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6l: OpenBSD support

Add linker support for OpenBSD ELF-64.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/4815066
This commit is contained in:
Joel Sing 2011-07-29 13:47:41 -04:00 committed by Russ Cox
parent 91f0f18100
commit ffa14e849c
5 changed files with 22 additions and 5 deletions

View File

@ -43,6 +43,7 @@
char linuxdynld[] = "/lib64/ld-linux-x86-64.so.2";
char freebsddynld[] = "/libexec/ld-elf.so.1";
char openbsddynld[] = "/usr/libexec/ld.so";
char zeroes[32];
@ -554,7 +555,7 @@ doelf(void)
{
Sym *s, *shstrtab, *dynstr;
if(HEADTYPE != Hlinux && HEADTYPE != Hfreebsd)
if(HEADTYPE != Hlinux && HEADTYPE != Hfreebsd && HEADTYPE != Hopenbsd)
return;
/* predefine strings we need for section headers */
@ -746,6 +747,7 @@ asmb(void)
break;
case Hlinux:
case Hfreebsd:
case Hopenbsd:
debug['8'] = 1; /* 64-bit addresses */
/* index of elf text section; needed by asmelfsym, double-checked below */
/* !debug['d'] causes extra sections before the .text section */
@ -780,6 +782,7 @@ asmb(void)
break;
case Hlinux:
case Hfreebsd:
case Hopenbsd:
symo = rnd(HEADR+segtext.len, INITRND)+segdata.filelen;
symo = rnd(symo, INITRND);
break;
@ -849,6 +852,7 @@ asmb(void)
break;
case Hlinux:
case Hfreebsd:
case Hopenbsd:
/* elf amd-64 */
eh = getElfEhdr();
@ -891,6 +895,9 @@ asmb(void)
case Hfreebsd:
interpreter = freebsddynld;
break;
case Hopenbsd:
interpreter = openbsddynld;
break;
}
}
elfinterp(sh, startva, interpreter);
@ -1053,7 +1060,9 @@ asmb(void)
eh->ident[EI_MAG2] = 'L';
eh->ident[EI_MAG3] = 'F';
if(HEADTYPE == Hfreebsd)
eh->ident[EI_OSABI] = 9;
eh->ident[EI_OSABI] = ELFOSABI_FREEBSD;
else if(HEADTYPE == Hopenbsd)
eh->ident[EI_OSABI] = ELFOSABI_OPENBSD;
eh->ident[EI_CLASS] = ELFCLASS64;
eh->ident[EI_DATA] = ELFDATA2LSB;
eh->ident[EI_VERSION] = EV_CURRENT;

View File

@ -34,6 +34,8 @@ Options new in this version:
Write Linux ELF binaries (default when $GOOS is linux)
-Hfreebsd
Write FreeBSD ELF binaries (default when $GOOS is freebsd)
-Hopenbsd
Write OpenBSD ELF binaries (default when $GOOS is openbsd)
-Hwindows
Write Windows PE32+ binaries (default when $GOOS is windows)
-I interpreter

View File

@ -50,6 +50,7 @@ Header headers[] = {
"darwin", Hdarwin,
"linux", Hlinux,
"freebsd", Hfreebsd,
"openbsd", Hopenbsd,
"windows", Hwindows,
"windowsgui", Hwindows,
0, 0
@ -62,6 +63,7 @@ Header headers[] = {
* -Hdarwin -Tx -Rx is apple MH-exec
* -Hlinux -Tx -Rx is linux elf-exec
* -Hfreebsd -Tx -Rx is FreeBSD elf-exec
* -Hopenbsd -Tx -Rx is OpenBSD elf-exec
* -Hwindows -Tx -Rx is MS Windows PE32+
*
* options used: 189BLQSWabcjlnpsvz
@ -194,7 +196,8 @@ main(int argc, char *argv[])
INITDAT = 0;
break;
case Hlinux: /* elf64 executable */
case Hfreebsd: /* freebsd */
case Hfreebsd: /* freebsd */
case Hopenbsd: /* openbsd */
/*
* ELF uses TLS offset negative from FS.
* Translate 0(FS) and 8(FS) into -16(FS) and -8(FS).

View File

@ -294,7 +294,8 @@ patch(void)
p->from.offset = 0x58;
}
}
if(HEADTYPE == Hlinux || HEADTYPE == Hfreebsd) {
if(HEADTYPE == Hlinux || HEADTYPE == Hfreebsd
|| HEADTYPE == Hopenbsd) {
// ELF uses FS instead of GS.
if(p->from.type == D_INDIR+D_GS)
p->from.type = D_INDIR+D_FS;
@ -419,7 +420,8 @@ dostkoff(void)
if(!(p->from.scale & NOSPLIT)) {
p = appendp(p); // load g into CX
p->as = AMOVQ;
if(HEADTYPE == Hlinux || HEADTYPE == Hfreebsd) // ELF uses FS
if(HEADTYPE == Hlinux || HEADTYPE == Hfreebsd
|| HEADTYPE == Hopenbsd) // ELF uses FS
p->from.type = D_INDIR+D_FS;
else
p->from.type = D_INDIR+D_GS;

View File

@ -263,6 +263,7 @@ enum {
Hlinux, // Linux ELF
Hfreebsd, // FreeBSD ELF
Hwindows, // MS Windows PE
Hopenbsd, // OpenBSD ELF
};
typedef struct Header Header;