From: "Jose E. Marchesi" <jose.marchesi@oracle.com>
To: "Jose E. Marchesi via Gdb-patches" <gdb-patches@sourceware.org>
Subject: Re: [PATCH V5 0/3] eBPF support
Date: Mon, 20 Jul 2020 21:17:16 +0200 [thread overview]
Message-ID: <87k0yyro77.fsf@oracle.com> (raw)
In-Reply-To: <20200713122458.21339-1-jose.marchesi@oracle.com> (Jose E. Marchesi via Gdb-patches's message of "Mon, 13 Jul 2020 14:24:55 +0200")
ping
[Changes from V4:
- Rebased to today's master.
- Remove bpf-tdep.h.
- Clarify in bpf_frame_this_id why this_id is not set.
- Make the GDB patch independent from the sim patch.
- Indentation/style fixes.
- Copyright year fixed in sim/bpf/Makefile.in
- CGEN_MAIN -> CGEN_MAINT typo fixed in sim/bpf/Makefile.in
- Removed XXX comments from sim/bpf/Makefile.in
- Removed spurious comment from sim/bpf/sim-if.c]
Hi good peoples!
This patch series adds support for the eBPF virtual architecture to
GDB [1].
The first patch contains the basic bits to GDB in order to support the
bpf-unknown-none target. Breakpointing and instruction
single-stepping works, but the debugging support in eBPF is still very
minimal. This is mainly due to the many limitations imposed by the
architecture (disjoint stack, maximum stack size, etc). We are
working to overcome these limitations, by introducing a variant called
xbpf, already supported in GCC with the -mxbpf option, whose purpose
is to ease debugging and to be used in other contexts different than
the Linux kernel, less restrictive.
The second patch adds a basic CGEN-based instruction simulator for
eBPF. It can run many eBPF programs and works well with GDB. A
testsuite covering the supported instructions is also included. We
will be expanding it in order to emulate the several kernel contexts
in which eBPF programs can run, so eBPF developers can use GDB to
debug their programs without having to load them in a running kernel.
Currently the only kernel helper implemented in the simulator is
printk, which is used by the tests.
We of course commit to maintain and evolve this stuff :)
[1] Support for eBPF has been already added to both binutils and GCC.
Jose E. Marchesi (3):
gdb: support for eBPF
sim: eBPF simulator
sim: generated files for the eBPF simulator
gdb/ChangeLog | 12 +
gdb/Makefile.in | 2 +
gdb/bpf-tdep.c | 373 +
gdb/configure.tgt | 6 +
gdb/doc/ChangeLog | 6 +
gdb/doc/gdb.texinfo | 21 +
sim/ChangeLog | 42 +
sim/MAINTAINERS | 1 +
sim/bpf/Makefile.in | 203 +
sim/bpf/aclocal.m4 | 119 +
sim/bpf/arch.c | 35 +
sim/bpf/arch.h | 50 +
sim/bpf/bpf-helpers.c | 175 +
sim/bpf/bpf-helpers.def | 194 +
sim/bpf/bpf-helpers.h | 31 +
sim/bpf/bpf-sim.h | 31 +
sim/bpf/bpf.c | 327 +
sim/bpf/config.in | 248 +
sim/bpf/configure | 15942 ++++++++++++++++++++++++++
sim/bpf/configure.ac | 13 +
sim/bpf/cpu.c | 69 +
sim/bpf/cpu.h | 81 +
sim/bpf/cpuall.h | 65 +
sim/bpf/decode-be.c | 1129 ++
sim/bpf/decode-be.h | 94 +
sim/bpf/decode-le.c | 1129 ++
sim/bpf/decode-le.h | 94 +
sim/bpf/decode.h | 37 +
sim/bpf/defs-be.h | 383 +
sim/bpf/defs-le.h | 383 +
sim/bpf/eng.h | 24 +
sim/bpf/mloop.in | 165 +
sim/bpf/sem-be.c | 3207 ++++++
