This patch introduce decoding for binder ioctls including the command
and return protocol from BINDER_WRITE_READ.
* binder.c: New file.
* xlat/binder_driver_commands.in: New file.
* xlat/binder_driver_returns.in: New file.
* Makefile.am (strace_SOURCES): Add binder.c.
* ioctl.c (ioctl_decode): Call binder_ioctl for 'b' ioctl commands.
* defs.h (binder_ioctl): New prototype.
* configure.ac: Check binder header.
Signed-off-by: Antoine Damhet <antoine.dam...@lse.epita.fr>
Reviewed-by: Gabriel Laskar <gabr...@lse.epita.fr>
---
Makefile.am | 1 +
binder.c | 171 +++++++++++++++++++++++++++++++++++++++++
configure.ac | 39 ++++++++++
defs.h | 1 +
ioctl.c | 4 +
xlat/binder_driver_commands.in | 17 ++++
xlat/binder_driver_returns.in | 18 +++++
7 files changed, 251 insertions(+)
create mode 100644 binder.c
create mode 100644 xlat/binder_driver_commands.in
create mode 100644 xlat/binder_driver_returns.in
diff --git a/Makefile.am b/Makefile.am
index 77e0cc8..fb75e6d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -78,6 +78,7 @@ strace_SOURCES = \
affinity.c \
aio.c \
alpha.c \
+ binder.c \
bjm.c \
block.c \
bpf.c \
diff --git a/binder.c b/binder.c
new file mode 100644
index 0000000..a614c82
--- /dev/null
+++ b/binder.c
@@ -0,0 +1,171 @@
+#include "defs.h"
+
+#if defined(HAVE_LINUX_ANDROID_BINDER_H) || defined(__ANDROID__)
+
+#include <linux/ioctl.h>
+
+/*
+ * The driver can support either 32 or 64 bit but not both at the same time.
+ */
+#if SIZEOF_LONG == 4
+# define BINDER_IPC_32BIT
+#endif
+#ifdef HAVE_LINUX_ANDROID_BINDER_H
+# include <linux/android/binder.h>
+#else
+# include <linux/binder.h>
+#endif
+
+#include "xlat/binder_driver_commands.h"
+#include "xlat/binder_driver_returns.h"
+
+static int
+decode_binder_commands_buffer(struct tcb *tcp, uintptr_t buffer, size_t pos,
+ size_t size, const struct xlat *x, const char *str)
+{
+ if (size < sizeof(uint32_t)) {
+ printaddr(buffer);
+ return 0;
+ }
+
+ if (abbrev(tcp)) {
+ tprints("[...]");
+ return 0;
+ }
+
+ uint32_t type;
+ int first_time = 1;
+ tprints("[");
+
+ while (pos + sizeof(uint32_t) <= size) {
+ if (umove(tcp, buffer + pos, &type)) {
+ tprints("]");
+ return 1;
+ }
+
+ if (!first_time)
+ tprints(", ");
+ else
+ first_time = 0;
+
+ if (_IOC_SIZE(type) > 0
+ && pos + sizeof(type) + _IOC_SIZE(type) <=
size) {
+ tprints("{");
+ printxval(x, type, str);
+ tprints(", ");
+ printstr(tcp, buffer + pos + sizeof(type),
+ _IOC_SIZE(type));
+ tprints("}");
+ } else
+ printxval(x, type, str);
+
+ if (SIZE_MAX - sizeof(uint32_t) + _IOC_SIZE(type) >= pos)
+ pos += sizeof(uint32_t) + _IOC_SIZE(type);
+ else
+ break;
+ }
+
+ tprints("]");
+ return 0;
+}
+
+static int
