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authorJeff Law <law@redhat.com>1997-02-10 23:56:56 +0000
committerJeff Law <law@redhat.com>1997-02-10 23:56:56 +0000
commita698d0d06fa53c237244835b97b5657f68a62add (patch)
treea007b75b4e737d57bba0af1a377a1d095ea08f77 /gdb/config
parentefaf2b5892b8ad09a93e0551e183543e5bd18082 (diff)
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* mn10200-tdep.c: Remove lots of debugging printfs, update/improve
comments, formatting, etc. Plus other minor fixes for problems I found during my first pass over the mn10200 port. (mn10200_analyze_prologue): New function. (mn10200_frame_chain, mn10200_init_extra_frame_info): Use it. * config/mn10200/tm-mn10200.h: Lots of updates/improvements to comments, formatting, etc. Minor fixes for problems I found during my first pass over the mn10200 port. (TARGET_*_BIT): Define appropriately for ints, long longs, doubles and pointers. (REGISTER_VIRTUAL_TYPE): Define as a long. (EXTRACT_RETURN_VALUE): Rework to deal with long ints living in register pairs. (STORE_RETURN_VALUE): Similarly. Checking in my initial changes, prologue scanning, etc. Current gdb testsuite results: === gdb Summary === # of expected passes 3684 # of expected failures 40 # of unexpected failures 6
Diffstat (limited to 'gdb/config')
-rw-r--r--gdb/config/mn10200/tm-mn10200.h103
1 files changed, 80 insertions, 23 deletions
diff --git a/gdb/config/mn10200/tm-mn10200.h b/gdb/config/mn10200/tm-mn10200.h
index bba1810..1891075 100644
--- a/gdb/config/mn10200/tm-mn10200.h
+++ b/gdb/config/mn10200/tm-mn10200.h
@@ -19,9 +19,32 @@ You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+/* The mn10200 is little endian. */
#define TARGET_BYTE_ORDER LITTLE_ENDIAN
-/* 24 bit registers but we'll pretend that they are 32 bits */
+/* ints are only 16bits on the mn10200. */
+#undef TARGET_INT_BIT
+#define TARGET_INT_BIT 16
+
+/* The mn10200 doesn't support long long types. */
+#undef TARGET_LONG_LONG_BIT
+#define TARGET_LONG_LONG_BIT 32
+
+/* The mn10200 doesn't support double or long double either. */
+#undef TARGET_DOUBLE_BIT
+#undef TARGET_LONG_DOUBLE_BIT
+#define TARGET_DOUBLE_BIT 32
+#define TARGET_LONG_DOUBLE_BIT 32
+
+/* Not strictly correct, but the machine independent code is not
+ ready to handle any of the basic sizes not being a power of two. */
+#undef TARGET_PTR_BIT
+#define TARGET_PTR_BIT 32
+
+/* The mn10200 really has 24 bit registers but the simulator reads/writes
+ them as 32bit values, so we claim they're 32bits each. This may have
+ to be tweaked if the Matsushita emulator/board really deals with them
+ as 24bits each. */
#define REGISTER_SIZE 4
#define MAX_REGISTER_RAW_SIZE REGISTER_SIZE
@@ -39,7 +62,8 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#define MDR_REGNUM 9
#define PSW_REGNUM 10
-#define REGISTER_VIRTUAL_TYPE(REG) builtin_type_int
+/* Treat the registers as 32bit values. */
+#define REGISTER_VIRTUAL_TYPE(REG) builtin_type_long
#define REGISTER_BYTE(REG) ((REG) * REGISTER_SIZE)
#define REGISTER_VIRTUAL_SIZE(REG) REGISTER_SIZE
@@ -47,16 +71,25 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#define MAX_REGISTER_VIRTUAL_SIZE REGISTER_SIZE
+/* The breakpoint instruction must be the same size as te smallest
+ instruction in the instruction set.
+
+ The Matsushita mn10x00 processors have single byte instructions
+ so we need a single byte breakpoint. Matsushita hasn't defined
+ one, so we defined it ourselves.
