| // OBSOLETE /* Target-dependent code for the Matsushita MN10200 for GDB, the GNU debugger. |
| // OBSOLETE |
| // OBSOLETE Copyright 1997, 1998, 1999, 2000, 2001, 2003 Free Software |
| // OBSOLETE Foundation, Inc. |
| // OBSOLETE |
| // OBSOLETE This file is part of GDB. |
| // OBSOLETE |
| // OBSOLETE This program is free software; you can redistribute it and/or modify |
| // OBSOLETE it under the terms of the GNU General Public License as published by |
| // OBSOLETE the Free Software Foundation; either version 2 of the License, or |
| // OBSOLETE (at your option) any later version. |
| // OBSOLETE |
| // OBSOLETE This program is distributed in the hope that it will be useful, |
| // OBSOLETE but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // OBSOLETE MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // OBSOLETE GNU General Public License for more details. |
| // OBSOLETE |
| // OBSOLETE You should have received a copy of the GNU General Public License |
| // OBSOLETE along with this program; if not, write to the Free Software |
| // OBSOLETE Foundation, Inc., 59 Temple Place - Suite 330, |
| // OBSOLETE Boston, MA 02111-1307, USA. */ |
| // OBSOLETE |
| // OBSOLETE #include "defs.h" |
| // OBSOLETE #include "frame.h" |
| // OBSOLETE #include "inferior.h" |
| // OBSOLETE #include "target.h" |
| // OBSOLETE #include "value.h" |
| // OBSOLETE #include "bfd.h" |
| // OBSOLETE #include "gdb_string.h" |
| // OBSOLETE #include "gdbcore.h" |
| // OBSOLETE #include "symfile.h" |
| // OBSOLETE #include "regcache.h" |
| // OBSOLETE |
| // OBSOLETE |
| // OBSOLETE /* Should call_function allocate stack space for a struct return? */ |
| // OBSOLETE int |
| // OBSOLETE mn10200_use_struct_convention (int gcc_p, struct type *type) |
| // OBSOLETE { |
| // OBSOLETE return (TYPE_NFIELDS (type) > 1 || TYPE_LENGTH (type) > 8); |
| // OBSOLETE } |
| // OBSOLETE /* *INDENT-OFF* */ |
| // OBSOLETE /* The main purpose of this file is dealing with prologues to extract |
| // OBSOLETE information about stack frames and saved registers. |
| // OBSOLETE |
| // OBSOLETE For reference here's how prologues look on the mn10200: |
| // OBSOLETE |
| // OBSOLETE With frame pointer: |
| // OBSOLETE mov fp,a0 |
| // OBSOLETE mov sp,fp |
| // OBSOLETE add <size>,sp |
| // OBSOLETE Register saves for d2, d3, a1, a2 as needed. Saves start |
| // OBSOLETE at fp - <size> + <outgoing_args_size> and work towards higher |
| // OBSOLETE addresses. Note that the saves are actually done off the stack |
| // OBSOLETE pointer in the prologue! This makes for smaller code and easier |
| // OBSOLETE prologue scanning as the displacement fields will unlikely |
| // OBSOLETE be more than 8 bits! |
| // OBSOLETE |
| // OBSOLETE Without frame pointer: |
| // OBSOLETE add <size>,sp |
| // OBSOLETE Register saves for d2, d3, a1, a2 as needed. Saves start |
| // OBSOLETE at sp + <outgoing_args_size> and work towards higher addresses. |
| // OBSOLETE |
| // OBSOLETE Out of line prologue: |
| // OBSOLETE add <local size>,sp -- optional |
| // OBSOLETE jsr __prologue |
| // OBSOLETE add <outgoing_size>,sp -- optional |
| // OBSOLETE |
| // OBSOLETE The stack pointer remains constant throughout the life of most |
| // OBSOLETE functions. As a result the compiler will usually omit the |
| // OBSOLETE frame pointer, so we must handle frame pointerless functions. */ |
| // OBSOLETE |
| // OBSOLETE /* Analyze the prologue to determine where registers are saved, |
| // OBSOLETE the end of the prologue, etc etc. Return the end of the prologue |
| // OBSOLETE scanned. |
| // OBSOLETE |
| // OBSOLETE We store into FI (if non-null) several tidbits of information: |
| // OBSOLETE |
| // OBSOLETE * stack_size -- size of this stack frame. Note that if we stop in |
| // OBSOLETE certain parts of the prologue/epilogue we may claim the size of the |
| // OBSOLETE current frame is zero. This happens when the current frame has |
| // OBSOLETE not been allocated yet or has already been deallocated. |
| // OBSOLETE |
| // OBSOLETE * fsr -- Addresses of registers saved in the stack by this frame. |
| // OBSOLETE |
| // OBSOLETE * status -- A (relatively) generic status indicator. It's a bitmask |
| // OBSOLETE with the following bits: |
| // OBSOLETE |
| // OBSOLETE MY_FRAME_IN_SP: The base of the current frame is actually in |
| // OBSOLETE the stack pointer. This can happen for frame pointerless |
| // OBSOLETE functions, or cases where we're stopped in the prologue/epilogue |
