diff options
Diffstat (limited to 'gdb/mn10200-tdep.c')
| -rw-r--r-- | gdb/mn10200-tdep.c | 149 |
1 files changed, 75 insertions, 74 deletions
diff --git a/gdb/mn10200-tdep.c b/gdb/mn10200-tdep.c index 44188ba..f8637e8 100644 --- a/gdb/mn10200-tdep.c +++ b/gdb/mn10200-tdep.c @@ -1,21 +1,22 @@ /* Target-dependent code for the Matsushita MN10200 for GDB, the GNU debugger. Copyright 1997 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" @@ -28,7 +29,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "gdbcore.h" #include "symfile.h" - + /* Should call_function allocate stack space for a struct return? */ int mn10200_use_struct_convention (gcc_p, type) @@ -37,8 +38,6 @@ mn10200_use_struct_convention (gcc_p, type) { return (TYPE_NFIELDS (type) > 1 || TYPE_LENGTH (type) > 8); } - - /* *INDENT-OFF* */ /* The main purpose of this file is dealing with prologues to extract information about stack frames and saved registers. @@ -104,15 +103,18 @@ mn10200_use_struct_convention (gcc_p, type) frame chain to not bother trying to unwind past this frame. */ /* *INDENT-ON* */ + + + #define MY_FRAME_IN_SP 0x1 #define MY_FRAME_IN_FP 0x2 #define CALLER_A2_IN_A0 0x4 #define NO_MORE_FRAMES 0x8 - + static CORE_ADDR mn10200_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; @@ -137,7 +139,7 @@ mn10200_analyze_prologue (fi, pc) if (strcmp (name, "start") == 0) { if (fi) - fi->status = NO_MORE_FRAMES; + fi->status = NO_MORE_FRAMES; return pc; } @@ -204,14 +206,14 @@ mn10200_analyze_prologue (fi, pc) } /* Now see if we have a frame pointer. - + Search for mov a2,a0 (0xf278) - then mov a3,a2 (0xf27e). */ + then mov a3,a2 (0xf27e). */ if (buf[0] == 0xf2 && buf[1] == 0x78) { /* Our caller's $a2 will be found in $a0 now. Note it for - our callers. */ + our callers. */ if (fi) fi->status |= CALLER_A2_IN_A0; addr += 2; @@ -253,11 +255,11 @@ mn10200_analyze_prologue (fi, pc) } /* Next we should allocate the local frame. - + Search for add imm8,a3 (0xd3XX) - or add imm16,a3 (0xf70bXXXX) - or add imm24,a3 (0xf467XXXXXX). - + or add imm16,a3 (0xf70bXXXX) + or add imm24,a3 (0xf467XXXXXX). + If none of the above was found, then this prologue has no stack, and therefore can't have any register saves, so quit now. */ @@ -335,11 +337,11 @@ mn10200_analyze_prologue (fi, pc) status = target_read_memory (addr + 1, buf, 2); if (status != 0) { - if (fi && fi->next == NULL && (fi->status & MY_FRAME_IN_SP)) - fi->frame = read_sp (); + if (fi && fi->next == NULL && (fi->status & MY_FRAME_IN_SP)) + fi->frame = read_sp (); return addr; } - + /* Get the PC this instruction will branch to. */ temp = (extract_signed_integer (buf, 2) + addr + 3) & 0xffffff; @@ -347,8 +349,8 @@ mn10200_analyze_prologue (fi, pc) status = find_pc_partial_function (temp, &name, NULL, NULL); if (status == 0) { - if (fi && fi->next == NULL && (fi->status & MY_FRAME_IN_SP)) - fi->frame = read_sp (); + if (fi && fi->next == NULL && (fi->status & MY_FRAME_IN_SP)) + fi->frame = read_sp (); return addr; } @@ -376,11 +378,11 @@ mn10200_analyze_prologue (fi, pc) status = target_read_memory (addr + 2, buf, 3); if (status != 0) { - if (fi && fi->next == NULL && (fi->status & MY_FRAME_IN_SP)) - fi->frame = read_sp (); + if (fi && fi->next == NULL && (fi->status & MY_FRAME_IN_SP)) + fi->frame = read_sp (); return addr; } - + /* Get the PC this instruction will branch to. */ temp = (extract_signed_integer (buf, 3) + addr + 5) & 0xffffff; @@ -388,8 +390,8 @@ mn10200_analyze_prologue (fi, pc) status = find_pc_partial_function (temp, &name, NULL, NULL); if (status == 0) { - if (fi && fi->next == NULL && (fi->status & MY_FRAME_IN_SP)) - fi->frame = read_sp (); + if (fi && fi->next == NULL && (fi->status & MY_FRAME_IN_SP)) + fi->frame = read_sp (); return addr; } @@ -417,7 +419,7 @@ mn10200_analyze_prologue (fi, pc) int outgoing_args_size = 0; /* First adjust the stack size for this function. The out of - line prologue saves 4 registers (16bytes of data). */ + line prologue saves 4 registers (16bytes of data). */ if (fi) fi->stack_size -= 16; @@ -426,12 +428,12 @@ mn10200_analyze_prologue (fi, pc) fi->frame = read_sp () - fi->stack_size; /* After the out of line prologue, there may be another - stack adjustment for the outgoing arguments. + stack adjustment for the outgoing arguments. + + Search for add imm8,a3 (0xd3XX) + or add imm16,a3 (0xf70bXXXX) + or add imm24,a3 (0xf467XXXXXX). */ - Search for add imm8,a3 (0xd3XX) - or add imm16,a3 (0xf70bXXXX) - or add imm24,a3 (0xf467XXXXXX). */ - status = target_read_memory (addr, buf, 2); if (status != 0) { @@ -488,12 +490,12 @@ mn10200_analyze_prologue (fi, pc) outgoing_args_size = 0; /* Now that we know the size of the outgoing arguments, fix - fi->frame again if this is the innermost frame. */ + fi->frame again if this is the innermost frame. */ if (fi && fi->next == NULL) fi->frame -= outgoing_args_size; /* Note the register save information and update the stack - size for this frame too. */ + size for this frame too. */ if (fi) { fi->fsr.regs[2] = fi->frame + fi->stack_size + 4; @@ -519,12 +521,12 @@ mn10200_analyze_prologue (fi, pc) and thus the number of different instructions we need to check is greatly reduced because we know the displacements will be small. - + Search for movx d2,(X,a3) (0xf55eXX) - then movx d3,(X,a3) (0xf55fXX) - then mov a1,(X,a3) (0x5dXX) No frame pointer case - then mov a2,(X,a3) (0x5eXX) No frame pointer case - or mov a0,(X,a3) (0x5cXX) Frame pointer case. */ + then movx d3,(X,a3) (0xf55fXX) + then mov a1,(X,a3) (0x5dXX) No frame pointer case + then mov a2,(X,a3) (0x5eXX) No frame pointer case + or mov a0,(X,a3) (0x5cXX) Frame pointer case. */ status = target_read_memory (addr, buf, 2); if (status != 0) @@ -598,7 +600,7 @@ mn10200_analyze_prologue (fi, pc) } return addr; } - + /* Function: frame_chain Figure out and return the caller's frame pointer given current frame_info struct. @@ -615,7 +617,7 @@ mn10200_frame_chain (fi) /* Walk through the prologue to determine the stack size, location of saved registers, end of the prologue, etc. */ if (fi->status == 0) - mn10200_analyze_prologue (fi, (CORE_ADDR)0); + mn10200_analyze_prologue (fi, (CORE_ADDR) 0); /* Quit now if mn10200_analyze_prologue set NO_MORE_FRAMES. */ if (fi->status & NO_MORE_FRAMES) @@ -624,19 +626,19 @@ mn10200_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 $a2 to our function. + If our caller has a frame pointer, then we need to + find the entry value of $a2 to our function. - If CALLER_A2_IN_A0, then the chain is in $a0. + If CALLER_A2_IN_A0, then the chain is in $a0. - If fsr.regs[6] is nonzero, then it's at the memory - location pointed to by fsr.regs[6]. + If fsr.regs[6] is nonzero, then it's at the memory + location pointed to by fsr.regs[6]. - Else it's still in $a2. + Else it's still in $a2. + + If our caller does not have a frame pointer, then his + frame base is fi->frame + -caller's stack size + 4. */ - If our caller does not have a frame pointer, then his - frame base is fi->frame + -caller's stack size + 4. */ - /* The easiest way to get that info is to analyze our caller's frame. So we set up a dummy frame and call mn10200_analyze_prologue to @@ -651,7 +653,7 @@ mn10200_frame_chain (fi) if (dummy_frame.status & MY_FRAME_IN_FP) { /* Our caller has a frame pointer. So find the frame in $a2, $a0, - or in the stack. */ + or in the stack. */ if (fi->fsr.regs[6]) return (read_memory_integer (fi->fsr.regs[FP_REGNUM], REGISTER_SIZE) & 0xffffff); @@ -663,7 +665,7 @@ mn10200_frame_chain (fi) else { /* Our caller does not have a frame pointer. So his frame starts - at the base of our frame (fi->frame) + <his size> + 4 (saved pc). */ + at the base of our frame (fi->frame) + <his size> + 4 (saved pc). */ return fi->frame + -dummy_frame.stack_size + 4; } } @@ -690,7 +692,7 @@ mn10200_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 { @@ -703,7 +705,7 @@ mn10200_pop_frame (frame) ULONGEST value; value = read_memory_unsigned_integer (frame->fsr.regs[regnum], - REGISTER_RAW_SIZE (regnum)); + REGISTER_RAW_SIZE (regnum)); write_register (regnum, value); } @@ -747,16 +749,16 @@ mn10200_push_arguments (nargs, args, sp, struct_return, struct_addr) int arg_length = (TYPE_LENGTH (VALUE_TYPE (args[argnum])) + 1) & ~1; /* If we've used all argument registers, then this argument is - pushed. */ + pushed. */ if (regsused >= 2 || arg_length > 4) { regsused = 2; len += arg_length; } /* We know we've got some arg register space left. If this argument - will fit entirely in regs, then put it there. */ + will fit entirely in regs, then put it there. */ else if (arg_length <= 2 - || TYPE_CODE (VALUE_TYPE (args[argnum])) == TYPE_CODE_PTR) + || TYPE_CODE (VALUE_TYPE (args[argnum])) == TYPE_CODE_PTR) { regsused++; } @@ -786,13 +788,13 @@ mn10200_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); } if (regsused < 2 @@ -829,7 +831,7 @@ mn10200_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 mn10200_push_return_address (pc, sp) CORE_ADDR pc; @@ -845,7 +847,7 @@ mn10200_push_return_address (pc, sp) /* Function: store_struct_return (addr,sp) Store the structure value return address for an inferior function call. */ - + CORE_ADDR mn10200_store_struct_return (addr, sp) CORE_ADDR addr; @@ -855,7 +857,7 @@ mn10200_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 @@ -904,4 +906,3 @@ _initialize_mn10200_tdep () { tm_print_insn = print_insn_mn10200; } - |