diff options
Diffstat (limited to 'gdb/m-sun4.h')
| -rw-r--r-- | gdb/m-sun4.h | 493 |
1 files changed, 493 insertions, 0 deletions
diff --git a/gdb/m-sun4.h b/gdb/m-sun4.h new file mode 100644 index 0000000..255cb56 --- /dev/null +++ b/gdb/m-sun4.h @@ -0,0 +1,493 @@ +/* Parameters for execution on a Sun 4, for GDB, the GNU debugger. + Copyright (C) 1986, 1987 Free Software Foundation, Inc. + Contributed by Michael Tiemann (tiemann@mcc.com) + +GDB is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY. No author or distributor accepts responsibility to anyone +for the consequences of using it or for whether it serves any +particular purpose or works at all, unless he says so in writing. +Refer to the GDB General Public License for full details. + +Everyone is granted permission to copy, modify and redistribute GDB, +but only under the conditions described in the GDB General Public +License. A copy of this license is supposed to have been given to you +along with GDB so you can know your rights and responsibilities. It +should be in a file named COPYING. Among other things, the copyright +notice and this notice must be preserved on all copies. + +In other words, go ahead and share GDB, but don't try to stop +anyone else from sharing it farther. Help stamp out software hoarding! +*/ + +#ifndef sun4 +#define sun4 +#endif + +/* Get rid of any system-imposed stack limit if possible. */ + +#define SET_STACK_LIMIT_HUGE + +/* Define this if the C compiler puts an underscore at the front + of external names before giving them to the linker. */ + +#define NAMES_HAVE_UNDERSCORE + +/* Debugger information will be in DBX format. */ + +#define READ_DBX_FORMAT + +/* 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. */ + +#define SKIP_PROLOGUE(pc) \ + { pc = skip_prologue (pc); } + +/* 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) ((read_memory_integer (pc + 8, 4) & 0xfffffe00) == 0 ? pc+12 : pc+8) + +#define SAVED_PC_AFTER_CALL(frame) PC_ADJUST (read_register (RP_REGNUM)) + +/* Address of end of stack space. */ + +#define STACK_END_ADDR 0xf000000 + +/* Stack grows downward. */ + +#define INNER_THAN < + +/* Stack has strict alignment. */ + +#define STACK_ALIGN(ADDR) (((ADDR)+7)&-8) + +/* Sequence of bytes for breakpoint instruction. */ + +#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 + +/* Nonzero if instruction at PC is a return instruction. */ +/* For SPARC, this is either a "jmpl %o7+8,%g0" or "jmpl %i7+8,%g0". + + Note: this does not work for functions returning structures under SunOS. */ +#define ABOUT_TO_RETURN(pc) \ + ((read_memory_integer (pc, 4)|0x00040000) == 0x81c7e008) + +/* Return 1 if P points to an invalid floating point value. */ + +#define INVALID_FLOAT(p, len) 0 /* Just a first guess; not checked */ + +/* Say how long (ordinary) registers are. */ + +#define REGISTER_TYPE long + +/* 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 FP_REGNUM 30 /* Contains address of executing stack frame */ +#define RP_REGNUM 15 /* Contains return address value, *before* \ + any windows get switched. */ +#define SP_REGNUM 14 /* Contains address of top of stack, \ + which is also the bottom of the frame. */ +#define Y_REGNUM 64 /* Temp register for multiplication, etc. */ +#define PS_REGNUM 65 /* Contains processor status */ +#define PC_REGNUM 68 /* Contains program counter */ +#define NPC_REGNUM 69 /* Contains