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authorKent Overstreet <kent.overstreet@linux.dev>2024-03-21 17:36:26 +0100
committerAndrew Morton <akpm@linux-foundation.org>2024-04-26 05:55:50 +0200
commita7f13d0f4b02fcc5ab2be5a31efd7ce8add9d10a (patch)
tree5237ae540dda4a7482889b37ba4942295ceb37a9 /scripts/kallsyms.c
parentmm/slub: mark slab_free_freelist_hook() __always_inline (diff)
downloadlinux-a7f13d0f4b02fcc5ab2be5a31efd7ce8add9d10a.tar.xz
linux-a7f13d0f4b02fcc5ab2be5a31efd7ce8add9d10a.zip
scripts/kallysms: always include __start and __stop symbols
These symbols are used to denote section boundaries: by always including them we can unify loading sections from modules with loading built-in sections, which leads to some significant cleanup. Link: https://lkml.kernel.org/r/20240321163705.3067592-5-surenb@google.com Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com> Tested-by: Kees Cook <keescook@chromium.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Alex Gaynor <alex.gaynor@gmail.com> Cc: Alice Ryhl <aliceryhl@google.com> Cc: Andreas Hindborg <a.hindborg@samsung.com> Cc: Benno Lossin <benno.lossin@proton.me> Cc: "Björn Roy Baron" <bjorn3_gh@protonmail.com> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Christoph Lameter <cl@linux.com> Cc: Dennis Zhou <dennis@kernel.org> Cc: Gary Guo <gary@garyguo.net> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tejun Heo <tj@kernel.org> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Wedson Almeida Filho <wedsonaf@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'scripts/kallsyms.c')
-rw-r--r--scripts/kallsyms.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index 653b92f6d4c8..47978efe4797 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -204,6 +204,11 @@ static int symbol_in_range(const struct sym_entry *s,
return 0;
}
+static bool string_starts_with(const char *s, const char *prefix)
+{
+ return strncmp(s, prefix, strlen(prefix)) == 0;
+}
+
static int symbol_valid(const struct sym_entry *s)
{
const char *name = sym_name(s);
@@ -211,6 +216,14 @@ static int symbol_valid(const struct sym_entry *s)
/* if --all-symbols is not specified, then symbols outside the text
* and inittext sections are discarded */
if (!all_symbols) {
+ /*
+ * Symbols starting with __start and __stop are used to denote
+ * section boundaries, and should always be included:
+ */
+ if (string_starts_with(name, "__start_") ||
+ string_starts_with(name, "__stop_"))
+ return 1;
+
if (symbol_in_range(s, text_ranges,
ARRAY_SIZE(text_ranges)) == 0)
return 0;