[AArch64] Use int64_t for address offset

In AArch64 displaced stepping and fast tracepoint, GDB/GDBserver needs
to check whether the offset can fit in the range.  We are using int32_t
for offset, it is sufficient to get an offset from an instruction, but
it is not enough to get an offset from two addresses.  For example,
we have a BL in shared lib which is at 0x0000002000040774, and the
scratch pad for displaced stepping is at 0x400698.  The offset can't
fit in 28 bit imm.  However, since we are using int32_t for offset, GDB
thinks the offset can fit it, and generate the B instruction with wrong
offset.

It fixes the following fail,

-FAIL: gdb.base/dso2dso.exp: next over call to sub2

gdb:

2016-06-28  Yao Qi  <yao.qi@linaro.org>

	* aarch64-tdep.c (aarch64_displaced_step_b): Use int64_t for
	variable new_offset.

gdb/gdbserver:

2016-06-28  Yao Qi  <yao.qi@linaro.org>

	* linux-aarch64-low.c (aarch64_ftrace_insn_reloc_b): Use int64_t
	for variable new_offset.
	(aarch64_ftrace_insn_reloc_b_cond): Likewise.
	(aarch64_ftrace_insn_reloc_cb): Likewise.
	(aarch64_ftrace_insn_reloc_tb): Likewise.
	(aarch64_install_fast_tracepoint_jump_pad): Likewise.  Use
	PRIx64 instead of PRIx32.

gdb/ChangeLog

@@ -1,3 +1,8 @@
+2016-06-28  Yao Qi  <yao.qi@linaro.org>
+
+	* aarch64-tdep.c (aarch64_displaced_step_b): Use int64_t for
+	variable new_offset.
+
 2016-06-27  Manish Goregaokar  <manish@mozilla.com>
 
 	* rust-lang.c (rust_print_type, rust_decorations): Print unit

gdb/aarch64-tdep.c

@@ -2322,7 +2322,7 @@ aarch64_displaced_step_b (const int is_bl, const int32_t offset,
 {
   struct aarch64_displaced_step_data *dsd
     = (struct aarch64_displaced_step_data *) data;
-  int32_t new_offset = data->insn_addr - dsd->new_addr + offset;
+  int64_t new_offset = data->insn_addr - dsd->new_addr + offset;
 
   if (can_encode_int32 (new_offset, 28))
     {

gdb/gdbserver/ChangeLog

@@ -1,3 +1,13 @@
+2016-06-28  Yao Qi  <yao.qi@linaro.org>
+
+	* linux-aarch64-low.c (aarch64_ftrace_insn_reloc_b): Use int64_t
+	for variable new_offset.
+	(aarch64_ftrace_insn_reloc_b_cond): Likewise.
+	(aarch64_ftrace_insn_reloc_cb): Likewise.
+	(aarch64_ftrace_insn_reloc_tb): Likewise.
+	(aarch64_install_fast_tracepoint_jump_pad): Likewise.  Use
+	PRIx64 instead of PRIx32.
+
 2016-06-28  Yao Qi  <yao.qi@linaro.org>
 
 	* linux-arm-low.c (arm_get_syscall_trapinfo): New function.

gdb/gdbserver/linux-aarch64-low.c

@@ -1575,7 +1575,7 @@ aarch64_ftrace_insn_reloc_b (const int is_bl, const int32_t offset,
 {
   struct aarch64_insn_relocation_data *insn_reloc
     = (struct aarch64_insn_relocation_data *) data;
-  int32_t new_offset
+  int64_t new_offset
     = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset;
 
   if (can_encode_int32 (new_offset, 28))
@@ -1590,7 +1590,7 @@ aarch64_ftrace_insn_reloc_b_cond (const unsigned cond, const int32_t offset,
 {
   struct aarch64_insn_relocation_data *insn_reloc
     = (struct aarch64_insn_relocation_data *) data;
-  int32_t new_offset
+  int64_t new_offset
     = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset;
 
   if (can_encode_int32 (new_offset, 21))
@@ -1627,7 +1627,7 @@ aarch64_ftrace_insn_reloc_cb (const int32_t offset, const int is_cbnz,
 {
   struct aarch64_insn_relocation_data *insn_reloc
     = (struct aarch64_insn_relocation_data *) data;
-  int32_t new_offset
+  int64_t new_offset
     = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset;
 
   if (can_encode_int32 (new_offset, 21))
@@ -1664,7 +1664,7 @@ aarch64_ftrace_insn_reloc_tb (const int32_t offset, int is_tbnz,
 {
   struct aarch64_insn_relocation_data *insn_reloc
     = (struct aarch64_insn_relocation_data *) data;
-  int32_t new_offset
+  int64_t new_offset
     = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset;
 
   if (can_encode_int32 (new_offset, 16))
@@ -1800,7 +1800,7 @@ aarch64_install_fast_tracepoint_jump_pad (CORE_ADDR tpoint,
 {
   uint32_t buf[256];
   uint32_t *p = buf;
-  int32_t offset;
+  int64_t offset;
   int i;
   uint32_t insn;
   CORE_ADDR buildaddr = *jump_entry;
@@ -2137,7 +2137,7 @@ aarch64_install_fast_tracepoint_jump_pad (CORE_ADDR tpoint,
     {
       sprintf (err,
 	       "E.Jump back from jump pad too far from tracepoint "
-	       "(offset 0x%" PRIx32 " cannot be encoded in 28 bits).",
+	       "(offset 0x%" PRIx64 " cannot be encoded in 28 bits).",
 	       offset);
       return 1;
     }
@@ -2151,7 +2151,7 @@ aarch64_install_fast_tracepoint_jump_pad (CORE_ADDR tpoint,
     {
       sprintf (err,
 	       "E.Jump pad too far from tracepoint "
-	       "(offset 0x%" PRIx32 " cannot be encoded in 28 bits).",
+	       "(offset 0x%" PRIx64 " cannot be encoded in 28 bits).",
 	       offset);
       return 1;
     }