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PATCH to enable GNU ld on MIPS 64-bit ABI
- To: binutils@sourceware.cygnus.com
- Subject: PATCH to enable GNU ld on MIPS 64-bit ABI
- From: Mark Mitchell <mark@codesourcery.com>
- Date: Wed, 07 Jul 1999 19:39:47 -0700
- Organization: CodeSourcery, LLC
Here's the patch to enable the GNU linker on the 64-bit MIPS ABI.
Straightforward; the emulation is *almost* exactly the same as for the
N32 ABI.
OK to check in?
--
Mark Mitchell mark@codesourcery.com
CodeSourcery, LLC http://www.codesourcery.com
1999-07-07 Mark Mitchell <mark@codesourcery.com>
* Makefile.am (ALL_64_EMULATIONS): Add eelf64bmip.
(eelf64bmip): New target.
* Makefile.in: Regenerated.
* configure.tgt (mips-sgi-irix6*): Add 64-bit emulation.
* emulparams/eelf64bmip.sh: New file.
Index: Makefile.am
===================================================================
RCS file: /cvs/binutils/binutils/ld/Makefile.am,v
retrieving revision 1.8
diff -u -p -r1.8 Makefile.am
--- Makefile.am 1999/06/30 21:00:07 1.8
+++ Makefile.am 1999/07/08 02:23:27
@@ -208,7 +208,8 @@ ALL_EMULATIONS = \
ALL_64_EMULATIONS = \
eelf64_sparc.o \
- eelf64alpha.o
+ eelf64alpha.o \
+ eelf64bmip.o
ALL_EMUL_EXTRA_OFILES = \
pe-dll.o \
@@ -382,6 +383,9 @@ eelf64alpha.c: $(srcdir)/emulparams/elf6
eelf64_sparc.c: $(srcdir)/emulparams/elf64_sparc.sh \
$(srcdir)/emultempl/elf32.em $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
${GENSCRIPTS} elf64_sparc "$(tdir_elf64_sparc)"
+eelf64bmip.c: $(srcdir)/emulparams/elf64bmip.sh \
+ $(srcdir)/emultempl/elf32.em $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
+ ${GENSCRIPTS} elf64bmip "$(tdir_elf64bmip)"
eelf_i386.c: $(srcdir)/emulparams/elf_i386.sh \
$(srcdir)/emultempl/elf32.em $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
${GENSCRIPTS} elf_i386 "$(tdir_elf_i386)"
Index: configure.tgt
===================================================================
RCS file: /cvs/binutils/binutils/ld/configure.tgt,v
retrieving revision 1.9
diff -u -p -r1.9 configure.tgt
--- configure.tgt 1999/06/30 21:00:08 1.9
+++ configure.tgt 1999/07/08 02:23:32
@@ -178,7 +178,7 @@ mips*-dec-ultrix*) targ_emul=mipslit ;;
mips*-dec-osf*) targ_emul=mipslit ;;
mips*-sgi-irix5*) targ_emul=elf32bsmip ;;
mips*-sgi-irix6*) targ_emul=elf32bmipn32
- targ_extra_emuls="elf32bsmip"
+ targ_extra_emuls="elf32bsmip elf64bmip"
;;
mips*-sgi-irix*) targ_emul=mipsbig ;;
mips*el-*-ecoff*) targ_emul=mipsidtl ;;
Index: emulparams/elf64bmip.sh
===================================================================
RCS file: elf64bmip.sh
diff -N elf64bmip.sh
--- /dev/null Sat Dec 5 20:30:03 1998
+++ elf64bmip.sh Wed Jul 7 19:23:32 1999
@@ -0,0 +1,47 @@
+# This is an ELF platform.
+SCRIPT_NAME=elf
+
+# Handle both big- and little-ended 32-bit MIPS objects.
+ARCH=mips
+OUTPUT_FORMAT="elf64-bigmips"
+BIG_OUTPUT_FORMAT="elf64-bigmips"
+LITTLE_OUTPUT_FORMAT="elf64-littlemips"
+
+# Note that the elf32 template is used for 64-bit emulations as well
+# as 32-bit emulations.
+ELFSIZE=64
+TEMPLATE_NAME=elf32
+
+TEXT_START_ADDR=0x10000000
+MAXPAGESIZE=0x100000
+ENTRY=__start
+
+# GOT-related settings.
+OTHER_GOT_SYMBOLS='
+ _gp = ALIGN(16) + 0x7ff0;
+'
+OTHER_GOT_SECTIONS='
+ .lit8 : { *(.lit8) }
+ .lit4 : { *(.lit4) }
+ .srdata : { *(.srdata) }
+'
+
+# Magic symbols.
+TEXT_START_SYMBOLS='_ftext = . ;'
+DATA_START_SYMBOLS='_fdata = . ;'
+OTHER_BSS_SYMBOLS='_fbss = .;'
+# IRIX6 defines these symbols. 0x40 is the size of the ELF header.
+EXECUTABLE_SYMBOLS="
+ __dso_displacement = 0;
+ __elf_header = ${TEXT_START_ADDR};
+ __program_header_table = ${TEXT_START_ADDR} + 0x40;
+"
+
+# There are often dynamic relocations against the .rodata section.
+# Setting DT_TEXTREL in the .dynamic section does not convince the
+# IRIX6 linker to permit relocations against the text segment.
+# Following the IRIX linker, we simply put .rodata in the data
+# segment.
+WRITABLE_RODATA=
+
+