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authorAlexander Graf <agraf@suse.de>2012-01-31 19:44:41 +0100
committerRiku Voipio <riku.voipio@linaro.org>2012-04-06 18:49:58 +0300
commit6083abd9aa134c9b0804e584f8279f54e6c90a1c (patch)
tree8e142aa5564218708c8670513414c37b8694c473
parent56e904ecb2018e30b10e9ec846635ff3b1e1d923 (diff)
linux-user: add struct old_dev_t compat
The compat LOOP_SET_STATUS ioctl uses struct old_dev_t in its passed struct. That variable type is vastly different between different architectures. Implement wrapping around it so we can use it. This fixes running arm kpartx on an x86_64 host for me. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
-rw-r--r--linux-user/syscall_types.h4
-rw-r--r--thunk.c28
-rw-r--r--thunk.h28
3 files changed, 58 insertions, 2 deletions
diff --git a/linux-user/syscall_types.h b/linux-user/syscall_types.h
index fb8c9c980c..601618df98 100644
--- a/linux-user/syscall_types.h
+++ b/linux-user/syscall_types.h
@@ -83,9 +83,9 @@ STRUCT(mixer_info,
/* loop device ioctls */
STRUCT(loop_info,
TYPE_INT, /* lo_number */
- TYPE_SHORT, /* lo_device */
+ TYPE_OLDDEVT, /* lo_device */
TYPE_ULONG, /* lo_inode */
- TYPE_SHORT, /* lo_rdevice */
+ TYPE_OLDDEVT, /* lo_rdevice */
TYPE_INT, /* lo_offset */
TYPE_INT, /* lo_encrypt_type */
TYPE_INT, /* lo_encrypt_key_size */
diff --git a/thunk.c b/thunk.c
index 06571889ae..8ebbbb46b6 100644
--- a/thunk.c
+++ b/thunk.c
@@ -46,6 +46,7 @@ static inline const argtype *thunk_type_next(const argtype *type_ptr)
case TYPE_LONG:
case TYPE_ULONG:
case TYPE_PTRVOID:
+ case TYPE_OLDDEVT:
return type_ptr;
case TYPE_PTR:
return thunk_type_next_ptr(type_ptr);
@@ -188,6 +189,33 @@ const argtype *thunk_convert(void *dst, const void *src,
#else
#warning unsupported conversion
#endif
+ case TYPE_OLDDEVT:
+ {
+ uint64_t val = 0;
+ switch (thunk_type_size(type_ptr - 1, !to_host)) {
+ case 2:
+ val = *(uint16_t *)src;
+ break;
+ case 4:
+ val = *(uint32_t *)src;
+ break;
+ case 8:
+ val = *(uint64_t *)src;
+ break;
+ }
+ switch (thunk_type_size(type_ptr - 1, to_host)) {
+ case 2:
+ *(uint16_t *)dst = tswap16(val);
+ break;
+ case 4:
+ *(uint32_t *)dst = tswap32(val);
+ break;
+ case 8:
+ *(uint64_t *)dst = tswap64(val);
+ break;
+ }
+ break;
+ }
case TYPE_ARRAY:
{
int array_length, i, dst_size, src_size;
diff --git a/thunk.h b/thunk.h
index 9810743191..5be8f912f5 100644
--- a/thunk.h
+++ b/thunk.h
@@ -37,6 +37,7 @@ typedef enum argtype {
TYPE_PTR,
TYPE_ARRAY,
TYPE_STRUCT,
+ TYPE_OLDDEVT,
} argtype;
#define MK_PTR(type) TYPE_PTR, type
@@ -104,6 +105,31 @@ static inline int thunk_type_size(const argtype *type_ptr, int is_host)
return TARGET_ABI_BITS / 8;
}
break;
+ case TYPE_OLDDEVT:
+ if (is_host) {
+#if defined(HOST_X86_64)
+ return 8;
+#elif defined(HOST_ALPHA) || defined(HOST_IA64) || defined(HOST_MIPS) || \
+ defined(HOST_PARISC) || defined(HOST_SPARC64)
+ return 4;
+#elif defined(HOST_PPC)
+ return HOST_LONG_SIZE;
+#else
+ return 2;
+#endif
+ } else {
+#if defined(TARGET_X86_64)
+ return 8;
+#elif defined(TARGET_ALPHA) || defined(TARGET_IA64) || defined(TARGET_MIPS) || \
+ defined(TARGET_PARISC) || defined(TARGET_SPARC64)
+ return 4;
+#elif defined(TARGET_PPC)
+ return TARGET_ABI_BITS / 8;
+#else
+ return 2;
+#endif
+ }
+ break;
case TYPE_ARRAY:
size = type_ptr[1];
return size * thunk_type_size_array(type_ptr + 2, is_host);
@@ -141,6 +167,8 @@ static inline int thunk_type_align(const argtype *type_ptr, int is_host)
return TARGET_ABI_BITS / 8;
}
break;
+ case TYPE_OLDDEVT:
+ return thunk_type_size(type_ptr, is_host);
case TYPE_ARRAY:
return thunk_type_align_array(type_ptr + 2, is_host);
case TYPE_STRUCT: