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authorPeter Maydell <peter.maydell@linaro.org>2016-07-15 16:50:47 +0100
committerRiku Voipio <riku.voipio@linaro.org>2016-08-04 16:36:53 +0300
commit005eb2ae1ff6728de7e6998b7456bd72d4456383 (patch)
tree6370d34caba51bd895efba82080f6164313229e5 /linux-user
parent332c9781f6a7c496adf605a1be72776598c7adc2 (diff)
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linux-user: Fix target_semid_ds structure definition
The target_semid_ds structure is not correct for all architectures: the padding fields should only exist for: * 32-bit ABIs * x86 It is also misnamed, since it is following the kernel semid64_ds structure (QEMU doesn't support the legacy semid_ds structure at all). Rename the struct, provide a correct generic definition and allow the oddball x86 architecture to provide its own version. This fixes broken SYSV semaphores for all our 64-bit architectures except x86 and ppc. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Diffstat (limited to 'linux-user')
-rw-r--r--linux-user/syscall.c17
-rw-r--r--linux-user/x86_64/target_structs.h15
2 files changed, 25 insertions, 7 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 5bc42c0..df6f2a9 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -3754,27 +3754,30 @@ static struct shm_region {
bool in_use;
} shm_regions[N_SHM_REGIONS];
-struct target_semid_ds
+#ifndef TARGET_SEMID64_DS
+/* asm-generic version of this struct */
+struct target_semid64_ds
{
struct target_ipc_perm sem_perm;
abi_ulong sem_otime;
-#if !defined(TARGET_PPC64)
+#if TARGET_ABI_BITS == 32
abi_ulong __unused1;
#endif
abi_ulong sem_ctime;
-#if !defined(TARGET_PPC64)
+#if TARGET_ABI_BITS == 32
abi_ulong __unused2;
#endif
abi_ulong sem_nsems;
abi_ulong __unused3;
abi_ulong __unused4;
};
+#endif
static inline abi_long target_to_host_ipc_perm(struct ipc_perm *host_ip,
abi_ulong target_addr)
{
struct target_ipc_perm *target_ip;
- struct target_semid_ds *target_sd;
+ struct target_semid64_ds *target_sd;
if (!lock_user_struct(VERIFY_READ, target_sd, target_addr, 1))
return -TARGET_EFAULT;
@@ -3802,7 +3805,7 @@ static inline abi_long host_to_target_ipc_perm(abi_ulong target_addr,
struct ipc_perm *host_ip)
{
struct target_ipc_perm *target_ip;
- struct target_semid_ds *target_sd;
+ struct target_semid64_ds *target_sd;
if (!lock_user_struct(VERIFY_WRITE, target_sd, target_addr, 0))
return -TARGET_EFAULT;
@@ -3829,7 +3832,7 @@ static inline abi_long host_to_target_ipc_perm(abi_ulong target_addr,
static inline abi_long target_to_host_semid_ds(struct semid_ds *host_sd,
abi_ulong target_addr)
{
- struct target_semid_ds *target_sd;
+ struct target_semid64_ds *target_sd;
if (!lock_user_struct(VERIFY_READ, target_sd, target_addr, 1))
return -TARGET_EFAULT;
@@ -3845,7 +3848,7 @@ static inline abi_long target_to_host_semid_ds(struct semid_ds *host_sd,
static inline abi_long host_to_target_semid_ds(abi_ulong target_addr,
struct semid_ds *host_sd)
{
- struct target_semid_ds *target_sd;
+ struct target_semid64_ds *target_sd;
if (!lock_user_struct(VERIFY_WRITE, target_sd, target_addr, 0))
return -TARGET_EFAULT;
diff --git a/linux-user/x86_64/target_structs.h b/linux-user/x86_64/target_structs.h
index 3489827..b6e82a8 100644
--- a/linux-user/x86_64/target_structs.h
+++ b/linux-user/x86_64/target_structs.h
@@ -55,4 +55,19 @@ struct target_shmid_ds {
abi_ulong __unused5;
};
+/* The x86 definition differs from the generic one in that the
+ * two padding fields exist whether the ABI is 32 bits or 64 bits.
+ */
+#define TARGET_SEMID64_DS
+struct target_semid64_ds {
+ struct target_ipc_perm sem_perm;
+ abi_ulong sem_otime;
+ abi_ulong __unused1;
+ abi_ulong sem_ctime;
+ abi_ulong __unused2;
+ abi_ulong sem_nsems;
+ abi_ulong __unused3;
+ abi_ulong __unused4;
+};
+
#endif