]> Cypherpunks repositories - gostls13.git/commitdiff
[dev.power64] cmd/9l: introduce the power64 linker, based loosely on 5l
authorShenghou Ma <minux@golang.org>
Tue, 12 Aug 2014 03:44:23 +0000 (23:44 -0400)
committerShenghou Ma <minux@golang.org>
Tue, 12 Aug 2014 03:44:23 +0000 (23:44 -0400)
LGTM=rsc
R=rsc, iant
CC=golang-codereviews
https://golang.org/cl/123940043

src/cmd/9l/Makefile [new file with mode: 0644]
src/cmd/9l/asm.c [new file with mode: 0644]
src/cmd/9l/doc.go [new file with mode: 0644]
src/cmd/9l/list.c [new file with mode: 0644]
src/cmd/9l/obj.c [new file with mode: 0644]

diff --git a/src/cmd/9l/Makefile b/src/cmd/9l/Makefile
new file mode 100644 (file)
index 0000000..3f528d7
--- /dev/null
@@ -0,0 +1,5 @@
+# Copyright 2012 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+include ../../Make.dist
diff --git a/src/cmd/9l/asm.c b/src/cmd/9l/asm.c
new file mode 100644 (file)
index 0000000..5aeea1b
--- /dev/null
@@ -0,0 +1,338 @@
+// Inferno utils/5l/asm.c
+// http://code.google.com/p/inferno-os/source/browse/utils/5l/asm.c
+//
+//     Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
+//     Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
+//     Portions Copyright © 1997-1999 Vita Nuova Limited
+//     Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
+//     Portions Copyright © 2004,2006 Bruce Ellis
+//     Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
+//     Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
+//     Portions Copyright © 2009 The Go Authors.  All rights reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+// Writing object files.
+
+#include       "l.h"
+#include       "../ld/lib.h"
+#include       "../ld/elf.h"
+#include       "../ld/dwarf.h"
+
+
+char linuxdynld[] = "/lib64/ld64.so.1";
+char freebsddynld[] = "XXX";
+char openbsddynld[] = "XXX";
+char netbsddynld[] = "XXX";
+char dragonflydynld[] = "XXX";
+char solarisdynld[] = "XXX";
+
+static int
+needlib(char *name)
+{
+       char *p;
+       LSym *s;
+
+       if(*name == '\0')
+               return 0;
+
+       /* reuse hash code in symbol table */
+       p = smprint(".dynlib.%s", name);
+       s = linklookup(ctxt, p, 0);
+       free(p);
+       if(s->type == 0) {
+               s->type = 100;  // avoid SDATA, etc.
+               return 1;
+       }
+       return 0;
+}
+
+int    nelfsym = 1;
+
+// b is the addresses, a is the I-form branch instruction template, peform
+// addition so that the instruction jumps to address (offset) b.
+static int32
+braddoff(int32 a, int32 b)
+{
+       return (((uint32)a) & 0xfc000003U) | (0x03fffffcU & (uint32)((a & 0x3fffffcU) + b));
+}
+
+void
+adddynrela(LSym *rel, LSym *s, Reloc *r)
+{
+       // TODO(minux)
+       USED(rel); USED(s); USED(r);
+}
+
+void
+adddynrel(LSym *s, Reloc *r)
+{
+       LSym *targ;
+
+       // TODO(minux)
+
+       targ = r->sym;
+       ctxt->cursym = s;
+       diag("unsupported relocation for dynamic symbol %s (type=%d stype=%d)", targ->name, r->type, targ->type);
+}
+
+int
+elfreloc1(Reloc *r, vlong sectoff)
+{
+       USED(r); USED(sectoff);
+       // TODO(minux)
+       return -1;
+}
+
+void
+elfsetupplt(void)
+{
+       // TODO(minux)
+       return;
+}
+
+int
+machoreloc1(Reloc *r, vlong sectoff)
+{
+       USED(r);
+       USED(sectoff);
+
+       return -1;
+}
+
+
+int
+archreloc(Reloc *r, LSym *s, vlong *val)
+{
+       uint32 o1, o2;
+       int32 t;
+
+       if(linkmode == LinkExternal) {
+               // TODO(minux): translate R_ADDRPOWER and R_CALLPOWER into standard ELF relocations.
