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The BPF port in binutils has been rewritten (commit
d218e7fedc74d67837d2134120917f4ac877454c) in order to not be longer
based on CGEN. Please see that commit log for more information.
This patch updates the BPF simulator accordingly. The new
implementation is much simpler and it is based on the new BPF opcodes.
Tested with target bpf-unknown-none with both 64-bit little-endian
host and 32-bit little-endian host.
Note that I have not tested in a big-endian host yet. I will do so
once this lands upstream so I can use the GCC compiler farm.
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This commit is the result of running the gdb/copyright.py script,
which automated the update of the copyright year range for all
source files managed by the GDB project to be updated to include
year 2023.
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This commit brings all the changes made by running gdb/copyright.py
as per GDB's Start of New Year Procedure.
For the avoidance of doubt, all changes in this commits were
performed by the script.
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Various files were not including the relevant headers, or some funcs
were missing prototypes entirely, leading to mismatch between the
actual definition of the functions. Add includes to a few places and
fix the broken functions that are uncovered as a result. Fixing some
compile warnings (e.g. missing prototypes) often find real bugs.
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This commits the result of running gdb/copyright.py as per our Start
of New Year procedure...
gdb/ChangeLog
Update copyright year range in copyright header of all GDB files.
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This patch fixes the following problems:
- Missing includes in several files leading to implicit function
declarations.
- Missing prototype for bpf_trace_printk in bpf-helpers.h
- The simulator bitsize was set to 32 bits, causing truncation of
the program counter.
Tested in bpf-unknown-none.
sim/ChangeLog:
2020-09-03 Jose E. Marchesi <jose.marchesi@oracle.com>
* bpf/bpf.c: Include bpf-helpers.h.
* bpf/bpf-helpers.h: Provide a prototype for bpf_trace_printk.
* bpf/configure.ac: Set simulator bitsize to 64.
* bpf/configure (includedir): Regenerate.
* bpf/sim-if.c: Include stdlib.h.
* bpf/traps.c: Likewise.
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This patch introduces the basics of an instruction-simulator for eBPF.
The simulator is based on CGEN.
gdb/ChangeLog:
2020-08-04 Jose E. Marchesi <jose.marchesi@oracle.com>
* configure.tgt: Set gdb_sim for bpf-*-* targets.
sim/ChangeLog:
2020-08-04 Jose E. Marchesi <jose.marchesi@oracle.com>
David Faust <david.faust@oracle.com>
* configure.tgt (sim_arch): Add entry for bpf-*-*.
* configure: Regenerate.
* MAINTAINERS: Add maintainer for the BPF simulator.
* bpf/Makefile.in: New file.
* bpf/bpf-helpers.c: Likewise.
* bpf/bpf-helpers.def: Likewise.
* bpf/bpf-helpers.h: Likewise.
* bpf/bpf-sim.h: Likewise.
* bpf/bpf.c: Likewise.
* bpf/config.in: Likewise.
* bpf/configure.ac: Likewise.
* bpf/decode.h: Likewise.
* bpf/eng.h: Likewise.
* bpf/mloop.in: Likewise.
* bpf/sim-if.c: Likewise.
* bpf/sim-main.h: Likewise.
* bpf/traps.c: Likewise.
* bpf/configure: Generate.
* bpf/aclocal.m4: Likewise.
sim/testsuite/ChangeLog:
2020-08-04 David Faust <david.faust@oracle.com>
Jose E. Marchesi <jose.marchesi@oracle.com>
* configure: Regenerate.
* sim/bpf/allinsn.exp: New file.
* sim/bpf/alu.s: Likewise.
* sim/bpf/alu32.s: Likewise.
* sim/bpf/endbe.s: Likewise.
* sim/bpf/endle.s: Likewise.
* sim/bpf/jmp.s: Likewise.
* sim/bpf/jmp32.s: Likewise.
* sim/bpf/ldabs.s: Likewise.
* sim/bpf/mem.s: Likewise.
* sim/bpf/mov.s: Likewise.
* sim/bpf/testutils.inc: Likewise.
* sim/bpf/xadd.s: Likewise.
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