/* Parameters for execution on any Hewlett-Packard PA-RISC machine.
- Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993
+ Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1995
Free Software Foundation, Inc.
Contributed by the Center for Software Science at the
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. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+/* Forward declarations of some types we use in prototypes */
+
+#ifdef __STDC__
+struct frame_info;
+struct frame_saved_regs;
+struct value;
+struct type;
+struct inferior_status;
+#endif
/* Target system byte order. */
#define TARGET_BYTE_ORDER BIG_ENDIAN
+/* By default assume we don't have to worry about software floating point. */
+#ifndef SOFT_FLOAT
+#define SOFT_FLOAT 0
+#endif
+
/* Get at various relevent fields of an instruction word. */
#define MASK_5 0x1f
/* 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)
+ ((X) >> (31 - (TO)) & ((1 << ((TO) - (FROM) + 1)) - 1))
/* Watch out for NaNs */
#define IEEE_FLOAT
-/* When passing a structure to a function, GCC passes the address
- in a register, not the structure itself. */
+/* 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) (1)
+#define REG_STRUCT_HAS_ADDR(gcc_p,type) \
+ (TYPE_LENGTH (type) > 8)
-/* Groan */
-
-#define ARGS_GROW_DOWN
+#define USE_STRUCT_CONVENTION(gcc_p,type) (TYPE_LENGTH (type) > 8)
/* Offset from address of function to start of its code.
Zero on most machines. */
/* Advance PC across any function entry prologue instructions
to reach some "real" code. */
-/* skip (stw rp, -20(0,sp)); copy 4,1; copy sp, 4; stwm 1,framesize(sp)
- for gcc, or (stw rp, -20(0,sp); stwm 1, framesize(sp) for hcc */
-
#define SKIP_PROLOGUE(pc) pc = skip_prologue (pc)
+extern CORE_ADDR skip_prologue PARAMS ((CORE_ADDR));
/* 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 some sort of a trampoline. */
+/* Return non-zero if we are in an appropriate trampoline. */
+
+#define IN_SOLIB_CALL_TRAMPOLINE(pc, name) \
+ in_solib_call_trampoline (pc, name)
+extern int in_solib_call_trampoline PARAMS ((CORE_ADDR, char *));
-#define IN_SOLIB_TRAMPOLINE(pc, name) skip_trampoline_code (pc, name)
+#define IN_SOLIB_RETURN_TRAMPOLINE(pc, name) \
+ in_solib_return_trampoline (pc, name)
+extern int in_solib_return_trampoline PARAMS ((CORE_ADDR, char *));
/* 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. */
-#define SAVED_PC_AFTER_CALL(frame) (read_register (RP_REGNUM) & ~3)
-
-/* Address of end of stack space. Who knows. */
-
-#define STACK_END_ADDR 0x80000000
+#undef SAVED_PC_AFTER_CALL
+#define SAVED_PC_AFTER_CALL(frame) saved_pc_after_call (frame)
+extern CORE_ADDR saved_pc_after_call PARAMS ((struct frame_info *));
/* Stack grows upward */
#define INNER_THAN >
-
/* Sequence of bytes for breakpoint instruction. */
-/*#define BREAKPOINT {0x00, 0x00, 0x00, 0x00}*/
-#ifdef KERNELDEBUG /* XXX */
-#define BREAKPOINT {0x00, 0x00, 0xa0, 0x00}
-#else
#define BREAKPOINT {0x00, 0x01, 0x00, 0x04}
-#endif
/* Amount PC must be decremented by after a breakpoint.
