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| author | Luis Machado <luis.machado@linaro.org> | 2020-06-15 14:24:53 -0300 |
|---|---|---|
| committer | Luis Machado <luis.machado@linaro.org> | 2021-03-24 14:54:50 -0300 |
| commit | 1e735120b95236b1f0fd8c383e64b02b64909d7c (patch) | |
| tree | 9db3580d29028767a59b98cb49c7d2cb142e704d /gdb/ChangeLog | |
| parent | 93e447c605e549f183681ed60e729d3d50f4d113 (diff) | |
| download | fsf-binutils-gdb-1e735120b95236b1f0fd8c383e64b02b64909d7c.zip fsf-binutils-gdb-1e735120b95236b1f0fd8c383e64b02b64909d7c.tar.gz fsf-binutils-gdb-1e735120b95236b1f0fd8c383e64b02b64909d7c.tar.bz2 | |
Refactor parsing of /proc/<pid>/smaps
The Linux kernel exposes the information about MTE-protected pages via the
proc filesystem, more specifically through the smaps file.
What we're looking for is a mapping with the 'mt' flag, which tells us that
mapping was created with a PROT_MTE flag and, thus, is capable of using memory
tagging.
We already parse that file for other purposes (core file
generation/filtering), so this patch refactors the code to make the parsing
of the smaps file reusable for memory tagging.
The function linux_address_in_memtag_page uses the refactored code to allow
querying for memory tag support in a particular address, and it gets used in the
next patch.
gdb/ChangeLog:
2021-03-24 Luis Machado <luis.machado@linaro.org>
* linux-tdep.c (struct smaps_vmflags) <memory_tagging>: New flag
bit.
(struct smaps_data): New struct.
(decode_vmflags): Handle the 'mt' flag.
(parse_smaps_data): New function, refactored from
linux_find_memory_regions_full.
(linux_address_in_memtag_page): New function.
(linux_find_memory_regions_full): Refactor into parse_smaps_data.
* linux-tdep.h (linux_address_in_memtag_page): New prototype.
Diffstat (limited to 'gdb/ChangeLog')
| -rw-r--r-- | gdb/ChangeLog | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index da4bb26..9d155b8 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,17 @@ 2021-03-24 Luis Machado <luis.machado@linaro.org> + * linux-tdep.c (struct smaps_vmflags) <memory_tagging>: New flag + bit. + (struct smaps_data): New struct. + (decode_vmflags): Handle the 'mt' flag. + (parse_smaps_data): New function, refactored from + linux_find_memory_regions_full. + (linux_address_in_memtag_page): New function. + (linux_find_memory_regions_full): Refactor into parse_smaps_data. + * linux-tdep.h (linux_address_in_memtag_page): New prototype. + +2021-03-24 Luis Machado <luis.machado@linaro.org> + * linux-tdep.c (linux_find_memory_regions_full): Use std::string instead of char arrays. |