| // OBSOLETE itself. For these cases mn10200_analyze_prologue will need up |
| // OBSOLETE update fi->frame before returning or analyzing the register |
| // OBSOLETE save instructions. |
| // OBSOLETE |
| // OBSOLETE MY_FRAME_IN_FP: The base of the current frame is in the |
| // OBSOLETE frame pointer register ($a2). |
| // OBSOLETE |
| // OBSOLETE CALLER_A2_IN_A0: $a2 from the caller's frame is temporarily |
| // OBSOLETE in $a0. This can happen if we're stopped in the prologue. |
| // OBSOLETE |
| // OBSOLETE NO_MORE_FRAMES: Set this if the current frame is "start" or |
| // OBSOLETE if the first instruction looks like mov <imm>,sp. This tells |
| // OBSOLETE frame chain to not bother trying to unwind past this frame. */ |
| // OBSOLETE /* *INDENT-ON* */ |
| // OBSOLETE |
| // OBSOLETE |
| // OBSOLETE |
| // OBSOLETE |
| // OBSOLETE #define MY_FRAME_IN_SP 0x1 |
| // OBSOLETE #define MY_FRAME_IN_FP 0x2 |
| // OBSOLETE #define CALLER_A2_IN_A0 0x4 |
| // OBSOLETE #define NO_MORE_FRAMES 0x8 |
| // OBSOLETE |
| // OBSOLETE static CORE_ADDR |
| // OBSOLETE mn10200_analyze_prologue (struct frame_info *fi, CORE_ADDR pc) |
| // OBSOLETE { |
| // OBSOLETE CORE_ADDR func_addr, func_end, addr, stop; |
| // OBSOLETE CORE_ADDR stack_size = 0; |
| // OBSOLETE unsigned char buf[4]; |
| // OBSOLETE int status; |
| // OBSOLETE char *name; |
| // OBSOLETE int out_of_line_prologue = 0; |
| // OBSOLETE |
| // OBSOLETE /* Use the PC in the frame if it's provided to look up the |
| // OBSOLETE start of this function. */ |
| // OBSOLETE pc = (fi ? get_frame_pc (fi) : pc); |
| // OBSOLETE |
| // OBSOLETE /* Find the start of this function. */ |
| // OBSOLETE status = find_pc_partial_function (pc, &name, &func_addr, &func_end); |
| // OBSOLETE |
| // OBSOLETE /* Do nothing if we couldn't find the start of this function or if we're |
| // OBSOLETE stopped at the first instruction in the prologue. */ |
| // OBSOLETE if (status == 0) |
| // OBSOLETE return pc; |
| // OBSOLETE |
| // OBSOLETE /* If we're in start, then give up. */ |
| // OBSOLETE if (strcmp (name, "start") == 0) |
| // OBSOLETE { |
| // OBSOLETE if (fi) |
| // OBSOLETE fi->status = NO_MORE_FRAMES; |
| // OBSOLETE return pc; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* At the start of a function our frame is in the stack pointer. */ |
| // OBSOLETE if (fi) |
| // OBSOLETE fi->status = MY_FRAME_IN_SP; |
| // OBSOLETE |
| // OBSOLETE /* If we're physically on an RTS instruction, then our frame has already |
| // OBSOLETE been deallocated. |
| // OBSOLETE |
| // OBSOLETE fi->frame is bogus, we need to fix it. */ |
| // OBSOLETE if (fi && get_frame_pc (fi) + 1 == func_end) |
| // OBSOLETE { |
| // OBSOLETE status = target_read_memory (get_frame_pc (fi), buf, 1); |
| // OBSOLETE if (status != 0) |
| // OBSOLETE { |
| // OBSOLETE if (get_next_frame (fi) == NULL) |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| // OBSOLETE return get_frame_pc (fi); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE if (buf[0] == 0xfe) |
| // OBSOLETE { |
| // OBSOLETE if (get_next_frame (fi) == NULL) |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| // OBSOLETE return get_frame_pc (fi); |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Similarly if we're stopped on the first insn of a prologue as our |
| // OBSOLETE frame hasn't been allocated yet. */ |
| // OBSOLETE if (fi && get_frame_pc (fi) == func_addr) |
| // OBSOLETE { |
| // OBSOLETE if (get_next_frame (fi) == NULL) |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| // OBSOLETE return get_frame_pc (fi); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Figure out where to stop scanning. */ |
| // OBSOLETE stop = fi ? get_frame_pc (fi) : func_end; |
| // OBSOLETE |
| // OBSOLETE /* Don't walk off the end of the function. */ |
| // OBSOLETE stop = stop > func_end ? func_end : stop; |
| // OBSOLETE |
| // OBSOLETE /* Start scanning on the first instruction of this function. */ |
| // OBSOLETE addr = func_addr; |
| // OBSOLETE |
| // OBSOLETE status = target_read_memory (addr, buf, 2); |
| // OBSOLETE if (status != 0) |
| // OBSOLETE { |
| // OBSOLETE if (fi && get_next_frame (fi) == NULL && fi->status & MY_FRAME_IN_SP) |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* First see if this insn sets the stack pointer; if so, it's something |
| // OBSOLETE we won't understand, so quit now. */ |
| // OBSOLETE if (buf[0] == 0xdf |
| // OBSOLETE || (buf[0] == 0xf4 && buf[1] == 0x77)) |
