static const int hppa32_num_regs = 128;
static const int hppa64_num_regs = 96;
-static const int hppa64_call_dummy_breakpoint_offset = 22 * 4;
-
-/* DEPRECATED_CALL_DUMMY_LENGTH is computed based on the size of a
- word on the target machine, not the size of an instruction. Since
- a word on this target holds two instructions we have to divide the
- instruction size by two to get the word size of the dummy. */
-static const int hppa32_call_dummy_length = INSTRUCTION_SIZE * 28;
-static const int hppa64_call_dummy_length = INSTRUCTION_SIZE * 26 / 2;
-
/* 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
-/* Define offsets into the call dummy for the target function address.
- See comments related to CALL_DUMMY for more info. */
-#define FUNC_LDIL_OFFSET (INSTRUCTION_SIZE * 9)
-#define FUNC_LDO_OFFSET (INSTRUCTION_SIZE * 10)
-
/* Define offsets into the call dummy for the _sr4export address.
See comments related to CALL_DUMMY for more info. */
#define SR4EXPORT_LDIL_OFFSET (INSTRUCTION_SIZE * 12)
static unsigned extract_5r_store (unsigned int);
-static void hppa_frame_init_saved_regs (struct frame_info *frame);
-
-static void find_dummy_frame_regs (struct frame_info *, CORE_ADDR *);
-
-static int find_proc_framesize (CORE_ADDR);
-
-static int find_return_regnum (CORE_ADDR);
-
struct unwind_table_entry *find_unwind_entry (CORE_ADDR);
static int extract_17 (unsigned int);
-static unsigned deposit_21 (unsigned int, unsigned int);
-
static int extract_21 (unsigned);
-static unsigned deposit_14 (int, unsigned int);
-
static int extract_14 (unsigned);
static void unwind_command (char *, int);
static int sign_extend (unsigned int, unsigned int);
-static int restore_pc_queue (CORE_ADDR *);
-
static int hppa_alignof (struct type *);
static int prologue_inst_adjust_sp (unsigned long);
static int inst_saves_fr (unsigned long);
-static int pc_in_interrupt_handler (CORE_ADDR);
-
-static int pc_in_linker_stub (CORE_ADDR);
-
static int compare_unwind_entries (const void *, const void *);
static void read_unwind_info (struct objfile *);
CORE_ADDR hppa_skip_trampoline_code (CORE_ADDR pc);
int hppa_in_solib_call_trampoline (CORE_ADDR pc, char *name);
int hppa_in_solib_return_trampoline (CORE_ADDR pc, char *name);
-CORE_ADDR hppa_saved_pc_after_call (struct frame_info *frame);
int hppa_inner_than (CORE_ADDR lhs, CORE_ADDR rhs);
-CORE_ADDR hppa64_stack_align (CORE_ADDR sp);
int hppa_pc_requires_run_before_use (CORE_ADDR pc);
int hppa_instruction_nullified (void);
int hppa_register_raw_size (int reg_nr);
int hppa_register_byte (int reg_nr);
struct type * hppa32_register_virtual_type (int reg_nr);
struct type * hppa64_register_virtual_type (int reg_nr);
-void hppa_store_struct_return (CORE_ADDR addr, CORE_ADDR sp);
-void hppa64_extract_return_value (struct type *type, char *regbuf,
- char *valbuf);
-int hppa64_use_struct_convention (int gcc_p, struct type *type);
-void hppa64_store_return_value (struct type *type, char *valbuf);
int hppa_cannot_store_register (int regnum);
-void hppa_init_extra_frame_info (int fromleaf, struct frame_info *frame);
-CORE_ADDR hppa_frame_chain (struct frame_info *frame);
-int hppa_frame_chain_valid (CORE_ADDR chain, struct frame_info *thisframe);
-int hppa_frameless_function_invocation (struct frame_info *frame);
-CORE_ADDR hppa_frame_saved_pc (struct frame_info *frame);
-CORE_ADDR hppa_frame_args_address (struct frame_info *fi);
-int hppa_frame_num_args (struct frame_info *frame);
-void hppa_push_dummy_frame (void);
-void hppa_pop_frame (void);
-CORE_ADDR hppa_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun,
- int nargs, struct value **args,
- struct type *type, int gcc_p);
-CORE_ADDR hppa_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
- int struct_return, CORE_ADDR struct_addr);
CORE_ADDR hppa_smash_text_address (CORE_ADDR addr);
CORE_ADDR hppa_target_read_pc (ptid_t ptid);
void hppa_target_write_pc (CORE_ADDR v, ptid_t ptid);
/* In breakpoint.c */
extern int exception_catchpoints_are_fragile;
-/* Should call_function allocate stack space for a struct return? */
-
-int
-hppa64_use_struct_convention (int gcc_p, struct type *type)
-{
- /* RM: struct upto 128 bits are returned in registers */
- return TYPE_LENGTH (type) > 16;
-}
-
/* Handle 32/64-bit struct return conventions. */
static enum return_value_convention
return low_sign_extend (word & MASK_14, 14);
}
-/* deposit a 14 bit constant in a word */
-
-static unsigned
-deposit_14 (int opnd, unsigned word)
-{
- unsigned sign = (opnd < 0 ? 1 : 0);
-
- return word | ((unsigned) opnd << 1 & MASK_14) | sign;
-}
-
/* extract a 21 bit constant */
static int
return sign_extend (val, 21) << 11;
}
-/* deposit a 21 bit constant in a word. Although 21 bit constants are
- usually the top 21 bits of a 32 bit constant, we assume that only
- the low 21 bits of opnd are relevant */
-
-static unsigned
-deposit_21 (unsigned opnd, unsigned word)
-{
- unsigned val = 0;
-
- val |= get_field (opnd, 11 + 14, 11 + 18);
- val <<= 2;
- val |= get_field (opnd, 11 + 12, 11 + 13);
- val <<= 2;
- val |= get_field (opnd, 11 + 19, 11 + 20);
- val <<= 11;
- val |= get_field (opnd, 11 + 1, 11 + 11);
- val <<= 1;
- val |= get_field (opnd, 11 + 0, 11 + 0);
- return word | val;
-}
-
/* extract a 17 bit constant from branch instructions, returning the
19 bit signed value. */
as presented by hpread.c.
This is necessary because of the stack direction on the PA and the
- bizarre way in which someone (?) decided they wanted to handle
- frame pointerless code in GDB. */
-int
-hpread_adjust_stack_address (CORE_ADDR func_addr)
-{
- struct unwind_table_entry *u;
-
- u = find_unwind_entry (func_addr);
- if (!u)
- return 0;
- else
- return u->Total_frame_size << 3;
-}
-
-/* Called to determine if PC is in an interrupt handler of some
- kind. */
-
-static int
-pc_in_interrupt_handler (CORE_ADDR pc)
-{
- struct unwind_table_entry *u;
- struct minimal_symbol *msym_us;
-
- u = find_unwind_entry (pc);
- if (!u)
- return 0;
-
- /* Oh joys. HPUX sets the interrupt bit for _sigreturn even though
- its frame isn't a pure interrupt frame. Deal with this. */
- msym_us = lookup_minimal_symbol_by_pc (pc);
-
- return (u->HP_UX_interrupt_marker
- && !PC_IN_SIGTRAMP (pc, DEPRECATED_SYMBOL_NAME (msym_us)));
-}
-
-/* Called when no unwind descriptor was found for PC. Returns 1 if it
- appears that PC is in a linker stub.
