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- /* Parameters for execution on any Hewlett-Packard PA-RISC machine.
- Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993
- Free Software Foundation, Inc.
-
- Contributed by the Center for Software Science at the
- University of Utah (pa-gdb-bugs@cs.utah.edu).
-
- 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. */
-
- /* Target system byte order. */
-
- #define TARGET_BYTE_ORDER BIG_ENDIAN
-
- /* Get at various relevent fields of an instruction word. */
-
- #define MASK_5 0x1f
- #define MASK_11 0x7ff
- #define MASK_14 0x3fff
- #define MASK_21 0x1fffff
-
- /* This macro gets bit fields using HP's numbering (MSB = 0) */
-
- #define GET_FIELD(X, FROM, TO) \
- ((X) >> 31 - (TO) & (1 << ((TO) - (FROM) + 1)) - 1)
-
- /* Watch out for NaNs */
-
- #define IEEE_FLOAT
-
- /* On the PA, any pass-by-value structure > 8 bytes is actually
- passed via a pointer regardless of its type or the compiler
- used. */
-
- #define REG_STRUCT_HAS_ADDR(gcc_p,type) \
- (TYPE_LENGTH (type) > 8)
-
- /* 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)
-
- /* If PC is in some function-call trampoline code, return the PC
- where the function itself actually starts. If not, return NULL. */
-
- #define SKIP_TRAMPOLINE_CODE(pc) skip_trampoline_code (pc, NULL)
-
- /* Return non-zero if we are in an appropriate trampoline. */
-
- #define IN_SOLIB_CALL_TRAMPOLINE(pc, name) \
- in_solib_call_trampoline (pc, name)
-
- #define IN_SOLIB_RETURN_TRAMPOLINE(pc, name) \
- in_solib_return_trampoline (pc, name)
-
- /* For some stupid reason find_pc_partial_function wants to treat
- trampoline symbols differently.
-
- In a nutshell, find_pc_partial_fucntion sets the low address for
- the function to the PC value that was passed in if the PC value
- passed in is a mst_trampoline symbol.
-
- This causes wait_for_inferior to execute code for stepping over
- or around a function (stop_pc == stop_func_start). This is
- extremely bad when we're stepping through a return from a shared
- library back to user code (which on the PA uses trampolines). */
- #define INHIBIT_SUNSOLIB_TRANSFER_TABLE_HACK
-
- /* 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. */
-
- #undef SAVED_PC_AFTER_CALL
- #define SAVED_PC_AFTER_CALL(frame) saved_pc_after_call (frame)
-
- /* Stack grows upward */
-
- #define INNER_THAN >
-
- /* Sequence of bytes for breakpoint instruction. */
-
- #define BREAKPOINT {0x00, 0x01, 0x00, 0x04}
-
- /* Amount PC must be decremented by after a breakpoint.
- This is often the number of bytes in BREAKPOINT
- but not always.
-
- Not on the PA-RISC */
-
- #define DECR_PC_AFTER_BREAK 0
-
- /* return instruction is bv r0(rp) or bv,n r0(rp)*/
-
- #define ABOUT_TO_RETURN(pc) ((read_memory_integer (pc, 4) | 0x2) == 0xE840C002)
-
- /* 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 128
-
- /* Initializer for an array of names of registers.
- There should be NUM_REGS strings in this initializer. */
-
- #define REGISTER_NAMES \
- {"flags", "r1", "rp", "r3", "r4", "r5", "r6", "r7", "r8", "r9", \
- "r10", "r11", "r12", "r13", "r14", "r15", "r16", "r17", "r18", "r19", \
- "r20", "r21", "r22", "r23", "r24", "r25", "r26", "dp", "ret0", "ret1", \
- "sp", "r31", "sar", "pcoqh", "pcsqh", "pcoqt", "pcsqt", \
- "eiem", "iir", "isr", "ior", "ipsw", "goto", "sr4", "sr0", "sr1", "sr2", \
- "sr3", "sr5", "sr6", "sr7", "cr0", "cr8", "cr9", "ccr", "cr12", "cr13", \
- "cr24", "cr25", "cr26", "mpsfu_high", "mpsfu_low", "mpsfu_ovflo", "pad", \
- "fpsr", "fpe1", "fpe2", "fpe3", "fpe4", "fpe5", "fpe6", "fpe7", \
- "fr4", "fr4R", "fr5", "fr5R", "fr6", "fr6R", "fr7", "fr7R", \
- "fr8", "fr8R", "fr9", "fr9R", "fr10", "fr10R", "fr11", "fr11R", \
- "fr12", "fr12R", "fr13", "fr13R", "fr14", "fr14R", "fr15", "fr15R", \
- "fr16", "fr16R", "fr17", "fr17R", "fr18", "fr18R", "fr19", "fr19R", \
- "fr20", "fr20R", "fr21", "fr21R", "fr22", "fr22R", "fr23", "fr23R", \
- "fr24", "fr24R", "fr25", "fr25R", "fr26", "fr26R", "fr27", "fr27R", \