| // OBSOLETE { |
| // OBSOLETE if (fi) |
| // OBSOLETE fi->status = NO_MORE_FRAMES; |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Now see if we have a frame pointer. |
| // OBSOLETE |
| // OBSOLETE Search for mov a2,a0 (0xf278) |
| // OBSOLETE then mov a3,a2 (0xf27e). */ |
| // OBSOLETE |
| // OBSOLETE if (buf[0] == 0xf2 && buf[1] == 0x78) |
| // OBSOLETE { |
| // OBSOLETE /* Our caller's $a2 will be found in $a0 now. Note it for |
| // OBSOLETE our callers. */ |
| // OBSOLETE if (fi) |
| // OBSOLETE fi->status |= CALLER_A2_IN_A0; |
| // OBSOLETE addr += 2; |
| // OBSOLETE if (addr >= stop) |
| // OBSOLETE { |
| // OBSOLETE /* We still haven't allocated our local stack. Handle this |
| // OBSOLETE as if we stopped on the first or last insn of a function. */ |
| // OBSOLETE if (fi && get_next_frame (fi) == NULL) |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE status = target_read_memory (addr, buf, 2); |
| // OBSOLETE if (status != 0) |
| // OBSOLETE { |
| // OBSOLETE if (fi && get_next_frame (fi) == NULL) |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE if (buf[0] == 0xf2 && buf[1] == 0x7e) |
| // OBSOLETE { |
| // OBSOLETE addr += 2; |
| // OBSOLETE |
| // OBSOLETE /* Our frame pointer is valid now. */ |
| // OBSOLETE if (fi) |
| // OBSOLETE { |
| // OBSOLETE fi->status |= MY_FRAME_IN_FP; |
| // OBSOLETE fi->status &= ~MY_FRAME_IN_SP; |
| // OBSOLETE } |
| // OBSOLETE if (addr >= stop) |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE else |
| // OBSOLETE { |
| // OBSOLETE if (fi && get_next_frame (fi) == NULL) |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Next we should allocate the local frame. |
| // OBSOLETE |
| // OBSOLETE Search for add imm8,a3 (0xd3XX) |
| // OBSOLETE or add imm16,a3 (0xf70bXXXX) |
| // OBSOLETE or add imm24,a3 (0xf467XXXXXX). |
| // OBSOLETE |
| // OBSOLETE If none of the above was found, then this prologue has |
| // OBSOLETE no stack, and therefore can't have any register saves, |
| // OBSOLETE so quit now. */ |
| // OBSOLETE status = target_read_memory (addr, buf, 2); |
| // OBSOLETE if (status != 0) |
| // OBSOLETE { |
| // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE if (buf[0] == 0xd3) |
| // OBSOLETE { |
| // OBSOLETE stack_size = extract_signed_integer (&buf[1], 1); |
| // OBSOLETE if (fi) |
| // OBSOLETE fi->stack_size = stack_size; |
| // OBSOLETE addr += 2; |
| // OBSOLETE if (addr >= stop) |
| // OBSOLETE { |
| // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - stack_size); |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE else if (buf[0] == 0xf7 && buf[1] == 0x0b) |
| // OBSOLETE { |
| // OBSOLETE status = target_read_memory (addr + 2, buf, 2); |
| // OBSOLETE if (status != 0) |
| // OBSOLETE { |
| // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE stack_size = extract_signed_integer (buf, 2); |
| // OBSOLETE if (fi) |
| // OBSOLETE fi->stack_size = stack_size; |
| // OBSOLETE addr += 4; |
| // OBSOLETE if (addr >= stop) |
| // OBSOLETE { |
| // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - stack_size); |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE else if (buf[0] == 0xf4 && buf[1] == 0x67) |
| // OBSOLETE { |
| // OBSOLETE status = target_read_memory (addr + 2, buf, 3); |
| // OBSOLETE if (status != 0) |
| // OBSOLETE { |
| // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE stack_size = extract_signed_integer (buf, 3); |
| // OBSOLETE if (fi) |
| // OBSOLETE fi->stack_size = stack_size; |
| // OBSOLETE addr += 5; |
| // OBSOLETE if (addr >= stop) |
| // OBSOLETE { |
| // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - stack_size); |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Now see if we have a call to __prologue for an out of line |
| // OBSOLETE prologue. */ |
| // OBSOLETE status = target_read_memory (addr, buf, 2); |
| // OBSOLETE if (status != 0) |
| // OBSOLETE return addr; |
| // OBSOLETE |
| // OBSOLETE /* First check for 16bit pc-relative call to __prologue. */ |
| // OBSOLETE if (buf[0] == 0xfd) |
| // OBSOLETE { |
| // OBSOLETE CORE_ADDR temp; |
| // OBSOLETE status = target_read_memory (addr + 1, buf, 2); |
| // OBSOLETE if (status != 0) |
| // OBSOLETE { |
| // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Get the PC this instruction will branch to. */ |
| // OBSOLETE temp = (extract_signed_integer (buf, 2) + addr + 3) & 0xffffff; |
| // OBSOLETE |
| // OBSOLETE /* Get the name of the function at the target address. */ |