-
- ?!? Need to handle stubs which appear in PA64 code. */
-
-static int
-pc_in_linker_stub (CORE_ADDR pc)
-{
- int found_magic_instruction = 0;
- int i;
- char buf[4];
-
- /* If unable to read memory, assume pc is not in a linker stub. */
- if (target_read_memory (pc, buf, 4) != 0)
- return 0;
-
- /* We are looking for something like
-
- ; $$dyncall jams RP into this special spot in the frame (RP')
- ; before calling the "call stub"
- ldw -18(sp),rp
-
- ldsid (rp),r1 ; Get space associated with RP into r1
- mtsp r1,sp ; Move it into space register 0
- be,n 0(sr0),rp) ; back to your regularly scheduled program */
-
- /* Maximum known linker stub size is 4 instructions. Search forward
- from the given PC, then backward. */
- for (i = 0; i < 4; i++)
- {
- /* If we hit something with an unwind, stop searching this direction. */
-
- if (find_unwind_entry (pc + i * 4) != 0)
- break;
-
- /* Check for ldsid (rp),r1 which is the magic instruction for a
- return from a cross-space function call. */
- if (read_memory_integer (pc + i * 4, 4) == 0x004010a1)
- {
- found_magic_instruction = 1;
- break;
- }
- /* Add code to handle long call/branch and argument relocation stubs
- here. */
- }
-
- if (found_magic_instruction != 0)
- return 1;
-
- /* Now look backward. */
- for (i = 0; i < 4; i++)
- {
- /* If we hit something with an unwind, stop searching this direction. */
-
- if (find_unwind_entry (pc - i * 4) != 0)
- break;
-
- /* Check for ldsid (rp),r1 which is the magic instruction for a
- return from a cross-space function call. */
- if (read_memory_integer (pc - i * 4, 4) == 0x004010a1)
- {
- found_magic_instruction = 1;
- break;
- }
- /* Add code to handle long call/branch and argument relocation stubs
- here. */
- }
- return found_magic_instruction;
-}
-
-static int
-find_return_regnum (CORE_ADDR pc)
-{
- struct unwind_table_entry *u;
-
- u = find_unwind_entry (pc);
-
- if (!u)
- return RP_REGNUM;
-
- if (u->Millicode)
- return 31;
-
- return RP_REGNUM;
-}
-
-/* Return size of frame, or -1 if we should use a frame pointer. */
-static int
-find_proc_framesize (CORE_ADDR pc)
-{
- struct unwind_table_entry *u;
- struct minimal_symbol *msym_us;
-
- /* This may indicate a bug in our callers... */
- if (pc == (CORE_ADDR) 0)
- return -1;
-
- u = find_unwind_entry (pc);
-
- if (!u)
- {
- if (pc_in_linker_stub (pc))
- /* Linker stubs have a zero size frame. */
- return 0;
- else
- return -1;
- }
-
- msym_us = lookup_minimal_symbol_by_pc (pc);
-
- /* If Save_SP is set, and we're not in an interrupt or signal caller,
- then we have a frame pointer. Use it. */
- if (u->Save_SP
- && !pc_in_interrupt_handler (pc)
- && msym_us
- && !PC_IN_SIGTRAMP (pc, DEPRECATED_SYMBOL_NAME (msym_us)))
- return -1;
-
- return u->Total_frame_size << 3;
-}
-
-/* Return offset from sp at which rp is saved, or 0 if not saved. */
-static int rp_saved (CORE_ADDR);
-
-static int
-rp_saved (CORE_ADDR pc)
-{
- struct unwind_table_entry *u;
-
- /* A function at, and thus a return PC from, address 0? Not in HP-UX! */
- if (pc == (CORE_ADDR) 0)
- return 0;
-
- u = find_unwind_entry (pc);
-
- if (!u)
- {
- if (pc_in_linker_stub (pc))
- /* This is the so-called RP'. */
- return -24;
- else
- return 0;
- }
-
- if (u->Save_RP)
- return (TARGET_PTR_BIT == 64 ? -16 : -20);
- else if (u->stub_unwind.stub_type != 0)
- {
- switch (u->stub_unwind.stub_type)
- {
- case EXPORT:
- case IMPORT:
- return -24;
- case PARAMETER_RELOCATION:
- return -8;
- default:
- return 0;
- }
- }
- else
- return 0;
-}
-\f
-int
-hppa_frameless_function_invocation (struct frame_info *frame)
-{
- struct unwind_table_entry *u;
-
- u = find_unwind_entry (get_frame_pc (frame));
-
- if (u == 0)
- return 0;
-
- return (u->Total_frame_size == 0 && u->stub_unwind.stub_type == 0);
-}
-
-/* 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. */
-
-CORE_ADDR
-hppa_saved_pc_after_call (struct frame_info *frame)
-{
- int ret_regnum;
- CORE_ADDR pc;
- struct unwind_table_entry *u;
-
- ret_regnum = find_return_regnum (get_frame_pc (frame));
- pc = read_register (ret_regnum) & ~0x3;
-
- /* If PC is in a linker stub, then we need to dig the address
- the stub will return to out of the stack. */
- u = find_unwind_entry (pc);
- if (u && u->stub_unwind.stub_type != 0)
- return DEPRECATED_FRAME_SAVED_PC (frame);
- else
- return pc;
-}
-\f
-CORE_ADDR
-hppa_frame_saved_pc (struct frame_info *frame)
-{
- CORE_ADDR pc = get_frame_pc (frame);
- struct unwind_table_entry *u;
- CORE_ADDR old_pc = 0;
- int spun_around_loop = 0;
- int rp_offset = 0;
-
- /* BSD, HPUX & OSF1 all lay out the hardware state in the same manner
- at the base of the frame in an interrupt handler. Registers within
- are saved in the exact same order as GDB numbers registers. How
- convienent. */
- if (pc_in_interrupt_handler (pc))
- return read_memory_integer (get_frame_base (frame) + PCOQ_HEAD_REGNUM * 4,
- TARGET_PTR_BIT / 8) & ~0x3;
-
- if ((get_frame_pc (frame) >= get_frame_base (frame)
- && (get_frame_pc (frame)
- <= (get_frame_base (frame)
- /* A call dummy is sized in words, but it is actually a
- series of instructions. Account for that scaling
- factor. */
- + ((DEPRECATED_REGISTER_SIZE / INSTRUCTION_SIZE)
- * DEPRECATED_CALL_DUMMY_LENGTH)
- /* Similarly we have to account for 64bit wide register
- saves. */
- + (32 * DEPRECATED_REGISTER_SIZE)
- /* We always consider FP regs 8 bytes long. */
- + (NUM_REGS - FP0_REGNUM) * 8
- /* Similarly we have to account for 64bit wide register
- saves. */
- + (6 * DEPRECATED_REGISTER_SIZE)))))
- {
- return read_memory_integer ((get_frame_base (frame)
- + (TARGET_PTR_BIT == 64 ? -16 : -20)),
- TARGET_PTR_BIT / 8) & ~0x3;
- }
-
-#ifdef FRAME_SAVED_PC_IN_SIGTRAMP
- /* Deal with signal handler caller frames too. */
- if ((get_frame_type (frame) == SIGTRAMP_FRAME))
- {
- CORE_ADDR rp;
- FRAME_SAVED_PC_IN_SIGTRAMP (frame, &rp);
- return rp & ~0x3;
- }
-#endif
-
- if (hppa_frameless_function_invocation (frame))
- {
- int ret_regnum;
-
- ret_regnum = find_return_regnum (pc);
-
- /* If the next frame is an interrupt frame or a signal
- handler caller, then we need to look in the saved
- register area to get the return pointer (the values
- in the registers may not correspond to anything useful). */
- if (get_next_frame (frame)
- && ((get_frame_type (get_next_frame (frame)) == SIGTRAMP_FRAME)
- || pc_in_interrupt_handler (get_frame_pc (get_next_frame (frame)))))
- {
- CORE_ADDR *saved_regs;
- hppa_frame_init_saved_regs (get_next_frame (frame));
- saved_regs = deprecated_get_frame_saved_regs (get_next_frame (frame));
- if (read_memory_integer (saved_regs[FLAGS_REGNUM],
- TARGET_PTR_BIT / 8) & 0x2)
- {
- pc = read_memory_integer (saved_regs[31],
- TARGET_PTR_BIT / 8) & ~0x3;
-
- /* Syscalls are really two frames. The syscall stub itself
- with a return pointer in %rp and the kernel call with
- a return pointer in %r31. We return the %rp variant
- if %r31 is the same as frame->pc. */
- if (pc == get_frame_pc (frame))
- pc = read_memory_integer (saved_regs[RP_REGNUM],
- TARGET_PTR_BIT / 8) & ~0x3;
- }
- else
- pc = read_memory_integer (saved_regs[RP_REGNUM],
- TARGET_PTR_BIT / 8) & ~0x3;
- }
- else
- pc = read_register (ret_regnum) & ~0x3;
- }
- else
- {
- spun_around_loop = 0;
- old_pc = pc;
-
- restart:
- rp_offset = rp_saved (pc);
-
- /* Similar to code in frameless function case. If the next
- frame is a signal or interrupt handler, then dig the right
- information out of the saved register info. */
- if (rp_offset == 0
- && get_next_frame (frame)
- && ((get_frame_type (get_next_frame (frame)) == SIGTRAMP_FRAME)
- || pc_in_interrupt_handler (get_frame_pc (get_next_frame (frame)))))
- {
- CORE_ADDR *saved_regs;
- hppa_frame_init_saved_regs (get_next_frame (frame));
- saved_regs = deprecated_get_frame_saved_regs (get_next_frame (frame));
- if (read_memory_integer (saved_regs[FLAGS_REGNUM],
- TARGET_PTR_BIT / 8) & 0x2)
- {
- pc = read_memory_integer (saved_regs[31],
- TARGET_PTR_BIT / 8) & ~0x3;
-
- /* Syscalls are really two frames. The syscall stub itself
- with a return pointer in %rp and the kernel call with
- a return pointer in %r31. We return the %rp variant
- if %r31 is the same as frame->pc. */
- if (pc == get_frame_pc (frame))
- pc = read_memory_integer (saved_regs[RP_REGNUM],
- TARGET_PTR_BIT / 8) & ~0x3;
- }
- else
- pc = read_memory_integer (saved_regs[RP_REGNUM],
- TARGET_PTR_BIT / 8) & ~0x3;
- }
- else if (rp_offset == 0)
- {
- old_pc = pc;
- pc = read_register (RP_REGNUM) & ~0x3;
- }
- else
- {
- old_pc = pc;
- pc = read_memory_integer (get_frame_base (frame) + rp_offset,
- TARGET_PTR_BIT / 8) & ~0x3;
- }
- }
-
- /* If PC is inside a linker stub, then dig out the address the stub
- will return to.
-
- Don't do this for long branch stubs. Why? For some unknown reason
- _start is marked as a long branch stub in hpux10. */
- u = find_unwind_entry (pc);
- if (u && u->stub_unwind.stub_type != 0
- && u->stub_unwind.stub_type != LONG_BRANCH)
- {
- unsigned int insn;
-
- /* If this is a dynamic executable, and we're in a signal handler,
- then the call chain will eventually point us into the stub for
- _sigreturn. Unlike most cases, we'll be pointed to the branch
- to the real sigreturn rather than the code after the real branch!.
-
- Else, try to dig the address the stub will return to in the normal
- fashion. */
- insn = read_memory_integer (pc, 4);
- if ((insn & 0xfc00e000) == 0xe8000000)
- return (pc + extract_17 (insn) + 8) & ~0x3;
- else
- {
- if (old_pc == pc)
- spun_around_loop++;
-
- if (spun_around_loop > 1)
- {
- /* We're just about to go around the loop again with
- no more hope of success. Die. */
- error ("Unable to find return pc for this frame");
- }
- else
- goto restart;
- }
- }
-
- return pc;
-}
-\f
-/* We need to correct the PC and the FP for the outermost frame when we are
- in a system call. */
-
-void
-hppa_init_extra_frame_info (int fromleaf, struct frame_info *frame)
-{
- int flags;
- int framesize;
-
- if (get_next_frame (frame) && !fromleaf)
- return;
-
- /* If the next frame represents a frameless function invocation then
- we have to do some adjustments that are normally done by
- DEPRECATED_FRAME_CHAIN. (DEPRECATED_FRAME_CHAIN is not called in
- this case.) */
- if (fromleaf)
- {
- /* Find the framesize of *this* frame without peeking at the PC
- in the current frame structure (it isn't set yet). */
- framesize = find_proc_framesize (DEPRECATED_FRAME_SAVED_PC (get_next_frame (frame)));
-
- /* Now adjust our base frame accordingly. If we have a frame pointer
- use it, else subtract the size of this frame from the current
- frame. (we always want frame->frame to point at the lowest address
- in the frame). */
- if (framesize == -1)
- deprecated_update_frame_base_hack (frame, deprecated_read_fp ());
- else
- deprecated_update_frame_base_hack (frame, get_frame_base (frame) - framesize);
- return;
- }
-
- flags = read_register (FLAGS_REGNUM);
- if (flags & 2) /* In system call? */
- deprecated_update_frame_pc_hack (frame, read_register (31) & ~0x3);
-
- /* The outermost frame is always derived from PC-framesize
-
- One might think frameless innermost frames should have
- a frame->frame that is the same as the parent's frame->frame.