sim/bpf/sem-le.c | 3207 ++++++
sim/bpf/sim-if.c | 214 +
sim/bpf/sim-main.h | 51 +
sim/bpf/traps.c | 33 +
sim/configure | 8 +
sim/configure.tgt | 3 +
sim/testsuite/ChangeLog | 17 +
sim/testsuite/configure | 9 +-
sim/testsuite/sim/bpf/allinsn.exp | 26 +
sim/testsuite/sim/bpf/alu.s | 109 +
sim/testsuite/sim/bpf/alu32.s | 99 +
sim/testsuite/sim/bpf/endbe.s | 46 +
sim/testsuite/sim/bpf/endle.s | 43 +
sim/testsuite/sim/bpf/jmp.s | 120 +
sim/testsuite/sim/bpf/jmp32.s | 120 +
sim/testsuite/sim/bpf/ldabs.s | 87 +
sim/testsuite/sim/bpf/mem.s | 56 +
sim/testsuite/sim/bpf/mov.s | 54 +
sim/testsuite/sim/bpf/testutils.inc | 38 +
sim/testsuite/sim/bpf/xadd.s | 44 +
53 files changed, 29072 insertions(+), 3 deletions(-)
create mode 100644 gdb/bpf-tdep.c
create mode 100644 sim/bpf/Makefile.in
create mode 100644 sim/bpf/aclocal.m4
create mode 100644 sim/bpf/arch.c
create mode 100644 sim/bpf/arch.h
create mode 100644 sim/bpf/bpf-helpers.c
create mode 100644 sim/bpf/bpf-helpers.def
create mode 100644 sim/bpf/bpf-helpers.h
create mode 100644 sim/bpf/bpf-sim.h
create mode 100644 sim/bpf/bpf.c
create mode 100644 sim/bpf/config.in
create mode 100755 sim/bpf/configure
create mode 100644 sim/bpf/configure.ac
create mode 100644 sim/bpf/cpu.c
create mode 100644 sim/bpf/cpu.h
create mode 100644 sim/bpf/cpuall.h
create mode 100644 sim/bpf/decode-be.c
create mode 100644 sim/bpf/decode-be.h
create mode 100644 sim/bpf/decode-le.c
create mode 100644 sim/bpf/decode-le.h
create mode 100644 sim/bpf/decode.h
create mode 100644 sim/bpf/defs-be.h
create mode 100644 sim/bpf/defs-le.h
create mode 100644 sim/bpf/eng.h
create mode 100644 sim/bpf/mloop.in
create mode 100644 sim/bpf/sem-be.c
create mode 100644 sim/bpf/sem-le.c
create mode 100644 sim/bpf/sim-if.c
create mode 100644 sim/bpf/sim-main.h
create mode 100644 sim/bpf/traps.c
create mode 100644 sim/testsuite/sim/bpf/allinsn.exp
create mode 100644 sim/testsuite/sim/bpf/alu.s
create mode 100644 sim/testsuite/sim/bpf/alu32.s
create mode 100644 sim/testsuite/sim/bpf/endbe.s
create mode 100644 sim/testsuite/sim/bpf/endle.s
create mode 100644 sim/testsuite/sim/bpf/jmp.s
create mode 100644 sim/testsuite/sim/bpf/jmp32.s
create mode 100644 sim/testsuite/sim/bpf/ldabs.s
create mode 100644 sim/testsuite/sim/bpf/mem.s
create mode 100644 sim/testsuite/sim/bpf/mov.s
create mode 100644 sim/testsuite/sim/bpf/testutils.inc
create mode 100644 sim/testsuite/sim/bpf/xadd.s
next prev parent reply other threads:[~2020-07-20 19:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-13 12:24 Jose E. Marchesi
2020-07-13 12:24 ` [PATCH V5 1/3] gdb: support for eBPF Jose E. Marchesi
2020-07-13 13:04 ` Eli Zaretskii
2020-07-13 13:30 ` Jose E. Marchesi
2020-08-01 23:25 ` Simon Marchi
2020-08-01 23:32 ` Simon Marchi
2020-07-13 12:24 ` [PATCH V5 2/3] sim: eBPF simulator Jose E. Marchesi
2020-07-13 12:24 ` [PATCH V5 3/3] sim: generated files for the " Jose E. Marchesi
2020-07-20 19:17 ` Jose E. Marchesi [this message]
2020-08-01 23:16 ` [PATCH V5 0/3] eBPF support Simon Marchi
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