| // OBSOLETE status = find_pc_partial_function (temp, &name, NULL, NULL); |
| // OBSOLETE if (status == 0) |
| // OBSOLETE { |
| // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Note if it is an out of line prologue. */ |
| // OBSOLETE out_of_line_prologue = (strcmp (name, "__prologue") == 0); |
| // OBSOLETE |
| // OBSOLETE /* This sucks up 3 bytes of instruction space. */ |
| // OBSOLETE if (out_of_line_prologue) |
| // OBSOLETE addr += 3; |
| // OBSOLETE |
| // OBSOLETE if (addr >= stop) |
| // OBSOLETE { |
| // OBSOLETE if (fi && get_next_frame (fi) == NULL) |
| // OBSOLETE { |
| // OBSOLETE fi->stack_size -= 16; |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - fi->stack_size); |
| // OBSOLETE } |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE /* Now check for the 24bit pc-relative call to __prologue. */ |
| // OBSOLETE else if (buf[0] == 0xf4 && buf[1] == 0xe1) |
| // OBSOLETE { |
| // OBSOLETE CORE_ADDR temp; |
| // OBSOLETE status = target_read_memory (addr + 2, buf, 3); |
| // OBSOLETE if (status != 0) |
| // OBSOLETE { |
| // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Get the PC this instruction will branch to. */ |
| // OBSOLETE temp = (extract_signed_integer (buf, 3) + addr + 5) & 0xffffff; |
| // OBSOLETE |
| // OBSOLETE /* Get the name of the function at the target address. */ |
| // OBSOLETE status = find_pc_partial_function (temp, &name, NULL, NULL); |
| // OBSOLETE if (status == 0) |
| // OBSOLETE { |
| // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ()); |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Note if it is an out of line prologue. */ |
| // OBSOLETE out_of_line_prologue = (strcmp (name, "__prologue") == 0); |
| // OBSOLETE |
| // OBSOLETE /* This sucks up 5 bytes of instruction space. */ |
| // OBSOLETE if (out_of_line_prologue) |
| // OBSOLETE addr += 5; |
| // OBSOLETE |
| // OBSOLETE if (addr >= stop) |
| // OBSOLETE { |
| // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP)) |
| // OBSOLETE { |
| // OBSOLETE fi->stack_size -= 16; |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - fi->stack_size); |
| // OBSOLETE } |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Now actually handle the out of line prologue. */ |
| // OBSOLETE if (out_of_line_prologue) |
| // OBSOLETE { |
| // OBSOLETE int outgoing_args_size = 0; |
| // OBSOLETE |
| // OBSOLETE /* First adjust the stack size for this function. The out of |
| // OBSOLETE line prologue saves 4 registers (16bytes of data). */ |
| // OBSOLETE if (fi) |
| // OBSOLETE fi->stack_size -= 16; |
| // OBSOLETE |
| // OBSOLETE /* Update fi->frame if necessary. */ |
| // OBSOLETE if (fi && get_next_frame (fi) == NULL) |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - fi->stack_size); |
| // OBSOLETE |
| // OBSOLETE /* After the out of line prologue, there may be another |
| // OBSOLETE stack adjustment for the outgoing arguments. |
| // OBSOLETE |
| // OBSOLETE Search for add imm8,a3 (0xd3XX) |
| // OBSOLETE or add imm16,a3 (0xf70bXXXX) |
| // OBSOLETE or add imm24,a3 (0xf467XXXXXX). */ |
| // OBSOLETE |
| // OBSOLETE status = target_read_memory (addr, buf, 2); |
| // OBSOLETE if (status != 0) |
| // OBSOLETE { |
| // OBSOLETE if (fi) |
| // OBSOLETE { |
| // OBSOLETE fi->fsr.regs[2] = get_frame_base (fi) + fi->stack_size + 4; |
| // OBSOLETE fi->fsr.regs[3] = get_frame_base (fi) + fi->stack_size + 8; |
| // OBSOLETE fi->fsr.regs[5] = get_frame_base (fi) + fi->stack_size + 12; |
| // OBSOLETE fi->fsr.regs[6] = get_frame_base (fi) + fi->stack_size + 16; |
| // OBSOLETE } |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE if (buf[0] == 0xd3) |
| // OBSOLETE { |
| // OBSOLETE outgoing_args_size = extract_signed_integer (&buf[1], 1); |
| // OBSOLETE addr += 2; |
| // OBSOLETE } |
| // OBSOLETE else if (buf[0] == 0xf7 && buf[1] == 0x0b) |
| // OBSOLETE { |
| // OBSOLETE status = target_read_memory (addr + 2, buf, 2); |
| // OBSOLETE if (status != 0) |
| // OBSOLETE { |
| // OBSOLETE if (fi) |
| // OBSOLETE { |
| // OBSOLETE fi->fsr.regs[2] = get_frame_base (fi) + fi->stack_size + 4; |
| // OBSOLETE fi->fsr.regs[3] = get_frame_base (fi) + fi->stack_size + 8; |
| // OBSOLETE fi->fsr.regs[5] = get_frame_base (fi) + fi->stack_size + 12; |
| // OBSOLETE fi->fsr.regs[6] = get_frame_base (fi) + fi->stack_size + 16; |
| // OBSOLETE } |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE outgoing_args_size = extract_signed_integer (buf, 2); |
| // OBSOLETE addr += 4; |
| // OBSOLETE } |