+
+ 0xff is the only available single byte insn left on the mn10200. */
#define BREAKPOINT {0xff}
#define FUNCTION_START_OFFSET 0
#define DECR_PC_AFTER_BREAK 0
+/* Stacks grow the normal way. */
#define INNER_THAN <
#define SAVED_PC_AFTER_CALL(frame) \
- read_memory_integer (read_register (SP_REGNUM), REGISTER_SIZE)
+ (read_memory_integer (read_register (SP_REGNUM), REGISTER_SIZE) & 0xffff)
#ifdef __STDC__
struct frame_info;
@@ -65,38 +98,66 @@ struct type;
struct value;
#endif
-#define EXTRA_FRAME_INFO struct frame_saved_regs fsr;
+#define EXTRA_FRAME_INFO struct frame_saved_regs fsr; int status; int stack_size;
-extern void mn10200_init_extra_frame_info PARAMS ((struct frame_info *fi));
+extern void mn10200_init_extra_frame_info PARAMS ((struct frame_info *));
#define INIT_EXTRA_FRAME_INFO(fromleaf, fi) mn10200_init_extra_frame_info (fi)
-#define INIT_FRAME_PC /* Not necessary */
+#define INIT_FRAME_PC(x,y)
-extern void mn10200_frame_find_saved_regs PARAMS ((struct frame_info *fi, struct frame_saved_regs *regaddr));
+extern void mn10200_frame_find_saved_regs PARAMS ((struct frame_info *,
+ struct frame_saved_regs *));
#define FRAME_FIND_SAVED_REGS(fi, regaddr) regaddr = fi->fsr
-extern CORE_ADDR mn10200_frame_chain PARAMS ((struct frame_info *fi));
+extern CORE_ADDR mn10200_frame_chain PARAMS ((struct frame_info *));
#define FRAME_CHAIN(fi) mn10200_frame_chain (fi)
#define FRAME_CHAIN_VALID(FP, FI) generic_frame_chain_valid (FP, FI)
-extern CORE_ADDR mn10200_find_callers_reg PARAMS ((struct frame_info *fi, int regnum));
+extern CORE_ADDR mn10200_find_callers_reg PARAMS ((struct frame_info *, int));
extern CORE_ADDR mn10200_frame_saved_pc PARAMS ((struct frame_info *));
#define FRAME_SAVED_PC(FI) (mn10200_frame_saved_pc (FI))
/* Extract from an array REGBUF containing the (raw) register state
a function return value of type TYPE, and copy that, in virtual format,
- into VALBUF. */
+ into VALBUF. */
#define EXTRACT_RETURN_VALUE(TYPE, REGBUF, VALBUF) \
- memcpy (VALBUF, REGBUF + REGISTER_BYTE (0), TYPE_LENGTH (TYPE))
+ { \
+ if (TYPE_LENGTH (TYPE) > 4) \
+ abort (); \
+ else if (TYPE_LENGTH (TYPE) > 2 && TYPE_CODE (TYPE) != TYPE_CODE_PTR) \
+ { \
+ memcpy (VALBUF, REGBUF + REGISTER_BYTE (0), 2); \
+ memcpy (VALBUF, REGBUF + REGISTER_BYTE (1), 2); \
+ } \
+ else \
+ { \
+ memcpy (VALBUF, REGBUF + REGISTER_BYTE (0), TYPE_LENGTH (TYPE)); \
+ } \
+ }
#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
extract_address (REGBUF + REGISTER_BYTE (0), \
REGISTER_RAW_SIZE (0))
#define STORE_RETURN_VALUE(TYPE, VALBUF) \
- write_register_bytes(REGISTER_BYTE (0), VALBUF, TYPE_LENGTH (TYPE));
-
-extern CORE_ADDR mn10200_skip_prologue PARAMS ((CORE_ADDR pc));
+ { \
+ if (TYPE_LENGTH (TYPE) > 4) \
+ abort (); \
+ else if (TYPE_LENGTH (TYPE) > 2 && TYPE_CODE (TYPE) != TYPE_CODE_PTR) \
+ { \
+ write_register_bytes (REGISTER_BYTE (0), VALBUF, 2); \
+ write_register_bytes (REGISTER_BYTE (1), VALBUF + 2, 2); \
+ } \
+ else \
+ { \
+ write_register_bytes (REGISTER_BYTE (0), VALBUF, TYPE_LENGTH (TYPE)); \
+ } \
+ }
+
+#define STORE_STRUCT_RETURN(STRUCT_ADDR, SP) write_register (0, STRUCT_ADDR);
+
+
+extern CORE_ADDR mn10200_skip_prologue PARAMS ((CORE_ADDR));
#define SKIP_PROLOGUE(pc) pc = mn10200_skip_prologue (pc)
#define FRAME_ARGS_SKIP 0
@@ -105,7 +166,7 @@ extern CORE_ADDR mn10200_skip_prologue PARAMS ((CORE_ADDR pc));
#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
#define FRAME_NUM_ARGS(val, fi) ((val) = -1)
-extern void mn10200_pop_frame PARAMS ((struct frame_info *frame));
+extern void mn10200_pop_frame PARAMS ((struct frame_info *));
#define POP_FRAME mn10200_pop_frame (get_current_frame ())
#define USE_GENERIC_DUMMY_FRAMES
@@ -123,23 +184,19 @@ extern CORE_ADDR mn10200_push_return_address PARAMS ((CORE_ADDR, CORE_ADDR));
#define PUSH_DUMMY_FRAME generic_push_dummy_frame ()
extern CORE_ADDR
-mn10200_push_arguments PARAMS ((int nargs, struct value **args, CORE_ADDR sp,
- unsigned char struct_return,
- CORE_ADDR struct_addr));
+mn10200_push_arguments PARAMS ((int, struct value **, CORE_ADDR,
+ unsigned char, CORE_ADDR));
#define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \
(SP) = mn10200_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR)
-#define STORE_STRUCT_RETURN(STRUCT_ADDR, SP)
-
#define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP)
#define USE_STRUCT_CONVENTION(GCC_P, TYPE) \
(TYPE_NFIELDS (TYPE) > 1 || TYPE_LENGTH (TYPE) > 4)
-/* override the default get_saved_register function with
- one that takes account of generic CALL_DUMMY frames */
+/* Override the default get_saved_register function with
+ one that takes account of generic CALL_DUMMY frames. */
#define GET_SAVED_REGISTER
/* Define this for Wingdb */
-
#define TARGET_MN10200