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* mn10300-tdep.c (set_movm_offsets): New helper function
for mn10300_analyze_prologue. (mn10300_analyze_prologue): Simplify by factoring out common code. Fix bugs in setting frame address for optimized code. Use read_memory_nobpt instead of target_read_memory.
This commit is contained in:
Mark Alexander
parent
6e77819495
commit
52e4073c5f
@ -1,3 +1,11 @@
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Fri Jul 24 07:41:12 1998 Mark Alexander <marka@cygnus.com>
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* mn10300-tdep.c (set_movm_offsets): New helper function
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for mn10300_analyze_prologue.
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(mn10300_analyze_prologue): Simplify by factoring out common code.
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Fix bugs in setting frame address for optimized code.
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Use read_memory_nobpt instead of target_read_memory.
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Thu Jul 23 17:01:17 1998 Michael Snyder <msnyder@cleaver.cygnus.com>
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* tracepoint.c (collect_symbol): handle LOC_ARG case.
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@ -28,153 +28,406 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "gdbcore.h"
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#include "symfile.h"
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/* Info gleaned from scanning a function's prologue. */
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char *mn10300_generic_register_names[] = REGISTER_NAMES;
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struct pifsr /* Info about one saved reg */
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/* start-sanitize-am33 */
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char *am33_register_names [] =
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{ "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3",
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"sp", "pc", "mdr", "psw", "lir", "lar", "",
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"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
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"ssp", "msp", "usp", "mcrh", "mcrl", "mcvf", "", "", ""};
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/* end-sanitize-am33 */
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/* Set offsets of registers saved by movm instruction.
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This is a helper function for mn10300_analyze_prologue. */
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static void
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set_movm_offsets (fi, found_movm)
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struct frame_info *fi;
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int found_movm;
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{
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int framereg; /* Frame reg (SP or FP) */
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int offset; /* Offset from framereg */
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int reg; /* Saved register number */
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};
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if (fi == NULL || found_movm == 0)
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return;
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fi->fsr.regs[7] = fi->frame;
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fi->fsr.regs[6] = fi->frame + 4;
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fi->fsr.regs[3] = fi->frame + 8;
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fi->fsr.regs[2] = fi->frame + 12;
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/* start-sanitize-am33 */
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fi->fsr.regs[E0_REGNUM+5] = fi->frame + 16;
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fi->fsr.regs[E0_REGNUM+4] = fi->frame + 20;
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fi->fsr.regs[E0_REGNUM+3] = fi->frame + 24;
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fi->fsr.regs[E0_REGNUM+2] = fi->frame + 28;
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/* end-sanitize-am33 */
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}
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struct prologue_info
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/* The main purpose of this file is dealing with prologues to extract
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information about stack frames and saved registers.
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For reference here's how prologues look on the mn10300:
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With frame pointer:
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movm [d2,d3,a2,a3],sp
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mov sp,a3
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add <size>,sp
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Without frame pointer:
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movm [d2,d3,a2,a3],sp (if needed)
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add <size>,sp
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One day we might keep the stack pointer constant, that won't
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change the code for prologues, but it will make the frame
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pointerless case much more common. */
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/* Analyze the prologue to determine where registers are saved,
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the end of the prologue, etc etc. Return the end of the prologue
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scanned.
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We store into FI (if non-null) several tidbits of information:
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* stack_size -- size of this stack frame. Note that if we stop in
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certain parts of the prologue/epilogue we may claim the size of the
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current frame is zero. This happens when the current frame has
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not been allocated yet or has already been deallocated.
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* fsr -- Addresses of registers saved in the stack by this frame.
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* status -- A (relatively) generic status indicator. It's a bitmask
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with the following bits:
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MY_FRAME_IN_SP: The base of the current frame is actually in
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the stack pointer. This can happen for frame pointerless
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functions, or cases where we're stopped in the prologue/epilogue
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itself. For these cases mn10300_analyze_prologue will need up
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update fi->frame before returning or analyzing the register
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save instructions.
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MY_FRAME_IN_FP: The base of the current frame is in the
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frame pointer register ($a2).
