aboutsummaryrefslogtreecommitdiff
path: root/linux-user
diff options
context:
space:
mode:
Diffstat (limited to 'linux-user')
-rw-r--r--linux-user/arm/target_syscall.h7
-rw-r--r--linux-user/mips/target_syscall.h7
-rw-r--r--linux-user/mips64/target_syscall.h7
-rw-r--r--linux-user/sh4/target_syscall.h7
-rw-r--r--linux-user/sparc/target_syscall.h16
-rw-r--r--linux-user/syscall.c45
6 files changed, 83 insertions, 6 deletions
diff --git a/linux-user/arm/target_syscall.h b/linux-user/arm/target_syscall.h
index cd021ff598..0879b4d4a8 100644
--- a/linux-user/arm/target_syscall.h
+++ b/linux-user/arm/target_syscall.h
@@ -33,4 +33,11 @@ struct target_pt_regs {
#define TARGET_MLOCKALL_MCL_CURRENT 1
#define TARGET_MLOCKALL_MCL_FUTURE 2
+#define TARGET_FORCE_SHMLBA
+
+static inline abi_ulong target_shmlba(CPUARMState *env)
+{
+ return 4 * 4096;
+}
+
#endif /* ARM_TARGET_SYSCALL_H */
diff --git a/linux-user/mips/target_syscall.h b/linux-user/mips/target_syscall.h
index 2b4f390729..6c666dcb73 100644
--- a/linux-user/mips/target_syscall.h
+++ b/linux-user/mips/target_syscall.h
@@ -230,4 +230,11 @@ struct target_pt_regs {
#define TARGET_MLOCKALL_MCL_CURRENT 1
#define TARGET_MLOCKALL_MCL_FUTURE 2
+#define TARGET_FORCE_SHMLBA
+
+static inline abi_ulong target_shmlba(CPUMIPSState *env)
+{
+ return 0x40000;
+}
+
#endif /* MIPS_TARGET_SYSCALL_H */
diff --git a/linux-user/mips64/target_syscall.h b/linux-user/mips64/target_syscall.h
index 8da9c1f9cc..a9c17f7edf 100644
--- a/linux-user/mips64/target_syscall.h
+++ b/linux-user/mips64/target_syscall.h
@@ -227,4 +227,11 @@ struct target_pt_regs {
#define TARGET_MLOCKALL_MCL_CURRENT 1
#define TARGET_MLOCKALL_MCL_FUTURE 2
+#define TARGET_FORCE_SHMLBA
+
+static inline abi_ulong target_shmlba(CPUMIPSState *env)
+{
+ return 0x40000;
+}
+
#endif /* MIPS64_TARGET_SYSCALL_H */
diff --git a/linux-user/sh4/target_syscall.h b/linux-user/sh4/target_syscall.h
index 78d5557124..2b5f75be13 100644
--- a/linux-user/sh4/target_syscall.h
+++ b/linux-user/sh4/target_syscall.h
@@ -19,4 +19,11 @@ struct target_pt_regs {
#define TARGET_MLOCKALL_MCL_CURRENT 1
#define TARGET_MLOCKALL_MCL_FUTURE 2
+#define TARGET_FORCE_SHMLBA
+
+static inline abi_ulong target_shmlba(CPUSH4State *env)
+{
+ return 0x4000;
+}
+
#endif /* SH4_TARGET_SYSCALL_H */
diff --git a/linux-user/sparc/target_syscall.h b/linux-user/sparc/target_syscall.h
index 326f674b4e..f97aa6b075 100644
--- a/linux-user/sparc/target_syscall.h
+++ b/linux-user/sparc/target_syscall.h
@@ -22,4 +22,20 @@ struct target_pt_regs {
#define TARGET_MLOCKALL_MCL_CURRENT 0x2000
#define TARGET_MLOCKALL_MCL_FUTURE 0x4000
+/* For SPARC SHMLBA is determined at runtime in the kernel, and
+ * libc has to runtime-detect it using the hwcaps (see glibc
+ * sysdeps/unix/sysv/linux/sparc/getshmlba; we follow the same
+ * logic here, though we know we're not the sparc v9 64-bit case).