- That is wrong; frame->frame in that case should be the *high*
- address of the parent's frame. It's complicated as hell to
- explain, but the parent *always* creates some stack space for
- the child. So the child actually does have a frame of some
- sorts, and its base is the high address in its parent's frame. */
- framesize = find_proc_framesize (get_frame_pc (frame));
- if (framesize == -1)
- deprecated_update_frame_base_hack (frame, deprecated_read_fp ());
- else
- deprecated_update_frame_base_hack (frame, read_register (SP_REGNUM) - framesize);
-}
-\f
-/* Given a GDB frame, determine the address of the calling function's
- frame. This will be used to create a new GDB frame struct, and
- then DEPRECATED_INIT_EXTRA_FRAME_INFO and DEPRECATED_INIT_FRAME_PC
- will be called for the new frame.
-
- This may involve searching through prologues for several functions
- at boundaries where GCC calls HP C code, or where code which has
- a frame pointer calls code without a frame pointer. */
-
-CORE_ADDR
-hppa_frame_chain (struct frame_info *frame)
-{
- int my_framesize, caller_framesize;
- struct unwind_table_entry *u;
- CORE_ADDR frame_base;
- struct frame_info *tmp_frame;
-
- /* A frame in the current frame list, or zero. */
- struct frame_info *saved_regs_frame = 0;
- /* Where the registers were saved in saved_regs_frame. If
- saved_regs_frame is zero, this is garbage. */
- CORE_ADDR *saved_regs = NULL;
-
- CORE_ADDR caller_pc;
-
- struct minimal_symbol *min_frame_symbol;
- struct symbol *frame_symbol;
- char *frame_symbol_name;
-
- /* If this is a threaded application, and we see the
- routine "__pthread_exit", treat it as the stack root
- for this thread. */
- min_frame_symbol = lookup_minimal_symbol_by_pc (get_frame_pc (frame));
- frame_symbol = find_pc_function (get_frame_pc (frame));
-
- if ((min_frame_symbol != 0) /* && (frame_symbol == 0) */ )
- {
- /* The test above for "no user function name" would defend
- against the slim likelihood that a user might define a
- routine named "__pthread_exit" and then try to debug it.
-
- If it weren't commented out, and you tried to debug the
- pthread library itself, you'd get errors.
-
- So for today, we don't make that check. */
- frame_symbol_name = DEPRECATED_SYMBOL_NAME (min_frame_symbol);
- if (frame_symbol_name != 0)
- {
- if (0 == strncmp (frame_symbol_name,
- THREAD_INITIAL_FRAME_SYMBOL,
- THREAD_INITIAL_FRAME_SYM_LEN))
- {
- /* Pretend we've reached the bottom of the stack. */
- return (CORE_ADDR) 0;
- }
- }
- } /* End of hacky code for threads. */
-
- /* Handle HPUX, BSD, and OSF1 style interrupt frames first. These
- are easy; at *sp we have a full save state strucutre which we can
- pull the old stack pointer from. Also see frame_saved_pc for
- code to dig a saved PC out of the save state structure. */
- if (pc_in_interrupt_handler (get_frame_pc (frame)))
- frame_base = read_memory_integer (get_frame_base (frame) + SP_REGNUM * 4,
- TARGET_PTR_BIT / 8);
-#ifdef FRAME_BASE_BEFORE_SIGTRAMP
- else if ((get_frame_type (frame) == SIGTRAMP_FRAME))
- {
- FRAME_BASE_BEFORE_SIGTRAMP (frame, &frame_base);
- }
-#endif
- else
- frame_base = get_frame_base (frame);
-
- /* Get frame sizes for the current frame and the frame of the
- caller. */
- my_framesize = find_proc_framesize (get_frame_pc (frame));
- caller_pc = DEPRECATED_FRAME_SAVED_PC (frame);
-
- /* If we can't determine the caller's PC, then it's not likely we can
- really determine anything meaningful about its frame. We'll consider
- this to be stack bottom. */
- if (caller_pc == (CORE_ADDR) 0)
- return (CORE_ADDR) 0;
-
- caller_framesize = find_proc_framesize (DEPRECATED_FRAME_SAVED_PC (frame));
-
- /* If caller does not have a frame pointer, then its frame
- can be found at current_frame - caller_framesize. */
- if (caller_framesize != -1)
- {
- return frame_base - caller_framesize;
- }
- /* Both caller and callee have frame pointers and are GCC compiled
- (SAVE_SP bit in unwind descriptor is on for both functions.
- The previous frame pointer is found at the top of the current frame. */
- if (caller_framesize == -1 && my_framesize == -1)
- {
- return read_memory_integer (frame_base, TARGET_PTR_BIT / 8);
- }
- /* Caller has a frame pointer, but callee does not. This is a little
- more difficult as GCC and HP C lay out locals and callee register save
- areas very differently.
-
- The previous frame pointer could be in a register, or in one of
- several areas on the stack.
-
- Walk from the current frame to the innermost frame examining
- unwind descriptors to determine if %r3 ever gets saved into the
- stack. If so return whatever value got saved into the stack.
- If it was never saved in the stack, then the value in %r3 is still
- valid, so use it.
-
- We use information from unwind descriptors to determine if %r3
- is saved into the stack (Entry_GR field has this information). */
-
- for (tmp_frame = frame; tmp_frame; tmp_frame = get_next_frame (tmp_frame))
- {
- u = find_unwind_entry (get_frame_pc (tmp_frame));
-
- if (!u)
- {
- /* We could find this information by examining prologues. I don't
- think anyone has actually written any tools (not even "strip")
- which leave them out of an executable, so maybe this is a moot
- point. */
- /* ??rehrauer: Actually, it's quite possible to stepi your way into
- code that doesn't have unwind entries. For example, stepping into
- the dynamic linker will give you a PC that has none. Thus, I've
- disabled this warning. */
-#if 0
- warning ("Unable to find unwind for PC 0x%x -- Help!", get_frame_pc (tmp_frame));
-#endif
- return (CORE_ADDR) 0;
- }
-
- if (u->Save_SP
- || (get_frame_type (tmp_frame) == SIGTRAMP_FRAME)
- || pc_in_interrupt_handler (get_frame_pc (tmp_frame)))
- break;
-
- /* Entry_GR specifies the number of callee-saved general registers
- saved in the stack. It starts at %r3, so %r3 would be 1. */
- if (u->Entry_GR >= 1)
- {
- /* The unwind entry claims that r3 is saved here. However,
- in optimized code, GCC often doesn't actually save r3.
- We'll discover this if we look at the prologue. */
- hppa_frame_init_saved_regs (tmp_frame);
- saved_regs = deprecated_get_frame_saved_regs (tmp_frame);
- saved_regs_frame = tmp_frame;
-
- /* If we have an address for r3, that's good. */
- if (saved_regs[DEPRECATED_FP_REGNUM])
- break;
- }
- }
-
- if (tmp_frame)
- {
- /* We may have walked down the chain into a function with a frame
- pointer. */
- if (u->Save_SP
- && !(get_frame_type (tmp_frame) == SIGTRAMP_FRAME)
- && !pc_in_interrupt_handler (get_frame_pc (tmp_frame)))
- {
- return read_memory_integer (get_frame_base (tmp_frame), TARGET_PTR_BIT / 8);
- }
- /* %r3 was saved somewhere in the stack. Dig it out. */
- else
- {
- /* Sick.
-
- For optimization purposes many kernels don't have the
- callee saved registers into the save_state structure upon
- entry into the kernel for a syscall; the optimization
- is usually turned off if the process is being traced so
- that the debugger can get full register state for the
- process.
-
- This scheme works well except for two cases:
-
- * Attaching to a process when the process is in the
- kernel performing a system call (debugger can't get
- full register state for the inferior process since
- the process wasn't being traced when it entered the
- system call).
-
- * Register state is not complete if the system call
- causes the process to core dump.
