[2.24] Modify linker script generation for MIPS Android

See dca628154da7b641772aad6e6e63325a642b9472 and
9adb6697703c230d1bded964b2fd2dceb80db2f3

Change-Id: Ia55791b46bbd1a509b12f2e1e37cdc5d7ec27754

4 files changed, 39 insertions, 29 deletions

diff --git a/binutils-2.24/ld/emulparams/elf32bmip.sh b/binutils-2.24/ld/emulparams/elf32bmip.sh
index 118d57a..2289685 100644
--- a/binutils-2.24/ld/emulparams/elf32bmip.sh
+++ b/binutils-2.24/ld/emulparams/elf32bmip.sh
@@ -6,7 +6,7 @@ SCRIPT_NAME=elf
 OUTPUT_FORMAT="elf32-bigmips"
 BIG_OUTPUT_FORMAT="elf32-bigmips"
 LITTLE_OUTPUT_FORMAT="elf32-littlemips"
-TEXT_START_ADDR=0x0400000
+TEXT_START_ADDR=0x80000
 test -n "${EMBEDDED}" || DATA_ADDR=0x10000000
 MAXPAGESIZE="CONSTANT (MAXPAGESIZE)"
 COMMONPAGESIZE="CONSTANT (COMMONPAGESIZE)"
@@ -64,12 +64,6 @@ OTHER_BSS_SYMBOLS='_fbss = .;'
 OTHER_SECTIONS='
   .gptab.sdata : { *(.gptab.data) *(.gptab.sdata) }
   .gptab.sbss : { *(.gptab.bss) *(.gptab.sbss) }
-  .mdebug.abi32 0 : { KEEP(*(.mdebug.abi32)) }
-  .mdebug.abiN32 0 : { KEEP(*(.mdebug.abiN32)) }
-  .mdebug.abi64 0 : { KEEP(*(.mdebug.abi64)) }
-  .mdebug.abiO64 0 : { KEEP(*(.mdebug.abiO64)) }
-  .mdebug.eabi32 0 : { KEEP(*(.mdebug.eabi32)) }
-  .mdebug.eabi64 0 : { KEEP(*(.mdebug.eabi64)) }
   .gcc_compiled_long32 0 : { KEEP(*(.gcc_compiled_long32)) }
   .gcc_compiled_long64 0 : { KEEP(*(.gcc_compiled_long64)) }
 '
diff --git a/binutils-2.24/ld/emulparams/elf32ltsmip.sh b/binutils-2.24/ld/emulparams/elf32ltsmip.sh
index 4a660f0..edf73df 100644
--- a/binutils-2.24/ld/emulparams/elf32ltsmip.sh
+++ b/binutils-2.24/ld/emulparams/elf32ltsmip.sh
@@ -1,2 +1,3 @@
 . ${srcdir}/emulparams/elf32btsmip.sh
 OUTPUT_FORMAT="elf32-tradlittlemips"
+unset TEXT_DYNAMIC
diff --git a/binutils-2.24/ld/genscripts.sh b/binutils-2.24/ld/genscripts.sh
index 61981bd..4f97c08 100755
--- a/binutils-2.24/ld/genscripts.sh
+++ b/binutils-2.24/ld/genscripts.sh
@@ -241,7 +241,8 @@ if [ "x${use_sysroot}" != "xyes" ] ; then
   fi
 fi
 
-LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
+# For Android, comment out LIB_SEARCH_DIRS.
+#LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
 
