blob: 35d28a663db6754b5e5e1662b05929fbdad95ba8 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
From: Kevin F. Quinn <kevquinn@gentoo.org>
Taken from gentoo, original description:
This trivial patch causes gcc to emit a warning whenever it generates a
trampoline. These are otherwise hard to locate. It is rigged to default
ON - to have it default to OFF remove the text 'Init(1)' from the
common.opt patch, leaving just 'Common Var(warn_trampolines)'.
Signed-off-by: Robert Schwebel <r.schwebel@pengutronix.de>
---
gcc/builtins.c | 3 +++
gcc/common.opt | 4 ++++
2 files changed, 7 insertions(+)
Index: gcc-4.5.1/gcc/common.opt
===================================================================
--- gcc-4.5.1.orig/gcc/common.opt
+++ gcc-4.5.1/gcc/common.opt
@@ -196,6 +196,10 @@ Wtype-limits
Common Var(warn_type_limits) Init(-1) Warning
Warn if a comparison is always true or always false due to the limited range of the data type
+Wtrampolines
+Common Var(warn_trampolines) Init(1)
+Warn whenever a trampoline is generated
+
Wuninitialized
Common Var(warn_uninitialized) Init(-1) Warning
Warn about uninitialized automatic variables
Index: gcc-4.5.1/gcc/builtins.c
===================================================================
--- gcc-4.5.1.orig/gcc/builtins.c
+++ gcc-4.5.1/gcc/builtins.c
@@ -5029,6 +5029,9 @@ expand_builtin_profile_func (bool exitp)
0),
Pmode);
+ if (warn_trampolines)
+ warning (OPT_Wtrampolines, "generating trampoline in object (requires executable stack)");
+
return const0_rtx;
}
|
