diff options
Diffstat (limited to 'gdb/mn10300-tdep.c')
| -rw-r--r-- | gdb/mn10300-tdep.c | 171 |
1 files changed, 86 insertions, 85 deletions
diff --git a/gdb/mn10300-tdep.c b/gdb/mn10300-tdep.c index c758d77..9f54e0d 100644 --- a/gdb/mn10300-tdep.c +++ b/gdb/mn10300-tdep.c @@ -1,21 +1,22 @@ /* Target-dependent code for the Matsushita MN10300 for GDB, the GNU debugger. Copyright 1996, 1997, 1998 Free Software Foundation, Inc. -This file is part of GDB. + This file is part of GDB. -This program is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2 of the License, or -(at your option) any later version. + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. -You should have received a copy of the GNU General Public License -along with this program; if not, write to the Free Software -Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ #include "defs.h" #include "frame.h" @@ -28,23 +29,23 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "gdbcore.h" #include "symfile.h" -static CORE_ADDR mn10300_analyze_prologue PARAMS ((struct frame_info *fi, - CORE_ADDR pc)); +static CORE_ADDR mn10300_analyze_prologue PARAMS ((struct frame_info * fi, + CORE_ADDR pc)); /* Additional info used by the frame */ struct frame_extra_info -{ - int status; - int stack_size; -}; + { + int status; + int stack_size; + }; -static char *mn10300_generic_register_names[] = -{ "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3", - "sp", "pc", "mdr", "psw", "lir", "lar", "", "", - "", "", "", "", "", "", "", "", - "", "", "", "", "", "", "", "fp" }; +static char *mn10300_generic_register_names[] = +{"d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3", + "sp", "pc", "mdr", "psw", "lir", "lar", "", "", + "", "", "", "", "", "", "", "", + "", "", "", "", "", "", "", "fp"}; static char **mn10300_register_names = mn10300_generic_register_names; @@ -145,7 +146,8 @@ mn10300_breakpoint_from_pc (bp_addr, bp_size) CORE_ADDR *bp_addr; int *bp_size; { - static char breakpoint[] = {0xff}; + static char breakpoint[] = + {0xff}; *bp_size = 1; return breakpoint; } @@ -156,8 +158,8 @@ mn10300_breakpoint_from_pc (bp_addr, bp_size) static void fix_frame_pointer (fi, stack_size) - struct frame_info *fi; - int stack_size; + struct frame_info *fi; + int stack_size; { if (fi && fi->next == NULL) { @@ -174,8 +176,8 @@ fix_frame_pointer (fi, stack_size) static void set_movm_offsets (fi, movm_args) - struct frame_info *fi; - int movm_args; + struct frame_info *fi; + int movm_args; { int offset = 0; @@ -210,53 +212,53 @@ set_movm_offsets (fi, movm_args) For reference here's how prologues look on the mn10300: - With frame pointer: - movm [d2,d3,a2,a3],sp - mov sp,a3 - add <size>,sp + With frame pointer: + movm [d2,d3,a2,a3],sp + mov sp,a3 + add <size>,sp - Without frame pointer: - movm [d2,d3,a2,a3],sp (if needed) - add <size>,sp + Without frame pointer: + movm [d2,d3,a2,a3],sp (if needed) + add <size>,sp One day we might keep the stack pointer constant, that won't change the code for prologues, but it will make the frame pointerless case much more common. */ - + /* Analyze the prologue to determine where registers are saved, the end of the prologue, etc etc. Return the end of the prologue scanned. We store into FI (if non-null) several tidbits of information: - * stack_size -- size of this stack frame. Note that if we stop in - certain parts of the prologue/epilogue we may claim the size of the - current frame is zero. This happens when the current frame has - not been allocated yet or has already been deallocated. + * stack_size -- size of this stack frame. Note that if we stop in + certain parts of the prologue/epilogue we may claim the size of the + current frame is zero. This happens when the current frame has + not been allocated yet or has already been deallocated. - * fsr -- Addresses of registers saved in the stack by this frame. + * fsr -- Addresses of registers saved in the stack by this frame. - * status -- A (relatively) generic status indicator. It's a bitmask - with the following bits: + * status -- A (relatively) generic status indicator. It's a bitmask + with the following bits: - MY_FRAME_IN_SP: The base of the current frame is actually in - the stack pointer. This can happen for frame pointerless - functions, or cases where we're stopped in the prologue/epilogue - itself. For these cases mn10300_analyze_prologue will need up - update fi->frame before returning or analyzing the register - save instructions. + MY_FRAME_IN_SP: The base of the current frame is actually in + the stack pointer. This can happen for frame pointerless + functions, or cases where we're stopped in the prologue/epilogue + itself. For these cases mn10300_analyze_prologue will need up + update fi->frame before returning or analyzing the register + save instructions. - MY_FRAME_IN_FP: The base of the current frame is in the - frame pointer register ($a2). + MY_FRAME_IN_FP: The base of the current frame is in the + frame pointer register ($a2). - NO_MORE_FRAMES: Set this if the current frame is "start" or - if the first instruction looks like mov <imm>,sp. This tells - frame chain to not bother