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- /* Target machine definitions for GDB on a Sequent Symmetry under dynix 3.0,
- with Weitek 1167 and i387 support.
- Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994
- Free Software Foundation, Inc.
- Symmetry version by Jay Vosburgh (fubar@sequent.com).
-
- This file is part of GDB.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* I don't know if this will work for cross-debugging, even if you do get
- a copy of the right include file. */
- #include <machine/reg.h>
-
- #define START_INFERIOR_TRAPS_EXPECTED 2
-
- /* Amount PC must be decremented by after a breakpoint.
- This is often the number of bytes in BREAKPOINT
- but not always. */
-
- #define DECR_PC_AFTER_BREAK 0
-
- #include "i386/tm-i386v.h"
-
- #if 0
- /* --- this code can't be used unless we know we are running native,
- since it uses host specific ptrace calls. */
- /* code for 80387 fpu. Functions are from i386-dep.c, copied into
- * symm-dep.c.
- */
- #define FLOAT_INFO { i386_float_info(); }
- #endif
-
- /* Number of machine registers */
- #undef NUM_REGS
- #define NUM_REGS 49
-
- /* Initializer for an array of names of registers.
- There should be NUM_REGS strings in this initializer. */
-
- /* Symmetry registers are in this weird order to match the register
- numbers in the symbol table entries. If you change the order,
- things will probably break mysteriously for no apparent reason.
- Also note that the st(0)...st(7) 387 registers are represented as
- st0...st7. */
-
- #undef REGISTER_NAMES
- #define REGISTER_NAMES { "eax", "edx", "ecx", "st0", "st1", \
- "ebx", "esi", "edi", "st2", "st3", \
- "st4", "st5", "st6", "st7", "esp", \
- "ebp", "eip", "eflags", "fp1", "fp2", \
- "fp3", "fp4", "fp5", "fp6", "fp7", \
- "fp8", "fp9", "fp10", "fp11", "fp12", \
- "fp13", "fp14", "fp15", "fp16", "fp17", \
- "fp18", "fp19", "fp20", "fp21", "fp22", \
- "fp23", "fp24", "fp25", "fp26", "fp27", \
- "fp28", "fp29", "fp30", "fp31" }
-
- /* Register numbers of various important registers.
- Note that some of these values are "real" register numbers,
- and correspond to the general registers of the machine,
- and some are "phony" register numbers which are too large
- to be actual register numbers as far as the user is concerned
- but do serve to get the desired values when passed to read_register. */
-
- #define EAX_REGNUM 0
- #define EDX_REGNUM 1
- #define ECX_REGNUM 2
- #define ST0_REGNUM 3
- #define ST1_REGNUM 4
- #define EBX_REGNUM 5
- #define ESI_REGNUM 6
- #define EDI_REGNUM 7
- #define ST2_REGNUM 8
- #define ST3_REGNUM 9
-
- #define ST4_REGNUM 10
- #define ST5_REGNUM 11
- #define ST6_REGNUM 12
- #define ST7_REGNUM 13
-
- #define FP1_REGNUM 18 /* first 1167 register */
- /* Get %fp2 - %fp31 by addition, since they are contiguous */
-
- #undef SP_REGNUM
- #define SP_REGNUM 14 /* esp--Contains address of top of stack */
- #define ESP_REGNUM 14
- #undef FP_REGNUM
- #define FP_REGNUM 15 /* ebp--Contains address of executing stack frame */
- #define EBP_REGNUM 15
- #undef PC_REGNUM
- #define PC_REGNUM 16 /* eip--Contains program counter */
- #define EIP_REGNUM 16
- #undef PS_REGNUM
- #define PS_REGNUM 17 /* eflags--Contains processor status */
- #define EFLAGS_REGNUM 17
-
- /*
- * Following macro translates i386 opcode register numbers to Symmetry
- * register numbers. This is used by i386_frame_find_saved_regs.
- *
- * %eax %ecx %edx %ebx %esp %ebp %esi %edi
- * i386 0 1 2 3 4 5 6 7
- * Symmetry 0 2 1 5 14 15 6 7
- *
- */
- #define I386_REGNO_TO_SYMMETRY(n) \
- ((n)==0?0 :(n)==1?2 :(n)==2?1 :(n)==3?5 :(n)==4?14 :(n)==5?15 :(n))
-
- /* The magic numbers below are offsets into u_ar0 in the user struct.
- * They live in <machine/reg.h>. Gdb calls this macro with blockend
- * holding u.u_ar0 - KERNEL_U_ADDR. Only the registers listed are
- * saved in the u area (along with a few others that aren't useful
- * here. See <machine/reg.h>).
