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authorThomas Schwinge <tschwinge@gnu.org>2012-09-19 11:10:54 +0000
committerThomas Schwinge <tschwinge@gnu.org>2012-09-19 11:10:54 +0000
commita6521d9a4be74bb6f57e25d5a237cfc1a01f13bf (patch)
tree7bbb0253bf16f188b68ce889766b740ed291dee7
parentf92589cba1cb4e3ca65c1b97d797d7ddc5660226 (diff)
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* sh-tdep.c (sh_register_convert_to_virtual) (sh_register_convert_to_raw): Add a gdbarch parameter. Update all callers. Just do a memcpy if not the little-endian case.
-rw-r--r--gdb/ChangeLog4
-rw-r--r--gdb/sh-tdep.c54
2 files changed, 39 insertions, 19 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index ce9d338..c306d2c 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,9 @@
2012-09-19 Thomas Schwinge <thomas@codesourcery.com>
+ * sh-tdep.c (sh_register_convert_to_virtual)
+ (sh_register_convert_to_raw): Add a gdbarch parameter. Update
+ all callers. Just do a memcpy if not the little-endian case.
+
* h8300-tdep.c (h8300_gdbarch_init): Invoke
set_gdbarch_double_format and set_gdbarch_long_double_format.
* m68hc11-tdep.c (m68hc11_gdbarch_init): Invoke
diff --git a/gdb/sh-tdep.c b/gdb/sh-tdep.c
index fc462a4..8592ed4 100644
--- a/gdb/sh-tdep.c
+++ b/gdb/sh-tdep.c
@@ -342,15 +342,16 @@ sh_sh4_register_name (struct gdbarch *gdbarch, int reg_nr)
"r0b0", "r1b0", "r2b0", "r3b0", "r4b0", "r5b0", "r6b0", "r7b0",
/* bank 1 51 - 58 */
"r0b1", "r1b1", "r2b1", "r3b1", "r4b1", "r5b1", "r6b1", "r7b1",
+ /* 59 - 66 */
"", "", "", "", "", "", "", "",
/* pseudo bank register. */
"",
- /* double precision (pseudo) 59 - 66 */
+ /* double precision (pseudo) 68 - 75 */
"dr0", "dr2", "dr4", "dr6", "dr8", "dr10", "dr12", "dr14",
- /* vectors (pseudo) 67 - 70 */
+ /* vectors (pseudo) 76 - 79 */
"fv0", "fv4", "fv8", "fv12",
- /* FIXME: missing XF 71 - 86 */
- /* FIXME: missing XD 87 - 94 */
+ /* FIXME: missing XF */
+ /* FIXME: missing XD */
};
if (reg_nr < 0)
return NULL;
@@ -379,12 +380,13 @@ sh_sh4_nofpu_register_name (struct gdbarch *gdbarch, int reg_nr)
"r0b0", "r1b0", "r2b0", "r3b0", "r4b0", "r5b0", "r6b0", "r7b0",
/* bank 1 51 - 58 */
"r0b1", "r1b1", "r2b1", "r3b1", "r4b1", "r5b1", "r6b1", "r7b1",
+ /* 59 - 66 */
"", "", "", "", "", "", "", "",
/* pseudo bank register. */
"",
- /* double precision (pseudo) 59 - 66 -- not for nofpu target */
+ /* double precision (pseudo) 68 - 75 -- not for nofpu target */
"", "", "", "", "", "", "", "",
- /* vectors (pseudo) 67 - 70 -- not for nofpu target */
+ /* vectors (pseudo) 76 - 79 -- not for nofpu target */
"", "", "", "",
};
if (reg_nr < 0)
@@ -1521,16 +1523,16 @@ sh_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
/* On the sh4, the DRi pseudo registers are problematic if the target
is little endian. When the user writes one of those registers, for
- instance with 'ser var $dr0=1', we want the double to be stored
+ instance with 'set var $dr0=1', we want the double to be stored
like this:
- fr0 = 0x00 0x00 0x00 0x00 0x00 0xf0 0x3f
- fr1 = 0x00 0x00 0x00 0x00 0x00 0x00 0x00
+ fr0 = 0x00 0x00 0xf0 0x3f
+ fr1 = 0x00 0x00 0x00 0x00
This corresponds to little endian byte order & big endian word
order. However if we let gdb write the register w/o conversion, it
will write fr0 and fr1 this way:
- fr0 = 0x00 0x00 0x00 0x00 0x00 0x00 0x00
- fr1 = 0x00 0x00 0x00 0x00 0x00 0xf0 0x3f
+ fr0 = 0x00 0x00 0x00 0x00
+ fr1 = 0x00 0x00 0xf0 0x3f
because it will consider fr0 and fr1 as a single LE stretch of memory.
To achieve what we want we must force gdb to store things in
@@ -1539,16 +1541,23 @@ sh_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
In case the target is big endian, there is no problem, the
raw bytes will look like:
- fr0 = 0x3f 0xf0 0x00 0x00 0x00 0x00 0x00
- fr1 = 0x00 0x00 0x00 0x00 0x00 0x00 0x00
+ fr0 = 0x3f 0xf0 0x00 0x00
+ fr1 = 0x00 0x00 0x00 0x00
The other pseudo registers (the FVs) also don't pose a problem
because they are stored as 4 individual FP elements. */
static void
-sh_register_convert_to_virtual (int regnum, struct type *type,
- char *from, char *to)
+sh_register_convert_to_virtual (struct gdbarch *gdbarch, int regnum,
+ struct type *type, char *from, char *to)
{
+ if (gdbarch_byte_order (gdbarch) != BFD_ENDIAN_LITTLE)
+ {
+ /* It is a no-op. */
+ memcpy (to, from, register_size (gdbarch, regnum));
+ return;
+ }
+
if (regnum >= DR0_REGNUM && regnum <= DR_LAST_REGNUM)
{
DOUBLEST val;
@@ -1562,9 +1571,16 @@ sh_register_convert_to_virtual (int regnum, struct type *type,
}
static void
-sh_register_convert_to_raw (struct type *type, int regnum,
- const void *from, void *to)
+sh_register_convert_to_raw (struct gdbarch *gdbarch, struct type *type,
+ int regnum, const void *from, void *to)
{
+ if (gdbarch_byte_order (gdbarch) != BFD_ENDIAN_LITTLE)
+ {
+ /* It is a no-op. */
+ memcpy (to, from, register_size (gdbarch, regnum));
+ return;
+ }
+
if (regnum >= DR0_REGNUM && regnum <= DR_LAST_REGNUM)
{
DOUBLEST val = extract_typed_floating (from, type);
@@ -1643,7 +1659,7 @@ sh_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
if (status == REG_VALID)
{
/* We must pay attention to the endiannes. */
- sh_register_convert_to_virtual (reg_nr,
+ sh_register_convert_to_virtual (gdbarch, reg_nr,
register_type (gdbarch, reg_nr),
temp_buffer, buffer);
}
@@ -1685,7 +1701,7 @@ sh_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
base_regnum = dr_reg_base_num (gdbarch, reg_nr);
/* We must pay attention to the endiannes. */
- sh_register_convert_to_raw (register_type (gdbarch, reg_nr),
+ sh_register_convert_to_raw (gdbarch, register_type (gdbarch, reg_nr),
reg_nr, buffer, temp_buffer);
/* Write the real regs for which this one is an alias. */