Add some Irix 5 support, mostly from Kazumoto Kojima

<kkojima@info.kanagawa-u.ac.jp>:
	* emulparams/elf32bmip.sh (SCRIPT_NAME): Change to elfmips.
	(SHLIB_TEXT_START_ADDR): Define.
	(OTHER_GOT_SYMBOLS): Define.
	(OTHER_READWRITE_SECTIONS): Remove initialization of _gp.
	(EXECUTABLE_SYMBOLS): Don't define.
	(DYNAMIC_LINK): Don't define.
	* emulparams/elf32lmip.sh: Same changes as elf32bmip.sh.
	* scripttempl/elfmips.sc: New file.
	* configure.host (mips*-dec-bsd*): Change mips to mips*.
	(mips*-sgi-irix4*): Likewise.
	(mips*-sgi-irix5*): New entry.
	* Makefile.in (eelf32bmip.c): Depend upon elfmips.sc rather than
	elf.sc.
	(eelf32lmip.c): Likewise.

ld/ChangeLog

@@ -1,3 +1,22 @@
+Mon Jan 15 15:07:19 1996  Ian Lance Taylor  <ian@cygnus.com>
+
+	Add some Irix 5 support, mostly from Kazumoto Kojima
+        <kkojima@info.kanagawa-u.ac.jp>:
+	* emulparams/elf32bmip.sh (SCRIPT_NAME): Change to elfmips.
+	(SHLIB_TEXT_START_ADDR): Define.
+	(OTHER_GOT_SYMBOLS): Define.
+	(OTHER_READWRITE_SECTIONS): Remove initialization of _gp.
+	(EXECUTABLE_SYMBOLS): Don't define.
+	(DYNAMIC_LINK): Don't define.
+	* emulparams/elf32lmip.sh: Same changes as elf32bmip.sh.
+	* scripttempl/elfmips.sc: New file.
+	* configure.host (mips*-dec-bsd*): Change mips to mips*.
+	(mips*-sgi-irix4*): Likewise.
+	(mips*-sgi-irix5*): New entry.
+	* Makefile.in (eelf32bmip.c): Depend upon elfmips.sc rather than
+	elf.sc.
+	(eelf32lmip.c): Likewise.
+
 Sat Jan 13 09:41:43 1996  Michael Meissner  <meissner@tiktok.cygnus.com>
 
 	* scripttempl/elfppc.sc: Remove support for .rel.* sections.  Add

ld/Makefile.in

@@ -410,10 +410,10 @@ eelf_i386.c: $(srcdir)/emulparams/elf_i386.sh \
   $(srcdir)/emultempl/elf32.em $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
 	${GENSCRIPTS} elf_i386
 eelf32bmip.c: $(srcdir)/emulparams/elf32bmip.sh \
-  $(srcdir)/emultempl/elf32.em $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
+  $(srcdir)/emultempl/elf32.em $(srcdir)/scripttempl/elfmips.sc ${GEN_DEPENDS}
 	${GENSCRIPTS} elf32bmip
 eelf32lmip.c: $(srcdir)/emulparams/elf32lmip.sh \
-  $(srcdir)/emultempl/elf32.em $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
+  $(srcdir)/emultempl/elf32.em $(srcdir)/scripttempl/elfmips.sc ${GEN_DEPENDS}
 	${GENSCRIPTS} elf32lmip
 eelf32b4300.c: $(srcdir)/emulparams/elf32b4300.sh \
   $(srcdir)/emultempl/elf32.em $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}