trying to unwind past this frame. */ + NO_MORE_FRAMES: Set this if the current frame is "start" or + if the first instruction looks like mov <imm>,sp. This tells + frame chain to not bother trying to unwind past this frame. */ static CORE_ADDR mn10300_analyze_prologue (fi, pc) - struct frame_info *fi; - CORE_ADDR pc; + struct frame_info *fi; + CORE_ADDR pc; { CORE_ADDR func_addr, func_end, addr, stop; CORE_ADDR stack_size; @@ -418,14 +420,14 @@ mn10300_analyze_prologue (fi, pc) return addr; } } - + /* Next we should allocate the local frame. No more prologue insns are found after allocating the local frame. - + Search for add imm8,sp (0xf8feXX) - or add imm16,sp (0xfafeXXXX) - or add imm32,sp (0xfcfeXXXXXXXX). - + or add imm16,sp (0xfafeXXXX) + or add imm32,sp (0xfcfeXXXXXXXX). + If none of the above was found, then this prologue has no additional stack. */ @@ -489,7 +491,7 @@ mn10300_analyze_prologue (fi, pc) set_movm_offsets (fi, movm_args); return addr; } - + /* Function: frame_chain Figure out and return the caller's frame pointer given current frame_info struct. @@ -505,7 +507,7 @@ mn10300_frame_chain (fi) /* Walk through the prologue to determine the stack size, location of saved registers, end of the prologue, etc. */ if (fi->extra_info->status == 0) - mn10300_analyze_prologue (fi, (CORE_ADDR)0); + mn10300_analyze_prologue (fi, (CORE_ADDR) 0); /* Quit now if mn10300_analyze_prologue set NO_MORE_FRAMES. */ if (fi->extra_info->status & NO_MORE_FRAMES) @@ -514,17 +516,17 @@ mn10300_frame_chain (fi) /* Now that we've analyzed our prologue, determine the frame pointer for our caller. - If our caller has a frame pointer, then we need to - find the entry value of $a3 to our function. + If our caller has a frame pointer, then we need to + find the entry value of $a3 to our function. + + If fsr.regs[A3_REGNUM] is nonzero, then it's at the memory + location pointed to by fsr.regs[A3_REGNUM]. - If fsr.regs[A3_REGNUM] is nonzero, then it's at the memory - location pointed to by fsr.regs[A3_REGNUM]. + Else it's still in $a3. - Else it's still in $a3. + If our caller does not have a frame pointer, then his + frame base is fi->frame + -caller's stack size. */ - If our caller does not have a frame pointer, then his - frame base is fi->frame + -caller's stack size. */ - /* The easiest way to get that info is to analyze our caller's frame. So we set up a dummy frame and call mn10300_analyze_prologue to find stuff for us. */ @@ -549,8 +551,8 @@ mn10300_frame_chain (fi) adjust += (fi->saved_regs[A3_REGNUM] ? 4 : 0); /* Our caller does not have a frame pointer. So his frame starts - at the base of our frame (fi->frame) + register save space - + <his size>. */ + at the base of our frame (fi->frame) + register save space + + <his size>. */ return fi->frame + adjust + -dummy->extra_info->stack_size; } } @@ -578,7 +580,7 @@ mn10300_pop_frame (frame) { int regnum; - if (PC_IN_CALL_DUMMY(frame->pc, frame->frame, frame->frame)) + if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame)) generic_pop_dummy_frame (); else { @@ -591,7 +593,7 @@ mn10300_pop_frame (frame) ULONGEST value; value = read_memory_unsigned_integer (frame->saved_regs[regnum], - REGISTER_RAW_SIZE (regnum)); + REGISTER_RAW_SIZE (regnum)); write_register (regnum, value); } @@ -657,13 +659,13 @@ mn10300_push_arguments (nargs, args, sp, struct_return, struct_addr) && TYPE_LENGTH (VALUE_TYPE (*args)) > 8) { /* XXX Wrong, we want a pointer to this argument. */ - len = TYPE_LENGTH (VALUE_TYPE (*args)); - val = (char *)VALUE_CONTENTS (*args); + len = TYPE_LENGTH (VALUE_TYPE (*args)); + val = (char *) VALUE_CONTENTS (*args); } else { len = TYPE_LENGTH (VALUE_TYPE (*args)); - val = (char *)VALUE_CONTENTS (*args); + val = (char *) VALUE_CONTENTS (*args); } while (regsused < 2 && len > 0) @@ -693,7 +695,7 @@ mn10300_push_arguments (nargs, args, sp, struct_return, struct_addr) /* Function: push_return_address (pc) Set up the return address for the inferior function call. Needed for targets where we don't actually execute a JSR/BSR instruction */ - + CORE_ADDR mn10300_push_return_address (pc, sp) CORE_ADDR pc; @@ -709,7 +711,7 @@ mn10300_push_return_address (pc, sp) /* Function: store_struct_return (addr,sp) Store the structure value return address for an inferior function call. */ - + CORE_ADDR mn10300_store_struct_return (addr, sp) CORE_ADDR addr; @@ -719,7 +721,7 @@ mn10300_store_struct_return (addr, sp) write_register (0, addr); return sp; } - + /* Function: frame_saved_pc Find the caller of this frame. We do this by seeing if RP_REGNUM is saved in the stack anywhere, otherwise we get it from the @@ -789,16 +791,16 @@ mn10300_virtual_frame_pointer (pc, reg, offset) /* Results will tell us which type of frame it uses. */ if (dummy->extra_info->status & MY_FRAME_IN_SP) { - *reg = SP_REGNUM; + *reg = SP_REGNUM; *offset = -(dummy->extra_info->stack_size); } else { - *reg = A3_REGNUM; + *reg = A3_REGNUM; *offset = 0; } } - + /* This can be made more generic later. */ static void set_machine_hook (filename) @@ -823,4 +825,3 @@ _initialize_mn10300_tdep () specify_exec_file_hook (set_machine_hook); } - |