- "fr28", "fr28R", "fr29", "fr29R", "fr30", "fr30R", "fr31", "fr31R"}
-
- /* 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 FLAGS_REGNUM 0 /* Various status flags */
- #define RP_REGNUM 2 /* return pointer */
- #define FP_REGNUM 3 /* Contains address of executing stack */
- /* frame */
- #define SP_REGNUM 30 /* Contains address of top of stack */
- #define SAR_REGNUM 32 /* shift amount register */
- #define IPSW_REGNUM 41 /* processor status word. ? */
- #define PCOQ_HEAD_REGNUM 33 /* instruction offset queue head */
- #define PCSQ_HEAD_REGNUM 34 /* instruction space queue head */
- #define PCOQ_TAIL_REGNUM 35 /* instruction offset queue tail */
- #define PCSQ_TAIL_REGNUM 36 /* instruction space queue tail */
- #define SR4_REGNUM 43 /* space register 4 */
- #define FP0_REGNUM 64 /* floating point reg. 0 */
- #define FP4_REGNUM 72
-
- /* compatibility with the rest of gdb. */
- #define PC_REGNUM PCOQ_HEAD_REGNUM
- #define NPC_REGNUM PCOQ_TAIL_REGNUM
-
- /* When fetching register values from an inferior or a core file,
- clean them up using this macro. BUF is a char pointer to
- the raw value of the register in the registers[] array. */
-
- #define CLEAN_UP_REGISTER_VALUE(regno, buf) \
- do { \
- if ((regno) == PCOQ_HEAD_REGNUM || (regno) == PCOQ_TAIL_REGNUM) \
- (buf)[3] &= ~0x3; \
- } while (0)
-
- /* Define DO_REGISTERS_INFO() to do machine-specific formatting
- of register dumps. */
-
- #define DO_REGISTERS_INFO(_regnum, fp) pa_do_registers_info (_regnum, fp)
-
- /* PA specific macro to see if the current instruction is nullified. */
- #define INSTRUCTION_NULLIFIED ((int)read_register (IPSW_REGNUM) & 0x00200000)
-
- /* Number of bytes of storage in the actual machine representation
- for register N. On the PA-RISC, all regs are 4 bytes, including
- the FP registers (they're accessed as two 4 byte halves). */
-
- #define REGISTER_RAW_SIZE(N) 4
-
- /* Total amount of space needed to store our copies of the machine's
- register state, the array `registers'. */
- #define REGISTER_BYTES (NUM_REGS * 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 program's representation
- for register N. */
-
- #define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N)
-
- /* Largest value REGISTER_RAW_SIZE can have. */
-
- #define MAX_REGISTER_RAW_SIZE 4
-
- /* 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) < FP4_REGNUM ? builtin_type_int : builtin_type_float)
-
- /* Store the address of the place in which to copy the structure the
- subroutine will return. This is called from call_function. */
-
- #define STORE_STRUCT_RETURN(ADDR, SP) {write_register (28, (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. */
-
- #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
- memcpy (VALBUF, (REGBUF) + REGISTER_BYTE(TYPE_LENGTH(TYPE) > 4 ? \
- FP4_REGNUM :28), TYPE_LENGTH (TYPE))
-
- /* Write into appropriate registers a function return value
- of type TYPE, given in virtual format. */
-
- #define STORE_RETURN_VALUE(TYPE,VALBUF) \
- write_register_bytes ((TYPE_LENGTH(TYPE) > 4 \
- ? REGISTER_BYTE (FP4_REGNUM) \
- : REGISTER_BYTE (28)), \
- (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) (*(int *)((REGBUF) + 28))
-
- /*
- * This macro defines the register numbers (from REGISTER_NAMES) that
- * are effectively unavailable to the user through ptrace(). It allows
- * us to include the whole register set in REGISTER_NAMES (inorder to
- * better support remote debugging). If it is used in
- * fetch/store_inferior_registers() gdb will not complain about I/O errors
- * on fetching these registers. If all registers in REGISTER_NAMES
- * are available, then return false (0).
- */
-
- #define CANNOT_STORE_REGISTER(regno) \
- ((regno) == 0) || \
- ((regno) == PCSQ_HEAD_REGNUM) || \
- ((regno) >= PCSQ_TAIL_REGNUM && (regno) < IPSW_REGNUM) || \
- ((regno) > IPSW_REGNUM && (regno) < FP4_REGNUM)
-
- #define INIT_EXTRA_FRAME_INFO(fromleaf, frame) init_extra_frame_info (fromleaf, frame)
-
- /* 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.
