mbox series

[v11,00/12] linux-user: User support for AArch64 BTI

Message ID 20201016184207.786698-1-richard.henderson@linaro.org
Headers show
Series linux-user: User support for AArch64 BTI | expand

Message

Richard Henderson Oct. 16, 2020, 6:41 p.m. UTC
The kernel abi for this was merged in v5.8, just as the qemu 5.1
merge window was closing, so this slipped to the next dev cycle.

Changes from v10:
  * Include Phil's plug of interp_name memory leak.
  * Convert error reporting to Error api.
  * Mirror the kernel's code structure for parsing notes
    (though Error means that it's not exactly the same).
  * Split aarch64 stuff from basic note parsing patch.

Changes from v9:
  * Split what is now patch 7 into 3 more (pmm).
  * All prerequisites are now upstream.


r~


Philippe Mathieu-Daudé (1):
  linux-user/elfload: Avoid leaking interp_name using GLib memory API

Richard Henderson (11):
  linux-user/aarch64: Reset btype for signals
  linux-user: Set PAGE_TARGET_1 for TARGET_PROT_BTI
  include/elf: Add defines related to GNU property notes for AArch64
  linux-user/elfload: Fix coding style in load_elf_image
  linux-user/elfload: Adjust iteration over phdr
  linux-user/elfload: Move PT_INTERP detection to first loop
  linux-user/elfload: Use Error for load_elf_image
  linux-user/elfload: Use Error for load_elf_interp
  linux-user/elfload: Parse NT_GNU_PROPERTY_TYPE_0 notes
  linux-user/elfload: Parse GNU_PROPERTY_AARCH64_FEATURE_1_AND
  tests/tcg/aarch64: Add bti smoke tests

 include/elf.h                     |  22 ++
 include/exec/cpu-all.h            |   2 +
 linux-user/qemu.h                 |   4 +
 linux-user/syscall_defs.h         |   4 +
 target/arm/cpu.h                  |   5 +
 linux-user/aarch64/signal.c       |  10 +-
 linux-user/elfload.c              | 326 +++++++++++++++++++++++++-----
 linux-user/mmap.c                 |  16 ++
 target/arm/translate-a64.c        |   6 +-
 tests/tcg/aarch64/bti-1.c         |  62 ++++++
 tests/tcg/aarch64/bti-2.c         | 108 ++++++++++
 tests/tcg/aarch64/bti-crt.inc.c   |  51 +++++
 tests/tcg/aarch64/Makefile.target |  10 +
 tests/tcg/configure.sh            |   4 +
 14 files changed, 569 insertions(+), 61 deletions(-)
 create mode 100644 tests/tcg/aarch64/bti-1.c
 create mode 100644 tests/tcg/aarch64/bti-2.c
 create mode 100644 tests/tcg/aarch64/bti-crt.inc.c

Comments

no-reply@patchew.org Oct. 16, 2020, 7:06 p.m. UTC | #1
Patchew URL: https://patchew.org/QEMU/20201016184207.786698-1-richard.henderson@linaro.org/



Hi,

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

Type: series
Message-id: 20201016184207.786698-1-richard.henderson@linaro.org
Subject: [PATCH v11 00/12] linux-user: User support for AArch64 BTI

=== 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 ===

Updating 3c8cf5a9c21ff8782164d1def7f44bd888713384
From https://github.com/patchew-project/qemu
 * [new tag]         patchew/20201016184207.786698-1-richard.henderson@linaro.org -> patchew/20201016184207.786698-1-richard.henderson@linaro.org
Switched to a new branch 'test'
adddebd tests/tcg/aarch64: Add bti smoke tests
6de9e12 linux-user/elfload: Parse GNU_PROPERTY_AARCH64_FEATURE_1_AND
9b05077 linux-user/elfload: Parse NT_GNU_PROPERTY_TYPE_0 notes
e063fde linux-user/elfload: Use Error for load_elf_interp
5fa6305 linux-user/elfload: Use Error for load_elf_image
0bdf3b9 linux-user/elfload: Move PT_INTERP detection to first loop
3192943 linux-user/elfload: Adjust iteration over phdr
d35ac0e linux-user/elfload: Fix coding style in load_elf_image
f1019c0 linux-user/elfload: Avoid leaking interp_name using GLib memory API
46b8e04 include/elf: Add defines related to GNU property notes for AArch64
15162b4 linux-user: Set PAGE_TARGET_1 for TARGET_PROT_BTI
49ed74b linux-user/aarch64: Reset btype for signals

=== OUTPUT BEGIN ===
1/12 Checking commit 49ed74bc1aee (linux-user/aarch64: Reset btype for signals)
2/12 Checking commit 15162b4dcbec (linux-user: Set PAGE_TARGET_1 for TARGET_PROT_BTI)
3/12 Checking commit 46b8e04781a1 (include/elf: Add defines related to GNU property notes for AArch64)
4/12 Checking commit f1019c0416c3 (linux-user/elfload: Avoid leaking interp_name using GLib memory API)
5/12 Checking commit d35ac0e1930b (linux-user/elfload: Fix coding style in load_elf_image)
6/12 Checking commit 3192943b8d75 (linux-user/elfload: Adjust iteration over phdr)
7/12 Checking commit 0bdf3b9c07f6 (linux-user/elfload: Move PT_INTERP detection to first loop)
8/12 Checking commit 5fa63056e084 (linux-user/elfload: Use Error for load_elf_image)
9/12 Checking commit e063fde7d4b1 (linux-user/elfload: Use Error for load_elf_interp)
10/12 Checking commit 9b05077fa2ed (linux-user/elfload: Parse NT_GNU_PROPERTY_TYPE_0 notes)
11/12 Checking commit 6de9e12b2adf (linux-user/elfload: Parse GNU_PROPERTY_AARCH64_FEATURE_1_AND)
12/12 Checking commit adddebd8a702 (tests/tcg/aarch64: Add bti smoke tests)
WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#37: 
new file mode 100644

