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27aeecf5d1
This patch adds a 'gdb' command to 'cli_monitor', which makes it possible
to debug an application with GDB.
The command works similarly to the 'start' command, but instead of
starting the subsystem binary directly, an 'init' subsystem gets
started, which then starts 'terminal_crosslink', 'noux', GDB and
'gdb_monitor' (which starts the application binary as its target).
So, for the 'gdb' command to work, these additional components need to
be available, too. 'terminal_crosslink', 'noux', 'gdb_monitor' and the
file 'gdb_command_config' are expected to be ROM modules. The Noux GDB
client needs to get mounted at '/bin' in Noux and the target binaries need
to be available as ROM modules (loaded by 'gdb_monitor') and also mounted
at '/gdb' in Noux (loaded by the GDB client).
Additionally, the source code of the target application can be provided
at '/gdb/src/ in Noux. How the Noux mountings get established can
be configured in the 'gdb_command_config' file. The default configuration
in 'os/src/server/cli_monitor/gdb_command_config' mounts GDB from a tar
archive named 'gdb.tar', the GDB target binaries from a tar archive named
'gdb_target.tar' and the target source code from a tar archive named
'gdb_target-src.tar'.
The patch includes an 'expect' include file (ports/run/noux_gdb.inc)
which provides functions that help to create those tar files:
- 'create_gdb_tar' creates a tar archive for the 'gdb' client
- 'create_binary_tar' creates a tar archive for the target application
- 'create_source_tar' creates a tar archive for the source code of
the target application
- 'create_binary_and_source_tars' is a convenience wrapper for the previous
two functions
The patch also includes an example run script
(ports/run/noux_gdb_dynamic.run).
The 'gdb' command supports the following command line options:
- --ram: the initial RAM quota provided to the whole subsystem
(including the GDB-related components)
- --ram-limit: limit for expanding RAM quota
- --gdb-ram-preserve: the RAM quota that 'gdb_monitor' ahould preserve
for itself
Fixes #928.
70 lines
2.0 KiB
PHP
70 lines
2.0 KiB
PHP
#
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# Utility functions for run scripts using Noux GDB
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#
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#
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# Return the name of the Noux GDB package for the configured platform
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#
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proc noux_gdb_pkg_name { } {
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if {[have_spec arm]} {
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return "gdb_arm"
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} elseif {[have_spec x86]} {
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return "gdb_x86"
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}
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}
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#
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# Create a tar archive for GDB (stripped)
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#
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proc create_gdb_tar { } {
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exec sh -c "find bin/[noux_gdb_pkg_name]/ -type f | (xargs [cross_dev_prefix]strip || true) 2>/dev/null"
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exec tar cfhv bin/gdb.tar -C bin/[noux_gdb_pkg_name] .
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}
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#
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# Create a tar archive for a Noux application and its shared libraries (unstripped)
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#
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proc create_binary_tar { application_name application_binaries } {
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foreach application_binary ${application_binaries} {
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exec tar ufv bin/${application_name}.tar -h -C bin ${application_binary}
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}
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}
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#
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# Create a tar archive for the source code of a Noux application and its shared
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# libraries.
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#
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# Currently, directories need to have their own tar records
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#
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proc create_source_tar { application_name application_binaries } {
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exec mkdir -p bin/${application_name}-src
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foreach application_binary $application_binaries {
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set source_files [ exec [cross_dev_prefix]objdump -dl bin/${application_binary} | grep "^/.*:.*" | sed -e "s/:.*//" | uniq ]
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foreach source_file ${source_files} {
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# resolve '..' to avoid problems with 'tar' with parts like '/a/b/../'
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# where '/a' exists, but '/a/b' does not
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set source_file [file normalize ${source_file}]
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if [file exists ${source_file}] {
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set dirname [ exec dirname ${source_file}]
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exec mkdir -p bin/${application_name}-src${dirname}
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exec ln -sf ${source_file} bin/${application_name}-src${source_file}
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}
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}
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}
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exec tar chf bin/${application_name}-src.tar -C bin/${application_name}-src .
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}
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#
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# Create tar archives for binaries and source code of a Noux application
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#
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proc create_binary_and_source_tars { application_name application_binaries } {
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create_binary_tar ${application_name} ${application_binaries}
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create_source_tar ${application_name} ${application_binaries}
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}
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