-
-
- The following heinous code is an attempt to deal with
- the lack of register state in a core dump. It will
- fail miserably if the function which performs the
- system call has a variable sized stack frame. */
-
- if (tmp_frame != saved_regs_frame)
- {
- hppa_frame_init_saved_regs (tmp_frame);
- saved_regs = deprecated_get_frame_saved_regs (tmp_frame);
- }
-
- /* Abominable hack. */
- if (current_target.to_has_execution == 0
- && ((saved_regs[FLAGS_REGNUM]
- && (read_memory_integer (saved_regs[FLAGS_REGNUM],
- TARGET_PTR_BIT / 8)
- & 0x2))
- || (saved_regs[FLAGS_REGNUM] == 0
- && read_register (FLAGS_REGNUM) & 0x2)))
- {
- u = find_unwind_entry (DEPRECATED_FRAME_SAVED_PC (frame));
- if (!u)
- {
- return read_memory_integer (saved_regs[DEPRECATED_FP_REGNUM],
- TARGET_PTR_BIT / 8);
- }
- else
- {
- return frame_base - (u->Total_frame_size << 3);
- }
- }
-
- return read_memory_integer (saved_regs[DEPRECATED_FP_REGNUM],
- TARGET_PTR_BIT / 8);
- }
- }
- else
- {
- /* Get the innermost frame. */
- tmp_frame = frame;
- while (get_next_frame (tmp_frame) != NULL)
- tmp_frame = get_next_frame (tmp_frame);
-
- if (tmp_frame != saved_regs_frame)
- {
- hppa_frame_init_saved_regs (tmp_frame);
- saved_regs = deprecated_get_frame_saved_regs (tmp_frame);
- }
-
- /* Abominable hack. See above. */
- if (current_target.to_has_execution == 0
- && ((saved_regs[FLAGS_REGNUM]
- && (read_memory_integer (saved_regs[FLAGS_REGNUM],
- TARGET_PTR_BIT / 8)
- & 0x2))
- || (saved_regs[FLAGS_REGNUM] == 0
- && read_register (FLAGS_REGNUM) & 0x2)))
- {
- u = find_unwind_entry (DEPRECATED_FRAME_SAVED_PC (frame));
- if (!u)
- {
- return read_memory_integer (saved_regs[DEPRECATED_FP_REGNUM],
- TARGET_PTR_BIT / 8);
- }
- else
- {
- return frame_base - (u->Total_frame_size << 3);
- }
- }
-
- /* The value in %r3 was never saved into the stack (thus %r3 still
- holds the value of the previous frame pointer). */
- return deprecated_read_fp ();
- }
-}
-\f
-
-/* To see if a frame chain is valid, see if the caller looks like it
- was compiled with gcc. */
-
-int
-hppa_frame_chain_valid (CORE_ADDR chain, struct frame_info *thisframe)
-{
- struct minimal_symbol *msym_us;
- struct minimal_symbol *msym_start;
- struct unwind_table_entry *u, *next_u = NULL;
- struct frame_info *next;
-
- u = find_unwind_entry (get_frame_pc (thisframe));
-
- if (u == NULL)
- return 1;
-
- /* We can't just check that the same of msym_us is "_start", because
- someone idiotically decided that they were going to make a Ltext_end
- symbol with the same address. This Ltext_end symbol is totally
- indistinguishable (as nearly as I can tell) from the symbol for a function
- which is (legitimately, since it is in the user's namespace)
- named Ltext_end, so we can't just ignore it. */
- msym_us = lookup_minimal_symbol_by_pc (DEPRECATED_FRAME_SAVED_PC (thisframe));
- msym_start = lookup_minimal_symbol ("_start", NULL, NULL);
- if (msym_us
- && msym_start
- && SYMBOL_VALUE_ADDRESS (msym_us) == SYMBOL_VALUE_ADDRESS (msym_start))
- return 0;
-
- /* Grrrr. Some new idiot decided that they don't want _start for the
- PRO configurations; $START$ calls main directly.... Deal with it. */
- msym_start = lookup_minimal_symbol ("$START$", NULL, NULL);
- if (msym_us
- && msym_start
- && SYMBOL_VALUE_ADDRESS (msym_us) == SYMBOL_VALUE_ADDRESS (msym_start))
- return 0;
-
- next = get_next_frame (thisframe);
- if (next)
- next_u = find_unwind_entry (get_frame_pc (next));
-
- /* If this frame does not save SP, has no stack, isn't a stub,
- and doesn't "call" an interrupt routine or signal handler caller,
- then its not valid. */
- if (u->Save_SP || u->Total_frame_size || u->stub_unwind.stub_type != 0
- || (get_next_frame (thisframe) && (get_frame_type (get_next_frame (thisframe)) == SIGTRAMP_FRAME))
- || (next_u && next_u->HP_UX_interrupt_marker))
- return 1;
-
- if (pc_in_linker_stub (get_frame_pc (thisframe)))
- return 1;
-
- return 0;
-}
-
-/* These functions deal with saving and restoring register state
- around a function call in the inferior. They keep the stack
- double-word aligned; eventually, on an hp700, the stack will have
- to be aligned to a 64-byte boundary. */
-
-void
-hppa_push_dummy_frame (void)
-{
- CORE_ADDR sp, pc, pcspace;
- int regnum;
- CORE_ADDR int_buffer;
- double freg_buffer;
-
- pc = hppa_target_read_pc (inferior_ptid);
- int_buffer = read_register (FLAGS_REGNUM);
- if (int_buffer & 0x2)
- {
- const unsigned int sid = (pc >> 30) & 0x3;
- if (sid == 0)
- pcspace = read_register (SR4_REGNUM);
- else
- pcspace = read_register (SR4_REGNUM + 4 + sid);
- }
- else
- pcspace = read_register (PCSQ_HEAD_REGNUM);
-
- /* Space for "arguments"; the RP goes in here. */
- sp = read_register (SP_REGNUM) + 48;
- int_buffer = read_register (RP_REGNUM) | 0x3;
-
- /* The 32bit and 64bit ABIs save the return pointer into different
- stack slots. */
- if (DEPRECATED_REGISTER_SIZE == 8)
- write_memory (sp - 16, (char *) &int_buffer, DEPRECATED_REGISTER_SIZE);
- else
- write_memory (sp - 20, (char *) &int_buffer, DEPRECATED_REGISTER_SIZE);
-
- int_buffer = deprecated_read_fp ();
- write_memory (sp, (char *) &int_buffer, DEPRECATED_REGISTER_SIZE);
-
- write_register (DEPRECATED_FP_REGNUM, sp);
-
- sp += 2 * DEPRECATED_REGISTER_SIZE;
-
- for (regnum = 1; regnum < 32; regnum++)
- if (regnum != RP_REGNUM && regnum != DEPRECATED_FP_REGNUM)
- sp = push_word (sp, read_register (regnum));
-
- /* This is not necessary for the 64bit ABI. In fact it is dangerous. */
- if (DEPRECATED_REGISTER_SIZE != 8)
- sp += 4;
-
- for (regnum = FP0_REGNUM; regnum < NUM_REGS; regnum++)
- {
- deprecated_read_register_bytes (DEPRECATED_REGISTER_BYTE (regnum),
- (char *) &freg_buffer, 8);
- sp = push_bytes (sp, (char *) &freg_buffer, 8);
- }
- sp = push_word (sp, read_register (IPSW_REGNUM));
- sp = push_word (sp, read_register (SAR_REGNUM));
- sp = push_word (sp, pc);
- sp = push_word (sp, pcspace);
- sp = push_word (sp, pc + 4);
- sp = push_word (sp, pcspace);
- write_register (SP_REGNUM, sp);
-}
-
-static void
-find_dummy_frame_regs (struct frame_info *frame,
- CORE_ADDR frame_saved_regs[])
-{
- CORE_ADDR fp = get_frame_base (frame);
- int i;
-
- /* The 32bit and 64bit ABIs save RP into different locations. */
- if (DEPRECATED_REGISTER_SIZE == 8)
- frame_saved_regs[RP_REGNUM] = (fp - 16) & ~0x3;
- else
- frame_saved_regs[RP_REGNUM] = (fp - 20) & ~0x3;
-
- frame_saved_regs[DEPRECATED_FP_REGNUM] = fp;
-
- frame_saved_regs[1] = fp + (2 * DEPRECATED_REGISTER_SIZE);
-
- for (fp += 3 * DEPRECATED_REGISTER_SIZE, i = 3; i < 32; i++)
- {
- if (i != DEPRECATED_FP_REGNUM)
- {
- frame_saved_regs[i] = fp;
- fp += DEPRECATED_REGISTER_SIZE;
- }
- }
-
- /* This is not necessary or desirable for the 64bit ABI. */
- if (DEPRECATED_REGISTER_SIZE != 8)
- fp += 4;
-
- for (i = FP0_REGNUM; i < NUM_REGS; i++, fp += 8)
- frame_saved_regs[i] = fp;
-
- frame_saved_regs[IPSW_REGNUM] = fp;
- frame_saved_regs[SAR_REGNUM] = fp + DEPRECATED_REGISTER_SIZE;
- frame_saved_regs[PCOQ_HEAD_REGNUM] = fp + 2 * DEPRECATED_REGISTER_SIZE;
- frame_saved_regs[PCSQ_HEAD_REGNUM] = fp + 3 * DEPRECATED_REGISTER_SIZE;
- frame_saved_regs[PCOQ_TAIL_REGNUM] = fp + 4 * DEPRECATED_REGISTER_SIZE;
- frame_saved_regs[PCSQ_TAIL_REGNUM] = fp + 5 * DEPRECATED_REGISTER_SIZE;
-}
-
-void
-hppa_pop_frame (void)
-{
- struct frame_info *frame = get_current_frame ();
- CORE_ADDR fp, npc, target_pc;
- int regnum;
- CORE_ADDR *fsr;
- double freg_buffer;
-
- fp = get_frame_base (frame);
- hppa_frame_init_saved_regs (frame);
- fsr = deprecated_get_frame_saved_regs (frame);
-
-#ifndef NO_PC_SPACE_QUEUE_RESTORE
- if (fsr[IPSW_REGNUM]) /* Restoring a call dummy frame */
- restore_pc_queue (fsr);
-#endif
-
- for (regnum = 31; regnum > 0; regnum--)
- if (fsr[regnum])
- write_register (regnum, read_memory_integer (fsr[regnum],
- DEPRECATED_REGISTER_SIZE));
-
- for (regnum = NUM_REGS - 1; regnum >= FP0_REGNUM; regnum--)
- if (fsr[regnum])
- {
- read_memory (fsr[regnum], (char *) &freg_buffer, 8);
- deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (regnum),
- (char *) &freg_buffer, 8);
- }
-
- if (fsr[IPSW_REGNUM])
- write_register (IPSW_REGNUM,
- read_memory_integer (fsr[IPSW_REGNUM],
- DEPRECATED_REGISTER_SIZE));
-
- if (fsr[SAR_REGNUM])
- write_register (SAR_REGNUM,
- read_memory_integer (fsr[SAR_REGNUM],
- DEPRECATED_REGISTER_SIZE));
-
- /* If the PC was explicitly saved, then just restore it. */
- if (fsr[PCOQ_TAIL_REGNUM])
- {
- npc = read_memory_integer (fsr[PCOQ_TAIL_REGNUM],
- DEPRECATED_REGISTER_SIZE);
- write_register (PCOQ_TAIL_REGNUM, npc);
- }
- /* Else use the value in %rp to set the new PC. */
- else
- {
- npc = read_register (RP_REGNUM);
- write_pc (npc);
- }
-
- write_register (DEPRECATED_FP_REGNUM, read_memory_integer (fp, DEPRECATED_REGISTER_SIZE));
-
- if (fsr[IPSW_REGNUM]) /* call dummy */
- write_register (SP_REGNUM, fp - 48);
- else
- write_register (SP_REGNUM, fp);
-
- /* The PC we just restored may be inside a return trampoline. If so
- we want to restart the inferior and run it through the trampoline.
