Merge tag 'objtool-core-2023-04-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull objtool updates from Ingo Molnar:

 - Mark arch_cpu_idle_dead() __noreturn, make all architectures &
   drivers that did this inconsistently follow this new, common
   convention, and fix all the fallout that objtool can now detect
   statically

 - Fix/improve the ORC unwinder becoming unreliable due to
   UNWIND_HINT_EMPTY ambiguity, split it into UNWIND_HINT_END_OF_STACK
   and UNWIND_HINT_UNDEFINED to resolve it

 - Fix noinstr violations in the KCSAN code and the lkdtm/stackleak code

 - Generate ORC data for __pfx code

 - Add more __noreturn annotations to various kernel startup/shutdown
   and panic functions

 - Misc improvements & fixes

* tag 'objtool-core-2023-04-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (52 commits)
  x86/hyperv: Mark hv_ghcb_terminate() as noreturn
  scsi: message: fusion: Mark mpt_halt_firmware() __noreturn
  x86/cpu: Mark {hlt,resume}_play_dead() __noreturn
  btrfs: Mark btrfs_assertfail() __noreturn
  objtool: Include weak functions in global_noreturns check
  cpu: Mark nmi_panic_self_stop() __noreturn
  cpu: Mark panic_smp_self_stop() __noreturn
  arm64/cpu: Mark cpu_park_loop() and friends __noreturn
  x86/head: Mark *_start_kernel() __noreturn
  init: Mark start_kernel() __noreturn
  init: Mark [arch_call_]rest_init() __noreturn
  objtool: Generate ORC data for __pfx code
  x86/linkage: Fix padding for typed functions
  objtool: Separate prefix code from stack validation code
  objtool: Remove superfluous dead_end_function() check
  objtool: Add symbol iteration helpers
  objtool: Add WARN_INSN()
  scripts/objdump-func: Support multiple functions
  context_tracking: Fix KCSAN noinstr violation
  objtool: Add stackleak instrumentation to uaccess safe list
  ...

2 files changed, 26 insertions, 10 deletions

diff --git a/scripts/objdump-func b/scripts/objdump-func
index 4eb463dd9f52..7b15b873d0e2 100755
--- a/scripts/objdump-func
+++ b/scripts/objdump-func
@@ -3,7 +3,7 @@
 #
 # Disassemble a single function.
 #
-# usage: objdump-func <file> <func>
+# usage: objdump-func <file> <func> [<func> ...]
 
 set -o errexit
 set -o nounset
@@ -13,17 +13,33 @@ OBJDUMP="${CROSS_COMPILE:-}objdump"
 command -v gawk >/dev/null 2>&1 || die "gawk isn't installed"
 
 usage() {
-	echo "usage: objdump-func <file> <func>" >&2
+	echo "usage: objdump-func <file> <func> [<func> ...]" >&2
 	exit 1
 }
 
 [[ $# -lt 2 ]] && usage
 
 OBJ=$1; shift
-FUNC=$1; shift
-
-# Secret feature to allow adding extra objdump args at the end
-EXTRA_ARGS=$@
-
-# Note this also matches compiler-added suffixes like ".cold", etc
-${OBJDUMP} -wdr $EXTRA_ARGS $OBJ | gawk -M -v f=$FUNC '/^$/ { P=0; } $0 ~ "<" f "(\\..*)?>:" { P=1; O=strtonum("0x" $1); } { if (P) { o=strtonum("0x" $1); printf("%04x ", o-O); print $0; } }'
+FUNCS=("$@")
+
+${OBJDUMP} -wdr $OBJ | gawk -M -v _funcs="${FUNCS[*]}" '
+	BEGIN { split(_funcs, funcs); }
+	/^$/ { func_match=0; }
+	/<.*>:/ {
+		f = gensub(/.*<(.*)>:/, "\\1", 1);
+		for (i in funcs) {
+			# match compiler-added suffixes like ".cold", etc
+			if (f ~ "^" funcs[i] "(\\..*)?") {
+				func_match = 1;
+				base = strtonum("0x" $1);
+				break;
+			}
+		}
+	}
+	{
+		if (func_match) {
+			addr = strtonum("0x" $1);
+			printf("%04x ", addr - base);
+			print;
+		}
+	}'
diff --git a/scripts/sorttable.h b/scripts/sorttable.h
index deb7c1d3e979..7bd0184380d3 100644
--- a/scripts/sorttable.h
+++ b/scripts/sorttable.h
@@ -128,7 +128,7 @@ static int orc_sort_cmp(const void *_a, const void *_b)
 	 * whitelisted .o files which didn't get objtool generation.
 	 */
 	orc_a = g_orc_table + (a - g_orc_ip_table);
-	return orc_a->sp_reg == ORC_REG_UNDEFINED && !orc_a->end ? -1 : 1;
+	return orc_a->type == ORC_TYPE_UNDEFINED ? -1 : 1;
 }
 
 static void *sort_orctable(void *arg)