| // OBSOLETE else if (buf[0] == 0xf4 && buf[1] == 0x67) |
| // OBSOLETE { |
| // OBSOLETE status = target_read_memory (addr + 2, buf, 3); |
| // OBSOLETE if (status != 0) |
| // OBSOLETE { |
| // OBSOLETE if (fi && get_next_frame (fi) == NULL) |
| // OBSOLETE { |
| // OBSOLETE fi->fsr.regs[2] = get_frame_base (fi) + fi->stack_size + 4; |
| // OBSOLETE fi->fsr.regs[3] = get_frame_base (fi) + fi->stack_size + 8; |
| // OBSOLETE fi->fsr.regs[5] = get_frame_base (fi) + fi->stack_size + 12; |
| // OBSOLETE fi->fsr.regs[6] = get_frame_base (fi) + fi->stack_size + 16; |
| // OBSOLETE } |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE outgoing_args_size = extract_signed_integer (buf, 3); |
| // OBSOLETE addr += 5; |
| // OBSOLETE } |
| // OBSOLETE else |
| // OBSOLETE outgoing_args_size = 0; |
| // OBSOLETE |
| // OBSOLETE /* Now that we know the size of the outgoing arguments, fix |
| // OBSOLETE fi->frame again if this is the innermost frame. */ |
| // OBSOLETE if (fi && get_next_frame (fi) == NULL) |
| // OBSOLETE deprecated_update_frame_base_hack (fi, get_frame_base (fi) - outgoing_args_size); |
| // OBSOLETE |
| // OBSOLETE /* Note the register save information and update the stack |
| // OBSOLETE size for this frame too. */ |
| // OBSOLETE if (fi) |
| // OBSOLETE { |
| // OBSOLETE fi->fsr.regs[2] = get_frame_base (fi) + fi->stack_size + 4; |
| // OBSOLETE fi->fsr.regs[3] = get_frame_base (fi) + fi->stack_size + 8; |
| // OBSOLETE fi->fsr.regs[5] = get_frame_base (fi) + fi->stack_size + 12; |
| // OBSOLETE fi->fsr.regs[6] = get_frame_base (fi) + fi->stack_size + 16; |
| // OBSOLETE fi->stack_size += outgoing_args_size; |
| // OBSOLETE } |
| // OBSOLETE /* There can be no more prologue insns, so return now. */ |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* At this point fi->frame needs to be correct. |
| // OBSOLETE |
| // OBSOLETE If MY_FRAME_IN_SP is set and we're the innermost frame, then we |
| // OBSOLETE need to fix fi->frame so that backtracing, find_frame_saved_regs, |
| // OBSOLETE etc work correctly. */ |
| // OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP) != 0) |
| // OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - fi->stack_size); |
| // OBSOLETE |
| // OBSOLETE /* And last we have the register saves. These are relatively |
| // OBSOLETE simple because they're physically done off the stack pointer, |
| // OBSOLETE and thus the number of different instructions we need to |
| // OBSOLETE check is greatly reduced because we know the displacements |
| // OBSOLETE will be small. |
| // OBSOLETE |
| // OBSOLETE Search for movx d2,(X,a3) (0xf55eXX) |
| // OBSOLETE then movx d3,(X,a3) (0xf55fXX) |
| // OBSOLETE then mov a1,(X,a3) (0x5dXX) No frame pointer case |
| // OBSOLETE then mov a2,(X,a3) (0x5eXX) No frame pointer case |
| // OBSOLETE or mov a0,(X,a3) (0x5cXX) Frame pointer case. */ |
| // OBSOLETE |
| // OBSOLETE status = target_read_memory (addr, buf, 2); |
| // OBSOLETE if (status != 0) |
| // OBSOLETE return addr; |
| // OBSOLETE if (buf[0] == 0xf5 && buf[1] == 0x5e) |
| // OBSOLETE { |
| // OBSOLETE if (fi) |
| // OBSOLETE { |
| // OBSOLETE status = target_read_memory (addr + 2, buf, 1); |
| // OBSOLETE if (status != 0) |
| // OBSOLETE return addr; |
| // OBSOLETE fi->fsr.regs[2] = (get_frame_base (fi) + stack_size |
| // OBSOLETE + extract_signed_integer (buf, 1)); |
| // OBSOLETE } |
| // OBSOLETE addr += 3; |
| // OBSOLETE if (addr >= stop) |
| // OBSOLETE return addr; |
| // OBSOLETE status = target_read_memory (addr, buf, 2); |
| // OBSOLETE if (status != 0) |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE if (buf[0] == 0xf5 && buf[1] == 0x5f) |
| // OBSOLETE { |
| // OBSOLETE if (fi) |
| // OBSOLETE { |
| // OBSOLETE status = target_read_memory (addr + 2, buf, 1); |
| // OBSOLETE if (status != 0) |
| // OBSOLETE return addr; |
| // OBSOLETE fi->fsr.regs[3] = (get_frame_base (fi) + stack_size |
| // OBSOLETE + extract_signed_integer (buf, 1)); |
| // OBSOLETE } |
| // OBSOLETE addr += 3; |
| // OBSOLETE if (addr >= stop) |
| // OBSOLETE return addr; |
| // OBSOLETE status = target_read_memory (addr, buf, 2); |
| // OBSOLETE if (status != 0) |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE if (buf[0] == 0x5d) |
| // OBSOLETE { |
| // OBSOLETE if (fi) |
| // OBSOLETE { |
| // OBSOLETE status = target_read_memory (addr + 1, buf, 1); |
| // OBSOLETE if (status != 0) |
| // OBSOLETE return addr; |
| // OBSOLETE fi->fsr.regs[5] = (get_frame_base (fi) + stack_size |
