[v6,0/6] linux-user/aarch64: Support PROT_BTI

Message

Richard Henderson June 5, 2019, 8:57 p.m. UTC

Dave Martin has recently posted a kernel patch set for 
supporting ARMv8.5 Branch Target Identification in userland.

  http://lists.infradead.org/pipermail/linux-arm-kernel/2019-May/654654.html

While that support is not yet in the upstream kernel, it looks
to be close to its final form.  Note that the patch set spells
this PROT_BTI_GUARDED, but review suggested to rename to PROT_BTI.

Changes since v5:
  * New function to validate the target PROT parameter for mmap/mprotect.
  * Require BTI in the cpu for PROT_BTI set.
  * Set PSTATE.BTYPE=2 for the signal handler.
    Adjust the smoke test to match.
  * Tidy up the note parsing.


r~


Richard Henderson (6):
  linux-user/aarch64: Reset btype for syscalls and signals
  linux-user: Validate mmap/mprotect prot value
  linux-user: Set PAGE_TARGET_1 for TARGET_PROT_BTI
  include/elf: Add defines related to notes for GNU systems
  linux-user: Parse NT_GNU_PROPERTY_TYPE_0 notes
  tests/tcg/aarch64: Add bti smoke test

 include/elf.h                     |  48 ++++++++++++
 include/exec/cpu-all.h            |   2 +
 linux-user/syscall_defs.h         |   4 +
 linux-user/aarch64/cpu_loop.c     |   7 ++
 linux-user/aarch64/signal.c       |  10 ++-
 linux-user/elfload.c              |  83 ++++++++++++++++++--
 linux-user/mmap.c                 | 122 ++++++++++++++++++++++--------
 target/arm/translate-a64.c        |   6 +-
 tests/tcg/aarch64/bti-1.c         |  77 +++++++++++++++++++
 tests/tcg/aarch64/bti-crt.inc.c   |  69 +++++++++++++++++
 tests/tcg/aarch64/Makefile.target |   3 +
 11 files changed, 387 insertions(+), 44 deletions(-)
 create mode 100644 tests/tcg/aarch64/bti-1.c
 create mode 100644 tests/tcg/aarch64/bti-crt.inc.c

Comments

[e-mail] June 5, 2019, 10:15 p.m. UTC | #1

Patchew URL: https://patchew.org/QEMU/[e-mail]/



Hi,

This series seems to have some coding style problems. See output below for
more information:

Subject: [Qemu-devel] [PATCH v6 0/6] linux-user/aarch64: Support PROT_BTI
Type: series
Message-id: [e-mail]

=== TEST SCRIPT BEGIN ===
#!/bin/bash
git rev-parse base > /dev/null || exit 0
git config --local diff.renamelimit 0
git config --local diff.renames True
git config --local diff.algorithm histogram
./scripts/checkpatch.pl --mailback base..
=== TEST SCRIPT END ===

From https://github.com/patchew-project/qemu
 * [new tag]               patchew/[e-mail] -> patchew/[e-mail]
Switched to a new branch 'test'
6038ce2e0e tests/tcg/aarch64: Add bti smoke test
b16ad5bd7b linux-user: Parse NT_GNU_PROPERTY_TYPE_0 notes
68fefef717 include/elf: Add defines related to notes for GNU systems
951669d523 linux-user: Set PAGE_TARGET_1 for TARGET_PROT_BTI
6ec44edda5 linux-user: Validate mmap/mprotect prot value
4eb77556ad linux-user/aarch64: Reset btype for syscalls and signals

=== OUTPUT BEGIN ===
1/6 Checking commit 4eb77556ad1e (linux-user/aarch64: Reset btype for syscalls and signals)
2/6 Checking commit 6ec44edda5a0 (linux-user: Validate mmap/mprotect prot value)
3/6 Checking commit 951669d5231b (linux-user: Set PAGE_TARGET_1 for TARGET_PROT_BTI)
4/6 Checking commit 68fefef717be (include/elf: Add defines related to notes for GNU systems)
5/6 Checking commit b16ad5bd7b5c (linux-user: Parse NT_GNU_PROPERTY_TYPE_0 notes)
6/6 Checking commit 6038ce2e0e44 (tests/tcg/aarch64: Add bti smoke test)
WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#33: 
new file mode 100644

ERROR: code indent should never use tabs
#50: FILE: tests/tcg/aarch64/bti-1.c:13:
+^Ihint^I#34\n\$

ERROR: code indent should never use tabs
#51: FILE: tests/tcg/aarch64/bti-1.c:14:
+^Ib^Iskip2_sigill2\n\$

ERROR: externs should be avoided in .c files
#133: FILE: tests/tcg/aarch64/bti-crt.inc.c:13:
+int main(void);

ERROR: code indent should never use tabs
#180: FILE: tests/tcg/aarch64/bti-crt.inc.c:60:
+^I.align^I3\n\$

ERROR: code indent should never use tabs
#181: FILE: tests/tcg/aarch64/bti-crt.inc.c:61:
+^I.long^I4\n\$

ERROR: code indent should never use tabs
#182: FILE: tests/tcg/aarch64/bti-crt.inc.c:62:
+        .long^I16\n\$

ERROR: code indent should never use tabs
#183: FILE: tests/tcg/aarch64/bti-crt.inc.c:63:
+        .long^I5\n\$

ERROR: code indent should never use tabs
#184: FILE: tests/tcg/aarch64/bti-crt.inc.c:64:
+        .string^I\"GNU\"\n\$

ERROR: code indent should never use tabs
#185: FILE: tests/tcg/aarch64/bti-crt.inc.c:65:
+^I.long^I0xc0000000\n\$

ERROR: code indent should never use tabs
#186: FILE: tests/tcg/aarch64/bti-crt.inc.c:66:
+^I.long^I4\n\$

ERROR: code indent should never use tabs
#187: FILE: tests/tcg/aarch64/bti-crt.inc.c:67:
+^I.long^I1\n\$

ERROR: code indent should never use tabs
#189: FILE: tests/tcg/aarch64/bti-crt.inc.c:69:
+^I.previous");$

total: 12 errors, 1 warnings, 153 lines checked

Patch 6/6 has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.

=== OUTPUT END ===

Test command exited with code: 1


The full log is available at
http://patchew.org/logs/[e-mail]/testing.checkpatch/?type=message.
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