ld/emulparams/elf32bmip.sh

@@ -0,0 +1,27 @@
+SCRIPT_NAME=elfmips
+OUTPUT_FORMAT="elf32-bigmips"
+BIG_OUTPUT_FORMAT="elf32-bigmips"
+LITTLE_OUTPUT_FORMAT="elf32-littlemips"
+TEXT_START_ADDR=0x0400000
+DATA_ADDR=0x10000000
+MAXPAGESIZE=0x40000
+NONPAGED_TEXT_START_ADDR=0x0400000
+SHLIB_TEXT_START_ADDR=0x5ffe0000
+OTHER_READONLY_SECTIONS='.reginfo : { *(.reginfo) }'
+OTHER_GOT_SYMBOLS='
+  _gp = . + 0x7ff0;
+'
+OTHER_READWRITE_SECTIONS='
+  .lit8 : { *(.lit8) }
+  .lit4 : { *(.lit4) }
+'
+TEXT_START_SYMBOLS='_ftext = . ;'
+DATA_START_SYMBOLS='_fdata = . ;'
+OTHER_BSS_SYMBOLS='_fbss = .;'
+OTHER_SECTIONS='
+  .gptab.sdata : { *(.gptab.data) *(.gptab.sdata) }
+  .gptab.sbss : { *(.gptab.bss) *(.gptab.sbss) }
+'
+ARCH=mips
+TEMPLATE_NAME=elf32
+GENERATE_SHLIB_SCRIPT=yes

ld/emulparams/elf32lmip.sh

@@ -0,0 +1,27 @@
+SCRIPT_NAME=elfmips
+OUTPUT_FORMAT="elf32-littlemips"
+BIG_OUTPUT_FORMAT="elf32-bigmips"
+LITTLE_OUTPUT_FORMAT="elf32-littlemips"
+TEXT_START_ADDR=0x0400000
+DATA_ADDR=0x10000000
+MAXPAGESIZE=0x40000
+NONPAGED_TEXT_START_ADDR=0x0400000
+SHLIB_TEXT_START_ADDR=0x5ffe0000
+OTHER_READONLY_SECTIONS='.reginfo : { *(.reginfo) }'
+OTHER_GOT_SYMBOLS='
+  _gp = . + 0x7ff0;
+'
+OTHER_READWRITE_SECTIONS='
+  .lit8 : { *(.lit8) }
+  .lit4 : { *(.lit4) }
+'
+TEXT_START_SYMBOLS='_ftext = . ;'
+DATA_START_SYMBOLS='_fdata = . ;'
+OTHER_BSS_SYMBOLS='_fbss = .;'
+OTHER_SECTIONS='
+  .gptab.sdata : { *(.gptab.data) *(.gptab.sdata) }
+  .gptab.sbss : { *(.gptab.bss) *(.gptab.sbss) }
+'
+ARCH=mips
+TEMPLATE_NAME=elf32
+GENERATE_SHLIB_SCRIPT=yes

ld/scripttempl/.Sanitize

@@ -41,6 +41,7 @@ aout.sc
 delta68.sc
 ebmon29k.sc
 elf.sc
+elfmips.sc
 elfppc.sc
 go32coff.sc
 h8300.sc