| // OBSOLETE + extract_signed_integer (buf, 1)); |
| // OBSOLETE } |
| // OBSOLETE addr += 2; |
| // OBSOLETE if (addr >= stop) |
| // OBSOLETE return addr; |
| // OBSOLETE status = target_read_memory (addr, buf, 2); |
| // OBSOLETE if (status != 0) |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE if (buf[0] == 0x5e || buf[0] == 0x5c) |
| // OBSOLETE { |
| // OBSOLETE if (fi) |
| // OBSOLETE { |
| // OBSOLETE status = target_read_memory (addr + 1, buf, 1); |
| // OBSOLETE if (status != 0) |
| // OBSOLETE return addr; |
| // OBSOLETE fi->fsr.regs[6] = (get_frame_base (fi) + stack_size |
| // OBSOLETE + extract_signed_integer (buf, 1)); |
| // OBSOLETE fi->status &= ~CALLER_A2_IN_A0; |
| // OBSOLETE } |
| // OBSOLETE addr += 2; |
| // OBSOLETE if (addr >= stop) |
| // OBSOLETE return addr; |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE return addr; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Function: frame_chain |
| // OBSOLETE Figure out and return the caller's frame pointer given current |
| // OBSOLETE frame_info struct. |
| // OBSOLETE |
| // OBSOLETE We don't handle dummy frames yet but we would probably just return the |
| // OBSOLETE stack pointer that was in use at the time the function call was made? */ |
| // OBSOLETE |
| // OBSOLETE CORE_ADDR |
| // OBSOLETE mn10200_frame_chain (struct frame_info *fi) |
| // OBSOLETE { |
| // OBSOLETE struct frame_info *dummy_frame = deprecated_frame_xmalloc (); |
| // OBSOLETE struct cleanup *old_chain = make_cleanup (xfree, dummy_frame); |
| // OBSOLETE CORE_ADDR ret; |
| // OBSOLETE |
| // OBSOLETE /* Walk through the prologue to determine the stack size, |
| // OBSOLETE location of saved registers, end of the prologue, etc. */ |
| // OBSOLETE if (fi->status == 0) |
| // OBSOLETE mn10200_analyze_prologue (fi, (CORE_ADDR) 0); |
| // OBSOLETE |
| // OBSOLETE /* Quit now if mn10200_analyze_prologue set NO_MORE_FRAMES. */ |
| // OBSOLETE if (fi->status & NO_MORE_FRAMES) |
| // OBSOLETE return 0; |
| // OBSOLETE |
| // OBSOLETE /* Now that we've analyzed our prologue, determine the frame |
| // OBSOLETE pointer for our caller. |
| // OBSOLETE |
| // OBSOLETE If our caller has a frame pointer, then we need to |
| // OBSOLETE find the entry value of $a2 to our function. |
| // OBSOLETE |
| // OBSOLETE If CALLER_A2_IN_A0, then the chain is in $a0. |
| // OBSOLETE |
| // OBSOLETE If fsr.regs[6] is nonzero, then it's at the memory |
| // OBSOLETE location pointed to by fsr.regs[6]. |
| // OBSOLETE |
| // OBSOLETE Else it's still in $a2. |
| // OBSOLETE |
| // OBSOLETE If our caller does not have a frame pointer, then his |
| // OBSOLETE frame base is fi->frame + -caller's stack size + 4. */ |
| // OBSOLETE |
| // OBSOLETE /* The easiest way to get that info is to analyze our caller's frame. |
| // OBSOLETE |
| // OBSOLETE So we set up a dummy frame and call mn10200_analyze_prologue to |
| // OBSOLETE find stuff for us. */ |
| // OBSOLETE deprecated_update_frame_pc_hack (dummy_frame, FRAME_SAVED_PC (fi)); |
| // OBSOLETE deprecated_update_frame_base_hack (dummy_frame, get_frame_base (fi)); |
| // OBSOLETE memset (dummy_frame->fsr.regs, '\000', sizeof dummy_frame->fsr.regs); |
| // OBSOLETE dummy_frame->status = 0; |
| // OBSOLETE dummy_frame->stack_size = 0; |
| // OBSOLETE mn10200_analyze_prologue (dummy_frame, 0); |
| // OBSOLETE |
| // OBSOLETE if (dummy_frame->status & MY_FRAME_IN_FP) |
| // OBSOLETE { |
| // OBSOLETE /* Our caller has a frame pointer. So find the frame in $a2, $a0, |
| // OBSOLETE or in the stack. */ |
| // OBSOLETE if (fi->fsr.regs[6]) |
| // OBSOLETE ret = (read_memory_integer (fi->fsr.regs[FP_REGNUM], REGISTER_SIZE) |
| // OBSOLETE & 0xffffff); |
| // OBSOLETE else if (fi->status & CALLER_A2_IN_A0) |
| // OBSOLETE ret = read_register (4); |
| // OBSOLETE else |
| // OBSOLETE ret = read_register (FP_REGNUM); |
| // OBSOLETE } |
| // OBSOLETE else |
| // OBSOLETE { |
| // OBSOLETE /* Our caller does not have a frame pointer. So his frame starts |
| // OBSOLETE at the base of our frame (fi->frame) + <his size> + 4 (saved pc). */ |
| // OBSOLETE ret = get_frame_base (fi) + -dummy_frame->stack_size + 4; |
| // OBSOLETE } |
| // OBSOLETE do_cleanups (old_chain); |
| // OBSOLETE return ret; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Function: skip_prologue |
| // OBSOLETE Return the address of the first inst past the prologue of the function. */ |
| // OBSOLETE |
| // OBSOLETE CORE_ADDR |
| // OBSOLETE mn10200_skip_prologue (CORE_ADDR pc) |
