Remove some custom sections from RISC-V's default linker scripts

This was added so compressed loads could have smaller offsets for
accessing the data section, but the result was that writable sections
ended up in INITIAL_READONLY_SECTIONS.  This is a bad idea.  The fix is
to just remove this micro-optimization.

Thanks to Alan Morda for finding the problem!

ld/ChangeLog

2017-01-09  Palmer Dabbelt <palmer@dabbelt.com>
            Kito Cheng <kito.cheng@gmail.com>

        * emulparams/elf32lriscv-defs.sh (INITIAL_READONLY_SECTIONS):
        Removed.
        (SDATA_START_SYMBOLS): Likewise.

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 72c9db2e93a6242be833508cfcf7e6e423199fa3..266f22e6f33382e34da8fab4bfbec6f9b2ff6154 100644 (file)
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -11,6 +11,13 @@
        * testsuite/gas/i386/x86-64-avx512_vpopcntdqd.d: Ditto.
        * testsuite/gas/i386/x86-64-avx512_vpopcntdqd.s: Ditto.
 
+2017-01-09  Palmer Dabbelt <palmer@dabbelt.com>
+           Kito Cheng <kito.cheng@gmail.com>
+
+       * emulparams/elf32lriscv-defs.sh (INITIAL_READONLY_SECTIONS):
+       Removed.
+       (SDATA_START_SYMBOLS): Likewise.
+
 2017-01-09  Andrew Waterman <andrew@sifive.com>
 
        * config/tc-riscv.c (relaxed_branch_length): Use the long

diff --git a/ld/emulparams/elf32lriscv-defs.sh b/ld/emulparams/elf32lriscv-defs.sh
index 0e4b7237ff35c067abe5d3a0df83900db858e23d..0eba0d1a0cb39a082b4022b64b9a9145da6213b3 100644 (file)
--- a/ld/emulparams/elf32lriscv-defs.sh
+++ b/ld/emulparams/elf32lriscv-defs.sh
@@ -26,17 +26,5 @@ COMMONPAGESIZE="CONSTANT (COMMONPAGESIZE)"
 SDATA_START_SYMBOLS="_gp = . + 0x800;
     *(.srodata.cst16) *(.srodata.cst8) *(.srodata.cst4) *(.srodata.cst2) *(.srodata .srodata.*)"
 
-# Place the data section before text section.  This enables more compact
-# global variable access for RVC code via linker relaxation.
-INITIAL_READONLY_SECTIONS="
-  .data           : { *(.data) *(.data.*) *(.gnu.linkonce.d.*) }
-  .rodata         : { *(.rodata) *(.rodata.*) *(.gnu.linkonce.r.*) }
-  .srodata        : { ${SDATA_START_SYMBOLS} }
-  .sdata          : { *(.sdata .sdata.* .gnu.linkonce.s.*) }
-  .sbss           : { *(.dynsbss) *(.sbss .sbss.* .gnu.linkonce.sb.*) }
-  .bss            : { *(.dynbss) *(.bss .bss.* .gnu.linkonce.b.*) *(COMMON) }
-  . = ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1));"
 INITIAL_READONLY_SECTIONS=".interp         : { *(.interp) } ${CREATE_PIE-${INITIAL_READONLY_SECTIONS}}"
 INITIAL_READONLY_SECTIONS="${RELOCATING+${CREATE_SHLIB-${INITIAL_READONLY_SECTIONS}}}"
-
-SDATA_START_SYMBOLS="${CREATE_PIE+${SDATA_START_SYMBOLS}}"