From 92cebb3dbea282bbf7357ed2f3f03bc92fee8c7b Mon Sep 17 00:00:00 2001 From: "Maciej W. Rozycki" Date: Fri, 30 Jun 2017 00:55:07 +0100 Subject: [PATCH] MIPS/GAS: Clear the ASE_MIPS16E2_MT flag for recalculation Correct a commit 25499ac7ee92 ("MIPS16e2: Add MIPS16e2 ASE support") GAS bug with the handling of the ASE_MIPS16E2_MT combination ASE flag, which is not correctly calculated as `.set nomips16e2' and `.set nomt' pseudo-ops are processed. This leads to code like: $ cat foo.s .set nomt evpe .align 4, 0 $ cat bar.s .set nomips16e2 dvpe .align 4, 0 $ to successfully assemble where it should not: $ as -32 -mips32r3 -mmt -mips16 -mmips16e2 -o foo.o foo.s $ as -32 -mips32r3 -mmt -mips16 -mmips16e2 -o bar.o bar.s $ objdump -m mips:16 -d foo.o foo.o: file format elf32-tradbigmips Disassembly of section .text: 00000000 <.text>: 0: f027 6700 evpe ... bar.o: file format elf32-tradbigmips Disassembly of section .text: 00000000 <.text>: 0: f026 6700 dvpe ... $ This happens because ASE_MIPS16E2_MT once set in `mips_set_ase' is never cleared. Fix the problem by clearing it there before it is calculated based on the ASE_MT and ASE_MIPS16E2 flags, making assembly fail as expected: $ as -32 -mips32r3 -mmt -mips16 -mmips16e2 -o foo.o foo.s foo.s: Assembler messages: foo.s:2: Error: opcode not supported on this processor: mips32r3 (mips32r3) `evpe' $ as -32 -mips32r3 -mmt -mips16 -mmips16e2 -o bar.o bar.s bar.s: Assembler messages: bar.s:2: Error: opcode not supported on this processor: mips32r3 (mips32r3) `dvpe' $ gas/ * config/tc-mips.c (mips_set_ase): Clear the ASE_MIPS16E2_MT flag before recalculating. * testsuite/gas/mips/mips16e2-mt-err.d: New test. * testsuite/gas/mips/mips16e2-mt-err.l: New stderr output. * testsuite/gas/mips/mips16e2-mt-err.s: New test source. * testsuite/gas/mips/mips.exp: Run the new test. --- gas/ChangeLog | 9 +++++++++ gas/config/tc-mips.c | 5 +++++ gas/testsuite/gas/mips/mips.exp | 1 + gas/testsuite/gas/mips/mips16e2-mt-err.d | 3 +++ gas/testsuite/gas/mips/mips16e2-mt-err.l | 3 +++ gas/testsuite/gas/mips/mips16e2-mt-err.s | 14 ++++++++++++++ 6 files changed, 35 insertions(+) create mode 100644 gas/testsuite/gas/mips/mips16e2-mt-err.d create mode 100644 gas/testsuite/gas/mips/mips16e2-mt-err.l create mode 100644 gas/testsuite/gas/mips/mips16e2-mt-err.s diff --git a/gas/ChangeLog b/gas/ChangeLog index 92d1f86..43a7528 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,3 +1,12 @@ +2017-06-29 Maciej W. Rozycki + + * config/tc-mips.c (mips_set_ase): Clear the ASE_MIPS16E2_MT + flag before recalculating. + * testsuite/gas/mips/mips16e2-mt-err.d: New test. + * testsuite/gas/mips/mips16e2-mt-err.l: New stderr output. + * testsuite/gas/mips/mips16e2-mt-err.s: New test source. + * testsuite/gas/mips/mips.exp: Run the new test. + 2017-06-28 Tamar Christina * config/tc-aarch64.c (aarch64_reg_parse_32_64): Accept 4B. diff --git a/gas/config/tc-mips.c b/gas/config/tc-mips.c index d7a1ff3..d06143a 100644 --- a/gas/config/tc-mips.c +++ b/gas/config/tc-mips.c @@ -2130,6 +2130,11 @@ mips_set_ase (const struct mips_ase *ase, struct mips_set_options *opts, mask = mips_ase_mask (ase->flags); opts->ase &= ~mask; + + /* Clear combination ASE flags, which need to be recalculated based on + updated regular ASE settings. */ + opts->ase &= ~ASE_MIPS16E2_MT; + if (enabled_p) opts->ase |= ase->flags; diff --git a/gas/testsuite/gas/mips/mips.exp b/gas/testsuite/gas/mips/mips.exp index 4d327f5..26d29e4 100644 --- a/gas/testsuite/gas/mips/mips.exp +++ b/gas/testsuite/gas/mips/mips.exp @@ -1403,6 +1403,7 @@ if { [istarget mips*-*-vxworks*] } { run_dump_test "mips16e-jrc" run_dump_test "mips16e2-lui" + run_dump_test "mips16e2-mt-err" run_dump_test "mips16e2-copy" run_dump_test "mips16e2-copy-err" diff --git a/gas/testsuite/gas/mips/mips16e2-mt-err.d b/gas/testsuite/gas/mips/mips16e2-mt-err.d new file mode 100644 index 0000000..4dc0e99 --- /dev/null +++ b/gas/testsuite/gas/mips/mips16e2-mt-err.d @@ -0,0 +1,3 @@ +#name: MIPS16e2 MT ASE instruction errors +#as: -32 -mips16 -mips32r2 -mmips16e2 -mmt +#error-output: mips16e2-mt-err.l diff --git a/gas/testsuite/gas/mips/mips16e2-mt-err.l b/gas/testsuite/gas/mips/mips16e2-mt-err.l new file mode 100644 index 0000000..d9eb9b3 --- /dev/null +++ b/gas/testsuite/gas/mips/mips16e2-mt-err.l @@ -0,0 +1,3 @@ +.*: Assembler messages: +.*:8: Error: opcode not supported on this processor: mips32r2 \(mips32r2\) `dvpe' +.*:12: Error: opcode not supported on this processor: mips32r2 \(mips32r2\) `dvpe' diff --git a/gas/testsuite/gas/mips/mips16e2-mt-err.s b/gas/testsuite/gas/mips/mips16e2-mt-err.s new file mode 100644 index 0000000..78b43f4 --- /dev/null +++ b/gas/testsuite/gas/mips/mips16e2-mt-err.s @@ -0,0 +1,14 @@ +# Verify that switching off either `mips16e2' or `mt' causes an assembly +# error with a MIPS16e2 MT ASE instruction, which requires both at a time. + + .text +foo: + evpe + .set nomips16e2 + dvpe + .set mips16e2 + evpe + .set nomt + dvpe + .set mt + evpe -- 2.7.4