ld/scripttempl/elfmips.sc

@@ -0,0 +1,167 @@
+#
+# Unusual variables checked by this code:
+#	NOP - two byte opcode for no-op (defaults to 0)
+#	DATA_ADDR - if end-of-text-plus-one-page isn't right for data start
+#	OTHER_READONLY_SECTIONS - other than .text .init .rodata ...
+#		(e.g., .PARISC.milli)
+#	OTHER_READWRITE_SECTIONS - other than .data .bss .ctors .sdata ...
+#		(e.g., .PARISC.global)
+#	OTHER_SECTIONS - at the end
+#	EXECUTABLE_SYMBOLS - symbols that must be defined for an
+#		executable (e.g., _DYNAMIC_LINK)
+#	TEXT_START_SYMBOLS - symbols that appear at the start of the
+#		.text section.
+#	DATA_START_SYMBOLS - symbols that appear at the start of the
+#		.data section.
+#	OTHER_BSS_SYMBOLS - symbols that appear at the start of the
+#		.bss section besides __bss_start.
+#
+# When adding sections, do note that the names of some sections are used
+# when specifying the start address of the next.
+#
+
+# We use a start address of __start for Irix 5, _start for other
+# targets.  This is for compatibility with Irix 5, and with old MIPS
+# ELF toolchains.
+if [ -z "$ENTRY" ]; then
+  case "${target_alias}" in
+  mips*-*-irix5*) ENTRY=__start ;;
+  *) ENTRY=_start ;;
+  esac
+fi
+
+test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
+test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
+test "$LD_FLAG" = "N" && DATA_ADDR=.
+INTERP=".interp   ${RELOCATING-0} : { *(.interp) 	}"
+cat <<EOF
+OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
+	      "${LITTLE_OUTPUT_FORMAT}")
+OUTPUT_ARCH(${ARCH})
+ENTRY(${ENTRY})
+
+${RELOCATING+${LIB_SEARCH_DIRS}}
+${RELOCATING+/* Do we need any of these for elf?
+   __DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}}  */}
+${RELOCATING+${EXECUTABLE_SYMBOLS}}
+${RELOCATING- /* For some reason, the Solaris linker makes bad executables
+  if gld -r is used and the intermediate file has sections starting
+  at non-zero addresses.  Could be a Solaris ld bug, could be a GNU ld
+  bug.  But for now assigning the zero vmas works.  */}
+SECTIONS
+{
+  /* Read-only sections, merged into text segment: */
+  ${CREATE_SHLIB-${RELOCATING+. = ${TEXT_START_ADDR} + SIZEOF_HEADERS;}}
+  ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR} + SIZEOF_HEADERS;}}
+  ${CREATE_SHLIB-${INTERP}}
+  .reginfo     ${RELOCATING-0} : { *(.reginfo) }
+  .dynamic     ${RELOCATING-0} : { *(.dynamic) }
+  .dynstr      ${RELOCATING-0} : { *(.dynstr)		}
+  .dynsym      ${RELOCATING-0} : { *(.dynsym)		}
+  .hash        ${RELOCATING-0} : { *(.hash)		}
+  .rel.text    ${RELOCATING-0} : { *(.rel.text)		}
+  .rela.text   ${RELOCATING-0} : { *(.rela.text) 	}
+  .rel.data    ${RELOCATING-0} : { *(.rel.data)		}
+  .rela.data   ${RELOCATING-0} : { *(.rela.data) 	}
+  .rel.rodata  ${RELOCATING-0} : { *(.rel.rodata) 	}
+  .rela.rodata ${RELOCATING-0} : { *(.rela.rodata) 	}
+  .rel.got     ${RELOCATING-0} : { *(.rel.got)		}
+  .rela.got    ${RELOCATING-0} : { *(.rela.got)		}
+  .rel.ctors   ${RELOCATING-0} : { *(.rel.ctors)	}
+  .rela.ctors  ${RELOCATING-0} : { *(.rela.ctors)	}
+  .rel.dtors   ${RELOCATING-0} : { *(.rel.dtors)	}
+  .rela.dtors  ${RELOCATING-0} : { *(.rela.dtors)	}
+  .rel.init    ${RELOCATING-0} : { *(.rel.init)	}
+  .rela.init   ${RELOCATING-0} : { *(.rela.init)	}
+  .rel.fini    ${RELOCATING-0} : { *(.rel.fini)	}
+  .rela.fini   ${RELOCATING-0} : { *(.rela.fini)	}
+  .rel.bss     ${RELOCATING-0} : { *(.rel.bss)		}
+  .rela.bss    ${RELOCATING-0} : { *(.rela.bss)		}
+  .rel.plt     ${RELOCATING-0} : { *(.rel.plt)		}
