[v1] Mirror map JIT memory for TCG

[PATCH RESEND 0/4] Mirror map JIT memory for TCG

Joelle van Dyne posted 4 patches 5 years ago

Diff against v1 v2 v3 v4 v5
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git fetch https://github.com/patchew-project/qemu tags/patchew/20201026191540.12434-1-j@getutm.app

Maintainers: Richard Henderson <rth@twiddle.net>, Laurent Vivier <laurent@vivier.eu>, Aurelien Jarno <aurelien@aurel32.net>, Aleksandar Rikalo <aleksandar.rikalo@syrmia.com>, Stefan Weil <sw@weilnetz.de>, Alistair Francis <Alistair.Francis@wdc.com>, Andrzej Zaborowski <balrogg@gmail.com>, Huacai Chen <chenhc@lemote.com>, "Philippe Mathieu-Daudé" <f4bug@amsat.org>, Paolo Bonzini <pbonzini@redhat.com>, Richard Henderson <richard.henderson@linaro.org>, Jiaxun Yang <jiaxun.yang@flygoat.com>, Palmer Dabbelt <palmer@dabbelt.com>

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configure                    |  13 +++++
meson.build                  |   1 +
include/exec/exec-all.h      |   8 +++
include/sysemu/tcg.h         |   2 +-
include/tcg/tcg.h            |  26 +++++++--
tcg/aarch64/tcg-target.h     |  18 +++++-
tcg/arm/tcg-target.h         |  15 ++++-
tcg/i386/tcg-target.h        |  26 ++++++++-
tcg/mips/tcg-target.h        |  12 +++-
tcg/ppc/tcg-target.h         |  12 +++-
tcg/riscv/tcg-target.h       |  13 ++++-
tcg/s390/tcg-target.h        |  17 +++++-
tcg/sparc/tcg-target.h       |  12 +++-
tcg/tci/tcg-target.h         |   9 ++-
accel/tcg/cpu-exec.c         |   7 ++-
accel/tcg/tcg-all.c          |  31 +++++++++-
accel/tcg/translate-all.c    | 106 +++++++++++++++++++++++++++++------
bsd-user/main.c              |   2 +-
linux-user/main.c            |   2 +-
tcg/tcg.c                    |  60 +++++++++++++-------
qemu-options.hx              |  11 ++++
tcg/aarch64/tcg-target.c.inc |  48 +++++++++-------
tcg/arm/tcg-target.c.inc     |  33 ++++++-----
tcg/i386/tcg-target.c.inc    |  28 ++++-----
tcg/mips/tcg-target.c.inc    |  64 ++++++++++++---------
tcg/ppc/tcg-target.c.inc     |  57 ++++++++++++-------
tcg/riscv/tcg-target.c.inc   |  51 +++++++++--------
tcg/s390/tcg-target.c.inc    |  25 +++++----
tcg/sparc/tcg-target.c.inc   |  33 ++++++-----
tcg/tcg-ldst.c.inc           |   2 +-
tcg/tcg-pool.c.inc           |   9 +--
tcg/tci/tcg-target.c.inc     |   8 +--
32 files changed, 555 insertions(+), 206 deletions(-)

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[PATCH RESEND 0/4] Mirror map JIT memory for TCG

Posted by Joelle van Dyne 5 years ago

To aid in debugging TCG, we enable a "mirror map" feature that, when enabled,
will use memfd_create() to create two mappings of the same memory for RW and RX.
The feature is only built when targeting system emulation on Linux and
configured with --enable-debug-tcg. It can be disabled with the runtime argument
`-accel tcg,mirror-jit=off`.

Although this patch only enables this feature for Linux, the main goal of this
is to enable, through a future patch, iOS JIT on older devices which require
strict W^X separation.

Resending because of merge conflict to current master.

-j

Joelle van Dyne (4):
  tcg: add const hints for code pointers
  tcg: implement mirror mapped JIT for Linux
  tcg: use mirror map JIT in code generation
  tcg: make mirror mapped JIT optional

 configure                    |  13 +++++
 meson.build                  |   1 +
 include/exec/exec-all.h      |   8 +++
 include/sysemu/tcg.h         |   2 +-
 include/tcg/tcg.h            |  26 +++++++--
 tcg/aarch64/tcg-target.h     |  18 +++++-
 tcg/arm/tcg-target.h         |  15 ++++-
 tcg/i386/tcg-target.h        |  26 ++++++++-
 tcg/mips/tcg-target.h        |  12 +++-
 tcg/ppc/tcg-target.h         |  12 +++-
 tcg/riscv/tcg-target.h       |  13 ++++-
 tcg/s390/tcg-target.h        |  17 +++++-
 tcg/sparc/tcg-target.h       |  12 +++-
 tcg/tci/tcg-target.h         |   9 ++-
 accel/tcg/cpu-exec.c         |   7 ++-
 accel/tcg/tcg-all.c          |  31 +++++++++-
 accel/tcg/translate-all.c    | 106 +++++++++++++++++++++++++++++------
 bsd-user/main.c              |   2 +-
 linux-user/main.c            |   2 +-
 tcg/tcg.c                    |  60 +++++++++++++-------
 qemu-options.hx              |  11 ++++
 tcg/aarch64/tcg-target.c.inc |  48 +++++++++-------
 tcg/arm/tcg-target.c.inc     |  33 ++++++-----
 tcg/i386/tcg-target.c.inc    |  28 ++++-----
 tcg/mips/tcg-target.c.inc    |  64 ++++++++++++---------
 tcg/ppc/tcg-target.c.inc     |  57 ++++++++++++-------
 tcg/riscv/tcg-target.c.inc   |  51 +++++++++--------
 tcg/s390/tcg-target.c.inc    |  25 +++++----
 tcg/sparc/tcg-target.c.inc   |  33 ++++++-----
 tcg/tcg-ldst.c.inc           |   2 +-
 tcg/tcg-pool.c.inc           |   9 +--
 tcg/tci/tcg-target.c.inc     |   8 +--
 32 files changed, 555 insertions(+), 206 deletions(-)

-- 
2.28.0