| // OBSOLETE { |
| // OBSOLETE /* We used to check the debug symbols, but that can lose if |
| // OBSOLETE we have a null prologue. */ |
| // OBSOLETE return mn10200_analyze_prologue (NULL, pc); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Function: pop_frame |
| // OBSOLETE This routine gets called when either the user uses the `return' |
| // OBSOLETE command, or the call dummy breakpoint gets hit. */ |
| // OBSOLETE |
| // OBSOLETE void |
| // OBSOLETE mn10200_pop_frame (struct frame_info *frame) |
| // OBSOLETE { |
| // OBSOLETE int regnum; |
| // OBSOLETE |
| // OBSOLETE if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (frame), |
| // OBSOLETE get_frame_base (frame), |
| // OBSOLETE get_frame_base (frame))) |
| // OBSOLETE generic_pop_dummy_frame (); |
| // OBSOLETE else |
| // OBSOLETE { |
| // OBSOLETE write_register (PC_REGNUM, FRAME_SAVED_PC (frame)); |
| // OBSOLETE |
| // OBSOLETE /* Restore any saved registers. */ |
| // OBSOLETE for (regnum = 0; regnum < NUM_REGS; regnum++) |
| // OBSOLETE if (frame->fsr.regs[regnum] != 0) |
| // OBSOLETE { |
| // OBSOLETE ULONGEST value; |
| // OBSOLETE |
| // OBSOLETE value = read_memory_unsigned_integer (frame->fsr.regs[regnum], |
| // OBSOLETE REGISTER_RAW_SIZE (regnum)); |
| // OBSOLETE write_register (regnum, value); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Actually cut back the stack. */ |
| // OBSOLETE write_register (SP_REGNUM, get_frame_base (frame)); |
| // OBSOLETE |
| // OBSOLETE /* Don't we need to set the PC?!? XXX FIXME. */ |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Throw away any cached frame information. */ |
| // OBSOLETE flush_cached_frames (); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Function: push_arguments |
| // OBSOLETE Setup arguments for a call to the target. Arguments go in |
| // OBSOLETE order on the stack. */ |
| // OBSOLETE |
| // OBSOLETE CORE_ADDR |
| // OBSOLETE mn10200_push_arguments (int nargs, struct value **args, CORE_ADDR sp, |
| // OBSOLETE unsigned char struct_return, CORE_ADDR struct_addr) |
| // OBSOLETE { |
| // OBSOLETE int argnum = 0; |
| // OBSOLETE int len = 0; |
| // OBSOLETE int stack_offset = 0; |
| // OBSOLETE int regsused = struct_return ? 1 : 0; |
| // OBSOLETE |
| // OBSOLETE /* This should be a nop, but align the stack just in case something |
| // OBSOLETE went wrong. Stacks are two byte aligned on the mn10200. */ |
| // OBSOLETE sp &= ~1; |
| // OBSOLETE |
| // OBSOLETE /* Now make space on the stack for the args. |
| // OBSOLETE |
| // OBSOLETE XXX This doesn't appear to handle pass-by-invisible reference |
| // OBSOLETE arguments. */ |
| // OBSOLETE for (argnum = 0; argnum < nargs; argnum++) |
| // OBSOLETE { |
| // OBSOLETE int arg_length = (TYPE_LENGTH (VALUE_TYPE (args[argnum])) + 1) & ~1; |
| // OBSOLETE |
| // OBSOLETE /* If we've used all argument registers, then this argument is |
| // OBSOLETE pushed. */ |
| // OBSOLETE if (regsused >= 2 || arg_length > 4) |
| // OBSOLETE { |
| // OBSOLETE regsused = 2; |
| // OBSOLETE len += arg_length; |
| // OBSOLETE } |
| // OBSOLETE /* We know we've got some arg register space left. If this argument |
| // OBSOLETE will fit entirely in regs, then put it there. */ |
| // OBSOLETE else if (arg_length <= 2 |
| // OBSOLETE || TYPE_CODE (VALUE_TYPE (args[argnum])) == TYPE_CODE_PTR) |
| // OBSOLETE { |
| // OBSOLETE regsused++; |
| // OBSOLETE } |
| // OBSOLETE else if (regsused == 0) |
| // OBSOLETE { |
| // OBSOLETE regsused = 2; |
| // OBSOLETE } |
| // OBSOLETE else |
| // OBSOLETE { |
| // OBSOLETE regsused = 2; |
| // OBSOLETE len += arg_length; |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Allocate stack space. */ |
| // OBSOLETE sp -= len; |
| // OBSOLETE |
| // OBSOLETE regsused = struct_return ? 1 : 0; |
| // OBSOLETE /* Push all arguments onto the stack. */ |
| // OBSOLETE for (argnum = 0; argnum < nargs; argnum++) |
| // OBSOLETE { |
| // OBSOLETE int len; |
| // OBSOLETE char *val; |
| // OBSOLETE |
| // OBSOLETE /* XXX Check this. What about UNIONS? */ |
| // OBSOLETE if (TYPE_CODE (VALUE_TYPE (*args)) == TYPE_CODE_STRUCT |
| // OBSOLETE && TYPE_LENGTH (VALUE_TYPE (*args)) > 8) |
| // OBSOLETE { |
| // OBSOLETE /* XXX Wrong, we want a pointer to this argument. */ |
| // OBSOLETE len = TYPE_LENGTH (VALUE_TYPE (*args)); |
| // OBSOLETE val = (char *) VALUE_CONTENTS (*args); |
| // OBSOLETE } |
| // OBSOLETE else |
| // OBSOLETE { |
| // OBSOLETE len = TYPE_LENGTH (VALUE_TYPE (*args)); |