+decode_binder_write_read(struct tcb *tcp, const long addr)
+{
+ struct binder_write_read wr;
+
+ if (entering(tcp)) {
+ tprints(", ");
+ if (umove_or_printaddr(tcp, addr, &wr))
+ return RVAL_DECODED | 1;
+
+ tprintf("{write_size=%" PRIu64 ", write_consumed=%" PRIu64
+ ", write_buffer=",
+ (uint64_t)wr.write_size,
+ (uint64_t)wr.write_consumed);
+ if (decode_binder_commands_buffer(tcp, wr.write_buffer,
+ wr.write_consumed, wr.write_size,
+ binder_driver_commands, "BC_???")) {
+ tprints("}");
+ return RVAL_DECODED | 1;
+ }
+
+ tprintf(", read_size=%" PRIu64 ", read_consumed=%" PRIu64 "}",
+ (uint64_t)wr.read_size,
+ (uint64_t)wr.read_consumed);
+ return 0;
+ }
+
+ if (syserror(tcp) || umove(tcp, addr, &wr))
+ return RVAL_DECODED | 1;
+
+ tprints(" => ");
+
+ tprintf("{write_size=%" PRIu64 ", write_consumed=%" PRIu64
+ ", read_size=%" PRIu64 ", read_consumed=%" PRIu64
+ ", read_buffer=",
+ (uint64_t)wr.write_size,
+ (uint64_t)wr.write_consumed,
+ (uint64_t)wr.read_size,
+ (uint64_t)wr.read_consumed);
+ if (decode_binder_commands_buffer(tcp, wr.read_buffer, 0,
+ wr.read_consumed,
+ binder_driver_returns, "BR_???")) {
+ tprints("}");
+ return RVAL_DECODED | 1;
+ }
+
+ tprints("}");
+ return RVAL_DECODED | 1;
+}
+
+int
+decode_binder_version(struct tcb *tcp, long addr)
+{
+ struct binder_version version;
+
+ tprints(", ");
+ if (umove_or_printaddr(tcp, addr, &version))
+ return RVAL_DECODED | 1;
+
+ tprintf("{protocol_version=%" PRId32 "}", version.protocol_version);
+ return RVAL_DECODED | 1;
+}
+
+int
+binder_ioctl(struct tcb *tcp, const unsigned int code, long arg)
+{
+ if (!verbose(tcp))
+ return RVAL_DECODED;
+
+ if (code == BINDER_WRITE_READ)
+ return decode_binder_write_read(tcp, arg);
+
+ if (entering(tcp)) {
+ switch (code) {
+ case BINDER_SET_IDLE_TIMEOUT:
+ tprints(", ");
+ printnum_int64(tcp, arg, "%lld");
+ return RVAL_DECODED | 1;
+ case BINDER_SET_MAX_THREADS:
+ tprints(", ");
+ printnum_int(tcp, arg, "%u");
+ return RVAL_DECODED | 1;
+ case BINDER_SET_IDLE_PRIORITY:
+ case BINDER_SET_CONTEXT_MGR:
+ case BINDER_THREAD_EXIT:
+ tprints(", ");
+ printnum_int(tcp, arg, "%d");
+ return RVAL_DECODED | 1;
+ default:
+ break;
+ }
+ } else {
+ if (code == BINDER_VERSION)
+ return decode_binder_version(tcp, arg);
+ }
+
+ return 0;
+}
+
+#endif /* !(HAVE_LINUX_ANDROID_BINDER_H || __ANDROID__) */
diff --git a/configure.ac b/configure.ac
index 9afda73..0d77998 100644
--- a/configure.ac
+++ b/configure.ac
@@ -434,6 +434,45 @@ AC_CHECK_HEADERS([linux/bpf.h], [
fi
])
+AC_CHECK_HEADERS([linux/android/binder.h], [[ #include <sys/types.h>
+#include <linux/android/binder.h>])
+ AC_CHECK_DECLS(m4_normalize([BC_TRANSACTION,
+ BC_REPLY,