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NO_MORE_FRAMES: Set this if the current frame is "start" or
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if the first instruction looks like mov <imm>,sp. This tells
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frame chain to not bother trying to unwind past this frame. */
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#define MY_FRAME_IN_SP 0x1
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#define MY_FRAME_IN_FP 0x2
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#define NO_MORE_FRAMES 0x4
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static CORE_ADDR
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mn10300_analyze_prologue (fi, pc)
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struct frame_info *fi;
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CORE_ADDR pc;
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{
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int framereg;
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int frameoffset;
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int start_function;
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struct pifsr *pifsrs;
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};
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CORE_ADDR func_addr, func_end, addr, stop;
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CORE_ADDR stack_size;
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int imm_size;
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unsigned char buf[4];
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int status, found_movm = 0;
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char *name;
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/* Use the PC in the frame if it's provided to look up the
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start of this function. */
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pc = (fi ? fi->pc : pc);
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/* Find the start of this function. */
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status = find_pc_partial_function (pc, &name, &func_addr, &func_end);
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/* Do nothing if we couldn't find the start of this function or if we're
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stopped at the first instruction in the prologue. */
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if (status == 0)
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return pc;
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/* If we're in start, then give up. */
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if (strcmp (name, "start") == 0)
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{
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fi->status = NO_MORE_FRAMES;
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return pc;
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}
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/* At the start of a function our frame is in the stack pointer. */
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if (fi)
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fi->status = MY_FRAME_IN_SP;
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/* Get the next two bytes into buf, we need two because rets is a two
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byte insn and the first isn't enough to uniquely identify it. */
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status = read_memory_nobpt (pc, buf, 2);
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if (status != 0)
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return pc;
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/* If we're physically on an "rets" instruction, then our frame has
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already been deallocated. Note this can also be true for retf
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and ret if they specify a size of zero.
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In this case fi->frame is bogus, we need to fix it. */
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if (fi && buf[0] == 0xf0 && buf[1] == 0xfc)
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{
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if (fi->next == NULL)
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fi->frame = read_sp ();
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return fi->pc;
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}
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/* Similarly if we're stopped on the first insn of a prologue as our
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frame hasn't been allocated yet. */
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if (fi && fi->pc == func_addr)
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{
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if (fi->next == NULL)
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fi->frame = read_sp ();
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return fi->pc;
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}
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/* Figure out where to stop scanning. */
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stop = fi ? fi->pc : func_end;
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/* Don't walk off the end of the function. */
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stop = stop > func_end ? func_end : stop;
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/* Start scanning on the first instruction of this function. */
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addr = func_addr;
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/* Suck in two bytes. */
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status = read_memory_nobpt (addr, buf, 2);
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if (status != 0)
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{
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if (fi && fi->next == NULL && fi->status & MY_FRAME_IN_SP)
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fi->frame = read_sp ();
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return addr;
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}
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/* First see if this insn sets the stack pointer; if so, it's something
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we won't understand, so quit now. */
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if (buf[0] == 0xf2 && (buf[1] & 0xf3) == 0xf0)
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{
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if (fi)
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fi->status = NO_MORE_FRAMES;
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return addr;
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}
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/* Now look for movm [regs],sp, which saves the callee saved registers.
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At this time we don't know if fi->frame is valid, so we only note
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that we encountered a movm instruction. Later, we'll set the entries
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in fsr.regs as needed. */
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if (buf[0] == 0xcf)
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{
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found_movm = 1;
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addr += 2;
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/* Quit now if we're beyond the stop point. */
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if (addr >= stop)
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{
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/* Fix fi->frame since it's bogus at this point. */
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if (fi && fi->next == NULL)
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fi->frame = read_sp ();
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/* Note if/where callee saved registers were saved. */
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set_movm_offsets (fi, found_movm);
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return addr;
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}
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/* Get the next two bytes so the prologue scan can continue. */
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status = read_memory_nobpt (addr, buf, 2);
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if (status != 0)
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{
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/* Fix fi->frame since it's bogus at this point. */
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if (fi && fi->next == NULL)
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fi->frame = read_sp ();
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/* Note if/where callee saved registers were saved. */
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set_movm_offsets (fi, found_movm);
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return addr;
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}
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}
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/* Now see if we set up a frame pointer via "mov sp,a3" */
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if (buf[0] == 0x3f)
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{
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addr += 1;
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/* The frame pointer is now valid. */
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if (fi)
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{
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fi->status |= MY_FRAME_IN_FP;
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fi->status &= ~MY_FRAME_IN_SP;
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}
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/* Quit now if we're beyond the stop point. */
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if (addr >= stop)
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{
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/* Note if/where callee saved registers were saved. */
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set_movm_offsets (fi, found_movm);
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return addr;
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}
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/* Get two more bytes so scanning can continue. */
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status = read_memory_nobpt (addr, buf, 2);
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if (status != 0)
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{
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/* Note if/where callee saved registers were saved. */
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set_movm_offsets (fi, found_movm);
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return addr;
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}
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}
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/* Next we should allocate the local frame. No more prologue insns
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are found after allocating the local frame.