-
- Do this by setting a momentary breakpoint at the location the
- trampoline returns to.
-
- Don't skip through the trampoline if we're popping a dummy frame. */
- target_pc = SKIP_TRAMPOLINE_CODE (npc & ~0x3) & ~0x3;
- if (target_pc && !fsr[IPSW_REGNUM])
- {
- struct symtab_and_line sal;
- struct breakpoint *breakpoint;
- struct cleanup *old_chain;
-
- /* Set up our breakpoint. Set it to be silent as the MI code
- for "return_command" will print the frame we returned to. */
- sal = find_pc_line (target_pc, 0);
- sal.pc = target_pc;
- breakpoint = set_momentary_breakpoint (sal, null_frame_id, bp_finish);
- breakpoint->silent = 1;
-
- /* So we can clean things up. */
- old_chain = make_cleanup_delete_breakpoint (breakpoint);
-
- /* Start up the inferior. */
- clear_proceed_status ();
- proceed_to_finish = 1;
- proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0);
-
- /* Perform our cleanups. */
- do_cleanups (old_chain);
- }
- flush_cached_frames ();
-}
-
-/* After returning to a dummy on the stack, restore the instruction
- queue space registers. */
-
-static int
-restore_pc_queue (CORE_ADDR *fsr)
-{
- CORE_ADDR pc = read_pc ();
- CORE_ADDR new_pc = read_memory_integer (fsr[PCOQ_HEAD_REGNUM],
- TARGET_PTR_BIT / 8);
- struct target_waitstatus w;
- int insn_count;
-
- /* Advance past break instruction in the call dummy. */
- write_register (PCOQ_HEAD_REGNUM, pc + 4);
- write_register (PCOQ_TAIL_REGNUM, pc + 8);
-
- /* HPUX doesn't let us set the space registers or the space
- registers of the PC queue through ptrace. Boo, hiss.
- Conveniently, the call dummy has this sequence of instructions
- after the break:
- mtsp r21, sr0
- ble,n 0(sr0, r22)
-
- So, load up the registers and single step until we are in the
- right place. */
-
- write_register (21, read_memory_integer (fsr[PCSQ_HEAD_REGNUM],
- DEPRECATED_REGISTER_SIZE));
- write_register (22, new_pc);
-
- for (insn_count = 0; insn_count < 3; insn_count++)
- {
- /* FIXME: What if the inferior gets a signal right now? Want to
- merge this into wait_for_inferior (as a special kind of
- watchpoint? By setting a breakpoint at the end? Is there
- any other choice? Is there *any* way to do this stuff with
- ptrace() or some equivalent?). */
- resume (1, 0);
- target_wait (inferior_ptid, &w);
-
- if (w.kind == TARGET_WAITKIND_SIGNALLED)
- {
- stop_signal = w.value.sig;
- terminal_ours_for_output ();
- printf_unfiltered ("\nProgram terminated with signal %s, %s.\n",
- target_signal_to_name (stop_signal),
- target_signal_to_string (stop_signal));
- gdb_flush (gdb_stdout);
- return 0;
- }
- }
- target_terminal_ours ();
- target_fetch_registers (-1);
- return 1;
-}
-
-
-#ifdef PA20W_CALLING_CONVENTIONS
-
-/* This function pushes a stack frame with arguments as part of the
- inferior function calling mechanism.
-
- This is the version for the PA64, in which later arguments appear
- at higher addresses. (The stack always grows towards higher
- addresses.)
-
- We simply allocate the appropriate amount of stack space and put
- arguments into their proper slots. The call dummy code will copy
- arguments into registers as needed by the ABI.
-
- This ABI also requires that the caller provide an argument pointer
- to the callee, so we do that too. */
-
-CORE_ADDR
-hppa_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
- int struct_return, CORE_ADDR struct_addr)
-{
- /* array of arguments' offsets */
- int *offset = (int *) alloca (nargs * sizeof (int));
-
- /* array of arguments' lengths: real lengths in bytes, not aligned to
- word size */
- int *lengths = (int *) alloca (nargs * sizeof (int));
-
- /* The value of SP as it was passed into this function after
- aligning. */
- CORE_ADDR orig_sp = DEPRECATED_STACK_ALIGN (sp);
-
- /* The number of stack bytes occupied by the current argument. */
- int bytes_reserved;
-
- /* The total number of bytes reserved for the arguments. */
- int cum_bytes_reserved = 0;
-
- /* Similarly, but aligned. */
- int cum_bytes_aligned = 0;
- int i;
-
- /* Iterate over each argument provided by the user. */
- for (i = 0; i < nargs; i++)
- {
- struct type *arg_type = VALUE_TYPE (args[i]);
-
- /* Integral scalar values smaller than a register are padded on
- the left. We do this by promoting them to full-width,
- although the ABI says to pad them with garbage. */
- if (is_integral_type (arg_type)
- && TYPE_LENGTH (arg_type) < DEPRECATED_REGISTER_SIZE)
- {
- args[i] = value_cast ((TYPE_UNSIGNED (arg_type)
- ? builtin_type_unsigned_long
- : builtin_type_long),
- args[i]);
- arg_type = VALUE_TYPE (args[i]);
- }
-
- lengths[i] = TYPE_LENGTH (arg_type);
-
- /* Align the size of the argument to the word size for this
- target. */
- bytes_reserved = (lengths[i] + DEPRECATED_REGISTER_SIZE - 1) & -DEPRECATED_REGISTER_SIZE;
-
- offset[i] = cum_bytes_reserved;
-
- /* Aggregates larger than eight bytes (the only types larger
- than eight bytes we have) are aligned on a 16-byte boundary,
- possibly padded on the right with garbage. This may leave an
- empty word on the stack, and thus an unused register, as per
- the ABI. */
- if (bytes_reserved > 8)
- {
- /* Round up the offset to a multiple of two slots. */
- int new_offset = ((offset[i] + 2*DEPRECATED_REGISTER_SIZE-1)
- & -(2*DEPRECATED_REGISTER_SIZE));
-
- /* Note the space we've wasted, if any. */
- bytes_reserved += new_offset - offset[i];
- offset[i] = new_offset;
- }
-
- cum_bytes_reserved += bytes_reserved;
- }
-
- /* CUM_BYTES_RESERVED already accounts for all the arguments
- passed by the user. However, the ABIs mandate minimum stack space
- allocations for outgoing arguments.
-
- The ABIs also mandate minimum stack alignments which we must
- preserve. */
- cum_bytes_aligned = DEPRECATED_STACK_ALIGN (cum_bytes_reserved);
- sp += max (cum_bytes_aligned, REG_PARM_STACK_SPACE);
-
- /* Now write each of the args at the proper offset down the stack. */
- for (i = 0; i < nargs; i++)
- write_memory (orig_sp + offset[i], VALUE_CONTENTS (args[i]), lengths[i]);
-
- /* If a structure has to be returned, set up register 28 to hold its
- address */
- if (struct_return)
- write_register (28, struct_addr);
-
- /* For the PA64 we must pass a pointer to the outgoing argument list.
- The ABI mandates that the pointer should point to the first byte of
- storage beyond the register flushback area.
-
- However, the call dummy expects the outgoing argument pointer to
- be passed in register %r4. */
- write_register (4, orig_sp + REG_PARM_STACK_SPACE);
-
- /* ?!? This needs further work. We need to set up the global data
- pointer for this procedure. This assumes the same global pointer
- for every procedure. The call dummy expects the dp value to
- be passed in register %r6. */
- write_register (6, read_register (27));
-
- /* The stack will have 64 bytes of additional space for a frame marker. */
- return sp + 64;
-}
-
-#else
-
-/* This function pushes a stack frame with arguments as part of the
- inferior function calling mechanism.
-
- This is the version of the function for the 32-bit PA machines, in
- which later arguments appear at lower addresses. (The stack always
- grows towards higher addresses.)
-
- We simply allocate the appropriate amount of stack space and put
- arguments into their proper slots. The call dummy code will copy
- arguments into registers as needed by the ABI. */
-
-CORE_ADDR
-hppa_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
- int struct_return, CORE_ADDR struct_addr)
-{
- /* array of arguments' offsets */
- int *offset = (int *) alloca (nargs * sizeof (int));
-
- /* array of arguments' lengths: real lengths in bytes, not aligned to
- word size */
- int *lengths = (int *) alloca (nargs * sizeof (int));
-
- /* The number of stack bytes occupied by the current argument. */
- int bytes_reserved;
-
- /* The total number of bytes reserved for the arguments. */
- int cum_bytes_reserved = 0;
-
- /* Similarly, but aligned. */
- int cum_bytes_aligned = 0;
- int i;
-
- /* Iterate over each argument provided by the user. */
- for (i = 0; i < nargs; i++)
- {
- lengths[i] = TYPE_LENGTH (VALUE_TYPE (args[i]));
-
- /* Align the size of the argument to the word size for this
- target. */
- bytes_reserved = (lengths[i] + DEPRECATED_REGISTER_SIZE - 1) & -DEPRECATED_REGISTER_SIZE;
-
- offset[i] = (cum_bytes_reserved
- + (lengths[i] > 4 ? bytes_reserved : lengths[i]));
-
- /* If the argument is a double word argument, then it needs to be
- double word aligned. */
- if ((bytes_reserved == 2 * DEPRECATED_REGISTER_SIZE)
- && (offset[i] % 2 * DEPRECATED_REGISTER_SIZE))
- {
- int new_offset = 0;
- /* BYTES_RESERVED is already aligned to the word, so we put
- the argument at one word more down the stack.