| // OBSOLETE val = (char *) VALUE_CONTENTS (*args); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE if (regsused < 2 |
| // OBSOLETE && (len <= 2 |
| // OBSOLETE || TYPE_CODE (VALUE_TYPE (*args)) == TYPE_CODE_PTR)) |
| // OBSOLETE { |
| // OBSOLETE write_register (regsused, extract_unsigned_integer (val, 4)); |
| // OBSOLETE regsused++; |
| // OBSOLETE } |
| // OBSOLETE else if (regsused == 0 && len == 4) |
| // OBSOLETE { |
| // OBSOLETE write_register (regsused, extract_unsigned_integer (val, 2)); |
| // OBSOLETE write_register (regsused + 1, extract_unsigned_integer (val + 2, 2)); |
| // OBSOLETE regsused = 2; |
| // OBSOLETE } |
| // OBSOLETE else |
| // OBSOLETE { |
| // OBSOLETE regsused = 2; |
| // OBSOLETE while (len > 0) |
| // OBSOLETE { |
| // OBSOLETE write_memory (sp + stack_offset, val, 2); |
| // OBSOLETE |
| // OBSOLETE len -= 2; |
| // OBSOLETE val += 2; |
| // OBSOLETE stack_offset += 2; |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE args++; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE return sp; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Function: push_return_address (pc) |
| // OBSOLETE Set up the return address for the inferior function call. |
| // OBSOLETE Needed for targets where we don't actually execute a JSR/BSR instruction */ |
| // OBSOLETE |
| // OBSOLETE CORE_ADDR |
| // OBSOLETE mn10200_push_return_address (CORE_ADDR pc, CORE_ADDR sp) |
| // OBSOLETE { |
| // OBSOLETE unsigned char buf[4]; |
| // OBSOLETE |
| // OBSOLETE store_unsigned_integer (buf, 4, CALL_DUMMY_ADDRESS ()); |
| // OBSOLETE write_memory (sp - 4, buf, 4); |
| // OBSOLETE return sp - 4; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Function: store_struct_return (addr,sp) |
| // OBSOLETE Store the structure value return address for an inferior function |
| // OBSOLETE call. */ |
| // OBSOLETE |
| // OBSOLETE CORE_ADDR |
| // OBSOLETE mn10200_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) |
| // OBSOLETE { |
| // OBSOLETE /* The structure return address is passed as the first argument. */ |
| // OBSOLETE write_register (0, addr); |
| // OBSOLETE return sp; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Function: frame_saved_pc |
| // OBSOLETE Find the caller of this frame. We do this by seeing if RP_REGNUM |
| // OBSOLETE is saved in the stack anywhere, otherwise we get it from the |
| // OBSOLETE registers. If the inner frame is a dummy frame, return its PC |
| // OBSOLETE instead of RP, because that's where "caller" of the dummy-frame |
| // OBSOLETE will be found. */ |
| // OBSOLETE |
| // OBSOLETE CORE_ADDR |
| // OBSOLETE mn10200_frame_saved_pc (struct frame_info *fi) |
| // OBSOLETE { |
| // OBSOLETE /* The saved PC will always be at the base of the current frame. */ |
| // OBSOLETE return (read_memory_integer (get_frame_base (fi), REGISTER_SIZE) & 0xffffff); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Function: init_extra_frame_info |
| // OBSOLETE Setup the frame's frame pointer, pc, and frame addresses for saved |
| // OBSOLETE registers. Most of the work is done in mn10200_analyze_prologue(). |
| // OBSOLETE |
| // OBSOLETE Note that when we are called for the last frame (currently active frame), |
| // OBSOLETE that get_frame_pc (fi) and fi->frame will already be setup. However, fi->frame will |
| // OBSOLETE be valid only if this routine uses FP. For previous frames, fi-frame will |
| // OBSOLETE always be correct. mn10200_analyze_prologue will fix fi->frame if |
| // OBSOLETE it's not valid. |
| // OBSOLETE |
| // OBSOLETE We can be called with the PC in the call dummy under two circumstances. |
| // OBSOLETE First, during normal backtracing, second, while figuring out the frame |
| // OBSOLETE pointer just prior to calling the target function (see run_stack_dummy). */ |
| // OBSOLETE |
| // OBSOLETE void |
| // OBSOLETE mn10200_init_extra_frame_info (struct frame_info *fi) |
| // OBSOLETE { |
| // OBSOLETE if (get_next_frame (fi)) |
| // OBSOLETE deprecated_update_frame_pc_hack (fi, FRAME_SAVED_PC (get_next_frame (fi))); |
| // OBSOLETE |
| // OBSOLETE memset (fi->fsr.regs, '\000', sizeof fi->fsr.regs); |
| // OBSOLETE fi->status = 0; |
| // OBSOLETE fi->stack_size = 0; |
| // OBSOLETE |
| // OBSOLETE mn10200_analyze_prologue (fi, 0); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE void |
| // OBSOLETE _initialize_mn10200_tdep (void) |
| // OBSOLETE { |
| // OBSOLETE tm_print_insn = print_insn_mn10200; |
| // OBSOLETE } |