 # We need it for testsuite.
 set $EMULATION_LIBPATH
@@ -307,6 +308,7 @@ LD_FLAG=
 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
 RELOCATING=" "
 ( echo "/* Default linker script, for normal executables */"
+  echo "/* Modified for Android.  */"
   . ${CUSTOMIZER_SCRIPT}
   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.x
@@ -360,6 +362,7 @@ if test -n "$GENERATE_SHLIB_SCRIPT"; then
     DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
     COMBRELOC=ldscripts/${EMULATION_NAME}.xsc.tmp
     ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
+      echo "/* Modified for Android.  */"
       . ${CUSTOMIZER_SCRIPT}
       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
     ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xsc
diff --git a/binutils-2.24/ld/scripttempl/elf.sc b/binutils-2.24/ld/scripttempl/elf.sc
index e8126cb..6743f7c 100644
--- a/binutils-2.24/ld/scripttempl/elf.sc
+++ b/binutils-2.24/ld/scripttempl/elf.sc
@@ -122,7 +122,9 @@ DATA_SEGMENT_ALIGN="ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1))"
 DATA_SEGMENT_RELRO_END=""
 DATA_SEGMENT_END=""
 if test -n "${COMMONPAGESIZE}"; then
-  DATA_SEGMENT_ALIGN="ALIGN (${SEGMENT_SIZE}) - ((${MAXPAGESIZE} - .) & (${MAXPAGESIZE} - 1)); . = DATA_SEGMENT_ALIGN (${MAXPAGESIZE}, ${COMMONPAGESIZE})"
+  #DATA_SEGMENT_ALIGN="ALIGN (${SEGMENT_SIZE}) - ((${MAXPAGESIZE} - .) & (${MAXPAGESIZE} - 1)); . = DATA_SEGMENT_ALIGN (${MAXPAGESIZE}, ${COMMONPAGESIZE})"
+  # For Android, we align at exactly a page boundary.
+  DATA_SEGMENT_ALIGN="ALIGN (${SEGMENT_SIZE}); . = DATA_SEGMENT_ALIGN (${MAXPAGESIZE}, ${COMMONPAGESIZE})"
   DATA_SEGMENT_END=". = DATA_SEGMENT_END (.);"
   DATA_SEGMENT_RELRO_END=". = DATA_SEGMENT_RELRO_END (${SEPARATE_GOTPLT-0}, .);"
 fi
@@ -160,7 +162,7 @@ RELA_IPLT=".rela.iplt    ${RELOCATING-0} :
 DYNAMIC=".dynamic      ${RELOCATING-0} : { *(.dynamic) }"
 RODATA=".${RODATA_NAME}       ${RELOCATING-0} : { *(.${RODATA_NAME}${RELOCATING+ .${RODATA_NAME}.* .gnu.linkonce.r.*}) }"
 DATARELRO=".data.rel.ro : { *(.data.rel.ro.local* .gnu.linkonce.d.rel.ro.local.*) *(.data.rel.ro .data.rel.ro.* .gnu.linkonce.d.rel.ro.*) }"
-DISCARDED="/DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) *(.gnu.lto_*) }"
+DISCARDED="/DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) *(.gnu.lto_*) *(.mdebug.*) }"
 if test -z "${NO_SMALL_DATA}"; then
   SBSS=".${SBSS_NAME}         ${RELOCATING-0} :
   {
@@ -245,17 +247,15 @@ else
 fi
 INIT_ARRAY=".init_array   ${RELOCATING-0} :
   {
-    ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__init_array_start = .);}}
+    KEEP (*crtbegin*.o(.init_array))
     ${SORT_INIT_ARRAY}
     KEEP (*(.init_array ${CTORS_IN_INIT_ARRAY}))
-    ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__init_array_end = .);}}
   }"
 FINI_ARRAY=".fini_array   ${RELOCATING-0} :
   {
-    ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__fini_array_start = .);}}
+    KEEP (*crtbegin*.o(.fini_array))
     ${SORT_FINI_ARRAY}
     KEEP (*(.fini_array ${DTORS_IN_FINI_ARRAY}))
-    ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__fini_array_end = .);}}
   }"
 CTOR=".ctors        ${CONSTRUCTING-0} :
   {
@@ -271,14 +271,14 @@ CTOR=".ctors        ${CONSTRUCTING-0} :
        is in.  */
 
     KEEP (*crtbegin.o(.ctors))
-    KEEP (*crtbegin?.o(.ctors))
+    KEEP (*crtbegin*.o(.ctors))
 
     /* We don't want to include the .ctor section from
        the crtend.o file until after the sorted ctors.
        The .ctor section from the crtend file contains the
        end of ctors marker and it must be last */
 
-    KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .ctors))
+    KEEP (*(EXCLUDE_FILE (*crtend.o *crtend*.o $OTHER_EXCLUDE_FILES) .ctors))
     KEEP (*(SORT(.ctors.*)))
     KEEP (*(.ctors))
     ${CONSTRUCTING+${CTOR_END}}
@@ -287,8 +287,8 @@ DTOR=".dtors        ${CONSTRUCTING-0} :
   {
     ${CONSTRUCTING+${DTOR_START}}
     KEEP (*crtbegin.o(.dtors))
-    KEEP (*crtbegin?.o(.dtors))
-    KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors))
+    KEEP (*crtbegin*.o(.dtors))
+    KEEP (*(EXCLUDE_FILE (*crtend.o *crtend*.o $OTHER_EXCLUDE_FILES) .dtors))
     KEEP (*(SORT(.dtors.*)))
     KEEP (*(.dtors))
     ${CONSTRUCTING+${DTOR_END}}
@@ -299,8 +299,11 @@ STACK="  .stack        ${RELOCATING-0}${RELOCATING+${STACK_ADDR}} :
     *(.stack)
   }"
 