+ BC_ACQUIRE_RESULT,
+ BC_FREE_BUFFER,
+ BC_INCREFS,
+ BC_ACQUIRE,
+ BC_RELEASE,
+ BC_DECREFS,
+ BC_INCREFS_DONE,
+ BC_ACQUIRE_DONE,
+ BC_ATTEMPT_ACQUIRE,
+ BC_REGISTER_LOOPER,
+ BC_ENTER_LOOPER,
+ BC_EXIT_LOOPER,
+ BC_REQUEST_DEATH_NOTIFICATION,
+ BC_CLEAR_DEATH_NOTIFICATION,
+ BC_DEAD_BINDER_DONE,
+ BR_ERROR,
+ BR_OK,
+ BR_TRANSACTION,
+ BR_REPLY,
+ BR_ACQUIRE_RESULT,
+ BR_DEAD_REPLY,
+ BR_TRANSACTION_COMPLETE,
+ BR_INCREFS,
+ BR_ACQUIRE,
+ BR_RELEASE,
+ BR_DECREFS,
+ BR_ATTEMPT_ACQUIRE,
+ BR_NOOP,
+ BR_SPAWN_LOOPER,
+ BR_FINISHED,
+ BR_DEAD_BINDER,
+ BR_CLEAR_DEATH_NOTIFICATION_DONE,
+ BR_FAILED_REPLY]),,,[ #include <sys/types.h>
+#include <linux/android/binder.h>])])
+
AC_CHECK_TYPES([struct statfs], [
AC_CHECK_MEMBERS([struct statfs.f_frsize],,, [#include <linux/types.h>
#include <asm/statfs.h>])
diff --git a/defs.h b/defs.h
index 99447e6..367a6e9 100644
--- a/defs.h
+++ b/defs.h
@@ -682,6 +682,7 @@ struct strace_statfs;
extern void print_struct_statfs(struct tcb *tcp, long);
extern void print_struct_statfs64(struct tcb *tcp, long, unsigned long);
+extern int binder_ioctl(struct tcb *, const unsigned int, long);
extern int file_ioctl(struct tcb *, const unsigned int, long);
extern int fs_x_ioctl(struct tcb *, const unsigned int, long);
extern int loop_ioctl(struct tcb *, const unsigned int, long);
diff --git a/ioctl.c b/ioctl.c
index e4b20d9..54aa9a7 100644
--- a/ioctl.c
+++ b/ioctl.c
@@ -282,6 +282,10 @@ ioctl_decode(struct tcb *tcp)
case 0x94:
return btrfs_ioctl(tcp, code, arg);
#endif
+#if defined(HAVE_LINUX_ANDROID_BINDER_H) || defined(__ANDROID__)
+ case 'b':
+ return binder_ioctl(tcp, code, arg);
+#endif
default:
break;
}
diff --git a/xlat/binder_driver_commands.in b/xlat/binder_driver_commands.in
new file mode 100644
index 0000000..84d481c
--- /dev/null
+++ b/xlat/binder_driver_commands.in
@@ -0,0 +1,17 @@
+BC_TRANSACTION
+BC_REPLY
+BC_ACQUIRE_RESULT
+BC_FREE_BUFFER
+BC_INCREFS
+BC_ACQUIRE
+BC_RELEASE
+BC_DECREFS
+BC_INCREFS_DONE
+BC_ACQUIRE_DONE
+BC_ATTEMPT_ACQUIRE
+BC_REGISTER_LOOPER
+BC_ENTER_LOOPER
+BC_EXIT_LOOPER
+BC_REQUEST_DEATH_NOTIFICATION
+BC_CLEAR_DEATH_NOTIFICATION
+BC_DEAD_BINDER_DONE
diff --git a/xlat/binder_driver_returns.in b/xlat/binder_driver_returns.in
new file mode 100644
index 0000000..dc4c4c1
--- /dev/null
+++ b/xlat/binder_driver_returns.in
@@ -0,0 +1,18 @@
+BR_ERROR
+BR_OK
+BR_TRANSACTION
+BR_REPLY
+BR_ACQUIRE_RESULT
+BR_DEAD_REPLY
+BR_TRANSACTION_COMPLETE
+BR_INCREFS
+BR_ACQUIRE
+BR_RELEASE
+BR_DECREFS
+BR_ATTEMPT_ACQUIRE
+BR_NOOP
+BR_SPAWN_LOOPER
+BR_FINISHED
+BR_DEAD_BINDER
+BR_CLEAR_DEATH_NOTIFICATION_DONE
+BR_FAILED_REPLY
--
2.8.3
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