+               // R_ADDRPOWER corresponds to R_PPC_ADDR16_HA and R_PPC_ADDR16_LO.
+               // R_CALLPOWER corresponds to R_PPC_REL24.
+               return -1;
+       }
+       switch(r->type) {
+       case R_CONST:
+               *val = r->add;
+               return 0;
+       case R_GOTOFF:
+               *val = symaddr(r->sym) + r->add - symaddr(linklookup(ctxt, ".got", 0));
+               return 0;
+       case R_ADDRPOWER:
+               // r->add is two power64 instructions holding an immediate 32-bit constant.
+               // We want to add r->sym's address to that constant.
+               // The encoding of the immediate x<<16 + y,
+               // where x is the low 16 bits of the first instruction and y is the low 16
+               // bits of the second. Both x and y are signed (int16, not uint16).
+               o1 = r->add >> 32;
+               o2 = r->add;
+               t = symaddr(r->sym);
+               if(t < 0) {
+                       ctxt->diag("relocation for %s is too big (>=2G): %lld", s->name, symaddr(r->sym));
+               }
+               t += ((o1 & 0xffff) << 16) + ((int32)o2 << 16 >> 16);
+               if(t & 0x8000)
+                       t += 0x10000;
+               o1 = (o1 & 0xffff0000) | ((t >> 16) & 0xffff);
+               o2 = (o2 & 0xffff0000) | (t & 0xffff);
+               // when laid out, the instruction order must always be o1, o2.
+               if(ctxt->arch->endian == BigEndian)
+                       *val = ((vlong)o1 << 32) | o2;
+               else
+                       *val = ((vlong)o2 << 32) | o1;
+               return 0;
+       case R_CALLPOWER:
+               *val = braddoff((uint32)r->add, (int32)(symaddr(r->sym) - (s->value + r->off)));
+               return 0;
+       }
+       return -1;
+}
+
+void
+adddynsym(Link *ctxt, LSym *s)
+{
+       USED(ctxt); USED(s);
+       // TODO(minux)
+       return;
+}
+
+void
+adddynlib(char *lib)
+{
+       LSym *s;
+       
+       if(!needlib(lib))
+               return;
+       
+       if(iself) {
+               s = linklookup(ctxt, ".dynstr", 0);
+               if(s->size == 0)
+                       addstring(s, "");
+               elfwritedynent(linklookup(ctxt, ".dynamic", 0), DT_NEEDED, addstring(s, lib));
+       } else {
+               diag("adddynlib: unsupported binary format");
+       }
+}
+
+void
+asmb(void)
+{
+       uint32 symo;
+       Section *sect;
+       LSym *sym;
+       int i;
+
+       if(debug['v'])
+               Bprint(&bso, "%5.2f asmb\n", cputime());
+       Bflush(&bso);
+
+       if(iself)
+               asmbelfsetup();
+
+       sect = segtext.sect;
+       cseek(sect->vaddr - segtext.vaddr + segtext.fileoff);
+       codeblk(sect->vaddr, sect->len);
+       for(sect = sect->next; sect != nil; sect = sect->next) {
+               cseek(sect->vaddr - segtext.vaddr + segtext.fileoff);
+               datblk(sect->vaddr, sect->len);
+       }
+
+       if(segrodata.filelen > 0) {
+               if(debug['v'])
+                       Bprint(&bso, "%5.2f rodatblk\n", cputime());
+               Bflush(&bso);
+
+               cseek(segrodata.fileoff);
+               datblk(segrodata.vaddr, segrodata.filelen);
+       }
+
+       if(debug['v'])
+               Bprint(&bso, "%5.2f datblk\n", cputime());
+       Bflush(&bso);
+
+       cseek(segdata.fileoff);
+       datblk(segdata.vaddr, segdata.filelen);
+
+       /* output symbol table */
+       symsize = 0;
+       lcsize = 0;
+       symo = 0;
+       if(!debug['s']) {
+               // TODO: rationalize
+               if(debug['v'])
+                       Bprint(&bso, "%5.2f sym\n", cputime());
+               Bflush(&bso);
+               switch(HEADTYPE) {
+               default:
+                       if(iself)
+                               goto ElfSym;
+               case Hplan9:
+                       symo = HEADR+segtext.len+segdata.filelen;
+                       break;
+               ElfSym:
+                       symo = rnd(HEADR+segtext.filelen, INITRND)+rnd(HEADR+segrodata.filelen, INITRND)+segdata.filelen;
+                       symo = rnd(symo, INITRND);
+                       break;
+               }
+               cseek(symo);
+               switch(HEADTYPE) {
+               default:
+                       if(iself) {
+                               if(debug['v'])
+                                       Bprint(&bso, "%5.2f elfsym\n", cputime());
+                               asmelfsym();
+                               cflush();
+                               cwrite(elfstrdat, elfstrsize);
+       
+                               if(debug['v'])
+                                       Bprint(&bso, "%5.2f dwarf\n", cputime());
+                               dwarfemitdebugsections();
+                               
+                               if(linkmode == LinkExternal)
+                                       elfemitreloc();
+                       }
+                       break;
+               case Hplan9:
+                       asmplan9sym();
+                       cflush();
+
+                       sym = linklookup(ctxt, "pclntab", 0);
+                       if(sym != nil) {
+                               lcsize = sym->np;
+                               for(i=0; i < lcsize; i++)
+                                       cput(sym->p[i]);
+
+                               cflush();
+                       }
+                       break;
+               }
+       }
+
+       ctxt->cursym = nil;
+       if(debug['v'])
+               Bprint(&bso, "%5.2f header\n", cputime());
+       Bflush(&bso);
+       cseek(0L);
+       switch(HEADTYPE) {
+       default:
+       case Hplan9:    /* plan 9 */
+               LPUT(0x647);                    /* magic */
+               LPUT(segtext.filelen);                  /* sizes */
+               LPUT(segdata.filelen);
+               LPUT(segdata.len - segdata.filelen);
+               LPUT(symsize);                  /* nsyms */
+               LPUT(entryvalue());             /* va of entry */
+               LPUT(0L);
+               LPUT(lcsize);
+               break;
+       case Hlinux:
+       case Hfreebsd:
+       case Hnetbsd:
+       case Hopenbsd:
+       case Hnacl:
+               asmbelf(symo);
+               break;
+       }
+       cflush();
+       if(debug['c']){
+               print("textsize=%ulld\n", segtext.filelen);
+               print("datsize=%ulld\n", segdata.filelen);
+               print("bsssize=%ulld\n", segdata.len - segdata.filelen);
+               print("symsize=%d\n", symsize);
+               print("lcsize=%d\n", lcsize);
+               print("total=%lld\n", segtext.filelen+segdata.len+symsize+lcsize);
+       }
+}
+
+vlong
+rnd(vlong v, int32 r)
+{
+       vlong c;
+
+       if(r <= 0)
+               return v;
+       v += r - 1;
+       c = v % r;
+       if(c < 0)
+               c += r;
+       v -= c;
+       return v;
+}
diff --git a/src/cmd/9l/doc.go b/src/cmd/9l/doc.go
new file mode 100644 (file)
index 0000000..9df5dc6
--- /dev/null
@@ -0,0 +1,16 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+/*
+
+9l is the linker for the Power64.
+The $GOARCH for these tools is power64 (big endian) or
+power64le (little endian).
+
+The flags are documented in ../ld/doc.go.
