR+textsize+segdata.filelen; seek(cout, OFFSET, 0); break; case Hnetbsd: OFFSET += rnd(segdata.filelen, 4096); seek(cout, OFFSET, 0); break; case Hlinux: OFFSET += segdata.filelen; seek(cout, rnd(OFFSET, INITRND), 0); break; } if(!debug['s']) asmthumbmap(); cflush(); } cursym = nil; if(debug['v']) Bprint(&bso, "%5.2f header\n", cputime()); Bflush(&bso); OFFSET = 0; seek(cout, OFFSET, 0); switch(HEADTYPE) { case Hnoheader: /* no header */ break; case Hrisc: /* aif for risc os */ lputl(0xe1a00000); /* NOP - decompress code */ lputl(0xe1a00000); /* NOP - relocation code */ lputl(0xeb000000 + 12); /* BL - zero init code */ lputl(0xeb000000 + (entryvalue() - INITTEXT + HEADR - 12 - 8) / 4); /* BL - entry code */ lputl(0xef000011); /* SWI - exit code */ lputl(textsize+HEADR); /* text size */ lputl(segdata.filelen); /* data size */ lputl(0); /* sym size */ lputl(segdata.len - segdata.filelen); /* bss size */ lputl(0); /* sym type */ lputl(INITTEXT-HEADR); /* text addr */ lputl(0); /* workspace - ignored */ lputl(32); /* addr mode / data addr flag */ lputl(0); /* data addr */ for(t=0; t<2; t++) lputl(0); /* reserved */ for(t=0; t<15; t++) lputl(0xe1a00000); /* NOP - zero init code */ lputl(0xe1a0f00e); /* B (R14) - zero init return */ break; case Hplan9x32: /* plan 9 */ lput(0x647); /* magic */ lput(textsize); /* sizes */ lput(segdata.filelen); lput(segdata.len - segdata.filelen); lput(symsize); /* nsyms */ lput(entryvalue()); /* va of entry */ lput(0L); lput(lcsize); break; case Hnetbsd: /* boot for NetBSD */ lput((143<<16)|0413); /* magic */ lputl(rnd(HEADR+textsize, 4096)); lputl(rnd(segdata.filelen, 4096)); lputl(segdata.len - segdata.filelen); lputl(symsize); /* nsyms */ lputl(entryvalue()); /* va of entry */ lputl(0L); lputl(0L); break; case Hixp1200: /* boot for IXP1200 */ break; case Hipaq: /* boot for ipaq */ lputl(0xe3300000); /* nop */ lputl(0xe3300000); /* nop */ lputl(0xe3300000); /* nop */ lputl(0xe3300000); /* nop */ break; case Hlinux: /* elf arm */ eh = getElfEhdr(); fo = HEADR; va = INITTEXT; startva = INITTEXT - fo; /* va of byte 0 of file */ w = textsize; /* This null SHdr must appear before all others */ sh = newElfShdr(elfstr[ElfStrEmpty]); /* program header info */ pph = newElfPhdr(); pph->type = PT_PHDR; pph->flags = PF_R + PF_X; pph->off = eh->ehsize; pph->vaddr = INITTEXT - HEADR + pph->off; pph->paddr = INITTEXT - HEADR + pph->off; pph->align = INITRND; if(!debug['d']) { /* interpreter for dynamic linking */ sh = newElfShdr(elfstr[ElfStrInterp]); sh->type = SHT_PROGBITS; sh->flags = SHF_ALLOC; sh->addralign = 1; if(interpreter == nil) interpreter = linuxdynld; elfinterp(sh, startva, interpreter); ph = newElfPhdr(); ph->type = PT_INTERP; ph->flags = PF_R; phsh(ph, sh); } elfphload(&segtext); elfphload(&segdata); /* Dynamic linking sections */ if (!debug['d']) { /* -d suppresses dynamic loader format */ /* S headers for dynamic linking */ sh = newElfShdr(elfstr[ElfStrGot]); sh->type = SHT_PROGBITS; sh->flags = SHF_ALLOC+SHF_WRITE; sh->entsize = 