next PC */ +#define FP0_REGNUM 32 /* Floating point register 0 */ +#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'. */ +#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) + +/* 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 + +/* Nonzero if register N requires conversion + from raw format to virtual format. */ + +#define REGISTER_CONVERTIBLE(N) (0) + +/* Convert data from raw format for register REGNUM + to virtual format for register REGNUM. */ + +#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) \ +{ bcopy ((FROM), (TO), 4); } + +/* Convert data from virtual format for register REGNUM + to raw format for register REGNUM. */ + +#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) \ +{ bcopy ((FROM), (TO), 4); } + +/* 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) + +/* 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) \ + bcopy ((int *)REGBUF+8, VALBUF, TYPE_LENGTH (TYPE)) + +/* Write into appropriate registers a function return value + of type TYPE, given in virtual format. */ +/* On sparc, values are returned in register %o0. */ +#define STORE_RETURN_VALUE(TYPE,VALBUF) \ + write_register_bytes (REGISTER_BYTE (8), VALBUF, TYPE_LENGTH (TYPE)) + +/* 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) (read_memory_integer (((int *)(REGBUF))[SP_REGNUM]+(16*4), 4)) + +/* Enable use of alternate code to read and write registers. */ + +#define NEW_SUN_PTRACE + +/* Enable use of alternate code for Sun's format of core dump file. */ + +#define NEW_SUN_CORE + +/* Do implement the attach and detach commands. */ + +#define ATTACH_DETACH + +/* It is safe to look for symsegs on a Sun, because Sun's ld + does not screw up with random garbage at end of file. */ + +#define READ_GDB_SYMSEGS + +/* The SPARC processor has register windows. */ + +#define HAVE_REGISTER_WINDOWS + +/* Describe the pointer in each stack frame to the previous stack frame + (its caller). */ +#include <machine/reg.h> + +#define GET_RWINDOW_REG(FRAME, REG) \ + (read_memory_integer (&((struct rwindow *)FRAME)->REG, 4)) + +/* FRAME_CHAIN takes a frame's nominal address + and produces the frame's chain-pointer. + + FRAME_CHAIN_COMBINE takes the chain pointer and the frame's nominal address + and produces the nominal address of the caller frame. + + However, if FRAME_CHAIN_VALID returns zero, + it means the given frame is the outermost one and has no caller. + In that case, FRAME_CHAIN_COMBINE is not used. */ + +/* 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. */ + +#define FRAME_CHAIN(thisframe) \ + GET_RWINDOW_REG (thisframe, rw_in[6]) + +#define FRAME_CHAIN_VALID(chain, thisframe) \ + (chain != 0 && (FRAME_SAVED_PC (thisframe, 0) >= first_object_file_end)) + +#define FRAME_CHAIN_COMBINE(chain, thisframe) (chain) + +/* Define other aspects of the stack frame. */ + +#define FRAME_SAVED_PC(frame, next_frame) frame_saved_pc (frame, next_frame) + +/* 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 + +/* Put here the code to store, into a struct frame_saved_regs, + the addresses of the saved registers of frame described by FRAME_INFO. + This includes special registers such as pc and fp saved in special + ways in the stack frame. sp is even more special: + the address we return for it IS the sp for the next frame. + + On the Sun 4, the only time all registers are saved is when + a dummy frame is involved. Otherwise, the