This is often the number of bytes in BREAKPOINT
#define ABOUT_TO_RETURN(pc) ((read_memory_integer (pc, 4) | 0x2) == 0xE840C002)
-/* Return 1 if P points to an invalid floating point value. */
-
-#define INVALID_FLOAT(p, len) 0 /* Just a first guess; not checked */
-
-/* Largest integer type */
-#define LONGEST long
-
-/* Name of the builtin type for the LONGEST type above. */
-#define BUILTIN_TYPE_LONGEST builtin_type_long
+/* 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. */
-/* Say how long (ordinary) registers are. */
-
-#define REGISTER_TYPE long
+#define REGISTER_SIZE 4
/* Number of machine registers */
-#define NUM_REGS 100
+#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", "arg3", "arg2", "arg1", "arg0", "dp", "ret0", "ret1", \
+ "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", \
- "fp4", "fp5", "fp6", "fp7", "fp8", \
- "fp9", "fp10", "fp11", "fp12", "fp13", "fp14", "fp15", \
- "fp16", "fp17", "fp18", "fp19", "fp20", "fp21", "fp22", "fp23", \
- "fp24", "fp25", "fp26", "fp27", "fp28", "fp29", "fp30", "fp31"}
+ "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,
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 R0_REGNUM 0 /* Doesn't actually exist, used as base for
+ other r registers. */
#define FLAGS_REGNUM 0 /* Various status flags */
#define RP_REGNUM 2 /* return pointer */
-#define FP_REGNUM 4 /* Contains address of executing stack */
+#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 SAR_REGNUM 32 /* Shift Amount Register */
+#define IPSW_REGNUM 41 /* Interrupt 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 EIEM_REGNUM 37 /* External Interrupt Enable Mask */
+#define IIR_REGNUM 38 /* Interrupt Instruction Register */
+#define IOR_REGNUM 40 /* Interrupt Offset Register */
+#define SR4_REGNUM 43 /* space register 4 */
+#define RCR_REGNUM 51 /* Recover Counter (also known as cr0) */
+#define CCR_REGNUM 54 /* Coprocessor Configuration Register */
+#define TR0_REGNUM 57 /* Temporary Registers (cr24 -> cr31) */
#define FP0_REGNUM 64 /* floating point reg. 0 */
#define FP4_REGNUM 72
#define PC_REGNUM PCOQ_HEAD_REGNUM
#define NPC_REGNUM PCOQ_TAIL_REGNUM
+/*
+ * Processor Status Word Masks
+ */
+
+#define PSW_T 0x01000000 /* Taken Branch Trap Enable */
+#define PSW_H 0x00800000 /* Higher-Privilege Transfer Trap Enable */
+#define PSW_L 0x00400000 /* Lower-Privilege Transfer Trap Enable */
+#define PSW_N 0x00200000 /* PC Queue Front Instruction Nullified */
+#define PSW_X 0x00100000 /* Data Memory Break Disable */
+#define PSW_B 0x00080000 /* Taken Branch in Previous Cycle */
+#define PSW_C 0x00040000 /* Code Address Translation Enable */
+#define PSW_V 0x00020000 /* Divide Step Correction */
+#define PSW_M 0x00010000 /* High-Priority Machine Check Disable */
+#define PSW_CB 0x0000ff00 /* Carry/Borrow Bits */
+#define PSW_R 0x00000010 /* Recovery Counter Enable */
+#define PSW_Q 0x00000008 /* Interruption State Collection Enable */
+#define PSW_P 0x00000004 /* Protection ID Validation Enable */
+#define PSW_D 0x00000002 /* Data Address Translation Enable */
+#define PSW_I 0x00000001 /* External, Power Failure, Low-Priority */
+ /* Machine Check Interruption Enable */
+
/* 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. */
of register dumps. */
#define DO_REGISTERS_INFO(_regnum, fp) pa_do_registers_info (_regnum, fp)
+extern void pa_do_registers_info PARAMS ((int, int));
/* PA specific macro to see if the current instruction is nullified. */
+#ifndef INSTRUCTION_NULLIFIED
#define INSTRUCTION_NULLIFIED ((int)read_register (IPSW_REGNUM) & 0x00200000)
+#endif
+
+/* 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 (32 * 4 + 11 * 4 + 8 * 4 + 12 * 4 + 4 + 32 * 8)
+#define REGISTER_BYTES (NUM_REGS * 4)
/* Index within `registers' of the first byte of the space for
register N. */
-#define REGISTER_BYTE(N) \
- ((N) >= FP4_REGNUM ? ((N) - FP4_REGNUM) * 8 + 288 : (N) * 4)
-
-/* Number of bytes of storage in the actual machine representation
- for register N. On the PA-RISC, all regs are 4 bytes
- except the floating point regs which are 8 bytes. */
-
-#define REGISTER_RAW_SIZE(N) ((N) < FP4_REGNUM ? 4 : 8)
+#define REGISTER_BYTE(N) (N) * 4
/* Number of bytes of storage in the program's representation
for register N. */
/* Largest value REGISTER_RAW_SIZE can have. */
-#define MAX_REGISTER_RAW_SIZE 8
+#define MAX_REGISTER_RAW_SIZE 4
/* 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) \
-{ memcpy ((TO), (FROM), (REGNUM) < FP4_REGNUM ? 4 : 8); }
-
-/* Convert data from virtual format for register REGNUM
- to raw format for register REGNUM. */
-
-#define REGISTER_CONVERT_TO_RAW(REGNUM, FROM, TO) \
-{ memcpy ((TO), (FROM), (REGNUM) < FP4_REGNUM ? 4 : 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_double)
+ ((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. */
/* 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. */
+ into VALBUF.