+ */
+#define TARGET_FORCE_SHMLBA
+
+static inline abi_ulong target_shmlba(CPUSPARCState *env)
+{
+ if (!(env->def->features & CPU_FEATURE_FLUSH)) {
+ return 64 * 1024;
+ } else {
+ return 256 * 1024;
+ }
+}
+
#endif /* SPARC_TARGET_SYSCALL_H */
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index e28690713a..85699f9f31 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -4575,12 +4575,34 @@ static inline abi_long do_shmctl(int shmid, int cmd, abi_long buf)
return ret;
}
-static inline abi_ulong do_shmat(int shmid, abi_ulong shmaddr, int shmflg)
+#ifndef TARGET_FORCE_SHMLBA
+/* For most architectures, SHMLBA is the same as the page size;
+ * some architectures have larger values, in which case they should
+ * define TARGET_FORCE_SHMLBA and provide a target_shmlba() function.
+ * This corresponds to the kernel arch code defining __ARCH_FORCE_SHMLBA
+ * and defining its own value for SHMLBA.
+ *
+ * The kernel also permits SHMLBA to be set by the architecture to a
+ * value larger than the page size without setting __ARCH_FORCE_SHMLBA;
+ * this means that addresses are rounded to the large size if
+ * SHM_RND is set but addresses not aligned to that size are not rejected
+ * as long as they are at least page-aligned. Since the only architecture
+ * which uses this is ia64 this code doesn't provide for that oddity.
+ */
+static inline abi_ulong target_shmlba(CPUArchState *cpu_env)
+{
+ return TARGET_PAGE_SIZE;
+}
+#endif
+
+static inline abi_ulong do_shmat(CPUArchState *cpu_env,
+ int shmid, abi_ulong shmaddr, int shmflg)
{
abi_long raddr;
void *host_raddr;
struct shmid_ds shm_info;
int i,ret;
+ abi_ulong shmlba;
/* find out the length of the shared memory segment */
ret = get_errno(shmctl(shmid, IPC_STAT, &shm_info));
@@ -4589,6 +4611,16 @@ static inline abi_ulong do_shmat(int shmid, abi_ulong shmaddr, int shmflg)
return ret;
}
+ shmlba = target_shmlba(cpu_env);
+
+ if (shmaddr & (shmlba - 1)) {
+ if (shmflg & SHM_RND) {
+ shmaddr &= ~(shmlba - 1);
+ } else {
+ return -TARGET_EINVAL;
+ }
+ }
+
mmap_lock();
if (shmaddr)
@@ -4647,7 +4679,8 @@ static inline abi_long do_shmdt(abi_ulong shmaddr)
#ifdef TARGET_NR_ipc
/* ??? This only works with linear mappings. */
/* do_ipc() must return target values and target errnos. */
-static abi_long do_ipc(unsigned int call, abi_long first,
+static abi_long do_ipc(CPUArchState *cpu_env,
+ unsigned int call, abi_long first,
abi_long second, abi_long third,
abi_long ptr, abi_long fifth)
{
@@ -4716,7 +4749,7 @@ static abi_long do_ipc(unsigned int call, abi_long first,
default:
{
abi_ulong raddr;
- raddr = do_shmat(first, ptr, second);
+ raddr = do_shmat(cpu_env, first, ptr, second);
if (is_error(raddr))
return get_errno(raddr);
if (put_user_ual(raddr, third))
@@ -9304,8 +9337,8 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
break;
#ifdef TARGET_NR_ipc
case TARGET_NR_ipc:
- ret = do_ipc(arg1, arg2, arg3, arg4, arg5, arg6);
- break;
+ ret = do_ipc(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
+ break;
#endif
#ifdef TARGET_NR_semget
case TARGET_NR_semget:
@@ -9354,7 +9387,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
#endif
#ifdef TARGET_NR_shmat
case TARGET_NR_shmat:
- ret = do_shmat(arg1, arg2, arg3);
+ ret = do_shmat(cpu_env, arg1, arg2, arg3);
break;
#endif
#ifdef TARGET_NR_shmdt
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-30 20:05:01 +0000