-
- 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 PA-RISC, the frame's nominal address
- is the address of a 4-byte word containing the calling frame's
- address (previous FP). */
-
- #define FRAME_CHAIN(thisframe) frame_chain (thisframe)
-
- #define FRAME_CHAIN_VALID(chain, thisframe) \
- frame_chain_valid (chain, thisframe)
-
- #define FRAME_CHAIN_COMBINE(chain, thisframe) (chain)
-
- /* 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_function_invocation(FI)
-
- #define FRAME_SAVED_PC(FRAME) frame_saved_pc (FRAME)
-
- #define FRAME_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 0
-
- #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
- hppa_frame_find_saved_regs (frame_info, &frame_saved_regs)
-
-
- /* Things needed for making the inferior call functions. */
-
- /* Push an empty stack frame, to record the current PC, etc. */
-
- #define PUSH_DUMMY_FRAME push_dummy_frame (&inf_status)
-
- /* Discard from the stack the innermost frame,
- restoring all saved registers. */
- #define POP_FRAME hppa_pop_frame ()
-
- /* This sequence of words is the instructions
-
- ; Call stack frame has already been built by gdb. Since we could be calling
- ; a varargs function, and we do not have the benefit of a stub to put things in
- ; the right place, we load the first 4 word of arguments into both the general
- ; and fp registers.
- call_dummy
- ldw -36(sp), arg0
- ldw -40(sp), arg1
- ldw -44(sp), arg2
- ldw -48(sp), arg3
- ldo -36(sp), r1
- fldws 0(0, r1), fr4
- fldds -4(0, r1), fr5
- fldws -8(0, r1), fr6
- fldds -12(0, r1), fr7
- ldil 0, r22 ; target will be placed here.
- ldo 0(r22), r22
- ldsid (0,r22), r4
- ldil 0, r1 ; _sr4export will be placed here.
- ldo 0(r1), r1
- ldsid (0,r1), r20
- combt,=,n r4, r20, text_space ; If target is in data space, do a
- ble 0(sr5, r22) ; "normal" procedure call
- copy r31, r2
- break 4, 8
- mtsp r21, sr0
- ble,n 0(sr0, r22)
- text_space ; Otherwise, go through _sr4export,
- ble (sr4, r1) ; which will return back here.
- stw 31,-24(r30)
- break 4, 8
- mtsp r21, sr0
- ble,n 0(sr0, r22)
- nop ; To avoid kernel bugs
- nop ; and keep the dummy 8 byte aligned
-
- The dummy decides if the target is in text space or data space. If
- it's in data space, there's no problem because the target can
- return back to the dummy. However, if the target is in text space,
- the dummy calls the secret, undocumented routine _sr4export, which
- calls a function in text space and can return to any space. Instead
- of including fake instructions to represent saved registers, we
- know that the frame is associated with the call dummy and treat it
- specially.
-
- The trailing NOPs are needed to avoid a bug in HPUX, BSD and OSF1
- kernels. If the memory at the location pointed to by the PC is
- 0xffffffff then a ptrace step call will fail (even if the instruction
- is nullified).
-
- The code to pop a dummy frame single steps three instructions
- starting with the last mtsp. This includes the nullified "instruction"
- following the ble (which is uninitialized junk). If the
- "instruction" following the last BLE is 0xffffffff, then the ptrace
- will fail and the dummy frame is not correctly popped.
-
- By placing a NOP in the delay slot of the BLE instruction we can be
- sure that we never try to execute a 0xffffffff instruction and
- avoid the kernel bug. The second NOP is needed to keep the call
- dummy 8 byte aligned. */
-
- #define CALL_DUMMY {0x4BDA3FB9, 0x4BD93FB1, 0x4BD83FA9, 0x4BD73FA1,\
- 0x37C13FB9, 0x24201004, 0x2C391005, 0x24311006,\
- 0x2C291007, 0x22C00000, 0x36D60000, 0x02C010A4,\
- 0x20200000, 0x34210000, 0x002010b4, 0x82842022,\
- 0xe6c06000, 0x081f0242, 0x00010004, 0x00151820,\
- 0xe6c00002, 0xe4202000, 0x6bdf3fd1, 0x00010004,\
- 0x00151820, 0xe6c00002, 0x08000240, 0x08000240}
-
- #define CALL_DUMMY_LENGTH 112
- #define CALL_DUMMY_START_OFFSET 0
-
- /*
- * Insert the specified number of args and function address
- * into a call sequence of the above form stored at DUMMYNAME.
- *
- * On the hppa we need to call the stack dummy through $$dyncall.