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Search for add imm8,sp (0xf8feXX)
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or add imm16,sp (0xfafeXXXX)
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or add imm32,sp (0xfcfeXXXXXXXX).
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If none of the above was found, then this prologue has no
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additional stack. */
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status = read_memory_nobpt (addr, buf, 2);
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if (status != 0)
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{
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/* Fix fi->frame if it's bogus at this point. */
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if (fi && fi->next == NULL && (fi->status & MY_FRAME_IN_SP))
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fi->frame = read_sp ();
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/* Note if/where callee saved registers were saved. */
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set_movm_offsets (fi, found_movm);
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return addr;
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}
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imm_size = 0;
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if (buf[0] == 0xf8 && buf[1] == 0xfe)
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imm_size = 1;
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else if (buf[0] == 0xfa && buf[1] == 0xfe)
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imm_size = 2;
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else if (buf[0] == 0xfc && buf[1] == 0xfe)
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imm_size = 4;
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if (imm_size != 0)
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{
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/* Suck in imm_size more bytes, they'll hold the size of the
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current frame. */
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status = read_memory_nobpt (addr + 2, buf, imm_size);
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if (status != 0)
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{
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/* Fix fi->frame if it's bogus at this point. */
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if (fi && fi->next == NULL && (fi->status & MY_FRAME_IN_SP))
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fi->frame = read_sp ();
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/* Note if/where callee saved registers were saved. */
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set_movm_offsets (fi, found_movm);
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return addr;
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}
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/* Note the size of the stack in the frame info structure. */
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stack_size = extract_signed_integer (buf, imm_size);
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if (fi)
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fi->stack_size = stack_size;
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/* We just consumed 2 + imm_size bytes. */
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addr += 2 + imm_size;
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/* No more prologue insns follow, so begin preparation to return. */
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/* Fix fi->frame if it's bogus at this point. */
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if (fi && fi->next == NULL && (fi->status & MY_FRAME_IN_SP))
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fi->frame = read_sp ();
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/* Note if/where callee saved registers were saved. */
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set_movm_offsets (fi, found_movm);
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return addr;
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}
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/* We never found an insn which allocates local stack space, regardless
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this is the end of the prologue. */
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/* Fix fi->frame if it's bogus at this point. */
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if (fi && fi->next == NULL && (fi->status & MY_FRAME_IN_SP))
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fi->frame = read_sp ();
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/* Note if/where callee saved registers were saved. */
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set_movm_offsets (fi, found_movm);
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return addr;
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}
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/* Function: frame_chain
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Figure out and return the caller's frame pointer given current
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frame_info struct.
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We start out knowing the current pc, current sp, current fp.
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We want to determine the caller's fp and caller's pc. To do this
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correctly, we have to be able to handle the case where we are in the
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middle of the prologue which involves scanning the prologue.
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We don't handle dummy frames yet but we would probably just return the
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stack pointer that was in use at the time the function call was made?
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*/
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stack pointer that was in use at the time the function call was made? */
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CORE_ADDR
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mn10300_frame_chain (fi)
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struct frame_info *fi;
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{
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struct prologue_info pi;
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CORE_ADDR callers_pc, callers_fp, curr_sp;
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CORE_ADDR past_prologue_addr;
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int past_prologue = 1; /* default to being past prologue */
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int n_movm_args = 4;
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struct frame_info dummy_frame;
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struct pifsr *pifsr, *pifsr_tmp;
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/* Walk through the prologue to determine the stack size,
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location of saved registers, end of the prologue, etc. */
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if (fi->status == 0)
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mn10300_analyze_prologue (fi, (CORE_ADDR)0);
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/* current pc is fi->pc */
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/* current fp is fi->frame */
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/* Quit now if mn10300_analyze_prologue set NO_MORE_FRAMES. */
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if (fi->status & NO_MORE_FRAMES)
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return 0;
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/* current sp is: */
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curr_sp = read_register (SP_REGNUM);
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/* Now that we've analyzed our prologue, determine the frame
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pointer for our caller.
