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Diffstat (limited to 'gdb/rs6000-tdep.c')
-rw-r--r--gdb/rs6000-tdep.c119
1 files changed, 77 insertions, 42 deletions
diff --git a/gdb/rs6000-tdep.c b/gdb/rs6000-tdep.c
index 6ac3e8d..b8c87fb 100644
--- a/gdb/rs6000-tdep.c
+++ b/gdb/rs6000-tdep.c
@@ -2536,6 +2536,11 @@ rs6000_value_to_register (struct frame_info *frame,
put_frame_register (frame, regnum, to);
}
+ /* The type of a function that moves the value of REG between CACHE
+ or BUF --- in either direction. */
+typedef enum register_status (*move_ev_register_func) (struct regcache *,
+ int, void *);
+
/* Move SPE vector register values between a 64-bit buffer and the two
32-bit raw register halves in a regcache. This function handles
both splitting a 64-bit value into two 32-bit halves, and joining
@@ -2559,16 +2564,16 @@ rs6000_value_to_register (struct frame_info *frame,
MOVE, since this function can't tell at compile-time which of
REGCACHE or BUFFER is acting as the source of the data. If C had
co-variant type qualifiers, ... */
-static void
-e500_move_ev_register (void (*move) (struct regcache *regcache,
- int regnum, gdb_byte *buf),
- struct regcache *regcache, int ev_reg,
- gdb_byte *buffer)
+
+static enum register_status
+e500_move_ev_register (move_ev_register_func move,
+ struct regcache *regcache, int ev_reg, void *buffer)
{
struct gdbarch *arch = get_regcache_arch (regcache);
struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
int reg_index;
gdb_byte *byte_buffer = buffer;
+ enum register_status status;
gdb_assert (IS_SPE_PSEUDOREG (tdep, ev_reg));
@@ -2576,55 +2581,80 @@ e500_move_ev_register (void (*move) (struct regcache *regcache,
if (gdbarch_byte_order (arch) == BFD_ENDIAN_BIG)
{
- move (regcache, tdep->ppc_ev0_upper_regnum + reg_index, byte_buffer);
- move (regcache, tdep->ppc_gp0_regnum + reg_index, byte_buffer + 4);
+ status = move (regcache, tdep->ppc_ev0_upper_regnum + reg_index,
+ byte_buffer);
+ if (status == REG_VALID)
+ status = move (regcache, tdep->ppc_gp0_regnum + reg_index,
+ byte_buffer + 4);
}
else
{
- move (regcache, tdep->ppc_gp0_regnum + reg_index, byte_buffer);
- move (regcache, tdep->ppc_ev0_upper_regnum + reg_index, byte_buffer + 4);
+ status = move (regcache, tdep->ppc_gp0_regnum + reg_index, byte_buffer);
+ if (status == REG_VALID)
+ status = move (regcache, tdep->ppc_ev0_upper_regnum + reg_index,
+ byte_buffer + 4);
}
+
+ return status;
}
-static void
+static enum register_status
+do_regcache_raw_read (struct regcache *regcache, int regnum, void *buffer)
+{
+ return regcache_raw_read (regcache, regnum, buffer);
+}
+
+static enum register_status
+do_regcache_raw_write (struct regcache *regcache, int regnum, void *buffer)
+{
+ regcache_raw_write (regcache, regnum, buffer);
+
+ return REG_VALID;
+}
+
+static enum register_status
e500_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
int reg_nr, gdb_byte *buffer)
{
- e500_move_ev_register (regcache_raw_read, regcache, reg_nr, buffer);
+ return e500_move_ev_register (do_regcache_raw_read, regcache, reg_nr, buffer);
}
static void
e500_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
int reg_nr, const gdb_byte *buffer)
{
- e500_move_ev_register ((void (*) (struct regcache *, int, gdb_byte *))
- regcache_raw_write,
- regcache, reg_nr, (gdb_byte *) buffer);
+ e500_move_ev_register (do_regcache_raw_write, regcache,
+ reg_nr, (void *) buffer);
}
/* Read method for DFP pseudo-registers. */
-static void
+static enum register_status
dfp_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
int reg_nr, gdb_byte *buffer)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
int reg_index = reg_nr - tdep->ppc_dl0_regnum;
+ enum register_status status;
if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
{
/* Read two FP registers to form a whole dl register. */
- regcache_raw_read (regcache, tdep->ppc_fp0_regnum +
- 2 * reg_index, buffer);
- regcache_raw_read (regcache, tdep->ppc_fp0_regnum +
- 2 * reg_index + 1, buffer + 8);
+ status = regcache_raw_read (regcache, tdep->ppc_fp0_regnum +
+ 2 * reg_index, buffer);
+ if (status == REG_VALID)