only saved registers + are the LOCAL and IN registers which are saved as a result + of the "save/restore" opcodes. This condition is determined + by address rather than by value. */ + +#define FRAME_FIND_SAVED_REGS(fi, frame_saved_regs) \ +{ register int regnum; \ + register CORE_ADDR pc; \ + FRAME frame = (fi).frame; \ + FRAME next_frame = (fi).next_frame; \ + bzero (&frame_saved_regs, sizeof frame_saved_regs); \ + if ((fi).pc >= frame - CALL_DUMMY_LENGTH - 0x140 \ + && (fi).pc <= frame) \ + { \ + for (regnum = 0; regnum < 32; regnum++) \ + (frame_saved_regs).regs[regnum+FP0_REGNUM] = frame + regnum * 4 - 0x80;\ + for (regnum = 1; regnum < 8; regnum++) \ + (frame_saved_regs).regs[regnum] = frame + regnum * 4 - 0xa0; \ + for (regnum = 0; regnum < 8; regnum++) \ + (frame_saved_regs).regs[regnum+24] = frame + regnum * 4 - 0xc0; \ + for (regnum = 0; regnum < 8; regnum++) \ + (frame_saved_regs).regs[regnum+64] = frame + regnum * 4 - 0xe0; \ + frame = (fi).next_frame ? \ + (fi).next_frame : read_register (SP_REGNUM); \ + } \ + else \ + { \ + for (regnum = 0; regnum < 16; regnum++) \ + (frame_saved_regs).regs[regnum+16] = frame + regnum * 4; \ + } \ + if (next_frame == 0) next_frame = read_register (SP_REGNUM); \ + for (regnum = 0; regnum < 8; regnum++) \ + (frame_saved_regs).regs[regnum+8] = next_frame + regnum * 4; \ + (frame_saved_regs).regs[FP_REGNUM] = frame + 14*4; \ + (frame_saved_regs).regs[SP_REGNUM] = frame; \ + (frame_saved_regs).regs[PC_REGNUM] = frame + 15*4; \ +} + +/* Things needed for making the inferior call functions. */ + +/* Push an empty stack frame, to record the current PC, etc. */ + +/* NOTE: to be perfectly correct, we will probably have to restore the + IN registers (which were the OUT registers of the calling frame). */ + +#define PUSH_DUMMY_FRAME \ +{ extern char registers[]; \ + register int regnum; \ + CORE_ADDR fp = read_register (FP_REGNUM); \ + CORE_ADDR pc = read_register (PC_REGNUM); \ + void do_save_insn (); \ + supply_register (RP_REGNUM, &pc); \ + do_save_insn (0x140); \ + fp = read_register (FP_REGNUM); \ + write_memory (fp - 0x80, ®isters[REGISTER_BYTE (FP0_REGNUM)], 32 * 4); \ + write_memory (fp - 0xa0, ®isters[REGISTER_BYTE (0)], 8 * 4); \ + write_memory (fp - 0xc0, ®isters[REGISTER_BYTE (24)], 8 * 4); \ + write_memory (fp - 0xe0, ®isters[REGISTER_BYTE (64)], 8 * 4); \ +} + +/* Discard from the stack the innermost frame, + restoring all saved registers. */ + +#define POP_FRAME \ +{ register CORE_ADDR fp = read_register (FP_REGNUM); \ + register int regnum; \ + struct frame_saved_regs fsr; \ + struct frame_info fi; \ + char raw_buffer_fp[REGISTER_BYTES]; \ + char raw_buffer_globals[REGISTER_BYTES]; \ + char raw_buffer_outs[REGISTER_BYTES]; \ + char raw_buffer_xx[REGISTER_BYTES]; \ + void do_restore_insn (); \ + fi = get_frame_info (fp); \ + get_frame_saved_regs (&fi, &fsr); \ + if (fsr.regs[FP0_REGNUM]) \ + read_memory (fsr.regs[FP0_REGNUM], raw_buffer_fp, 32 * 4); \ + if (fsr.regs[1]) \ + read_memory (fsr.regs[1], raw_buffer_globals, 7 * 4); \ + if (fsr.regs[24]) \ + read_memory (fsr.regs[24], raw_buffer_outs, 8 * 4); \ + if (fsr.regs[64]) \ + read_memory (fsr.regs[64], raw_buffer_xx, 8 * 4); \ + do_restore_insn (fsr.regs); \ + if (fsr.regs[FP0_REGNUM]) \ + write_register_bytes (REGISTER_BYTE (FP0_REGNUM), raw_buffer_fp, 32 * 4); \ + if (fsr.regs[1]) \ + write_register_bytes (REGISTER_BYTE (1), raw_buffer_globals, 7 * 4);\ + if (fsr.regs[24]) \ + write_register_bytes (REGISTER_BYTE (8), raw_buffer_outs, 8 * 4); \ + if (fsr.regs[64]) \ + write_register_bytes (REGISTER_BYTE (64), raw_buffer_xx, 8 * 4); \ + set_current_frame (read_register (FP_REGNUM)); \ +} + +/* This sequence of words is the instructions + + save %sp,-0x140,%sp + std %f30,[%fp-0x08] + std %f28,[%fp-0x10] + std %f26,[%fp-0x18] + std %f24,[%fp-0x20] + std %f22,[%fp-0x28] + std %f20,[%fp-0x30] + std %f18,[%fp-0x38] + std %f16,[%fp-0x40] + std %f14,[%fp-0x48] + std %f12,[%fp-0x50] + std %f10,[%fp-0x58] + std %f8,[%fp-0x60] + std %f6,[%fp-0x68] + std %f4,[%fp-0x70] + std %f2,[%fp-0x78] + std %f0,[%fp-0x80] + std %g6,[%fp-0x88] + std %g4,[%fp-0x90] + std %g2,[%fp-0x98] + std %g0,[%fp-0xa0] + std %i6,[%fp-0xa8] + std %i4,[%fp-0xb0] + std %i2,[%fp-0xb8] + std %i0,[%fp-0xc0] + nop ! stcsr [%fp-0xc4] + nop ! stfsr [%fp-0xc8] + nop ! wr %npc,[%fp-0xcc] + nop ! wr %pc,[%fp-0xd0] + rd %tbr,%o0 + st %o0,[%fp-0xd4] + rd %wim,%o1 + st %o0,[%fp-0xd8] + rd %psr,%o0 + st %o0,[%fp-0xdc] + rd %y,%o0 + st %o0,[%fp-0xe0] + + /..* The arguments are pushed at this point by GDB; + no code is needed in the dummy for this. + The CALL_DUMMY_START_OFFSET gives the position of + the following call instruction. *../ + + ld [%sp+0x58],%o5 + ld [%sp+0x44],%o4 + ld [%sp+0x50],%o3 + ld [%sp+0x4c],%o2 + ld [%sp+0x48],%o1 + call 0x34343434 + ld [%sp+0x44],%o0 + nop + ta 1 + nop + + note that this is 192 bytes, which is a multiple of 8 (not only 4) bytes. + note that the `call' insn is a relative, not an absolute call. + note that the `nop' at the end is needed to keep the trap from + clobbering things (if NPC pointed to garbage instead). + +We actually start executing at the `sethi', since the pushing of the +registers (as arguments) is done by PUSH_DUMMY_FRAME. If this were +real code, the arguments for the function called by the CALL would be +pushed between the list of ST insns and the CALL, and we could allow +it to execute through. But the arguments have to be pushed by GDB +after the PUSH_DUMMY_FRAME is done, and we cannot allow these ST +insns to be performed again, lest the registers saved be taken for +arguments. */ + +#define CALL_DUMMY { 0x9de3bee0, 0xfd3fbff8, 0xf93fbff0, 0xf53fbfe8, \ + 0xf13fbfe0, 0xed3fbfd8, 0xe93fbfd0, 0xe53fbfc8, \ + 0xe13fbfc0, 0xdd3fbfb8, 0xd93fbfb0, 0xd53fbfa8, \ + 0xd13fbfa0, 0xcd3fbf98, 0xc93fbf90, 0xc53fbf88, \ + 0xc13fbf80, 0xcc3fbf78, 0xc83fbf70, 0xc43fbf68, \ + 0xc03fbf60, 0xfc3fbf58, 0xf83fbf50, 0xf43fbf48, \ + 0xf03fbf40, 0x01000000, 0x01000000, 0x01000000, \ + 0x01000000, 0x91580000, 0xd027bf50, 0x93500000, \ + 0xd027bf4c, 0x91480000, 0xd027bf48, 0x91400000, \ + 0xd027bf44, 0xda03a058, 0xd803a044, 0xd603a050, \ + 0xd403a04c, 0xd203a048, 0x40000000, 0xd003a044, \ + 0x01000000, 0x91d02001, 0x01000000, 0x01000000} + +#define CALL_DUMMY_LENGTH 192 + +#define CALL_DUMMY_START_OFFSET 148 + +#define CALL_DUMMY_STACK_ADJUST 68 + +/* 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, type) \ +{ \ + *(int *)((char *) dummyname+168) = (0x40000000|((fun-(pc+168))>>2)); \ + if (TYPE_CODE (type) == TYPE_CODE_STRUCT || TYPE_CODE (type) == TYPE_CODE_UNION) \ + *(int *)((char *) dummyname+176) = (TYPE_LENGTH (type) & 0x1fff); \ +} + +/* Sparc has no reliable single step ptrace call */ + +#define NO_SINGLE_STEP 1 + +/* KDB stuff flushed for now. */ |