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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
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@ -43,6 +43,7 @@
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char linuxdynld[] = "/lib64/ld-linux-x86-64.so.2";
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char freebsddynld[] = "/libexec/ld-elf.so.1";
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char openbsddynld[] = "/usr/libexec/ld.so";
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char zeroes[32];
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@ -554,7 +555,7 @@ doelf(void)
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{
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Sym *s, *shstrtab, *dynstr;
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if(HEADTYPE != Hlinux && HEADTYPE != Hfreebsd)
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if(HEADTYPE != Hlinux && HEADTYPE != Hfreebsd && HEADTYPE != Hopenbsd)
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return;
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/* predefine strings we need for section headers */
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@ -746,6 +747,7 @@ asmb(void)
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break;
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case Hlinux:
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case Hfreebsd:
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case Hopenbsd:
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debug['8'] = 1; /* 64-bit addresses */
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/* index of elf text section; needed by asmelfsym, double-checked below */
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/* !debug['d'] causes extra sections before the .text section */
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@ -780,6 +782,7 @@ asmb(void)
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break;
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case Hlinux:
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case Hfreebsd:
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case Hopenbsd:
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symo = rnd(HEADR+segtext.len, INITRND)+segdata.filelen;
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symo = rnd(symo, INITRND);
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break;
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@ -849,6 +852,7 @@ asmb(void)
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break;
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case Hlinux:
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case Hfreebsd:
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case Hopenbsd:
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/* elf amd-64 */
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eh = getElfEhdr();
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@ -891,6 +895,9 @@ asmb(void)
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case Hfreebsd:
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interpreter = freebsddynld;
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break;
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case Hopenbsd:
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interpreter = openbsddynld;
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break;
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}
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}
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elfinterp(sh, startva, interpreter);
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@ -1053,7 +1060,9 @@ asmb(void)
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eh->ident[EI_MAG2] = 'L';
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eh->ident[EI_MAG3] = 'F';
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if(HEADTYPE == Hfreebsd)
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eh->ident[EI_OSABI] = 9;
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eh->ident[EI_OSABI] = ELFOSABI_FREEBSD;
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else if(HEADTYPE == Hopenbsd)
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eh->ident[EI_OSABI] = ELFOSABI_OPENBSD;
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eh->ident[EI_CLASS] = ELFCLASS64;
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eh->ident[EI_DATA] = ELFDATA2LSB;
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eh->ident[EI_VERSION] = EV_CURRENT;
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@ -34,6 +34,8 @@ Options new in this version:
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Write Linux ELF binaries (default when $GOOS is linux)
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-Hfreebsd
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Write FreeBSD ELF binaries (default when $GOOS is freebsd)
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-Hopenbsd
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Write OpenBSD ELF binaries (default when $GOOS is openbsd)
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-Hwindows
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Write Windows PE32+ binaries (default when $GOOS is windows)
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-I interpreter
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@ -50,6 +50,7 @@ Header headers[] = {
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"darwin", Hdarwin,
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"linux", Hlinux,
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"freebsd", Hfreebsd,
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"openbsd", Hopenbsd,
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"windows", Hwindows,
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"windowsgui", Hwindows,
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0, 0
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@ -62,6 +63,7 @@ Header headers[] = {
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* -Hdarwin -Tx -Rx is apple MH-exec
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* -Hlinux -Tx -Rx is linux elf-exec
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* -Hfreebsd -Tx -Rx is FreeBSD elf-exec
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* -Hopenbsd -Tx -Rx is OpenBSD elf-exec
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* -Hwindows -Tx -Rx is MS Windows PE32+
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*
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* options used: 189BLQSWabcjlnpsvz
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@ -194,7 +196,8 @@ main(int argc, char *argv[])
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INITDAT = 0;
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break;
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case Hlinux: /* elf64 executable */
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case Hfreebsd: /* freebsd */
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case Hfreebsd: /* freebsd */
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case Hopenbsd: /* openbsd */
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/*
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* ELF uses TLS offset negative from FS.
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* Translate 0(FS) and 8(FS) into -16(FS) and -8(FS).
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@ -294,7 +294,8 @@ patch(void)
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p->from.offset = 0x58;
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}
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}
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if(HEADTYPE == Hlinux || HEADTYPE == Hfreebsd) {
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if(HEADTYPE == Hlinux || HEADTYPE == Hfreebsd
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|| HEADTYPE == Hopenbsd) {
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// ELF uses FS instead of GS.
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if(p->from.type == D_INDIR+D_GS)
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p->from.type = D_INDIR+D_FS;
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@ -419,7 +420,8 @@ dostkoff(void)
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if(!(p->from.scale & NOSPLIT)) {
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p = appendp(p); // load g into CX
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p->as = AMOVQ;
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if(HEADTYPE == Hlinux || HEADTYPE == Hfreebsd) // ELF uses FS
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if(HEADTYPE == Hlinux || HEADTYPE == Hfreebsd
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|| HEADTYPE == Hopenbsd) // ELF uses FS
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p->from.type = D_INDIR+D_FS;
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else
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p->from.type = D_INDIR+D_GS;
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@ -263,6 +263,7 @@ enum {
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Hlinux, // Linux ELF
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Hfreebsd, // FreeBSD ELF
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Hwindows, // MS Windows PE
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Hopenbsd, // OpenBSD ELF
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};
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typedef struct Header Header;
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