docs: Clarify -fsanitize=hwaddress target support [PR117960]

Since GCC 13 -fsanitize=hwaddress is not supported just on AArch64, but also
on x86_64 (but only with -mlam=u48 or -mlam=u57).

2024-12-09  Jakub Jelinek  <jakub@redhat.com>

	PR sanitizer/117960
	* doc/invoke.texi (fsanitize=hwaddress): Clarify on which targets
	it is supported.

(cherry picked from commit 2e958291ff68d9bff1092895a14b6763de56823b)

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index b14ad30cdf2fbc4f8f94da338979223fdac172b2..b575e2b96632bc5902daa175e5309dd1f05db533 100644 (file)
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -17471,8 +17471,10 @@ the available options are shown at startup of the instrumented program.  See
 @url{https://github.com/google/sanitizers/wiki/AddressSanitizerFlags#run-time-flags}
 for a list of supported options.
 The option cannot be combined with @option{-fsanitize=thread} or
-@option{-fsanitize=hwaddress}.  Note that the only target
-@option{-fsanitize=hwaddress} is currently supported on is AArch64.
+@option{-fsanitize=hwaddress}.  Note that the only targets
+@option{-fsanitize=hwaddress} is currently supported on are x86-64
+(only with @code{-mlam=u48} or @code{-mlam=u57} options) and AArch64,
+in both cases only in ABIs with 64-bit pointers.
 
 To get more accurate stack traces, it is possible to use options such as
 @option{-O0}, @option{-O1}, or @option{-Og} (which, for instance, prevent