-
- This will leave one empty word on the stack, and one unused
- register as mandated by the ABI. */
- new_offset = ((offset[i] + 2 * DEPRECATED_REGISTER_SIZE - 1)
- & -(2 * DEPRECATED_REGISTER_SIZE));
-
- if ((new_offset - offset[i]) >= 2 * DEPRECATED_REGISTER_SIZE)
- {
- bytes_reserved += DEPRECATED_REGISTER_SIZE;
- offset[i] += DEPRECATED_REGISTER_SIZE;
- }
- }
-
- cum_bytes_reserved += bytes_reserved;
-
- }
-
- /* CUM_BYTES_RESERVED already accounts for all the arguments passed
- by the user. However, the ABI mandates minimum stack space
- allocations for outgoing arguments.
-
- The ABI also mandates minimum stack alignments which we must
- preserve. */
- cum_bytes_aligned = DEPRECATED_STACK_ALIGN (cum_bytes_reserved);
- sp += max (cum_bytes_aligned, REG_PARM_STACK_SPACE);
-
- /* Now write each of the args at the proper offset down the stack.
- ?!? We need to promote values to a full register instead of skipping
- words in the stack. */
- for (i = 0; i < nargs; i++)
- write_memory (sp - offset[i], VALUE_CONTENTS (args[i]), lengths[i]);
-
- /* If a structure has to be returned, set up register 28 to hold its
- address */
- if (struct_return)
- write_register (28, struct_addr);
+ bizarre way in which someone (?) decided they wanted to handle
+ frame pointerless code in GDB. */
+int
+hpread_adjust_stack_address (CORE_ADDR func_addr)
+{
+ struct unwind_table_entry *u;
- /* The stack will have 32 bytes of additional space for a frame marker. */
- return sp + 32;
+ u = find_unwind_entry (func_addr);
+ if (!u)
+ return 0;
+ else
+ return u->Total_frame_size << 3;
}
-#endif
-
/* This function pushes a stack frame with arguments as part of the
inferior function calling mechanism.
return 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 DEPRECATED_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.
-
- This has to work across several versions of hpux, bsd, osf1. It has to
- work regardless of what compiler was used to build the inferior program.
- It should work regardless of whether or not end.o is available. It has
- to work even if gdb can not call into the dynamic loader in the inferior
- to query it for symbol names and addresses.
-
- Yes, all those cases should work. Luckily code exists to handle most
- of them. The complexity is in selecting exactly what scheme should
- be used to perform the inferior call.
-
- At the current time this routine is known not to handle cases where
- the program was linked with HP's compiler without including end.o.
-
- Please contact Jeff Law (law@cygnus.com) before changing this code. */
-
-CORE_ADDR
-hppa_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun, int nargs,
- struct value **args, struct type *type, int gcc_p)
-{
- CORE_ADDR dyncall_addr;
- struct minimal_symbol *msymbol;
- struct minimal_symbol *trampoline;
- int flags = read_register (FLAGS_REGNUM);
- struct unwind_table_entry *u = NULL;
- CORE_ADDR new_stub = 0;
- CORE_ADDR solib_handle = 0;
-
- /* Nonzero if we will use GCC's PLT call routine. This routine must be
- passed an import stub, not a PLABEL. It is also necessary to set %r19
- (the PIC register) before performing the call.
-
- If zero, then we are using __d_plt_call (HP's PLT call routine) or we
- are calling the target directly. When using __d_plt_call we want to
- use a PLABEL instead of an import stub. */
- int using_gcc_plt_call = 1;
-
-#ifdef GDB_TARGET_IS_HPPA_20W
- /* We currently use completely different code for the PA2.0W inferior
- function call sequences. This needs to be cleaned up. */
- {
- CORE_ADDR pcsqh, pcsqt, pcoqh, pcoqt, sr5;
- struct target_waitstatus w;
- int inst1, inst2;
- char buf[4];
- int status;
- struct objfile *objfile;
-
- /* We can not modify the PC space queues directly, so we start
- up the inferior and execute a couple instructions to set the
- space queues so that they point to the call dummy in the stack. */
- pcsqh = read_register (PCSQ_HEAD_REGNUM);
- sr5 = read_register (SR5_REGNUM);
- if (1)
- {
- pcoqh = read_register (PCOQ_HEAD_REGNUM);
- pcoqt = read_register (PCOQ_TAIL_REGNUM);
- if (target_read_memory (pcoqh, buf, 4) != 0)
- error ("Couldn't modify space queue\n");
- inst1 = extract_unsigned_integer (buf, 4);
-
- if (target_read_memory (pcoqt, buf, 4) != 0)
- error ("Couldn't modify space queue\n");
- inst2 = extract_unsigned_integer (buf, 4);
-
- /* BVE (r1) */
- *((int *) buf) = 0xe820d000;
- if (target_write_memory (pcoqh, buf, 4) != 0)
- error ("Couldn't modify space queue\n");
-
- /* NOP */
- *((int *) buf) = 0x08000240;
- if (target_write_memory (pcoqt, buf, 4) != 0)
- {
- *((int *) buf) = inst1;
- target_write_memory (pcoqh, buf, 4);
- error ("Couldn't modify space queue\n");
- }
-
- write_register (1, pc);
-
- /* Single step twice, the BVE instruction will set the space queue
- such that it points to the PC value written immediately above
- (ie the call dummy). */
- resume (1, 0);
- target_wait (inferior_ptid, &w);
- resume (1, 0);
- target_wait (inferior_ptid, &w);
-
- /* Restore the two instructions at the old PC locations. */
- *((int *) buf) = inst1;
- target_write_memory (pcoqh, buf, 4);
- *((int *) buf) = inst2;
- target_write_memory (pcoqt, buf, 4);
- }
-
- /* The call dummy wants the ultimate destination address initially
- in register %r5. */
- write_register (5, fun);
-
- /* We need to see if this objfile has a different DP value than our
- own (it could be a shared library for example). */
- ALL_OBJFILES (objfile)
- {
- struct obj_section *s;
- obj_private_data_t *obj_private;
-
- /* See if FUN is in any section within this shared library. */
- for (s = objfile->sections; s < objfile->sections_end; s++)
- if (s->addr <= fun && fun < s->endaddr)
- break;
-
- if (s >= objfile->sections_end)
- continue;
-
- obj_private = (obj_private_data_t *) objfile->obj_private;
-
- /* The DP value may be different for each objfile. But within an
- objfile each function uses the same dp value. Thus we do not need
- to grope around the opd section looking for dp values.
-
- ?!? This is not strictly correct since we may be in a shared library
- and want to call back into the main program. To make that case
- work correctly we need to set obj_private->dp for the main program's
- objfile, then remove this conditional. */
- if (obj_private->dp)
- write_register (27, obj_private->dp);
- break;
- }
- return pc;
- }
-#endif
-
-#ifndef GDB_TARGET_IS_HPPA_20W
- /* Prefer __gcc_plt_call over the HP supplied routine because
- __gcc_plt_call works for any number of arguments. */
- trampoline = NULL;
- if (lookup_minimal_symbol ("__gcc_plt_call", NULL, NULL) == NULL)
- using_gcc_plt_call = 0;
-
- msymbol = lookup_minimal_symbol ("$$dyncall", NULL, NULL);
- if (msymbol == NULL)
- error ("Can't find an address for $$dyncall trampoline");
-
- dyncall_addr = SYMBOL_VALUE_ADDRESS (msymbol);
-
- /* FUN could be a procedure label, in which case we have to get
- its real address and the value of its GOT/DP if we plan to
- call the routine via gcc_plt_call. */
- if ((fun & 0x2) && using_gcc_plt_call)
- {
- /* Get the GOT/DP value for the target function. It's
- at *(fun+4). Note the call dummy is *NOT* allowed to
- trash %r19 before calling the target function. */
- write_register (19, read_memory_integer ((fun & ~0x3) + 4,
- DEPRECATED_REGISTER_SIZE));
-
- /* Now get the real address for the function we are calling, it's
- at *fun. */
- fun = (CORE_ADDR) read_memory_integer (fun & ~0x3,
- TARGET_PTR_BIT / 8);
- }
- else
- {
-
-#ifndef GDB_TARGET_IS_PA_ELF
- /* FUN could be an export stub, the real address of a function, or
- a PLABEL. When using gcc's PLT call routine we must call an import
- stub rather than the export stub or real function for lazy binding
- to work correctly
-
- If we are using the gcc PLT call routine, then we need to
- get the import stub for the target function. */
- if (using_gcc_plt_call && som_solib_get_got_by_pc (fun))
- {
- struct objfile *objfile;
- struct minimal_symbol *funsymbol, *stub_symbol;
- CORE_ADDR newfun = 0;
-
- funsymbol = lookup_minimal_symbol_by_pc (fun);
- if (!funsymbol)
- error ("Unable to find minimal symbol for target function.\n");
-
- /* Search all the object files for an import symbol with the
- right name. */
- ALL_OBJFILES (objfile)
- {
- stub_symbol
- = lookup_minimal_symbol_solib_trampoline
- (DEPRECATED_SYMBOL_NAME (funsymbol), objfile);
-
- if (!stub_symbol)
- stub_symbol = lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (funsymbol),
- NULL, objfile);
-
- /* Found a symbol with the right name. */
- if (stub_symbol)
- {
- struct unwind_table_entry *u;
- /* It must be a shared library trampoline. */
- if (MSYMBOL_TYPE (stub_symbol) != mst_solib_trampoline)
- continue;
-
- /* It must also be an import stub. */
- u = find_unwind_entry (SYMBOL_VALUE (stub_symbol));
- if (u == NULL
- || (u->stub_unwind.stub_type != IMPORT
-#ifdef GDB_NATIVE_HPUX_11
- /* Sigh. The hpux 10.20 dynamic linker will blow
- chunks if we perform a call to an unbound function
- via the IMPORT_SHLIB stub. The hpux 11.00 dynamic
- linker will blow chunks if we do not call the
- unbound function via the IMPORT_SHLIB stub.
