3rd-party/linux-kernel-module-cheat
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run: --trace-insts-stdout

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Ciro Santilli 六四事件 法轮功
2019-02-20 00:00:00 +00:00
parent e855a262fd
commit 2b93b18646
2 changed files with 29 additions and 4 deletions
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17
README.adoc
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@@ -3110,7 +3110,7 @@ where `build` builds the whole toolchain for us.
`./run --userland` path resolution is analogous to <<baremetal-setup-getting-started,that of `./run --baremetal`>>. `./run --userland` path resolution is analogous to <<baremetal-setup-getting-started,that of `./run --baremetal`>>.
`./build user-mode-qemu` first builds Buildroot, and then runs `./build-userland`, which is further documented at: <<userland-directory>>. `./build user-mode-qemu` first builds Buildroot, and then runs `./build-userland`, which is further documented at: <<userland-directory>>. It also builds QEMU.
==== User mode simulation with glibc ==== User mode simulation with glibc
@@ -9057,12 +9057,23 @@ Output the trace to stdout instead of a file:
--arch aarch64 \ --arch aarch64 \
--emulator gem5 \ --emulator gem5 \
--eval 'm5 exit' \ --eval 'm5 exit' \
--trace Exec \ --trace ExecAll \
--trace-stdout \ --trace-stdout \
; ;
.... ....
This would produce a lot of output however, so you will likely not want that when tracing a Linux kernel boot instructions. But it can be very convenient for smaller traces. We also have a shortcut for `--trace ExecAll -trace-stdout` with `--trace-insts-stdout`
....
./run \
--arch aarch64 \
--emulator gem5 \
--eval 'm5 exit' \
--trace-insts-stdout \
;
....
This would produce a lot of output however, so you will likely not want that when tracing a Linux kernel boot instructions. But it can be very convenient for smaller traces such as <<baremetal>>.
List all available debug flags: List all available debug flags:

16
run
View File

@@ -160,9 +160,17 @@ rare and don't affect performance, because `./configure
''' '''
) )
self.add_argument( self.add_argument(
'--trace-stdout', default=False, '--trace-stdout',
default=False,
help='''\ help='''\
Output trace to stdout instead of a file. Only works for gem5 currently. Output trace to stdout instead of a file. Only works for gem5 currently.
'''
)
self.add_argument(
'--trace-insts-stdout',
default=False,
help='''\
Trace instructions run to stdout. Shortcut for --trace --trace-stdout.
''' '''
) )
self.add_argument( self.add_argument(
@@ -274,6 +282,12 @@ Run QEMU with VNC instead of the default SDL. Connect to it with:
if kernel_cli_after_dash: if kernel_cli_after_dash:
kernel_cli += " -{}".format(kernel_cli_after_dash) kernel_cli += " -{}".format(kernel_cli_after_dash)
extra_env = {} extra_env = {}
if self.env['trace_insts_stdout']:
if self.env['emulator'] == 'qemu':
extra_emulator_args.extend(['-d', 'in_asm', LF])
elif self.env['emulator'] == 'gem5':
self.env['trace_stdout'] = True
self.env['trace'] = 'ExecAll'
if self.env['trace'] is None: if self.env['trace'] is None:
do_trace = False do_trace = False
# A dummy value that is already turned on by default and does not produce large output, # A dummy value that is already turned on by default and does not produce large output,