+  .rela.plt    ${RELOCATING-0} : { *(.rela.plt)		}
+  .rodata  ${RELOCATING-0} : { *(.rodata)  }
+  .rodata1 ${RELOCATING-0} : { *(.rodata1) }
+  .init        ${RELOCATING-0} : { *(.init)	} =${NOP-0}
+  .text    ${RELOCATING-0} :
+  {
+    ${CREATE_SHLIB-${RELOCATING+${TEXT_START_SYMBOLS}}}
+    *(.text)
+    *(.stub)
+    /* .gnu.warning sections are handled specially by elf32.em.  */
+    *(.gnu.warning)
+  } =${NOP-0}
+  ${CREATE_SHLIB-${RELOCATING+_etext = .;}}
+  ${CREATE_SHLIB-${RELOCATING+PROVIDE (etext = .);}}
+  .fini    ${RELOCATING-0} : { *(.fini)    } =${NOP-0}
+
+  /* Adjust the address for the data segment.  We want to adjust up to
+     the same address within the page on the next page up.  It would
+     be more correct to do this:
+       ${RELOCATING+. = ${DATA_ADDR-ALIGN(${MAXPAGESIZE})
+		+ ((ALIGN(8) + ${MAXPAGESIZE} - ALIGN(${MAXPAGESIZE}))
+		   & (${MAXPAGESIZE} - 1)};}
+     The current expression does not correctly handle the case of a
+     text segment ending precisely at the end of a page; it causes the
+     data segment to skip a page.  The above expression does not have
+     this problem, but it will currently (2/95) cause BFD to allocate
+     a single segment, combining both text and data, for this case.
+     This will prevent the text segment from being shared among
+     multiple executions of the program; I think that is more
+     important than losing a page of the virtual address space (note
+     that no actual memory is lost; the page which is skipped can not
+     be referenced).  */
+  ${CREATE_SHLIB-${RELOCATING+. += ${DATA_ADDR} - ${TEXT_START_ADDR};}}
+  ${CREATE_SHLIB+${RELOCATING+. += 0x10000;}}
+  .data  ${RELOCATING-0} :
+  {
+    ${CREATE_SHLIB-${RELOCATING+${DATA_START_SYMBOLS}}}
+    *(.data)
+    ${CONSTRUCTING+CONSTRUCTORS}
+  }
+  .data1 ${RELOCATING-0} : { *(.data1) }
+  .ctors       ${RELOCATING-0} : { *(.ctors)   }
+  .dtors       ${RELOCATING-0} : { *(.dtors)   }
+  ${RELOCATING+${OTHER_GOT_SYMBOLS}}
+  .got         ${RELOCATING-0} :
+  {
+    *(.got.plt) *(.got)
+   }
+  /* We want the small data sections together, so single-instruction offsets
+     can access them all, and initialized data all before uninitialized, so
+     we can shorten the on-disk segment size.  */
+  .sdata   ${RELOCATING-0} : { *(.sdata) }
+  ${RELOCATING+${OTHER_READWRITE_SECTIONS}}
+  ${CREATE_SHLIB-${RELOCATING+_edata  =  .;}}
+  ${CREATE_SHLIB-${RELOCATING+PROVIDE (edata = .);}}
+  ${CREATE_SHLIB-${RELOCATING+__bss_start = .;}}
+  ${CREATE_SHLIB-${RELOCATING+${OTHER_BSS_SYMBOLS}}}
+  .sbss    ${RELOCATING-0} : { *(.sbss) *(.scommon) }
+  .bss     ${RELOCATING-0} :
+  {
+   *(.dynbss)
+   *(.bss)
+   *(COMMON)
+  }
+  ${CREATE_SHLIB-${RELOCATING+_end = . ;}}
+  ${CREATE_SHLIB-${RELOCATING+PROVIDE (end = .);}}
+
+  /* These are needed for ELF backends which have not yet been
+     converted to the new style linker.  */
+  .stab 0 : { *(.stab) }
+  .stabstr 0 : { *(.stabstr) }
+
+  /* DWARF debug sections.
+     Symbols in the .debug DWARF section are relative to the beginning of the
+     section so we begin .debug at 0.  It's not clear yet what needs to happen
+     for the others.   */
+  .debug          0 : { *(.debug) }
+  .debug_srcinfo  0 : { *(.debug_srcinfo) }
+  .debug_aranges  0 : { *(.debug_aranges) }
+  .debug_pubnames 0 : { *(.debug_pubnames) }
+  .debug_sfnames  0 : { *(.debug_sfnames) }
+  .line           0 : { *(.line) }
+
+  /* These must appear regardless of ${RELOCATING}.  */
+  ${OTHER_SECTIONS}
+}
+EOF