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080a488354
This fixes a problem originally reported at
https://github.com/riscv/riscv-binutils-gdb/issues/173
If you have code linked at address zero, you can have a lui instruction
loading a value 0x800 which gets relaxed to a c.lui which is valid (c.lui 0x1
followed by addi -0x800). Relaxation can reduce the value below 0x800 at which
point the c.lui 0x0 is no longer valid. We can fix this by converting the
c.lui to a c.li which can load 0.
bfd/
* elfnn-riscv.c (perform_relocation) <R_RISCV_RVC_LUI>: If
RISCV_CONST_HIGH_PART (value) is zero, then convert c.lui instruction
to c.li instruction, and use ENCODE_RVC_IMM to set value.
ld/
* testsuite/ld-riscv-elf/c-lui-2.d: New.
* testsuite/ld-riscv-elf/c-lui-2.ld: New.
* testsuite/ld-riscv-elf/c-lui-2.s: New.
* testsuite/ld-riscv-elf/ld-riscv-elf.exp: Run the c-lui-2 test.
75 lines
2.7 KiB
Plaintext
75 lines
2.7 KiB
Plaintext
# Expect script for RISC-V ELF linker tests
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# Copyright (C) 2017-2019 Free Software Foundation, Inc.
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#
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# This file is part of the GNU Binutils.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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# MA 02110-1301, USA.
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#
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if [istarget "riscv*-*-*"] {
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run_dump_test "c-lui"
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run_dump_test "c-lui-2"
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run_dump_test "disas-jalr"
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run_dump_test "pcrel-lo-addend"
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run_dump_test "pcrel-lo-addend-2"
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run_dump_test "attr-merge-arch-01"
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run_dump_test "attr-merge-arch-02"
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run_dump_test "attr-merge-arch-03"
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run_dump_test "attr-merge-strict-align-01"
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run_dump_test "attr-merge-strict-align-02"
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run_dump_test "attr-merge-strict-align-03"
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run_dump_test "attr-merge-strict-align-04"
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run_dump_test "attr-merge-strict-align-05"
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run_dump_test "attr-merge-stack-align"
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run_dump_test "attr-merge-priv-spec"
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run_dump_test "attr-merge-arch-failed-01"
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run_dump_test "attr-merge-stack-align-failed"
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run_ld_link_tests {
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{ "Weak reference 32" "-T weakref.ld -melf32lriscv" ""
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"-march=rv32i -mabi=ilp32" {weakref32.s}
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{{objdump -d weakref32.d}} "weakref32"}
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{ "Weak reference 64" "-T weakref.ld -melf64lriscv" ""
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"-march=rv64i -mabi=lp64" {weakref64.s}
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{{objdump -d weakref64.d}} "weakref64"}
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}
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# The following tests require shared library support.
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if ![check_shared_lib_support] {
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return
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}
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set abis { rv32gc ilp32 elf32lriscv rv64gc lp64 elf64lriscv }
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foreach { arch abi emul } $abis {
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# This checks whether our linker scripts handle __global_pointer$
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# correctly. It should be defined in executables and PIE, but not
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# in shared libraries.
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set suff64 [string map {ilp32 "" lp64 -64} $abi]
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run_ld_link_tests [list \
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[list "gp test ($abi shared library)" \
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"-m$emul -shared" "" \
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"-march=$arch -mabi=$abi -fpic" \
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{ gp-test.s } \
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[list "readelf --syms gp-test-lib.sd"] \
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"gp-test-lib-${abi}.so"] \
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[list "gp test ($abi executable)" \
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"-m$emul" "" \
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"-march=$arch -mabi=$abi" \
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{ gp-test.s } \
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[list "readelf --syms gp-test.sd"] \
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"gp-test-${abi}"]]
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}
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}
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