1 From 4a96b948687166da26a6c327e6c6733ad2336c5c Mon Sep 17 00:00:00 2001
2 From: Denys Vlasenko <vda.linux@googlemail.com>
3 Date: Thu, 18 Jul 2013 21:57:06 +0200
4 Subject: [PATCH-0.9.33] bits/waitstatus.h: correctly interpret status 0x007f on
7 On other architectures exit status of 0x007f is not possible,
8 they don't have signal 127.
10 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
12 libc/sysdeps/linux/common/bits/waitstatus.h | 16 ++++++++++++----
13 1 file changed, 12 insertions(+), 4 deletions(-)
15 diff --git a/libc/sysdeps/linux/common/bits/waitstatus.h b/libc/sysdeps/linux/common/bits/waitstatus.h
16 index 45d0fd3..33f39a8 100644
17 --- a/libc/sysdeps/linux/common/bits/waitstatus.h
18 +++ b/libc/sysdeps/linux/common/bits/waitstatus.h
20 /* Everything extant so far uses these same bits. */
23 -/* If WIFEXITED(STATUS), the low-order 8 bits of the status. */
24 +/* If WIFEXITED(STATUS), the low-order 8 bits of exit(N). */
25 #define __WEXITSTATUS(status) (((status) & 0xff00) >> 8)
27 /* If WIFSIGNALED(STATUS), the terminating signal. */
29 /* Nonzero if STATUS indicates normal termination. */
30 #define __WIFEXITED(status) (__WTERMSIG(status) == 0)
32 -/* Nonzero if STATUS indicates termination by a signal. */
33 -#define __WIFSIGNALED(status) \
34 - (((signed char) (((status) & 0x7f) + 1) >> 1) > 0)
35 +/* Nonzero if STATUS indicates termination by a signal.
36 + * Note that status 0x007f is "died from signal 127", not "stopped by signal 0".
37 + * This does happen on MIPS.
38 + * The comparison is "< 0xff", not "< 0x7f", because WCOREDUMP bit (0x80)
41 +#define __WIFSIGNALED(status) (((unsigned)((status) & 0xffff) - 1U) < 0xffU)
43 /* Nonzero if STATUS indicates the child is stopped. */
44 +#if !defined(__mips__)
45 #define __WIFSTOPPED(status) (((status) & 0xff) == 0x7f)
47 +#define __WIFSTOPPED(status) (((status) & 0xff) == 0x7f && ((status) & 0xff00))
50 /* Nonzero if STATUS indicates the child continued after a stop. We only
51 define this if <bits/waitflags.h> provides the WCONTINUED flag bit. */