+
+*/
+package main
diff --git a/src/cmd/9l/list.c b/src/cmd/9l/list.c
new file mode 100644 (file)
index 0000000..af8dc15
--- /dev/null
@@ -0,0 +1,40 @@
+// Inferno utils/5l/list.h
+// http://code.google.com/p/inferno-os/source/browse/utils/5l/list.c
+//
+//     Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
+//     Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
+//     Portions Copyright © 1997-1999 Vita Nuova Limited
+//     Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
+//     Portions Copyright © 2004,2006 Bruce Ellis
+//     Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
+//     Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
+//     Portions Copyright © 2009 The Go Authors.  All rights reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+// Printing.
+
+#include "l.h"
+#include "../ld/lib.h"
+
+void
+listinit(void)
+{
+       listinit9();
+}
diff --git a/src/cmd/9l/obj.c b/src/cmd/9l/obj.c
new file mode 100644 (file)
index 0000000..1ab18f4
--- /dev/null
@@ -0,0 +1,108 @@
+// Inferno utils/5l/obj.c
+// http://code.google.com/p/inferno-os/source/browse/utils/5l/obj.c
+//
+//     Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
+//     Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
+//     Portions Copyright © 1997-1999 Vita Nuova Limited
+//     Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
+//     Portions Copyright © 2004,2006 Bruce Ellis
+//     Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
+//     Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
+//     Portions Copyright © 2009 The Go Authors.  All rights reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+// Reading object files.
+
+#include       "l.h"
+#include       "../ld/lib.h"
+#include       "../ld/elf.h"
+#include       "../ld/dwarf.h"
+#include       <ar.h>
+
+char *thestring = "power64";
+LinkArch *thelinkarch;
+
+void
+linkarchinit(void)
+{
+       thestring = getgoarch();
+       if(strcmp(thestring, "power64le") == 0)
+               thelinkarch = &linkpower64le;
+       else
+               thelinkarch = &linkpower64;
+}
+
+void
+archinit(void)
+{
+       // getgoextlinkenabled is based on GO_EXTLINK_ENABLED when
+       // Go was built; see ../../make.bash.
+       if(linkmode == LinkAuto && strcmp(getgoextlinkenabled(), "0") == 0)
+               linkmode = LinkInternal;
+
+       switch(HEADTYPE) {
+       default:
+               if(linkmode == LinkAuto)
+                       linkmode = LinkInternal;
+               if(linkmode == LinkExternal && strcmp(getgoextlinkenabled(), "1") != 0)
+                       sysfatal("cannot use -linkmode=external with -H %s", headstr(HEADTYPE));
+               break;
+       }
+
+       switch(HEADTYPE) {
+       default:
+               diag("unknown -H option");
+               errorexit();
+       case Hplan9:    /* plan 9 */
+               HEADR = 32L;
+               if(INITTEXT == -1)
+                       INITTEXT = 4128;
+               if(INITDAT == -1)
+                       INITDAT = 0;
+               if(INITRND == -1)
+                       INITRND = 4096;
+               break;
+       case Hlinux:    /* power64 elf */
+               debug['d'] = 1; // TODO(minux): dynamic linking is not supported yet.
+               elfinit();
+               HEADR = ELFRESERVE;
+               if(INITTEXT == -1)
+                       INITTEXT = 0x10000 + HEADR;
+               if(INITDAT == -1)
+                       INITDAT = 0;
+               if(INITRND == -1)
+                       INITRND = 4096;
+               break;
+       case Hnacl:
+               elfinit();
+               HEADR = 0x10000;
+               funcalign = 16;
+               if(INITTEXT == -1)
+                       INITTEXT = 0x20000;
+               if(INITDAT == -1)
+                       INITDAT = 0;
+               if(INITRND == -1)
+                       INITRND = 0x10000;
+               break;
+       }
+       if(INITDAT != 0 && INITRND != 0)
+               print("warning: -D0x%ux is ignored because of -R0x%ux\n",
+                       INITDAT, INITRND);
+}