-TEXT_START_ADDR="SEGMENT_START(\"text-segment\", ${TEXT_START_ADDR})"
-SHLIB_TEXT_START_ADDR="SEGMENT_START(\"text-segment\", ${SHLIB_TEXT_START_ADDR:-0})"
+# For Android, remove SEGMENT_START.
+#TEXT_START_ADDR="SEGMENT_START(\"text-segment\", ${TEXT_START_ADDR})"
+#SHLIB_TEXT_START_ADDR="SEGMENT_START(\"text-segment\", ${SHLIB_TEXT_START_ADDR:-0})"
+TEXT_START_ADDR="${TEXT_START_ADDR}"
+SHLIB_TEXT_START_ADDR="0"
 
 if [ -z "$SEPARATE_CODE" ]; then
   SIZEOF_HEADERS_CODE=" + SIZEOF_HEADERS"
@@ -531,8 +534,8 @@ cat <<EOF
   .exception_ranges*) }
   ${TEXT_PLT+${PLT_NEXT_DATA+${PLT}}}
 
-  /* Adjust the address for the data segment.  We want to adjust up to
-     the same address within the page on the next page up.  */
+  /* Adjust the address for the data segment.  We want to align at exactly
+     a page boundary to make life easier for apriori. */
   ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}}
   ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
   ${CREATE_PIE+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
@@ -546,14 +549,23 @@ cat <<EOF
   .tdata	${RELOCATING-0} : { *(.tdata${RELOCATING+ .tdata.* .gnu.linkonce.td.*}) }
   .tbss		${RELOCATING-0} : { *(.tbss${RELOCATING+ .tbss.* .gnu.linkonce.tb.*})${RELOCATING+ *(.tcommon)} }
 
+  /* Ensure the __preinit_array_start label is properly aligned.  We
+     could instead move the label definition inside the section, but
+     the linker would then create the section even if it turns out to
+     be empty, which isn't pretty.  */
+  . = ALIGN(32 / 8);
+  ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__preinit_array_start = .);}}
   .preinit_array   ${RELOCATING-0} :
   {
-    ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__preinit_array_start = .);}}
     KEEP (*(.preinit_array))
-    ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__preinit_array_end = .);}}
   }
+  ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__preinit_array_end = .);}}
+  ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__init_array_start = .);}}
   ${RELOCATING+${INIT_ARRAY}}
+  ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__init_array_end = .);}}
+  ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__fini_array_start = .);}}
   ${RELOCATING+${FINI_ARRAY}}
+  ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__fini_array_end = .);}}
   ${SMALL_DATA_CTOR-${RELOCATING+${CTOR}}}
   ${SMALL_DATA_DTOR-${RELOCATING+${DTOR}}}
   .jcr          ${RELOCATING-0} : { KEEP (*(.jcr)) }
@@ -601,10 +613,8 @@ cat <<EOF
    *(COMMON)
    /* Align here to ensure that the .bss section occupies space up to
       _end.  Align after .bss to ensure correct alignment even if the
-      .bss section disappears because there are no input sections.
-      FIXME: Why do we need it? When there is no .bss section, we don't
-      pad the .data section.  */
-   ${RELOCATING+. = ALIGN(. != 0 ? ${ALIGNMENT} : 1);}
+      .bss section disappears because there are no input sections.  */
+   ${RELOCATING+. = ALIGN(${ALIGNMENT});}
   }
   ${OTHER_BSS_SECTIONS}
   ${LARGE_BSS_AFTER_BSS+${LARGE_BSS}}
@@ -623,7 +633,9 @@ SHLIB_LARGE_DATA_ADDR=". = SEGMENT_START(\"ldata-segment\", ${SHLIB_LARGE_DATA_A
   ${LARGE_BSS_AFTER_BSS-${LARGE_BSS}}
   ${RELOCATING+. = ALIGN(${ALIGNMENT});}
   ${RELOCATING+${OTHER_END_SYMBOLS}}
-  ${RELOCATING+${END_SYMBOLS-${USER_LABEL_PREFIX}_end = .; PROVIDE (${USER_LABEL_PREFIX}end = .);}}
+  ${RELOCATING+${END_SYMBOLS-${USER_LABEL_PREFIX}_end = .;
+  _bss_end__ = . ; __bss_end__ = . ; __end__ = . ;
+  PROVIDE (${USER_LABEL_PREFIX}end = .);}}
   ${RELOCATING+${DATA_SEGMENT_END}}
 EOF