+
+ FIXME: Not sure what to do for soft float here. */
#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
- bcopy ((REGBUF) + REGISTER_BYTE(TYPE_LENGTH(TYPE) > 4 ? \
- FP4_REGNUM :28), VALBUF, TYPE_LENGTH (TYPE))
+ { \
+ if (TYPE_CODE (TYPE) == TYPE_CODE_FLT && !SOFT_FLOAT) \
+ memcpy ((VALBUF), \
+ ((char *)(REGBUF)) + REGISTER_BYTE (FP4_REGNUM), \
+ TYPE_LENGTH (TYPE)); \
+ else \
+ memcpy ((VALBUF), \
+ (char *)(REGBUF) + REGISTER_BYTE (28) + \
+ (TYPE_LENGTH (TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH (TYPE)), \
+ TYPE_LENGTH (TYPE)); \
+ }
/* Write into appropriate registers a function return value
- of type TYPE, given in virtual format. */
+ of type TYPE, given in virtual format.
+
+ For software floating point the return value goes into the integer
+ registers. But we don't have any flag to key this on, so we always
+ store the value into the integer registers, and if it's a float value,
+ then we put it in the float registers too. */
#define STORE_RETURN_VALUE(TYPE,VALBUF) \
- write_register_bytes (TYPE_LENGTH(TYPE) > 4 ? FP4_REGNUM :28, \
- VALBUF, TYPE_LENGTH (TYPE))
+ write_register_bytes (REGISTER_BYTE (28),(VALBUF), TYPE_LENGTH (TYPE)) ; \
+ if (!SOFT_FLOAT) \
+ write_register_bytes ((TYPE_CODE(TYPE) == TYPE_CODE_FLT \
+ ? 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))
+#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
+ (*(int *)((REGBUF) + REGISTER_BYTE (28)))
/*
* This macro defines the register numbers (from REGISTER_NAMES) that
((regno) > IPSW_REGNUM && (regno) < FP4_REGNUM)
#define INIT_EXTRA_FRAME_INFO(fromleaf, frame) init_extra_frame_info (fromleaf, frame)
+extern void init_extra_frame_info PARAMS ((int, struct frame_info *));
/* Describe the pointer in each stack frame to the previous stack frame
(its caller). */
address (previous FP). */
#define FRAME_CHAIN(thisframe) frame_chain (thisframe)
+extern CORE_ADDR frame_chain PARAMS ((struct frame_info *));
#define FRAME_CHAIN_VALID(chain, thisframe) \
frame_chain_valid (chain, thisframe)
+extern int frame_chain_valid PARAMS ((CORE_ADDR, struct frame_info *));
#define FRAME_CHAIN_COMBINE(chain, thisframe) (chain)
by FI does not have a frame on the stack associated with it. If it
does not, FRAMELESS is set to 1, else 0. */
#define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
- (FRAMELESS) = frameless_look_for_prologue(FI)
+ (FRAMELESS) = frameless_function_invocation(FI)
+extern int frameless_function_invocation PARAMS ((struct frame_info *));
#define FRAME_SAVED_PC(FRAME) frame_saved_pc (FRAME)
#define FRAME_ARGS_SKIP 0
-/* 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. */
-
-/* Deal with dummy functions later. */
-
-#define STW_P(INSN) (((INSN) & 0xfc000000) == 0x68000000)
-#define ADDIL_P(INSN) (((INSN) & 0xfc000000) == 0x28000000)
-#define LDO_P(INSN) (((INSN) & 0xfc00c000) == 0x34000000)
-
-#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
-{ register int regnum; \
- register CORE_ADDR next_addr; \
- register CORE_ADDR pc; \
- unsigned this_insn; \
- unsigned address; \
- \
- bzero (&frame_saved_regs, sizeof frame_saved_regs); \
- if ((frame_info->pc >= (frame_info)->frame \
- && (frame_info)->pc <= ((frame_info)->frame + CALL_DUMMY_LENGTH \
- + 32 * 4 + (NUM_REGS - FP0_REGNUM) * 8 \
- + 6 * 4))) \
- find_dummy_frame_regs ((frame_info), &(frame_saved_regs)); \
- else \
