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Diffstat (limited to 'gdb/config/sparc/tm-sparc.h')
| -rw-r--r-- | gdb/config/sparc/tm-sparc.h | 584 |
1 files changed, 584 insertions, 0 deletions
diff --git a/gdb/config/sparc/tm-sparc.h b/gdb/config/sparc/tm-sparc.h new file mode 100644 index 00000000000..ecbe9e2285d --- /dev/null +++ b/gdb/config/sparc/tm-sparc.h @@ -0,0 +1,584 @@ +/* Target machine sub-parameters for SPARC, for GDB, the GNU debugger. + This is included by other tm-*.h files to define SPARC cpu-related info. + Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994 + Free Software Foundation, Inc. + Contributed by Michael Tiemann (tiemann@mcc.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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#ifdef __STDC__ +struct frame_info; +struct type; +struct value; +#endif + +#define TARGET_BYTE_ORDER BIG_ENDIAN + +/* Floating point is IEEE compatible. */ +#define IEEE_FLOAT + +/* If an argument is declared "register", Sun cc will keep it in a register, + never saving it onto the stack. So we better not believe the "p" symbol + descriptor stab. */ + +#define USE_REGISTER_NOT_ARG + +/* When passing a structure to a function, Sun cc passes the address + not the structure itself. It (under SunOS4) creates two symbols, + which we need to combine to a LOC_REGPARM. Gcc version two (as of + 1.92) behaves like sun cc. REG_STRUCT_HAS_ADDR is smart enough to + distinguish between Sun cc, gcc version 1 and gcc version 2. */ + +#define REG_STRUCT_HAS_ADDR(gcc_p,type) (gcc_p != 1) + +/* Sun /bin/cc gets this right as of SunOS 4.1.x. We need to define + BELIEVE_PCC_PROMOTION to get this right now that the code which + detects gcc2_compiled. is broken. This loses for SunOS 4.0.x and + earlier. */ + +#define BELIEVE_PCC_PROMOTION 1 + +/* For acc, there's no need to correct LBRAC entries by guessing how + they should work. In fact, this is harmful because the LBRAC + entries now all appear at the end of the function, not intermixed + with the SLINE entries. n_opt_found detects acc for Solaris binaries; + function_stab_type detects acc for SunOS4 binaries. + + For binary from SunOS4 /bin/cc, need to correct LBRAC's. + + For gcc, like acc, don't correct. */ + +#define SUN_FIXED_LBRAC_BUG \ + (n_opt_found \ + || function_stab_type == N_STSYM \ + || function_stab_type == N_GSYM \ + || processing_gcc_compilation) + +/* Do variables in the debug stabs occur after the N_LBRAC or before it? + acc: after, gcc: before, SunOS4 /bin/cc: before. */ + +#define VARIABLES_INSIDE_BLOCK(desc, gcc_p) \ + (!(gcc_p) \ + && (n_opt_found \ + || function_stab_type == N_STSYM \ + || function_stab_type == N_GSYM)) + +/* Offset from address of function to start of its code. + Zero on most machines. */ + +#define FUNCTION_START_OFFSET 0 + +/* Advance PC across any function entry prologue instructions + to reach some "real" code. SKIP_PROLOGUE_FRAMELESS_P advances + the PC past some of the prologue, but stops as soon as it + knows that the function has a frame. Its result is equal + to its input PC if the function is frameless, unequal otherwise. */ + +#define SKIP_PROLOGUE(pc) \ + { pc = skip_prologue (pc, 0); } +#define SKIP_PROLOGUE_FRAMELESS_P(pc) \ + { pc = skip_prologue (pc, 1); } +extern CORE_ADDR skip_prologue PARAMS ((CORE_ADDR, int)); + +/* Immediately after a function call, return the saved pc. + Can't go through the frames for this because on some machines + the new frame is not set up until the new function executes + some instructions. */ + +/* On the Sun 4 under SunOS, the compile will leave a fake insn which + encodes the structure size being returned. If we detect such + a fake insn, step past it. */ + +#define PC_ADJUST(pc) sparc_pc_adjust(pc) +extern CORE_ADDR sparc_pc_adjust PARAMS ((CORE_ADDR)); + +#define SAVED_PC_AFTER_CALL(frame) PC_ADJUST (read_register (RP_REGNUM)) + +/* Stack grows downward. */ + +#define INNER_THAN(lhs,rhs) ((lhs) < (rhs)) + +/* Stack must be aligned on 64-bit boundaries when synthesizing + function calls. */ + +#define STACK_ALIGN(ADDR) (((ADDR) + 7) & -8) + +/* Sequence of bytes for breakpoint instruction (ta 1). */ + +#define BREAKPOINT {0x91, 0xd0, 0x20, 0x01} + +/* 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 + +/* Say how long (ordinary) registers are. This is a piece of bogosity + used in push_word and a few other places; REGISTER_RAW_SIZE is the + real way to know how big a register is. */ + +#define REGISTER_SIZE 4 + +/* Number of machine registers */ + +#define NUM_REGS 72 + +/* Initializer for an array of names of registers. + There should be NUM_REGS strings in this initializer. */ + +#define REGISTER_NAMES \ +{ "g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7", \ + "o0", "o1", "o2", "o3", "o4", "o5", "sp", "o7", \ + "l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7", \ + "i0", "i1", "i2", "i3", "i4", "i5", "fp", "i7", \ + \ + "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \ + "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \ + "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \ + "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \ + \ + "y", "psr", "wim", "tbr", "pc", "npc", "fpsr", "cpsr" } + +/* 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 G0_REGNUM 0 /* %g0 */ +#define G1_REGNUM 1 /* %g1 */ +#define O0_REGNUM 8 /* %o0 */ +#define SP_REGNUM 14 /* Contains address of top of stack, \ + which is also the bottom of the frame. */ +#define RP_REGNUM 15 /* Contains return address value, *before* \ + any windows get switched. */ +#define O7_REGNUM 15 /* Last local reg not saved on stack frame */ +#define L0_REGNUM 16 /* First local reg that's saved on stack frame + rather than in machine registers */ +#define I0_REGNUM 24 /* %i0 */ +#define FP_REGNUM 30 /* Contains address of executing stack frame */ +#define I7_REGNUM 31 /* Last local reg saved on stack frame */ +#define FP0_REGNUM 32 /* Floating point register 0 */ +#define Y_REGNUM 64 /* Temp register for multiplication, etc. */ +#define PS_REGNUM 65 /* Contains processor status */ +#define PS_FLAG_CARRY 0x100000 /* Carry bit in PS */ +#define WIM_REGNUM 66 /* Window Invalid Mask (not really supported) */ +#define TBR_REGNUM 67 /* Trap Base Register (not really supported) */ +#define PC_REGNUM 68 /* Contains program counter */ +#define NPC_REGNUM 69 /* Contains next PC */ +#define FPS_REGNUM 70 /* Floating point status register */ +#define CPS_REGNUM 71 /* Coprocessor status register */ + +/* Total amount of space needed to store our copies of the machine's + register state, the array `registers'. On the sparc, `registers' + contains the ins and locals, even though they are saved on the + stack rather than with the other registers, and this causes hair + and confusion in places like pop_frame. It might be + better to remove the ins and locals from `registers', make sure + that get_saved_register can get them from the stack (even in the + innermost frame), and make this the way to access them. For the + frame pointer we would do that via TARGET_READ_FP. On the other hand, + that is likely to be confusing or worse for flat frames. */ + +#define REGISTER_BYTES (32*4+32*4+8*4) + +/* Index within `registers' of the first byte of the space for + register N. */ +/* ?? */ +#define REGISTER_BYTE(N) ((N)*4) + +/* We need to override GET_SAVED_REGISTER so that we can deal with the way + outs change into ins in different frames. HAVE_REGISTER_WINDOWS can't + deal with this case and also handle flat frames at the same time. */ + +#define GET_SAVED_REGISTER 1 + +/* Number of bytes of storage in the actual machine representation + for register N. */ + +/* On the SPARC, all regs are 4 bytes. */ + +#define REGISTER_RAW_SIZE(N) (4) + +/* Number of bytes of storage in the program's representation + for register N. */ + +/* On the SPARC, all regs are 4 bytes. */ + +#define REGISTER_VIRTUAL_SIZE(N) (4) + +/* Largest value REGISTER_RAW_SIZE can have. */ + +#define MAX_REGISTER_RAW_SIZE 8 + +/* Largest value REGISTER_VIRTUAL_SIZE can have. */ + +#define MAX_REGISTER_VIRTUAL_SIZE 8 + +/* Return the GDB type object for the "standard" data type + of data in register N. */ + +#define REGISTER_VIRTUAL_TYPE(N) \ + ((N) < 32 ? builtin_type_int : (N) < 64 ? builtin_type_float : \ + builtin_type_int) + +/* Writing to %g0 is a noop (not an error or exception or anything like + that, however). */ + +#define CANNOT_STORE_REGISTER(regno) ((regno) == G0_REGNUM) + +/* Store the address of the place in which to copy the structure the + subroutine will return. This is called from call_function_by_hand. + The ultimate mystery is, tho, what is the value "16"? */ + +#define STORE_STRUCT_RETURN(ADDR, SP) \ + { char val[4]; \ + store_unsigned_integer (val, 4, (ADDR)); \ + write_memory ((SP)+(16*4), val, 4); } + +/* 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. */ + +#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ + sparc_extract_return_value(TYPE, REGBUF, VALBUF) +extern void +sparc_extract_return_value PARAMS ((struct type *, char [], char *)); + +/* Write into appropriate registers a function return value + of type TYPE, given in virtual format. */ +#define STORE_RETURN_VALUE(TYPE,VALBUF) \ + sparc_store_return_value(TYPE, VALBUF) +extern void sparc_store_return_value PARAMS ((struct type *, char *)); + +/* Extract from an array REGBUF containing the (raw) register state + the address in which a function should return its structure value, + as a CORE_ADDR (or an expression that can be used as one). */ + +#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \ + (sparc_extract_struct_value_address (REGBUF)) + +extern CORE_ADDR +sparc_extract_struct_value_address PARAMS ((char [REGISTER_BYTES])); + + +/* Describe the pointer in each stack frame to the previous stack frame + (its caller). */ + +/* FRAME_CHAIN takes a frame's nominal address + and produces the frame's chain-pointer. */ + +/* In the case of the Sun 4, the frame-chain's nominal address + is held in the frame pointer register. + + On the Sun4, the frame (in %fp) is %sp for the previous frame. + From the previous frame's %sp, we can find the previous frame's + %fp: it is in the save area just above the previous frame's %sp. + + If we are setting up an arbitrary frame, we'll need to know where + it ends. Hence the following. This part of the frame cache + structure should be checked before it is assumed that this frame's + bottom is in the stack pointer. + + If there isn't a frame below this one, the bottom of this frame is + in the stack pointer. + + If there is a frame below this one, and the frame pointers are + identical, it's a leaf frame and the bottoms are the same also. + + Otherwise the bottom of this frame is the top of the next frame. + + The bottom field is misnamed, since it might imply that memory from + bottom to frame contains this frame. That need not be true if + stack frames are allocated in different segments (e.g. some on a + stack, some on a heap in the data segment). + + GCC 2.6 and later can generate ``flat register window'' code that + makes frames by explicitly saving those registers that need to be + saved. %i7 is used as the frame pointer, and the frame is laid out so + that flat and non-flat calls can be intermixed freely within a + program. Unfortunately for GDB, this means it must detect and record + the flatness of frames. + + Since the prologue in a flat frame also tells us where fp and pc + have been stashed (the frame is of variable size, so their location + is not fixed), it's convenient to record them in the frame info. */ + +#define EXTRA_FRAME_INFO \ + CORE_ADDR bottom; \ + int in_prologue; \ + int flat; \ + /* Following fields only relevant for flat frames. */ \ + CORE_ADDR pc_addr; \ + CORE_ADDR fp_addr; \ + /* Add this to ->frame to get the value of the stack pointer at the */ \ + /* time of the register saves. */ \ + int sp_offset; + +#define FRAME_INIT_SAVED_REGS(fp) /*no-op*/ + +#define INIT_EXTRA_FRAME_INFO(fromleaf, fci) \ + sparc_init_extra_frame_info (fromleaf, fci) +extern void sparc_init_extra_frame_info PARAMS((int, struct frame_info *)); + +#define PRINT_EXTRA_FRAME_INFO(fi) \ + { \ + if ((fi) && (fi)->flat) \ + printf_filtered (" flat, pc saved at 0x%x, fp saved at 0x%x\n", \ + (fi)->pc_addr, (fi)->fp_addr); \ + } + +#define FRAME_CHAIN(thisframe) (sparc_frame_chain (thisframe)) +extern CORE_ADDR sparc_frame_chain PARAMS ((struct frame_info *)); + +/* INIT_EXTRA_FRAME_INFO needs the PC to detect flat frames. */ + +#define INIT_FRAME_PC(fromleaf, prev) /* nothing */ +#define INIT_FRAME_PC_FIRST(fromleaf, prev) \ + (prev)->pc = ((fromleaf) ? SAVED_PC_AFTER_CALL ((prev)->next) : \ + (prev)->next ? FRAME_SAVED_PC ((prev)->next) : read_pc ()); + +/* Define other aspects of the stack frame. */ + +/* 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. */ +#define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \ + (FRAMELESS) = frameless_look_for_prologue(FI) + +/* The location of I0 w.r.t SP. This is actually dependent on how the system's + window overflow/underflow routines are written. Most vendors save the L regs + followed by the I regs (at the higher address). Some vendors get it wrong. + */ + +#define FRAME_SAVED_L0 0 +#define FRAME_SAVED_I0 (8 * REGISTER_RAW_SIZE (L0_REGNUM)) + +/* Where is the PC for a specific frame */ + +#define FRAME_SAVED_PC(FRAME) sparc_frame_saved_pc (FRAME) +extern CORE_ADDR sparc_frame_saved_pc PARAMS ((struct frame_info *)); + +/* If the argument is on the stack, it will be here. */ +#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame) + +#define FRAME_STRUCT_ARGS_ADDRESS(fi) ((fi)->frame) + +#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame) + +/* Set VAL to the number of args passed to frame described by FI. + Can set VAL to -1, meaning no way to tell. */ + +/* We can't tell how many args there are + now that the C compiler delays popping them. */ +#define FRAME_NUM_ARGS(val,fi) (val = -1) + +/* Return number of bytes at start of arglist that are not really args. */ + +#define FRAME_ARGS_SKIP 68 + +/* Things needed for making the inferior call functions. */ +/* + * First of all, let me give my opinion of what the DUMMY_FRAME + * actually looks like. + * + * | | + * | | + * + - - - - - - - - - - - - - - - - +<-- fp (level 0) + * | | + * | | + * | | + * | | + * | Frame of innermost program | + * | function | + * | | + * | | + * | | + * | | + * | | + * |---------------------------------|<-- sp (level 0), fp (c) + * | | + * DUMMY | fp0-31 | + * | | + * | ------ |<-- fp - 0x80 + * FRAME | g0-7 |<-- fp - 0xa0 + * | i0-7 |<-- fp - 0xc0 + * | other |<-- fp - 0xe0 + * | ? | + * | ? | + * |---------------------------------|<-- sp' = fp - 0x140 + * | | + * xcution start | | + * sp' + 0x94 -->| CALL_DUMMY (x code) | + * | | + * | | + * |---------------------------------|<-- sp'' = fp - 0x200 + * | align sp to 8 byte boundary | + * | ==> args to fn <== | + * Room for | | + * i & l's + agg | CALL_DUMMY_STACK_ADJUST = 0x0x44| + * |---------------------------------|<-- final sp (variable) + * | | + * | Where function called will | + * | build frame. | + * | | + * | | + * + * I understand everything in this picture except what the space + * between fp - 0xe0 and fp - 0x140 is used for. Oh, and I don't + * understand why there's a large chunk of CALL_DUMMY that never gets + * executed (its function is superceeded by PUSH_DUMMY_FRAME; they + * are designed to do the same thing). + * + * PUSH_DUMMY_FRAME saves the registers above sp' and pushes the + * register file stack down one. + * + * call_function then writes CALL_DUMMY, pushes the args onto the + * stack, and adjusts the stack pointer. + * + * run_stack_dummy then starts execution (in the middle of + * CALL_DUMMY, as directed by call_function). + */ + +/* Push an empty stack frame, to record the current PC, etc. */ + +#define PUSH_DUMMY_FRAME sparc_push_dummy_frame () +#define POP_FRAME sparc_pop_frame () + +void sparc_push_dummy_frame PARAMS ((void)), sparc_pop_frame PARAMS ((void)); + +#ifndef CALL_DUMMY +/* This sequence of words is the instructions + + 0: bc 10 00 01 mov %g1, %fp + 4: 9d e3 80 00 save %sp, %g0, %sp + 8: bc 10 00 02 mov %g2, %fp + c: be 10 00 