- */
-
- #define REGISTER_U_ADDR(addr, blockend, regno) \
- { struct user foo; /* needed for finding fpu regs */ \
- switch (regno) { \
- case 0: \
- addr = blockend + EAX * sizeof(int); break; \
- case 1: \
- addr = blockend + EDX * sizeof(int); break; \
- case 2: \
- addr = blockend + ECX * sizeof(int); break; \
- case 3: /* st(0) */ \
- addr = ((int)&foo.u_fpusave.fpu_stack[0][0] - (int)&foo); \
- break; \
- case 4: /* st(1) */ \
- addr = ((int) &foo.u_fpusave.fpu_stack[1][0] - (int)&foo); \
- break; \
- case 5: \
- addr = blockend + EBX * sizeof(int); break; \
- case 6: \
- addr = blockend + ESI * sizeof(int); break; \
- case 7: \
- addr = blockend + EDI * sizeof(int); break; \
- case 8: /* st(2) */ \
- addr = ((int) &foo.u_fpusave.fpu_stack[2][0] - (int)&foo); \
- break; \
- case 9: /* st(3) */ \
- addr = ((int) &foo.u_fpusave.fpu_stack[3][0] - (int)&foo); \
- break; \
- case 10: /* st(4) */ \
- addr = ((int) &foo.u_fpusave.fpu_stack[4][0] - (int)&foo); \
- break; \
- case 11: /* st(5) */ \
- addr = ((int) &foo.u_fpusave.fpu_stack[5][0] - (int)&foo); \
- break; \
- case 12: /* st(6) */ \
- addr = ((int) &foo.u_fpusave.fpu_stack[6][0] - (int)&foo); \
- break; \
- case 13: /* st(7) */ \
- addr = ((int) &foo.u_fpusave.fpu_stack[7][0] - (int)&foo); \
- break; \
- case 14: \
- addr = blockend + ESP * sizeof(int); break; \
- case 15: \
- addr = blockend + EBP * sizeof(int); break; \
- case 16: \
- addr = blockend + EIP * sizeof(int); break; \
- case 17: \
- addr = blockend + FLAGS * sizeof(int); break; \
- case 18: /* fp1 */ \
- case 19: /* fp2 */ \
- case 20: /* fp3 */ \
- case 21: /* fp4 */ \
- case 22: /* fp5 */ \
- case 23: /* fp6 */ \
- case 24: /* fp7 */ \
- case 25: /* fp8 */ \
- case 26: /* fp9 */ \
- case 27: /* fp10 */ \
- case 28: /* fp11 */ \
- case 29: /* fp12 */ \
- case 30: /* fp13 */ \
- case 31: /* fp14 */ \
- case 32: /* fp15 */ \
- case 33: /* fp16 */ \
- case 34: /* fp17 */ \
- case 35: /* fp18 */ \
- case 36: /* fp19 */ \
- case 37: /* fp20 */ \
- case 38: /* fp21 */ \
- case 39: /* fp22 */ \
- case 40: /* fp23 */ \
- case 41: /* fp24 */ \
- case 42: /* fp25 */ \
- case 43: /* fp26 */ \
- case 44: /* fp27 */ \
- case 45: /* fp28 */ \
- case 46: /* fp29 */ \
- case 47: /* fp30 */ \
- case 48: /* fp31 */ \
- addr = ((int) &foo.u_fpasave.fpa_regs[(regno)-18] - (int)&foo); \
- } \
- }
-
- /* Total amount of space needed to store our copies of the machine's
- register state, the array `registers'. */
- /* 10 i386 registers, 8 i387 registers, and 31 Weitek 1167 registers */
- #undef REGISTER_BYTES
- #define REGISTER_BYTES ((10 * 4) + (8 * 10) + (31 * 4))
-
- /* Index within `registers' of the first byte of the space for
- register N. */
-
- #undef REGISTER_BYTE
- #define REGISTER_BYTE(N) \
- ((N < 3) ? (N * 4) : \
- (N < 5) ? (((N - 2) * 10) + 2) : \
- (N < 8) ? (((N - 5) * 4) + 32) : \
- (N < 14) ? (((N - 8) * 10) + 44) : \
- (((N - 14) * 4) + 104))
-
- /* Number of bytes of storage in the actual machine representation
- * for register N. All registers are 4 bytes, except 387 st(0) - st(7),
- * which are 80 bits each.
