[LTP] [PATCH 1/:] For mips architecture, SHMLBA is not equal to PAGE_SIZE base_addr is not available address for process after base_addr is aligned to next SHMLBA address. so we should probe a bigger available virtual address space for ensuring that a wide range from base_addr aligned to next SHMLBA to base_addr + INT_SIZE always is available

Wei.Yang
2011-12-27T06:45:57Z

From: Wei Yang <Wei.Yang@windriver.com>

Signed-off-by: Wei Yang <Wei.Yang@windriver.com>
---
testcases/kernel/syscalls/ipc/shmat/shmat01.c | 27 +++++++++++++++++++++++-
1 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/testcases/kernel/syscalls/ipc/shmat/shmat01.c b/testcases/kernel/syscalls/ipc/shmat/shmat01.c
index 7c68459..344ad3f 100644
--- a/testcases/kernel/syscalls/ipc/shmat/shmat01.c
+++ b/testcases/kernel/syscalls/ipc/shmat/shmat01.c
@@ -65,6 +65,9 @@ void check_functionality(int);
#define CASE1 20 /* memory location. */

int shm_id_1 = -1;
+#if defined(__mips__) || defined(__mips64)
+int shm_id_2 = -1;
+#endif

void *base_addr; /* By probing this address first, we can make
* non-aligned addresses from it for different
@@ -262,14 +265,34 @@ void setup(void)
tst_brkm(TBROK, cleanup, "Failed to create shared memory "
"resource 1 in setup()");
}
-
/* Probe an available linear address for attachment */
+#if defined(__mips__) || defined(__mips64)
+ /*
+ * For mips architecture, SHMLBA is not equal to PAGE_SIZE
+ * base_addr is not available address for process after
+ * base_addr is aligned to next SHMLBA address
+ */
+ if ((shm_id_2 = shmget(shmkey++, SHMLBA, SHM_RW | IPC_CREAT | IPC_EXCL)) == -1) {
+ tst_brkm(TBROK, cleanup, "Failed to create shared memory ");
+ }
+ if ((base_addr = shmat(shm_id_2, NULL, 0)) == (void *) -1) {
+ rm_shm(shm_id_2);
+ tst_brkm(TBROK, cleanup, "Couldn't attach shared memory");
+ }
+ if (shmdt((const void *)base_addr) == -1) {
+ rm_shm(shm_id_2);
+ tst_brkm(TBROK, cleanup, "Couldn't detach shared memory");
+ }
+ rm_shm(shm_id_2);
+#else
if ((base_addr = shmat(shm_id_1, NULL, 0)) == (void *)-1) {
tst_brkm(TBROK, cleanup, "Couldn't attach shared memory");
}
if (shmdt((const void *)base_addr) == -1) {
tst_brkm(TBROK, cleanup, "Couldn't detach shared memory");
}
+#endif
+

/* some architectures (e.g. parisc) are strange, so better always align to
* next SHMLBA address. */
@@ -299,4 +322,4 @@ void cleanup(void)
*/
TEST_CLEANUP;

-}
\ No newline at end of file
+}
--
1.7.0.2

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