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Tue Oct 22 10:25:29 1996 Martin M. Hunt <hunt@pizza.cygnus.com>
* tm-d10v.h: Changes to allow stack backtraces and inferior function calls.
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Martin Hunt
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@ -19,15 +19,12 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* Contributed by Martin Hunt, hunt@cygnus.com */
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#define GDB_TARGET_IS_D10V
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/* Define the bit, byte, and word ordering of the machine. */
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#define TARGET_BYTE_ORDER BIG_ENDIAN
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/* Offset from address of function to start of its code.
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Zero on most machines. */
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@ -40,21 +37,12 @@ extern CORE_ADDR d10v_skip_prologue ();
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#define SKIP_PROLOGUE(ip) \
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{(ip) = d10v_skip_prologue(ip);}
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/* Immediately after a function call, return the saved pc.
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Can't always go through the frames for this because on some machines
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the new frame is not set up until the new function executes
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some instructions.
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The return address is the value saved in the PR register + 4 */
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#define SAVED_PC_AFTER_CALL(frame) (read_register(LR_REGNUM) << 2 )
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/* Stack grows downward. */
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#define INNER_THAN <
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/* for a breakpoint, use "dbt || nop" */
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/* for a breakpoint, use "dbt || nop" */
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#define BREAKPOINT {0x2f, 0x90, 0x5e, 0x00}
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/* If your kernel resets the pc after the trap happens you may need to
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@ -127,13 +115,6 @@ extern CORE_ADDR d10v_skip_prologue ();
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#define STORE_STRUCT_RETURN(ADDR, SP) \
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{ write_register (2, (ADDR)); }
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/* Extract from an array REGBUF containing the (raw) register state
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a function return value of type TYPE, and copy that, in virtual format,
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into VALBUF. */
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#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
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memcpy (VALBUF, (char *)(REGBUF), TYPE_LENGTH(TYPE))
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/* Write into appropriate registers a function return value
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of type TYPE, given in virtual format.
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@ -157,6 +138,7 @@ extern CORE_ADDR d10v_skip_prologue ();
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#define EXTRA_FRAME_INFO \
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CORE_ADDR return_pc; \
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int dummy; \
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int size;
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#define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
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@ -195,25 +177,65 @@ extern CORE_ADDR d10v_skip_prologue ();
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d10v_frame_find_saved_regs(frame_info, &(frame_saved_regs))
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#define NAMES_HAVE_UNDERSCORE
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/*
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DUMMY FRAMES. Need these to support inferior function calls. They work
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like this on D10V: First we set a breakpoint at 0 or __start. Then we push
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all the registers onto the stack. Then put the function arguments in the proper
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registers and set r13 to our breakpoint address. Finally call the function directly.
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When it hits the breakpoint, clear the break point and pop the old register contents
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off the stack.
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*/
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typedef unsigned short INSN_WORD;
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#define CALL_DUMMY { }
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#define PUSH_DUMMY_FRAME
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#define CALL_DUMMY_START_OFFSET 0
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#define CALL_DUMMY_LOCATION AT_ENTRY_POINT
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#define CALL_DUMMY_BREAKPOINT_OFFSET (0)
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#define ADDR_BITS_REMOVE(addr) ((addr))
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extern CORE_ADDR d10v_call_dummy_address PARAMS ((void));
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#define CALL_DUMMY_ADDRESS() d10v_call_dummy_address()
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#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
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d10v_fix_call_dummy (dummyname, pc, fun, nargs, args, type, gcc_p)
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#define PC_IN_CALL_DUMMY(pc, sp, frame_address) \
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((pc>>2) >= CALL_DUMMY_ADDRESS () \
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&& (pc>>2) <= (CALL_DUMMY_ADDRESS () + DECR_PC_AFTER_BREAK))
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#ifdef __STDC__ /* Forward decls for prototypes */
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struct type;
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struct value;
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#endif
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extern void d10v_fix_call_dummy PARAMS ((char *, CORE_ADDR, CORE_ADDR,
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int, struct value **,
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struct type *, int));
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#define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
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sp = d10v_push_arguments((nargs), (args), (sp), (struct_return), (struct_addr))
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extern CORE_ADDR d10v_push_arguments PARAMS ((int, struct value **, CORE_ADDR, int, CORE_ADDR));
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/* Extract from an array REGBUF containing the (raw) register state
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a function return value of type TYPE, and copy that, in virtual format,
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into VALBUF. */
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#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
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d10v_extract_return_value(TYPE, REGBUF, VALBUF)
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extern void
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d10v_extract_return_value PARAMS ((struct type *, char *, char *));
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#define CALL_DUMMY_LENGTH 10
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/* Discard from the stack the innermost frame,
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restoring all saved registers. */
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#define POP_FRAME d10v_pop_frame();
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#define REGISTER_SIZE 2
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# ifdef CC_HAS_LONG_LONG
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# define LONGEST long long
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# else
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# define LONGEST long
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# endif
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#ifdef CC_HAS_LONG_LONG
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# define LONGEST long long
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#else
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# define LONGEST long
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#endif
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void d10v_write_register_pid PARAMS (( int regno, LONGEST val, int pid));
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CORE_ADDR d10v_read_register_pid PARAMS ((int regno, int pid));
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@ -221,7 +243,6 @@ CORE_ADDR d10v_read_register_pid PARAMS ((int regno, int pid));
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#define TARGET_READ_PC(pid) d10v_read_register_pid (PC_REGNUM, pid)
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#define TARGET_WRITE_PC(val,pid) d10v_write_register_pid (PC_REGNUM, val, pid)
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/* Number of bits in the appropriate type */
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#define TARGET_INT_BIT (2 * TARGET_CHAR_BIT)
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#define TARGET_PTR_BIT (2 * TARGET_CHAR_BIT)
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