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/*
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printf("curr pc = 0x%x ; curr fp = 0x%x ; curr sp = 0x%x\n",
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fi->pc, fi->frame, curr_sp);
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*/
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If our caller has a frame pointer, then we need to
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find the entry value of $a3 to our function.
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/* first inst after prologue is: */
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past_prologue_addr = mn10300_skip_prologue (fi->pc);
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If fsr.regs[7] is nonzero, then it's at the memory
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location pointed to by fsr.regs[7].
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/* Are we in the prologue? */
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/* Yes if mn10300_skip_prologue returns an address after the
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current pc in which case we have to scan prologue */
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if (fi->pc < mn10300_skip_prologue (fi->pc))
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past_prologue = 0;
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Else it's still in $a3.
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/* scan prologue if we're not past it */
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if (!past_prologue)
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If our caller does not have a frame pointer, then his
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frame base is fi->frame + -caller's stack size. */
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/* The easiest way to get that info is to analyze our caller's frame.
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So we set up a dummy frame and call mn10300_analyze_prologue to
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find stuff for us. */
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dummy_frame.pc = FRAME_SAVED_PC (fi);
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dummy_frame.frame = fi->frame;
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memset (dummy_frame.fsr.regs, '\000', sizeof dummy_frame.fsr.regs);
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dummy_frame.status = 0;
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dummy_frame.stack_size = 0;
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mn10300_analyze_prologue (&dummy_frame);
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if (dummy_frame.status & MY_FRAME_IN_FP)
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{
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/* printf("scanning prologue\n"); */
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/* FIXME -- fill out this case later */
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return 0x0; /* bogus value */
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/* Our caller has a frame pointer. So find the frame in $a3 or
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in the stack. */
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if (fi->fsr.regs[7])
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return (read_memory_integer (fi->fsr.regs[FP_REGNUM], REGISTER_SIZE));
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else
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return read_register (FP_REGNUM);
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}
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if (past_prologue) /* if we don't need to scan the prologue */
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else
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{
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/* printf("we're past the prologue\n"); */
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callers_pc = fi->frame - REGISTER_SIZE;
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callers_fp = fi->frame - ((n_movm_args + 1) * REGISTER_SIZE);
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/*
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printf("callers_pc = 0x%x ; callers_fp = 0x%x\n",
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callers_pc, callers_fp);
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int adjust = 0;
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printf("*callers_pc = 0x%x ; *callers_fp = 0x%x\n",
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read_memory_integer(callers_pc, REGISTER_SIZE),
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read_memory_integer(callers_fp, REGISTER_SIZE));
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*/
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return read_memory_integer(callers_fp, REGISTER_SIZE);
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adjust += (fi->fsr.regs[2] ? 4 : 0);
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adjust += (fi->fsr.regs[3] ? 4 : 0);
|
||||
adjust += (fi->fsr.regs[6] ? 4 : 0);
|
||||
adjust += (fi->fsr.regs[7] ? 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. */
|
||||
return fi->frame + adjust;
|
||||
}
|
||||
|
||||
/* we don't get here */
|
||||
}
|
||||
|
||||
/* Function: find_callers_reg
|
||||
Find REGNUM on the stack. Otherwise, it's in an active register.
|
||||
One thing we might want to do here is to check REGNUM against the
|
||||
clobber mask, and somehow flag it as invalid if it isn't saved on
|
||||
the stack somewhere. This would provide a graceful failure mode
|
||||
when trying to get the value of caller-saves registers for an inner
|
||||
frame. */
|
||||
|
||||
CORE_ADDR
|
||||
mn10300_find_callers_reg (fi, regnum)
|
||||
struct frame_info *fi;
|
||||
int regnum;
|
||||
{
|
||||
/* printf("mn10300_find_callers_reg\n"); */
|
||||
|
||||
for (; fi; fi = fi->next)
|
||||
if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame))
|
||||
return generic_read_register_dummy (fi->pc, fi->frame, regnum);
|
||||
else if (fi->fsr.regs[regnum] != 0)
|
||||
return read_memory_unsigned_integer (fi->fsr.regs[regnum],
|
||||
REGISTER_RAW_SIZE(regnum));
|
||||
|
||||
return read_register (regnum);
|
||||
}
|
||||
|
||||
/* Function: skip_prologue
|
||||
Return the address of the first inst past the prologue of the function.