+ status = regcache_raw_read (regcache, tdep->ppc_fp0_regnum +
+ 2 * reg_index + 1, buffer + 8);
}
else
{
- regcache_raw_read (regcache, tdep->ppc_fp0_regnum +
- 2 * reg_index + 1, buffer + 8);
- regcache_raw_read (regcache, tdep->ppc_fp0_regnum +
- 2 * reg_index, buffer);
+ status = regcache_raw_read (regcache, tdep->ppc_fp0_regnum +
+ 2 * reg_index + 1, buffer + 8);
+ if (status == REG_VALID)
+ status = regcache_raw_read (regcache, tdep->ppc_fp0_regnum +
+ 2 * reg_index, buffer);
}
+
+ return status;
}
/* Write method for DFP pseudo-registers. */
@@ -2654,33 +2684,38 @@ dfp_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
}
/* Read method for POWER7 VSX pseudo-registers. */
-static void
+static enum register_status
vsx_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
int reg_nr, gdb_byte *buffer)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
int reg_index = reg_nr - tdep->ppc_vsr0_regnum;
+ enum register_status status;
/* Read the portion that overlaps the VMX registers. */
if (reg_index > 31)
- regcache_raw_read (regcache, tdep->ppc_vr0_regnum +
- reg_index - 32, buffer);
+ status = regcache_raw_read (regcache, tdep->ppc_vr0_regnum +
+ reg_index - 32, buffer);
else
/* Read the portion that overlaps the FPR registers. */
if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
{
- regcache_raw_read (regcache, tdep->ppc_fp0_regnum +
- reg_index, buffer);
- regcache_raw_read (regcache, tdep->ppc_vsr0_upper_regnum +
- reg_index, buffer + 8);
+ status = regcache_raw_read (regcache, tdep->ppc_fp0_regnum +
+ reg_index, buffer);
+ if (status == REG_VALID)
+ status = regcache_raw_read (regcache, tdep->ppc_vsr0_upper_regnum +
+ reg_index, buffer + 8);
}
else
{
- regcache_raw_read (regcache, tdep->ppc_fp0_regnum +
- reg_index, buffer + 8);
- regcache_raw_read (regcache, tdep->ppc_vsr0_upper_regnum +
- reg_index, buffer);
+ status = regcache_raw_read (regcache, tdep->ppc_fp0_regnum +
+ reg_index, buffer + 8);
+ if (status == REG_VALID)
+ status = regcache_raw_read (regcache, tdep->ppc_vsr0_upper_regnum +
+ reg_index, buffer);
}
+
+ return status;
}
/* Write method for POWER7 VSX pseudo-registers. */
@@ -2714,7 +2749,7 @@ vsx_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
}
/* Read method for POWER7 Extended FP pseudo-registers. */
-static void
+static enum register_status
efpr_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
int reg_nr, gdb_byte *buffer)
{
@@ -2722,8 +2757,8 @@ efpr_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
int reg_index = reg_nr - tdep->ppc_efpr0_regnum;
/* Read the portion that overlaps the VMX register. */
- regcache_raw_read_part (regcache, tdep->ppc_vr0_regnum + reg_index, 0,
- register_size (gdbarch, reg_nr), buffer);
+ return regcache_raw_read_part (regcache, tdep->ppc_vr0_regnum + reg_index, 0,
+ register_size (gdbarch, reg_nr), buffer);
}
/* Write method for POWER7 Extended FP pseudo-registers. */
@@ -2739,7 +2774,7 @@ efpr_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
register_size (gdbarch, reg_nr), buffer);
}
-static void
+static enum register_status
rs6000_pseudo_register_read (struct gdbarch *gdbarch,
struct regcache *regcache,
int reg_nr, gdb_byte *buffer)
@@ -2750,13 +2785,13 @@ rs6000_pseudo_register_read (struct gdbarch *gdbarch,
gdb_assert (regcache_arch == gdbarch);
if (IS_SPE_PSEUDOREG (tdep, reg_nr))
- e500_pseudo_register_read (gdbarch, regcache, reg_nr, buffer);
+ return e500_pseudo_register_read (gdbarch, regcache, reg_nr, buffer);
else if (IS_DFP_PSEUDOREG (tdep, reg_nr))
- dfp_pseudo_register_read (gdbarch, regcache, reg_nr, buffer);
+ return dfp_pseudo_register_read (gdbarch, regcache, reg_nr, buffer);
else if (IS_VSX_PSEUDOREG (tdep, reg_nr))
- vsx_pseudo_register_read (gdbarch, regcache, reg_nr, buffer);
+ return vsx_pseudo_register_read (gdbarch, regcache, reg_nr, buffer);
else if (IS_EFP_PSEUDOREG (tdep, reg_nr))
- efpr_pseudo_register_read (gdbarch, regcache, reg_nr, buffer);
+ return efpr_pseudo_register_read (gdbarch, regcache, reg_nr, buffer);
else
internal_error (__FILE__, __LINE__,
_("rs6000_pseudo_register_read: "
generated by cgit v1.1 at 2024-12-05 02:15:42 +0000