-
- We currently have no way to select bevahior on just
- the target. However, we only support HPUX/SOM in
- native mode. So we conditinalize on a native
- #ifdef. Ugly. Ugly. Ugly */
- && u->stub_unwind.stub_type != IMPORT_SHLIB
-#endif
- ))
- continue;
-
- /* OK. Looks like the correct import stub. */
- newfun = SYMBOL_VALUE (stub_symbol);
- fun = newfun;
-
- /* If we found an IMPORT stub, then we want to stop
- searching now. If we found an IMPORT_SHLIB, we want
- to continue the search in the hopes that we will find
- an IMPORT stub. */
- if (u->stub_unwind.stub_type == IMPORT)
- break;
- }
- }
-
- /* Ouch. We did not find an import stub. Make an attempt to
- do the right thing instead of just croaking. Most of the
- time this will actually work. */
- if (newfun == 0)
- write_register (19, som_solib_get_got_by_pc (fun));
-
- u = find_unwind_entry (fun);
- if (u
- && (u->stub_unwind.stub_type == IMPORT
- || u->stub_unwind.stub_type == IMPORT_SHLIB))
- trampoline = lookup_minimal_symbol ("__gcc_plt_call", NULL, NULL);
-
- /* If we found the import stub in the shared library, then we have
- to set %r19 before we call the stub. */
- if (u && u->stub_unwind.stub_type == IMPORT_SHLIB)
- write_register (19, som_solib_get_got_by_pc (fun));
- }
-#endif
- }
-
- /* If we are calling into another load module then have sr4export call the
- magic __d_plt_call routine which is linked in from end.o.
-
- You can't use _sr4export to make the call as the value in sp-24 will get
- fried and you end up returning to the wrong location. You can't call the
- target as the code to bind the PLT entry to a function can't return to a
- stack address.
-
- Also, query the dynamic linker in the inferior to provide a suitable
- PLABEL for the target function. */
- if (!using_gcc_plt_call)
- {
- CORE_ADDR new_fun;
-
- /* Get a handle for the shared library containing FUN. Given the
- handle we can query the shared library for a PLABEL. */
- solib_handle = som_solib_get_solib_by_pc (fun);
-
- if (solib_handle)
- {
- struct minimal_symbol *fmsymbol = lookup_minimal_symbol_by_pc (fun);
-
- trampoline = lookup_minimal_symbol ("__d_plt_call", NULL, NULL);
-
- if (trampoline == NULL)
- {
- error ("Can't find an address for __d_plt_call or __gcc_plt_call trampoline\nSuggest linking executable with -g or compiling with gcc.");
- }
-
- /* This is where sr4export will jump to. */
- new_fun = SYMBOL_VALUE_ADDRESS (trampoline);
-
- /* If the function is in a shared library, then call __d_shl_get to
- get a PLABEL for the target function. */
- new_stub = find_stub_with_shl_get (fmsymbol, solib_handle);
-
- if (new_stub == 0)
- error ("Can't find an import stub for %s", DEPRECATED_SYMBOL_NAME (fmsymbol));
-
- /* We have to store the address of the stub in __shlib_funcptr. */
- msymbol = lookup_minimal_symbol ("__shlib_funcptr", NULL,
- (struct objfile *) NULL);
-
- if (msymbol == NULL)
- error ("Can't find an address for __shlib_funcptr");
- target_write_memory (SYMBOL_VALUE_ADDRESS (msymbol),
- (char *) &new_stub, 4);
-
- /* We want sr4export to call __d_plt_call, so we claim it is
- the final target. Clear trampoline. */
- fun = new_fun;
- trampoline = NULL;
- }
- }
-
- /* Store upper 21 bits of function address into ldil. fun will either be
- the final target (most cases) or __d_plt_call when calling into a shared
- library and __gcc_plt_call is not available. */
- store_unsigned_integer
- (&dummy[FUNC_LDIL_OFFSET],
- INSTRUCTION_SIZE,
- deposit_21 (fun >> 11,
- extract_unsigned_integer (&dummy[FUNC_LDIL_OFFSET],
- INSTRUCTION_SIZE)));
-
- /* Store lower 11 bits of function address into ldo */
- store_unsigned_integer
- (&dummy[FUNC_LDO_OFFSET],
- INSTRUCTION_SIZE,
- deposit_14 (fun & MASK_11,
- extract_unsigned_integer (&dummy[FUNC_LDO_OFFSET],
- INSTRUCTION_SIZE)));
-#ifdef SR4EXPORT_LDIL_OFFSET
-
- {
- CORE_ADDR trampoline_addr;
-
- /* We may still need sr4export's address too. */
-
- if (trampoline == NULL)
- {
- msymbol = lookup_minimal_symbol ("_sr4export", NULL, NULL);
- if (msymbol == NULL)
- error ("Can't find an address for _sr4export trampoline");
-
- trampoline_addr = SYMBOL_VALUE_ADDRESS (msymbol);
- }
- else
- trampoline_addr = SYMBOL_VALUE_ADDRESS (trampoline);
-
-
- /* Store upper 21 bits of trampoline's address into ldil */
- store_unsigned_integer
- (&dummy[SR4EXPORT_LDIL_OFFSET],
- INSTRUCTION_SIZE,
- deposit_21 (trampoline_addr >> 11,
- extract_unsigned_integer (&dummy[SR4EXPORT_LDIL_OFFSET],
- INSTRUCTION_SIZE)));
-
- /* Store lower 11 bits of trampoline's address into ldo */
- store_unsigned_integer
- (&dummy[SR4EXPORT_LDO_OFFSET],
- INSTRUCTION_SIZE,
- deposit_14 (trampoline_addr & MASK_11,
- extract_unsigned_integer (&dummy[SR4EXPORT_LDO_OFFSET],
- INSTRUCTION_SIZE)));
- }
-#endif
-
- write_register (22, pc);
-
- /* If we are in a syscall, then we should call the stack dummy
- directly. $$dyncall is not needed as the kernel sets up the
- space id registers properly based on the value in %r31. In
- fact calling $$dyncall will not work because the value in %r22
- will be clobbered on the syscall exit path.
-
- Similarly if the current PC is in a shared library. Note however,
- this scheme won't work if the shared library isn't mapped into
- the same space as the stack. */
- if (flags & 2)
- return pc;
-#ifndef GDB_TARGET_IS_PA_ELF
- else if (som_solib_get_got_by_pc (hppa_target_read_pc (inferior_ptid)))
- return pc;
-#endif
- else
- return dyncall_addr;
-#endif
-}
-
/* If the pid is in a syscall, then the FP register is not readable.
We'll return zero in that case, rather than attempting to read it
and cause a warning. */
return (skip_prologue_hard_way (pc));
}
-/* Put here the code to store, into the 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. */
-
-void
-hppa_frame_find_saved_regs (struct frame_info *frame_info,
- CORE_ADDR frame_saved_regs[])
-{
- CORE_ADDR pc;
- struct unwind_table_entry *u;
- unsigned long inst, stack_remaining, save_gr, save_fr, save_rp, save_sp;
- int status, i, reg;
- char buf[4];
- int fp_loc = -1;
- int final_iteration;
-
- /* Zero out everything. */
- memset (frame_saved_regs, '\0', SIZEOF_FRAME_SAVED_REGS);
-
- /* Call dummy frames always look the same, so there's no need to
- examine the dummy code to determine locations of saved registers;
- instead, let find_dummy_frame_regs fill in the correct offsets
- for the saved registers. */
- if ((get_frame_pc (frame_info) >= get_frame_base (frame_info)
- && (get_frame_pc (frame_info)
- <= (get_frame_base (frame_info)
- /* A call dummy is sized in words, but it is actually a
- series of instructions. Account for that scaling
- factor. */
- + ((DEPRECATED_REGISTER_SIZE / INSTRUCTION_SIZE)
- * DEPRECATED_CALL_DUMMY_LENGTH)
- /* Similarly we have to account for 64bit wide register
- saves. */
- + (32 * DEPRECATED_REGISTER_SIZE)
- /* We always consider FP regs 8 bytes long. */
- + (NUM_REGS - FP0_REGNUM) * 8
- /* Similarly we have to account for 64bit wide register
- saves. */
- + (6 * DEPRECATED_REGISTER_SIZE)))))
- find_dummy_frame_regs (frame_info, frame_saved_regs);
-
- /* Interrupt handlers are special too. They lay out the register
- state in the exact same order as the register numbers in GDB. */
- if (pc_in_interrupt_handler (get_frame_pc (frame_info)))
- {
- for (i = 0; i < NUM_REGS; i++)
- {
- /* SP is a little special. */
- if (i == SP_REGNUM)
- frame_saved_regs[SP_REGNUM]
- = read_memory_integer (get_frame_base (frame_info) + SP_REGNUM * 4,
- TARGET_PTR_BIT / 8);
- else
- frame_saved_regs[i] = get_frame_base (frame_info) + i * 4;
- }
- return;
- }
-
-#ifdef FRAME_FIND_SAVED_REGS_IN_SIGTRAMP
- /* Handle signal handler callers. */
- if ((get_frame_type (frame_info) == SIGTRAMP_FRAME))
- {
- FRAME_FIND_SAVED_REGS_IN_SIGTRAMP (frame_info, frame_saved_regs);
- return;
- }
-#endif
-
- /* Get the starting address of the function referred to by the PC
- saved in frame. */
- pc = get_frame_func (frame_info);
-
- /* Yow! */
- u = find_unwind_entry (pc);
- if (!u)
- return;
-
- /* This is how much of a frame adjustment we need to account for. */
- stack_remaining = u->Total_frame_size << 3;
-
- /* Magic register saves we want to know about. */
- save_rp = u->Save_RP;
- save_sp = u->Save_SP;
-
- /* Turn the Entry_GR field into a bitmask. */
- save_gr = 0;
- for (i = 3; i < u->Entry_GR + 3; i++)
- {
- /* Frame pointer gets saved into a special location. */
- if (u->Save_SP && i == DEPRECATED_FP_REGNUM)
- continue;
-
- save_gr |= (1 << i);
- }
-
- /* Turn the Entry_FR field into a bitmask too. */
- save_fr = 0;
- for (i = 12; i < u->Entry_FR + 12; i++)
- save_fr |= (1 << i);
-
- /* The frame always represents the value of %sp at entry to the
- current function (and is thus equivalent to the "saved" stack
- pointer. */
- frame_saved_regs[SP_REGNUM] = get_frame_base (frame_info);
-
- /* Loop until we find everything of interest or hit a branch.
