RISC-V: Protect .got with relro

Move .got before .data so that it can be protected with -zrelro.  Also
separate .got.plt from .got if -znow is not in effect; the first two words
of .got.plt are placed within the relro region.

ld:
	PR ld/30877
	* emulparams/elf32lriscv-defs.sh (DATA_GOT, SEPARATE_GOTPLT):
	Define.
	* emulparams/elf64lriscv-defs.sh (SEPARATE_GOTPLT): Define.
	* testsuite/ld-elf/binutils.exp (binutils_test): Remove riscv*-*-*
	from relro_got expression.

(cherry picked from commit 7345d05aafde53a48d5a587a6d9c1778db78e0f3)

Change-Id: I6c6c9e54752d1c6076d5f1d32a9d25b8cf85dc09

diff --git a/ld/emulparams/elf32lriscv-defs.sh b/ld/emulparams/elf32lriscv-defs.sh
index b823ced..0165561 100644 (file)
--- a/ld/emulparams/elf32lriscv-defs.sh
+++ b/ld/emulparams/elf32lriscv-defs.sh
@@ -47,3 +47,7 @@ INITIAL_READONLY_SECTIONS="${RELOCATING+${CREATE_SHLIB-${INITIAL_READONLY_SECTIO
 OTHER_END_SYMBOLS="${CREATE_SHLIB-__BSS_END__ = .;
     __global_pointer$ = MIN(__SDATA_BEGIN__ + 0x800,
                            MAX(__DATA_BEGIN__ + 0x800, __BSS_END__ - 0x800));}"
+
+# Put .got before .data
+DATA_GOT=" "
+SEPARATE_GOTPLT="SIZEOF (.got.plt) >= 8 ? 8 : 0"

diff --git a/ld/emulparams/elf64lriscv-defs.sh b/ld/emulparams/elf64lriscv-defs.sh
index 84a700a..ca15338 100644 (file)
--- a/ld/emulparams/elf64lriscv-defs.sh
+++ b/ld/emulparams/elf64lriscv-defs.sh
@@ -1,2 +1,3 @@
 source_sh ${srcdir}/emulparams/elf32lriscv-defs.sh
 ELFSIZE=64
+SEPARATE_GOTPLT="SIZEOF (.got.plt) >= 16 ? 16 : 0"

diff --git a/ld/testsuite/ld-elf/binutils.exp b/ld/testsuite/ld-elf/binutils.exp
index 674e8e9..b38e29e 100644 (file)
--- a/ld/testsuite/ld-elf/binutils.exp
+++ b/ld/testsuite/ld-elf/binutils.exp
@@ -95,7 +95,6 @@ proc binutils_test { prog_name ld_options test {test_name ""} {readelf_options "
                              || [istarget "mips*-*-*"] \
                              || [istarget "nios2*-*-*"] \
                              || [istarget "or1k-*-*"] \
-                             || [istarget "riscv*-*-*"] \
                              || [istarget "sh*-*-*"] \
                              || [istarget "x86_64-*-rdos*"])]
        # Check if GNU_RELRO segment is generated.