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authorSiddhesh Poyarekar <siddhesh@sourceware.org>2017-02-08 11:18:23 +0530
committerSiddhesh Poyarekar <siddhesh@sourceware.org>2017-02-08 14:17:17 +0530
commit8cbc826c37c0221ada65a7a622fe079b4e89a4b0 (patch)
tree598314eb1d2c9bb8da92f7c7f4cc25caf2cc31b4 /elf
parent3f67d1a7021ed3184830511636a0867faec730fe (diff)
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Fix getting tunable values on big-endian (BZ #21109)
The code to set value passed a tunable_val_t, which when cast to int32_t on big-endian gives the wrong value. Instead, use tunable_val_t.numval instead, which can then be safely cast into int32_t.
Diffstat (limited to 'elf')
-rw-r--r--elf/dl-tunable-types.h4
-rw-r--r--elf/dl-tunables.c2
2 files changed, 4 insertions, 2 deletions
diff --git a/elf/dl-tunable-types.h b/elf/dl-tunable-types.h
index a986f0b593..37a4e8021f 100644
--- a/elf/dl-tunable-types.h
+++ b/elf/dl-tunable-types.h
@@ -21,8 +21,6 @@
# define _TUNABLE_TYPES_H_
#include <stddef.h>
-typedef void (*tunable_callback_t) (void *);
-
typedef enum
{
TUNABLE_TYPE_INT_32,
@@ -43,6 +41,8 @@ typedef union
const char *strval;
} tunable_val_t;
+typedef void (*tunable_callback_t) (tunable_val_t *);
+
/* Security level for tunables. This decides what to do with individual
tunables for AT_SECURE binaries. */
typedef enum
diff --git a/elf/dl-tunables.c b/elf/dl-tunables.c
index a8d53d6a31..e42aa67003 100644
--- a/elf/dl-tunables.c
+++ b/elf/dl-tunables.c
@@ -455,6 +455,8 @@ __tunable_set_val (tunable_id_t id, void *valp, tunable_callback_t callback)
if (cur->strval == NULL)
return;
+ /* Caller does not need the value, just call the callback with our tunable
+ value. */
if (valp == NULL)
goto cb;