-
- For unoptimized GCC code and for any HP CC code this will never ever
- examine any user instructions.
-
- For optimized GCC code we're faced with problems. GCC will schedule
- its prologue and make prologue instructions available for delay slot
- filling. The end result is user code gets mixed in with the prologue
- and a prologue instruction may be in the delay slot of the first branch
- or call.
-
- Some unexpected things are expected with debugging optimized code, so
- we allow this routine to walk past user instructions in optimized
- GCC code. */
- final_iteration = 0;
- while ((save_gr || save_fr || save_rp || save_sp || stack_remaining > 0)
- && pc <= get_frame_pc (frame_info))
- {
- status = target_read_memory (pc, buf, 4);
- inst = extract_unsigned_integer (buf, 4);
-
- /* Yow! */
- if (status != 0)
- return;
-
- /* Note the interesting effects of this instruction. */
- stack_remaining -= prologue_inst_adjust_sp (inst);
-
- /* There are limited ways to store the return pointer into the
- stack. */
- if (inst == 0x6bc23fd9) /* stw rp,-0x14(sr0,sp) */
- {
- save_rp = 0;
- frame_saved_regs[RP_REGNUM] = get_frame_base (frame_info) - 20;
- }
- else if (inst == 0x0fc212c1) /* std rp,-0x10(sr0,sp) */
- {
- save_rp = 0;
- frame_saved_regs[RP_REGNUM] = get_frame_base (frame_info) - 16;
- }
-
- /* Note if we saved SP into the stack. This also happens to indicate
- the location of the saved frame pointer. */
- if ( (inst & 0xffffc000) == 0x6fc10000 /* stw,ma r1,N(sr0,sp) */
- || (inst & 0xffffc00c) == 0x73c10008) /* std,ma r1,N(sr0,sp) */
- {
- frame_saved_regs[DEPRECATED_FP_REGNUM] = get_frame_base (frame_info);
- save_sp = 0;
- }
-
- /* Account for general and floating-point register saves. */
- reg = inst_saves_gr (inst);
- if (reg >= 3 && reg <= 18
- && (!u->Save_SP || reg != DEPRECATED_FP_REGNUM))
- {
- save_gr &= ~(1 << reg);
-
- /* stwm with a positive displacement is a *post modify*. */
- if ((inst >> 26) == 0x1b
- && extract_14 (inst) >= 0)
- frame_saved_regs[reg] = get_frame_base (frame_info);
- /* A std has explicit post_modify forms. */
- else if ((inst & 0xfc00000c) == 0x70000008)
- frame_saved_regs[reg] = get_frame_base (frame_info);
- else
- {
- CORE_ADDR offset;
-
- if ((inst >> 26) == 0x1c)
- offset = (inst & 0x1 ? -1 << 13 : 0) | (((inst >> 4) & 0x3ff) << 3);
- else if ((inst >> 26) == 0x03)
- offset = low_sign_extend (inst & 0x1f, 5);
- else
- offset = extract_14 (inst);
-
- /* Handle code with and without frame pointers. */
- if (u->Save_SP)
- frame_saved_regs[reg]
- = get_frame_base (frame_info) + offset;
- else
- frame_saved_regs[reg]
- = (get_frame_base (frame_info) + (u->Total_frame_size << 3)
- + offset);
- }
- }
-
-
- /* GCC handles callee saved FP regs a little differently.
-
- It emits an instruction to put the value of the start of
- the FP store area into %r1. It then uses fstds,ma with
- a basereg of %r1 for the stores.
-
- HP CC emits them at the current stack pointer modifying
- the stack pointer as it stores each register. */
-
- /* ldo X(%r3),%r1 or ldo X(%r30),%r1. */
- if ((inst & 0xffffc000) == 0x34610000
- || (inst & 0xffffc000) == 0x37c10000)
- fp_loc = extract_14 (inst);
-
- reg = inst_saves_fr (inst);
- if (reg >= 12 && reg <= 21)
- {
- /* Note +4 braindamage below is necessary because the FP status
- registers are internally 8 registers rather than the expected
- 4 registers. */
- save_fr &= ~(1 << reg);
- if (fp_loc == -1)
- {
- /* 1st HP CC FP register store. After this instruction
- we've set enough state that the GCC and HPCC code are
- both handled in the same manner. */
- frame_saved_regs[reg + FP4_REGNUM + 4] = get_frame_base (frame_info);
- fp_loc = 8;
- }
- else
- {
- frame_saved_regs[reg + FP0_REGNUM + 4]
- = get_frame_base (frame_info) + fp_loc;
- fp_loc += 8;
- }
- }
-
- /* Quit if we hit any kind of branch the previous iteration. */
- if (final_iteration)
- break;
-
- /* We want to look precisely one instruction beyond the branch
- if we have not found everything yet. */
- if (is_branch (inst))
- final_iteration = 1;
-
- /* Bump the PC. */
- pc += 4;
- }
-}
-
-/* XXX - deprecated. This is a compatibility function for targets
- that do not yet implement DEPRECATED_FRAME_INIT_SAVED_REGS. */
-/* Find the addresses in which registers are saved in FRAME. */
-
-static void
-hppa_frame_init_saved_regs (struct frame_info *frame)
-{
- if (deprecated_get_frame_saved_regs (frame) == NULL)
- frame_saved_regs_zalloc (frame);
- hppa_frame_find_saved_regs (frame, deprecated_get_frame_saved_regs (frame));
-}
-
struct hppa_frame_cache
{
CORE_ADDR base;
/* We can leave the tail's space the same, since there's no jump. */
}
-/* Same as hppa32_store_return_value(), but for the PA64 ABI. */
-
-void
-hppa64_store_return_value (struct type *type, char *valbuf)
-{
- if (TYPE_CODE (type) == TYPE_CODE_FLT)
- deprecated_write_register_bytes
- (DEPRECATED_REGISTER_BYTE (FP4_REGNUM)
- + DEPRECATED_REGISTER_SIZE - TYPE_LENGTH (type),
- valbuf, TYPE_LENGTH (type));
- else if (is_integral_type(type))
- deprecated_write_register_bytes
- (DEPRECATED_REGISTER_BYTE (28)
- + DEPRECATED_REGISTER_SIZE - TYPE_LENGTH (type),
- valbuf, TYPE_LENGTH (type));
- else if (TYPE_LENGTH (type) <= 8)
- deprecated_write_register_bytes
- (DEPRECATED_REGISTER_BYTE (28),valbuf, TYPE_LENGTH (type));
- else if (TYPE_LENGTH (type) <= 16)
- {
- deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (28),valbuf, 8);
- deprecated_write_register_bytes
- (DEPRECATED_REGISTER_BYTE (29), valbuf + 8, TYPE_LENGTH (type) - 8);
- }
-}
-
-/* Same as hppa32_extract_return_value but for the PA64 ABI case. */
-
-void
-hppa64_extract_return_value (struct type *type, char *regbuf, char *valbuf)
-{
- /* RM: Floats are returned in FR4R, doubles in FR4.
- Integral values are in r28, padded on the left.
- Aggregates less that 65 bits are in r28, right padded.
- Aggregates upto 128 bits are in r28 and r29, right padded. */
- if (TYPE_CODE (type) == TYPE_CODE_FLT)
- memcpy (valbuf,
- regbuf + DEPRECATED_REGISTER_BYTE (FP4_REGNUM)
- + DEPRECATED_REGISTER_SIZE - TYPE_LENGTH (type),
- TYPE_LENGTH (type));
- else if (is_integral_type(type))
- memcpy (valbuf,
- regbuf + DEPRECATED_REGISTER_BYTE (28)
- + DEPRECATED_REGISTER_SIZE - TYPE_LENGTH (type),
- TYPE_LENGTH (type));
- else if (TYPE_LENGTH (type) <= 8)
- memcpy (valbuf, regbuf + DEPRECATED_REGISTER_BYTE (28),
- TYPE_LENGTH (type));
- else if (TYPE_LENGTH (type) <= 16)
- {
- memcpy (valbuf, regbuf + DEPRECATED_REGISTER_BYTE (28), 8);
- memcpy (valbuf + 8, regbuf + DEPRECATED_REGISTER_BYTE (29),
- TYPE_LENGTH (type) - 8);
- }
-}
-
int
hppa_reg_struct_has_addr (int gcc_p, struct type *type)
{
return (lhs > rhs);
}
-CORE_ADDR
-hppa64_stack_align (CORE_ADDR sp)
-{
- /* The PA64 ABI mandates a 16 byte stack alignment. */
- return ((sp % 16) ? (sp + 15) & -16 : sp);
-}
-
int
hppa_pc_requires_run_before_use (CORE_ADDR pc)
{
return builtin_type_double;
}
-/* Store the address of the place in which to copy the structure the
- subroutine will return. This is called from call_function. */
-
-void
-hppa_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
-{
- write_register (28, addr);
-}
/* Return True if REGNUM is not a register available to the user
through ptrace(). */
projects / binutils-gdb.git / commitdiff