03 mov %g3, %i7 + 10: da 03 a0 58 ld [ %sp + 0x58 ], %o5 + 14: d8 03 a0 54 ld [ %sp + 0x54 ], %o4 + 18: d6 03 a0 50 ld [ %sp + 0x50 ], %o3 + 1c: d4 03 a0 4c ld [ %sp + 0x4c ], %o2 + 20: d2 03 a0 48 ld [ %sp + 0x48 ], %o1 + 24: 40 00 00 00 call <fun> + 28: d0 03 a0 44 ld [ %sp + 0x44 ], %o0 + 2c: 01 00 00 00 nop + 30: 91 d0 20 01 ta 1 + 34: 01 00 00 00 nop + + NOTES: + * the first four instructions are necessary only on the simulator. + * this is a multiple of 8 (not only 4) bytes. + * the `call' insn is a relative, not an absolute call. + * the `nop' at the end is needed to keep the trap from + clobbering things (if NPC pointed to garbage instead). +*/ + +#define CALL_DUMMY { 0xbc100001, 0x9de38000, 0xbc100002, 0xbe100003, \ + 0xda03a058, 0xd803a054, 0xd603a050, 0xd403a04c, \ + 0xd203a048, 0x40000000, 0xd003a044, 0x01000000, \ + 0x91d02001, 0x01000000 } + + +/* Size of the call dummy in bytes. */ + +#define CALL_DUMMY_LENGTH 0x38 + +/* Offset within call dummy of first instruction to execute. */ + +#define CALL_DUMMY_START_OFFSET 0 + +/* Offset within CALL_DUMMY of the 'call' instruction. */ + +#define CALL_DUMMY_CALL_OFFSET (CALL_DUMMY_START_OFFSET + 0x24) + +/* Offset within CALL_DUMMY of the 'ta 1' instruction. */ + +#define CALL_DUMMY_BREAKPOINT_OFFSET (CALL_DUMMY_START_OFFSET + 0x30) + +#define CALL_DUMMY_STACK_ADJUST 68 + +#endif +/* Insert the specified number of args and function address + into a call sequence of the above form stored at DUMMYNAME. */ + +#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \ + sparc_fix_call_dummy (dummyname, pc, fun, type, gcc_p) +void sparc_fix_call_dummy PARAMS ((char *dummy, CORE_ADDR pc, CORE_ADDR fun, + struct type *value_type, int using_gcc)); + +/* The Sparc returns long doubles on the stack. */ + +#define RETURN_VALUE_ON_STACK(TYPE) \ + (TYPE_CODE(TYPE) == TYPE_CODE_FLT \ + && TYPE_LENGTH(TYPE) > 8) + +/* Sparc has no reliable single step ptrace call */ + +#define SOFTWARE_SINGLE_STEP_P 1 +extern void sparc_software_single_step PARAMS ((unsigned int, int)); +#define SOFTWARE_SINGLE_STEP(sig,bp_p) sparc_software_single_step (sig,bp_p) + +/* We need more arguments in a frame specification for the + "frame" or "info frame" command. */ + +#define SETUP_ARBITRARY_FRAME(argc, argv) setup_arbitrary_frame (argc, argv) +extern struct frame_info *setup_arbitrary_frame PARAMS ((int, CORE_ADDR *)); + +/* To print every pair of float registers as a double, we use this hook. + We also print the condition code registers in a readable format + (FIXME: can expand this to all control regs). */ + +#undef PRINT_REGISTER_HOOK +#define PRINT_REGISTER_HOOK(regno) \ + sparc_print_register_hook (regno) +extern void sparc_print_register_hook PARAMS ((int regno)); + + +/* Optimization for storing registers to the inferior. The hook + DO_DEFERRED_STORES + actually executes any deferred stores. It is called any time + we are going to proceed the child, or read its registers. + The hook CLEAR_DEFERRED_STORES is called when we want to throw + away the inferior process, e.g. when it dies or we kill it. + FIXME, this does not handle remote debugging cleanly. */ + +extern int deferred_stores; +#define DO_DEFERRED_STORES \ + if (deferred_stores) \ + target_store_registers (-2); +#define CLEAR_DEFERRED_STORES \ + deferred_stores = 0; + +/* If the current gcc for for this target does not produce correct debugging + information for float parameters, both prototyped and unprototyped, then + define this macro. This forces gdb to always assume that floats are + passed as doubles and then converted in the callee. */ + +#define COERCE_FLOAT_TO_DOUBLE 1 + +/* Select the sparc disassembler */ + +#define TM_PRINT_INSN_MACH bfd_mach_sparc + +/* Arguments smaller than an int must promoted to ints when synthesizing + function calls. */ + +#define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \ + sp = sparc_push_arguments((nargs), (args), (sp), (struct_return), (struct_addr)) +extern CORE_ADDR +sparc_push_arguments PARAMS ((int, struct value **, CORE_ADDR, int, CORE_ADDR)); |