- { pc = get_pc_function_start ((frame_info)->pc); \
- if (read_memory_integer (pc, 4) == 0x6BC23FD9) \
- { (frame_saved_regs).regs[RP_REGNUM] = (frame_info)->frame - 20;\
- pc = pc + 4; \
- } \
- if (read_memory_integer (pc, 4) != 0x8040241) goto lose; \
- pc += 8; /* skip "copy 4,1; copy 30, 4" */ \
- /* skip either "stw 1,0(4);addil L'fsize,30;ldo R'fsize(1),30" \
- or "stwm 1,fsize(30)" */ \
- if ((read_memory_integer (pc, 4) & ~MASK_14) == 0x68810000) \
- pc += 12; \
- else \
- pc += 4; \
- while (1) \
- { this_insn = read_memory_integer(pc, 4); \
- if (STW_P (this_insn)) /* stw */ \
- { regnum = GET_FIELD (this_insn, 11, 15); \
- if (!regnum) goto lose; \
- (frame_saved_regs).regs[regnum] = (frame_info)->frame + \
- extract_14 (this_insn); \
- pc += 4; \
- } \
- else if (ADDIL_P (this_insn)) /* addil */ \
- { int next_insn; \
- next_insn = read_memory_integer(pc + 4, 4); \
- if (STW_P (next_insn)) /* stw */ \
- { regnum = GET_FIELD (this_insn, 6, 10); \
- if (!regnum) goto lose; \
- (frame_saved_regs).regs[regnum] = (frame_info)->frame +\
- (extract_21 (this_insn) << 11) + extract_14 (next_insn);\
- pc += 8; \
- } \
- else \
- break; \
- } \
- else \
- { pc += 4; \
- break; \
- } \
- } \
- this_insn = read_memory_integer (pc, 4); \
- if (LDO_P (this_insn)) \
- { next_addr = (frame_info)->frame + extract_14 (this_insn); \
- pc += 4; \
- } \
- else if (ADDIL_P (this_insn)) \
- { next_addr = (frame_info)->frame + (extract_21 (this_insn) << 11)\
- + extract_14 (read_memory_integer (pc + 4, 4)); \
- pc += 8; \
- } \
- while (1) \
- { this_insn = read_memory_integer (pc, 4); \
- if ((this_insn & 0xfc001fe0) == 0x2c001220) /* fstds,ma */ \
- { regnum = GET_FIELD (this_insn, 27, 31); \
- (frame_saved_regs).regs[regnum + FP0_REGNUM] = next_addr; \
- next_addr += 8; \
- pc += 4; \
- } \
- else \
- break; \
- } \
- lose: \
- (frame_saved_regs).regs[FP_REGNUM] = (frame_info)->frame; \
- (frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame -4; \
- }}
+#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
+ hppa_frame_find_saved_regs (frame_info, &frame_saved_regs)
+extern void
+hppa_frame_find_saved_regs PARAMS ((struct frame_info *,
+ struct frame_saved_regs *));
+
\f
/* 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 ()
+#define PUSH_DUMMY_FRAME push_dummy_frame (&inf_status)
+extern void push_dummy_frame PARAMS ((struct inferior_status *));
/* Discard from the stack the innermost frame,
restoring all saved registers. */
#define POP_FRAME hppa_pop_frame ()
+extern void hppa_pop_frame PARAMS ((void));
+
+#define INSTRUCTION_SIZE 4
+
+#ifndef PA_LEVEL_0
+
+/* Non-level zero PA's have space registers (but they don't always have
+ floating-point, do they???? */
/* This sequence of words is the instructions
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), r3
- ldil 0, r1 ; _sr4export will be placed here.
- ldo 0(r1), r1
- ldsid (0,r1), r19
- combt,=,n r3, r19, text_space ; If target is in data space, do a
+ ldil 0, r22 ; FUNC_LDIL_OFFSET must point here
+ ldo 0(r22), r22 ; FUNC_LDO_OFFSET must point here
+ ldsid (0,r22), r4
+ ldil 0, r1 ; SR4EXPORT_LDIL_OFFSET must point here
+ ldo 0(r1), r1 ; SR4EXPORT_LDO_OFFSET must point here
+ 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
ble,n 0(sr0, r22)
text_space ; Otherwise, go through _sr4export,
ble (sr4, r1) ; which will return back here.
