v4 changes:
* Fix issue where load_all_modules was only loading the last already loaded
module.
* Drastically simply runtime_load_module by using hardware break instead
of software break. The previous work around didn't seem to be reliable on
QEMU either.
* Move early initialization symbol loading for i386-pc into its own patch
v3 changes:
* Rebase on to latest master
* Use correct automake macro for target cpu
There's been a lot of changes since v1. There are more fixes and more
features. The majority of the shell code has been moved to an external
file named gdb_helper.sh, instead of being inline in the GDB script. The
one (direct) PERL dependency in GRUB has been removed and converted to
shell script. Also a section on debugging is added to the developer docs.
Glenn
Glenn Washburn (15):
gdb: Fix redirection issue in dump_module_sections
gdb: Prevent wrapping when writing to .segments.tmp
gdb: If no modules have been loaded, do not try to load module symbols
gdb: Move runtime module loading into runtime_load_module
gdb: Reliably load modules in runtime_load_module
gdb: Add functions to make loading from dynamically positioned targets
easier
gdb: Remove Perl dependency for GRUB GDB script
gdb: If enabled, print line used to load EFI kernel symbols when using
gdb_grub script
gdb: Conditionally run GDB script logic for dynamically or statically
positioned GRUB
gdb: Only connect to remote target once when first sourced
gdb: Allow user defined "onload_<modname>" command to be run when
module is loaded
gdb: Allow running user-defined commands at GRUB start
gdb: Add extra early initialization symbols for i386-pc
gdb: Add ability to turn on shell tracing for gdb helper script
docs: Add debugging chapter to development documentation
config.h.in | 3 +
docs/grub-dev.texi | 191 ++++++++++++++++++++++++++++++++++++
grub-core/Makefile.core.def | 4 +-
grub-core/gdb_grub.in | 162 +++++++++++++++++++++++++-----
grub-core/gdb_helper.sh.in | 108 ++++++++++++++++++++
grub-core/gmodule.pl.in | 30 ------
grub-core/kern/efi/efi.c | 4 +-
grub-core/kern/efi/init.c | 19 +++-
include/grub/efi/efi.h | 2 +-
9 files changed, 465 insertions(+), 58 deletions(-)
create mode 100644 grub-core/gdb_helper.sh.in
delete mode 100644 grub-core/gmodule.pl.in
Range-diff against v3:
1: ec2b71c403 ! 1: 9f273b8fa5 gdb: Fix redirection issue in
dump_module_sections
@@ Commit message
which does the redirection and undoes the redirection when it finishes
regardless of any errors in the command.
+ Also, remove .segments.tmp file prior to loading modules in case one
was
+ left from a previous run.
+
## grub-core/gdb_grub.in ##
@@
###
@@ grub-core/gdb_grub.in: define dump_module_sections
- set logging off
- # FIXME: restore logging status
+define dump_module_sections
-+ pipe dump_module_sections_helper $arg0 | sh -c 'cat >.segments.tmp'
++ pipe dump_module_sections_helper $arg0 | sh -c 'cat >>.segments.tmp'
end
document dump_module_sections
Gather information about module whose mod structure was
+@@ grub-core/gdb_grub.in: document load_module
+ end
+
+ define load_all_modules
++ shell rm -f .segments.tmp
+ set $this = grub_dl_head
+ while ($this != 0)
+ dump_module_sections $this
2: f350ddf3c9 ! 2: 85f68a8369 gdb: Prevent wrapping when writing to
.segments.tmp
@@ grub-core/gdb_grub.in: define dump_module_sections_helper
+ # to .segments.tmp
+ with width 0 -- \
+ with trace-commands off -- \
- pipe dump_module_sections_helper $arg0 | sh -c 'cat >.segments.tmp'
+ pipe dump_module_sections_helper $arg0 | sh -c 'cat >>.segments.tmp'
end
document dump_module_sections
3: 75949e0d8e = 3: 88b3973cdb gdb: If no modules have been loaded, do not
try to load module symbols
4: ed5599b842 = 4: c0d7da87a8 gdb: Move runtime module loading into
runtime_load_module
5: e00aa463bb < -: ---------- gdb: Get correct mod variable value
6: c1e0439012 < -: ---------- gdb: Do not run load_module if module has
already been loaded
-: ---------- > 5: 4712465374 gdb: Reliably load modules in
runtime_load_module
7: dc8ce82e27 = 6: 283021b7b9 gdb: Add functions to make loading from
dynamically positioned targets easier
8: dc7338f00a = 7: 8f4b7c3bbd gdb: Remove Perl dependency for GRUB GDB
script
9: 0ee5cb7cc1 = 8: 055e968779 gdb: If enabled, print line used to load EFI
kernel symbols when using gdb_grub script
10: 7ec11bff7e = 9: 64eccfc37e gdb: Conditionally run GDB script logic for
dynamically or statically positioned GRUB
11: e62defbaa7 = 10: 5064458dfd gdb: Only connect to remote target once when
first sourced
12: 0101c41233 = 11: c33e8f57b4 gdb: Allow user defined "onload_<modname>"
command to be run when module is loaded
13: 94f4707b14 ! 12: f8a26f3a56 gdb: Allow running user-defined commands at
GRUB start
@@ grub-core/gdb_grub.in: end
# We may have been very late to loading the kernel.exec symbols and
# and modules may already be loaded. So load symbols for any already
# loaded.
-@@ grub-core/gdb_grub.in: document num_modules
- Given a module name print its address or NULL if not loaded.
+@@ grub-core/gdb_grub.in: document runtime_load_module
+ Load module symbols at runtime as they are loaded.
end
+define run_on_start
@@ grub-core/gdb_grub.in: document num_modules
###
set confirm off
-@@ grub-core/gdb_grub.in: set confirm off
- # fail.
-
- set $platform_efi = $_streq("@platform@", "efi")
-+set $target = "@target_cpu@-@platform@"
-
- if ! $runonce
- if $platform_efi
- # Only load the executable file, not the symbols
+@@ grub-core/gdb_grub.in: if ! $runonce
exec-file kernel.exec
else
-+ if $_streq($target, "i386-pc")
-+ add-symbol-file boot.image
-+ add-symbol-file diskboot.image
-+ add-symbol-file lzma_decompress.image
-+ end
file kernel.exec
+ run_on_start
runtime_load_module
-: ---------- > 13: fbd217a89c gdb: Add extra early initialization symbols
for i386-pc
14: 5fbef49d07 = 14: 973f24a485 gdb: Add ability to turn on shell tracing for
gdb helper script
15: b1f6f5861b = 15: d6c6947762 docs: Add debugging chapter to development
documentation
--
2.34.1
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