- * Therefore our version of FIX_CALL_DUMMY takes an extra argument,
- * real_pc, which is the location where gdb should start up the
- * inferior to do the function call.
- */
-
- #define FIX_CALL_DUMMY hppa_fix_call_dummy
-
- CORE_ADDR hppa_fix_call_dummy();
-
- #define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
- sp = hppa_push_arguments(nargs, args, sp, struct_return, struct_addr)
-
- /* The low two bits of the PC on the PA contain the privilege level. Some
- genius implementing a (non-GCC) compiler apparently decided this means
- that "addresses" in a text section therefore include a privilege level,
- and thus symbol tables should contain these bits. This seems like a
- bonehead thing to do--anyway, it seems to work for our purposes to just
- ignore those bits. */
- #define SMASH_TEXT_ADDRESS(addr) ((addr) &= ~0x3)
-
- #define GDB_TARGET_IS_HPPA
-
- #define BELIEVE_PCC_PROMOTION 1
-
- /*
- * Unwind table and descriptor.
- */
-
- struct unwind_table_entry {
- unsigned int region_start;
- unsigned int region_end;
-
- unsigned int Cannot_unwind : 1;
- unsigned int Millicode : 1;
- unsigned int Millicode_save_sr0 : 1;
- unsigned int Region_description : 2;
- unsigned int reserved1 : 1;
- unsigned int Entry_SR : 1;
- unsigned int Entry_FR : 4; /* number saved */
- unsigned int Entry_GR : 5; /* number saved */
- unsigned int Args_stored : 1;
- unsigned int Variable_Frame : 1;
- unsigned int Separate_Package_Body : 1;
- unsigned int Frame_Extension_Millicode:1;
- unsigned int Stack_Overflow_Check : 1;
- unsigned int Two_Instruction_SP_Increment:1;
- unsigned int Ada_Region : 1;
- /* Use this field to store a stub unwind type. */
- #define stub_type reserved2
- unsigned int reserved2 : 4;
- unsigned int Save_SP : 1;
- unsigned int Save_RP : 1;
- unsigned int Save_MRP_in_frame : 1;
- unsigned int extn_ptr_defined : 1;
- unsigned int Cleanup_defined : 1;
-
- unsigned int MPE_XL_interrupt_marker: 1;
- unsigned int HP_UX_interrupt_marker: 1;
- unsigned int Large_frame : 1;
- unsigned int reserved4 : 2;
- unsigned int Total_frame_size : 27;
- };
-
- /* HP linkers also generate unwinds for various linker-generated stubs.
- GDB reads in the stubs from the $UNWIND_END$ subspace, then
- "converts" them into normal unwind entries using some of the reserved
- fields to store the stub type. */
-
- struct stub_unwind_entry
- {
- /* The offset within the executable for the associated stub. */
- unsigned stub_offset;
-
- /* The type of stub this unwind entry describes. */
- char type;
-
- /* Unknown. Not needed by GDB at this time. */
- char prs_info;
-
- /* Length (in instructions) of the associated stub. */
- short stub_length;
- };
-
- /* Sizes (in bytes) of the native unwind entries. */
- #define UNWIND_ENTRY_SIZE 16
- #define STUB_UNWIND_ENTRY_SIZE 8
-
- /* The gaps represent linker stubs used in MPE and space for future
- expansion. */
- enum unwind_stub_types
- {
- LONG_BRANCH = 1,
- PARAMETER_RELOCATION = 2,
- EXPORT = 10,
- IMPORT = 11,
- };
-
-
- /* Info about the unwind table associated with an object file. This is hung
- off of the objfile->obj_private pointer, and is allocated in the objfile's
- psymbol obstack. This allows us to have unique unwind info for each
- executable and shared library that we are debugging. */
-
- struct obj_unwind_info {
- struct unwind_table_entry *table; /* Pointer to unwind info */
- struct unwind_table_entry *cache; /* Pointer to last entry we found */
- int last; /* Index of last entry */
- };
-
- #define OBJ_UNWIND_INFO(obj) ((struct obj_unwind_info *)obj->obj_private)
-
- extern CORE_ADDR target_read_pc PARAMS ((int));
- extern void target_write_pc PARAMS ((CORE_ADDR, int));
- extern CORE_ADDR skip_trampoline_code PARAMS ((CORE_ADDR, char *));
-
- #define TARGET_READ_PC(pid) target_read_pc (pid)
- #define TARGET_WRITE_PC(v,pid) target_write_pc (v,pid)
-
- /* For a number of horrible reasons we may have to adjust the location
- of variables on the stack. Ugh. */
- #define HPREAD_ADJUST_STACK_ADDRESS(ADDR) hpread_adjust_stack_address(ADDR)
-
- extern int hpread_adjust_stack_address PARAMS ((CORE_ADDR));
-