- */
-
- #undef REGISTER_RAW_SIZE
- #define REGISTER_RAW_SIZE(N) \
- ((N < 3) ? 4 : \
- (N < 5) ? 10 : \
- (N < 8) ? 4 : \
- (N < 14) ? 10 : \
- 4)
-
- /* Largest value REGISTER_RAW_SIZE can have. */
-
- #undef MAX_REGISTER_RAW_SIZE
- #define MAX_REGISTER_RAW_SIZE 10
-
- /* Nonzero if register N requires conversion
- from raw format to virtual format. */
-
- #undef REGISTER_CONVERTIBLE
- #define REGISTER_CONVERTIBLE(N) \
- ((N < 3) ? 0 : \
- (N < 5) ? 1 : \
- (N < 8) ? 0 : \
- (N < 14) ? 1 : \
- 0)
-
- #include "floatformat.h"
-
- /* Convert data from raw format for register REGNUM in buffer FROM
- to virtual format with type TYPE in buffer TO. */
-
- #undef REGISTER_CONVERT_TO_VIRTUAL
- #define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \
- { \
- double val; \
- floatformat_to_double (&floatformat_i387_ext, (FROM), &val); \
- store_floating ((TO), TYPE_LENGTH (TYPE), val); \
- }
-
- /* Convert data from virtual format with type TYPE in buffer FROM
- to raw format for register REGNUM in buffer TO. */
-
- #undef REGISTER_CONVERT_TO_RAW
- #define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \
- { \
- double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \
- floatformat_from_double (&floatformat_i387_ext, &val, (TO)); \
- }
-
- /* Return the GDB type object for the "standard" data type
- of data in register N. */
-
- #undef REGISTER_VIRTUAL_TYPE
- #define REGISTER_VIRTUAL_TYPE(N) \
- ((N < 3) ? builtin_type_int : \
- (N < 5) ? builtin_type_double : \
- (N < 8) ? builtin_type_int : \
- (N < 14) ? builtin_type_double : \
- builtin_type_int)
-
- /* Store the address of the place in which to copy the structure the
- subroutine will return. This is called from call_function.
- Native cc passes the address in eax, gcc (up to version 2.5.8)
- passes it on the stack. gcc should be fixed in future versions to
- adopt native cc conventions. */
-
- #undef STORE_STRUCT_RETURN
- #define STORE_STRUCT_RETURN(ADDR, SP) write_register(0, (ADDR))
-
- /* 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. */
-
- #undef EXTRACT_RETURN_VALUE
- #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
- symmetry_extract_return_value(TYPE, REGBUF, VALBUF)
-
-
- extern void
- print_387_control_word PARAMS ((unsigned int));
-
- extern void
- print_387_status_word PARAMS ((unsigned int));
-
- /* The following redefines make backtracing through sigtramp work.
- They manufacture a fake sigtramp frame and obtain the saved pc in sigtramp
- from the sigcontext structure which is pushed by the kernel on the
- user stack, along with a pointer to it. */
-
- #define IN_SIGTRAMP(pc, name) ((name) && STREQ ("_sigcode", name))
-
- /* Offset to saved PC in sigcontext, from <signal.h>. */
- #define SIGCONTEXT_PC_OFFSET 16
-
- /* FRAME_CHAIN takes a frame's nominal address and produces the frame's
- chain-pointer.
- In the case of the i386, the frame's nominal address
- is the address of a 4-byte word containing the calling frame's address. */
- #undef FRAME_CHAIN
- #define FRAME_CHAIN(thisframe) \
- (thisframe->signal_handler_caller \
- ? thisframe->frame \
- : (!inside_entry_file ((thisframe)->pc) \
- ? read_memory_integer ((thisframe)->frame, 4) \
- : 0))
-
- /* A macro that tells us whether the function invocation represented
- by FI does not have a frame on the stack associated with it. If it
- does not, FRAMELESS is set to 1, else 0. */
- #undef FRAMELESS_FUNCTION_INVOCATION
- #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
- do { \
- if ((FI)->signal_handler_caller) \
- (FRAMELESS) = 0; \
- else \
- (FRAMELESS) = frameless_look_for_prologue(FI); \
- } while (0)
-
- /* Saved Pc. Get it from sigcontext if within sigtramp. */
-
- #undef FRAME_SAVED_PC
- #define FRAME_SAVED_PC(FRAME) \
- (((FRAME)->signal_handler_caller \
- ? sigtramp_saved_pc (FRAME) \
- : read_memory_integer ((FRAME)->frame + 4, 4)) \
- )
-