From: Joelle van Dyne <j@getutm.app>
To: qemu-devel@nongnu.org
Subject: [PATCH 0/4] Mirror map JIT memory for TCG
Date: Mon, 26 Oct 2020 10:25:31 -0700 [thread overview]
Message-ID: <20201026172535.10419-1-j@getutm.app> (raw)
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.
-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
next reply other threads:[~2020-10-26 17:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-26 17:25 Joelle van Dyne [this message]
2020-10-26 17:25 ` [PATCH 1/4] tcg: add const hints for code pointers Joelle van Dyne
2020-10-26 17:25 ` [PATCH 2/4] tcg: implement mirror mapped JIT for Linux Joelle van Dyne
2020-10-26 17:25 ` [PATCH 3/4] tcg: use mirror map JIT in code generation Joelle van Dyne
2020-10-26 17:25 ` [PATCH 4/4] tcg: make mirror mapped JIT optional Joelle van Dyne
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