ERROR: externs should be avoided in .c files
#165: FILE: tests/tcg/aarch64/bti-2.c:56:
+extern char test_begin[], test_end[];

ERROR: use qemu_real_host_page_size instead of getpagesize()
#199: FILE: tests/tcg/aarch64/bti-2.c:90:
+    void *p = mmap(0, getpagesize(),

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

total: 3 errors, 1 warnings, 247 lines checked

Patch 12/12 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/20201016184207.786698-1-richard.henderson@linaro.org/testing.checkpatch/?type=message.
---
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Please send your feedback to patchew-devel@redhat.com
Peter Maydell Oct. 20, 2020, 2:59 p.m. UTC | #2
On Fri, 16 Oct 2020 at 19:42, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> The kernel abi for this was merged in v5.8, just as the qemu 5.1
> merge window was closing, so this slipped to the next dev cycle.
>
> Changes from v10:
>   * Include Phil's plug of interp_name memory leak.
>   * Convert error reporting to Error api.
>   * Mirror the kernel's code structure for parsing notes
>     (though Error means that it's not exactly the same).
>   * Split aarch64 stuff from basic note parsing patch.
>
> Changes from v9:
>   * Split what is now patch 7 into 3 more (pmm).
>   * All prerequisites are now upstream.
>



Applied to target-arm.next, thanks.

-- PMM
Peter Maydell Oct. 20, 2020, 8:09 p.m. UTC | #3
On Fri, 16 Oct 2020 at 19:42, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> The kernel abi for this was merged in v5.8, just as the qemu 5.1
> merge window was closing, so this slipped to the next dev cycle.
>
> Changes from v10:
>   * Include Phil's plug of interp_name memory leak.
>   * Convert error reporting to Error api.
>   * Mirror the kernel's code structure for parsing notes
>     (though Error means that it's not exactly the same).
>   * Split aarch64 stuff from basic note parsing patch.
>
> Changes from v9:
>   * Split what is now patch 7 into 3 more (pmm).
>   * All prerequisites are now upstream.

Unfortunately the bti-2 test dumps core (x86-64 Linux host):

make[2]: Entering directory
'/home/petmay01/linaro/qemu-for-merges/build/all-linux-static/tests/tcg/aarch64-linux-user'
timeout 60  /home/petmay01/linaro/qemu-for-merges/build/all-linux-static/qemu-aarch64
-cpu max pauth-5 >  pauth-5.out
make[2]: Leaving directory
'/home/petmay01/linaro/qemu-for-merges/build/all-linux-static/tests/tcg/aarch64-linux-user'
make[2]: Entering directory
'/home/petmay01/linaro/qemu-for-merges/build/all-linux-static/tests/tcg/aarch64-linux-user'
timeout 60  /home/petmay01/linaro/qemu-for-merges/build/all-linux-static/qemu-aarch64
 bti-2 >  bti-2.out
qemu: uncaught target signal 11 (Segmentation fault) - core dumped
timeout: the monitored command dumped core
Segmentation fault
../Makefile.target:152: recipe for target 'run-bti-2' failed
make[2]: *** [run-bti-2] Error 139
make[2]: Leaving directory
'/home/petmay01/linaro/qemu-for-merges/build/all-linux-static/tests/tcg/aarch64-linux-user'
/home/petmay01/linaro/qemu-for-merges/tests/tcg/Makefile.qemu:85:
recipe for target 'run-guest-tests' failed
make[1]: *** [run-guest-tests] Error 2
/home/petmay01/linaro/qemu-for-merges/tests/Makefile.include:61:
recipe for target 'run-tcg-tests-aarch64-linux-user' failed
make: *** [run-tcg-tests-aarch64-linux-user] Error 2

I've dropped the series from the pullreq.

thanks
-- PMM
Richard Henderson Oct. 21, 2020, 5:04 p.m. UTC | #4
On 10/20/20 1:09 PM, Peter Maydell wrote:
> On Fri, 16 Oct 2020 at 19:42, Richard Henderson
> <richard.henderson@linaro.org> wrote:
>>
>> The kernel abi for this was merged in v5.8, just as the qemu 5.1
>> merge window was closing, so this slipped to the next dev cycle.
>>
>> Changes from v10:
>>   * Include Phil's plug of interp_name memory leak.
>>   * Convert error reporting to Error api.
>>   * Mirror the kernel's code structure for parsing notes
>>     (though Error means that it's not exactly the same).
>>   * Split aarch64 stuff from basic note parsing patch.
>>
>> Changes from v9:
>>   * Split what is now patch 7 into 3 more (pmm).
>>   * All prerequisites are now upstream.
> 
> Unfortunately the bti-2 test dumps core (x86-64 Linux host):

This is odd.  Works on my laptop,

  TEST    pauth-1 on aarch64
  TEST    pauth-2 on aarch64
  TEST    pauth-4 on aarch64
  TEST    pauth-5 on aarch64
  TEST    bti-1 on aarch64
  TEST    bti-2 on aarch64
  TEST    semihosting on aarch64

However, this crashes on an aarch64 host.  Looking at the trace, the compiler
generated bad code -- the difference of two symbols resulted in 0.  So we never
copied the test code to the mmaped page.

I assume your x86_64 build is using the docker images for cross-compile?  I
wonder if my laptop is picking up a local cross-compiler instead.  And then the
aarch64 host compiler has the same problem as the docker version?


r~