4; sh->addralign = 4; shsym(sh, lookup(".got", 0)); sh = newElfShdr(elfstr[ElfStrGotPlt]); sh->type = SHT_PROGBITS; sh->flags = SHF_ALLOC+SHF_WRITE; sh->entsize = 4; sh->addralign = 4; shsym(sh, lookup(".got.plt", 0)); dynsym = eh->shnum; sh = newElfShdr(elfstr[ElfStrDynsym]); sh->type = SHT_DYNSYM; sh->flags = SHF_ALLOC; sh->entsize = ELF32SYMSIZE; sh->addralign = 4; sh->link = dynsym+1; // dynstr // sh->info = index of first non-local symbol (number of local symbols) shsym(sh, lookup(".dynsym", 0)); sh = newElfShdr(elfstr[ElfStrDynstr]); sh->type = SHT_STRTAB; sh->flags = SHF_ALLOC; sh->addralign = 1; shsym(sh, lookup(".dynstr", 0)); sh = newElfShdr(elfstr[ElfStrHash]); sh->type = SHT_HASH; sh->flags = SHF_ALLOC; sh->entsize = 4; sh->addralign = 4; sh->link = dynsym; shsym(sh, lookup(".hash", 0)); sh = newElfShdr(elfstr[ElfStrRel]); sh->type = SHT_REL; sh->flags = SHF_ALLOC; sh->entsize = ELF32RELSIZE; sh->addralign = 4; sh->link = dynsym; shsym(sh, lookup(".rel", 0)); /* sh and PT_DYNAMIC for .dynamic section */ sh = newElfShdr(elfstr[ElfStrDynamic]); sh->type = SHT_DYNAMIC; sh->flags = SHF_ALLOC+SHF_WRITE; sh->entsize = 8; sh->addralign = 4; sh->link = dynsym+1; // dynstr shsym(sh, lookup(".dynamic", 0)); ph = newElfPhdr(); ph->type = PT_DYNAMIC; ph->flags = PF_R + PF_W; phsh(ph, sh); /* * Thread-local storage segment (really just size). if(tlsoffset != 0) { ph = newElfPhdr(); ph->type = PT_TLS; ph->flags = PF_R; ph->memsz = -tlsoffset; ph->align = 4; } */ } ph = newElfPhdr(); ph->type = PT_GNU_STACK; ph->flags = PF_W+PF_R; ph->align = 4; for(sect=segtext.sect; sect!=nil; sect=sect->next) elfshbits(sect); for(sect=segdata.sect; sect!=nil; sect=sect->next) elfshbits(sect); if (!debug['s']) { sh = newElfShdr(elfstr[ElfStrGosymtab]); sh->type = SHT_PROGBITS; sh->flags = SHF_ALLOC; sh->addralign = 1; shsym(sh, lookup("symtab", 0)); sh = newElfShdr(elfstr[ElfStrGopclntab]); sh->type = SHT_PROGBITS; sh->flags = SHF_ALLOC; sh->addralign = 1; shsym(sh, lookup("pclntab", 0)); } sh = newElfShstrtab(elfstr[ElfStrShstrtab]); sh->type = SHT_STRTAB; sh->addralign = 1; shsym(sh, lookup(".shstrtab", 0)); /* Main header */ eh->ident[EI_MAG0] = '\177'; eh->ident[EI_MAG1] = 'E'; eh->ident[EI_MAG2] = 'L'; eh->ident[EI_MAG3] = 'F'; eh->ident[EI_CLASS] = ELFCLASS32; eh->ident[EI_DATA] = ELFDATA2LSB; eh->ident[EI_VERSION] = EV_CURRENT; eh->type = ET_EXEC; eh->machine = EM_ARM; eh->version = EV_CURRENT; eh->entry = entryvalue(); if(pph != nil) { pph->filesz = eh->phnum * eh->phentsize; pph->memsz = pph->filesz; } seek(cout, 0, 0); a = 0; a += elfwritehdr(); a += elfwritephdrs(); a += elfwriteshdrs(); cflush(); if(a+elfwriteinterp() > ELFRESERVE) diag("ELFRESERVE too small: %d > %d", a, ELFRESERVE); break; } cflush(); if(debug['c']){ print("textsize=%d\n", textsize); print("datsize=%d\n", segdata.filelen); print("bsssize=%d\n", segdata.len - segdata.filelen); print("symsize=%d\n", symsize); print("lcsize=%d\n", lcsize); print("total=%d\n", textsize+segdata.len+symsize+lcsize); } }