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authorKoudai Iwahori <koudai@google.com>2023-08-01 15:10:52 +0300
committerAndrew Morton <akpm@linux-foundation.org>2023-08-18 20:18:58 +0300
commit1677bf76818beeafd4aa524ad1d031d4c760e919 (patch)
treeec0861c8ffb42d8d51dd76d72cc5132df183ce19 /scripts/gdb
parent29665c1e2ae56fe60dcea1135882af7d6e222ddd (diff)
downloadlinux-1677bf76818beeafd4aa524ad1d031d4c760e919.tar.xz
scripts/gdb: fix lx-symbols command for arm64 LLVM
lx-symbols assumes that module's .text sections is located at `module->mem[MOD_TEXT].base` and passes it to add-symbol-file command. However, .text section follows after .plt section in modules built by LLVM toolchain for arm64 target. Symbol addresses are skewed in GDB. Fix this issue by using the address of .text section stored in `module->sect_attrs`. Link: https://lkml.kernel.org/r/20230801121052.2475183-1-koudai@google.com Signed-off-by: Koudai Iwahori <koudai@google.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'scripts/gdb')
-rw-r--r--scripts/gdb/linux/symbols.py17
1 files changed, 10 insertions, 7 deletions
diff --git a/scripts/gdb/linux/symbols.py b/scripts/gdb/linux/symbols.py
index fdad3f32c747..c8047f4441e6 100644
--- a/scripts/gdb/linux/symbols.py
+++ b/scripts/gdb/linux/symbols.py
@@ -89,23 +89,27 @@ lx-symbols command."""
return name
return None
- def _section_arguments(self, module):
+ def _section_arguments(self, module, module_addr):
try:
sect_attrs = module['sect_attrs'].dereference()
except gdb.error:
- return ""
+ return str(module_addr)
+
attrs = sect_attrs['attrs']
section_name_to_address = {
attrs[n]['battr']['attr']['name'].string(): attrs[n]['address']
for n in range(int(sect_attrs['nsections']))}
+
+ textaddr = section_name_to_address.get(".text", module_addr)
args = []
for section_name in [".data", ".data..read_mostly", ".rodata", ".bss",
- ".text", ".text.hot", ".text.unlikely"]:
+ ".text.hot", ".text.unlikely"]:
address = section_name_to_address.get(section_name)
if address:
args.append(" -s {name} {addr}".format(
name=section_name, addr=str(address)))
- return "".join(args)
+ return "{textaddr} {sections}".format(
+ textaddr=textaddr, sections="".join(args))
def load_module_symbols(self, module):
module_name = module['name'].string()
@@ -125,10 +129,9 @@ lx-symbols command."""
module_addr = hex(int(module_addr, 0) + plt_offset + plt_size)
gdb.write("loading @{addr}: {filename}\n".format(
addr=module_addr, filename=module_file))
- cmdline = "add-symbol-file {filename} {addr}{sections}".format(
+ cmdline = "add-symbol-file {filename} {sections}".format(
filename=module_file,
- addr=module_addr,
- sections=self._section_arguments(module))
+ sections=self._section_arguments(module, module_addr))
gdb.execute(cmdline, to_string=True)
if module_name not in self.loaded_modules:
self.loaded_modules.append(module_name)