- stw 31,-24(r30)
+ stw r31,-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
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. */
+ 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 offsets into the call dummy for the target function address */
+#define FUNC_LDIL_OFFSET (INSTRUCTION_SIZE * 9)
+#define FUNC_LDO_OFFSET (INSTRUCTION_SIZE * 10)
+
+/* Define offsets into the call dummy for the _sr4export address */
+#define SR4EXPORT_LDIL_OFFSET (INSTRUCTION_SIZE * 12)
+#define SR4EXPORT_LDO_OFFSET (INSTRUCTION_SIZE * 13)
#define CALL_DUMMY {0x4BDA3FB9, 0x4BD93FB1, 0x4BD83FA9, 0x4BD73FA1,\
0x37C13FB9, 0x24201004, 0x2C391005, 0x24311006,\
- 0x2C291007, 0x22C00000, 0x36D60000, 0x02C010A3,\
- 0x20200000, 0x34210000, 0x002010b3, 0x82632022,\
+ 0x2C291007, 0x22C00000, 0x36D60000, 0x02C010A4,\
+ 0x20200000, 0x34210000, 0x002010b4, 0x82842022,\
0xe6c06000, 0x081f0242, 0x00010004, 0x00151820,\
0xe6c00002, 0xe4202000, 0x6bdf3fd1, 0x00010004,\
- 0x00151820, 0xe6c00002}
+ 0x00151820, 0xe6c00002, 0x08000240, 0x08000240}
+
+#define CALL_DUMMY_LENGTH (INSTRUCTION_SIZE * 28)
+
+#else /* defined PA_LEVEL_0 */
+
+/* This is the call dummy for a level 0 PA. Level 0's don't have space
+ registers (or floating point??), so we skip all that inter-space call stuff,
+ and avoid touching the fp regs.
+
+call_dummy
+
+ ldw -36(%sp), %arg0
+ ldw -40(%sp), %arg1
+ ldw -44(%sp), %arg2
+ ldw -48(%sp), %arg3
+ ldil 0, %r31 ; FUNC_LDIL_OFFSET must point here
+ ldo 0(%r31), %r31 ; FUNC_LDO_OFFSET must point here
+ ble 0(%sr0, %r31)
+ copy %r31, %r2
+ break 4, 8
+ nop ; restore_pc_queue expects these
+ bv,n 0(%r22) ; instructions to be here...
+ nop
+*/
+
+/* Define offsets into the call dummy for the target function address */
+#define FUNC_LDIL_OFFSET (INSTRUCTION_SIZE * 4)
+#define FUNC_LDO_OFFSET (INSTRUCTION_SIZE * 5)
+
+#define CALL_DUMMY {0x4bda3fb9, 0x4bd93fb1, 0x4bd83fa9, 0x4bd73fa1,\
+ 0x23e00000, 0x37ff0000, 0xe7e00000, 0x081f0242,\
+ 0x00010004, 0x08000240, 0xeac0c002, 0x08000240}
+
+#define CALL_DUMMY_LENGTH (INSTRUCTION_SIZE * 12)
+
+#endif
-#define CALL_DUMMY_LENGTH 104
#define CALL_DUMMY_START_OFFSET 0
/*
#define FIX_CALL_DUMMY hppa_fix_call_dummy
-CORE_ADDR hppa_fix_call_dummy();
+extern CORE_ADDR
+hppa_fix_call_dummy PARAMS ((char *, CORE_ADDR, CORE_ADDR, int,
+ struct value **, struct type *, int));
#define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
sp = hppa_push_arguments(nargs, args, sp, struct_return, struct_addr)
-
-/* Symbol files have two symbol tables. Rather than do this right,
- like the ELF symbol reading code, massive hackery was added
- to dbxread.c and partial-stab.h. This flag turns on that
- hackery, which should all go away FIXME FIXME FIXME FIXME now. */
+extern CORE_ADDR
+hppa_push_arguments PARAMS ((int, struct value **, CORE_ADDR, int,
+ CORE_ADDR));
+\f
+/* 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
unsigned int Millicode : 1;
unsigned int Millicode_save_sr0 : 1;
unsigned int Region_description : 2;
- unsigned int reserverd1 : 1;
+ 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 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 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
};
#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));
+
+/* If the current gcc for for this target does not produce correct debugging
+ information for float parameters, both prototyped and unprototyped, then
+ define this macro. This forces gdb to always assume that floats are
+ passed as doubles and then converted in the callee.
+
+ For the pa, it appears that the debug info marks the parameters as
+ floats regardless of whether the function is prototyped, but the actual
+ values are passed as doubles for the non-prototyped case and floats for
+ the prototyped case. Thus we choose to make the non-prototyped case work
+ for C and break the prototyped case, since the non-prototyped case is
+ probably much more common. (FIXME). */
+
+#define COERCE_FLOAT_TO_DOUBLE (current_language -> la_language == language_c)
+
+#define STACK_ALIGN(ADDR) (((ADDR) + 7) & -8)