|
||||
*/
|
||||
Return the address of the first inst past the prologue of the function. */
|
||||
|
||||
CORE_ADDR
|
||||
mn10300_skip_prologue (pc)
|
||||
CORE_ADDR pc;
|
||||
{
|
||||
CORE_ADDR func_addr, func_end;
|
||||
|
||||
/* printf("mn10300_skip_prologue\n"); */
|
||||
|
||||
/* See what the symbol table says */
|
||||
|
||||
if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
|
||||
{
|
||||
struct symtab_and_line sal;
|
||||
|
||||
sal = find_pc_line (func_addr, 0);
|
||||
|
||||
if (sal.line != 0 && sal.end < func_end)
|
||||
return sal.end;
|
||||
else
|
||||
/* Either there's no line info, or the line after the prologue is after
|
||||
the end of the function. In this case, there probably isn't a
|
||||
prologue. */
|
||||
return pc;
|
||||
}
|
||||
|
||||
/* We can't find the start of this function, so there's nothing we can do. */
|
||||
return pc;
|
||||
/* We used to check the debug symbols, but that can lose if
|
||||
we have a null prologue. */
|
||||
return mn10300_analyze_prologue (NULL, pc);
|
||||
}
|
||||
|
||||
|
||||
/* Function: pop_frame
|
||||
This routine gets called when either the user uses the `return'
|
||||
command, or the call dummy breakpoint gets hit. */
|
||||
@ -185,32 +438,36 @@ mn10300_pop_frame (frame)
|
||||
{
|
||||
int regnum;
|
||||
|
||||
/* printf("mn10300_pop_frame start\n"); */
|
||||
|
||||
if (PC_IN_CALL_DUMMY(frame->pc, frame->frame, frame->frame))
|
||||
generic_pop_dummy_frame ();
|
||||
else
|
||||
{
|
||||
write_register (PC_REGNUM, FRAME_SAVED_PC (frame));
|
||||
|
||||
/* Restore any saved registers. */
|
||||
for (regnum = 0; regnum < NUM_REGS; regnum++)
|
||||
if (frame->fsr.regs[regnum] != 0)
|
||||
write_register (regnum,
|
||||
read_memory_unsigned_integer (frame->fsr.regs[regnum],
|
||||
REGISTER_RAW_SIZE(regnum)));
|
||||
{
|
||||
ULONGEST value;
|
||||
|
||||
value = read_memory_unsigned_integer (frame->fsr.regs[regnum],
|
||||
REGISTER_RAW_SIZE (regnum));
|
||||
write_register (regnum, value);
|
||||
}
|
||||
|
||||
/* Actually cut back the stack. */
|
||||
write_register (SP_REGNUM, FRAME_FP (frame));
|
||||
|
||||
/* Don't we need to set the PC?!? XXX FIXME. */
|
||||
}
|
||||
|
||||
/* Throw away any cached frame information. */
|
||||
flush_cached_frames ();
|
||||
|
||||
/* printf("mn10300_pop_frame end\n"); */
|
||||
}
|
||||
|
||||
/* Function: push_arguments
|
||||
Setup arguments for a call to the target. Arguments go in
|
||||
order on the stack.
|
||||
*/
|
||||
order on the stack. */
|
||||
|
||||
CORE_ADDR
|
||||
mn10300_push_arguments (nargs, args, sp, struct_return, struct_addr)
|
||||
@ -222,29 +479,44 @@ mn10300_push_arguments (nargs, args, sp, struct_return, struct_addr)
|
||||
{
|
||||
int argnum = 0;
|
||||
int len = 0;
|
||||
int stack_offset = 0; /* copy args to this offset onto stack */
|
||||
int stack_offset = 0;
|
||||
int regsused = struct_return ? 1 : 0;
|
||||
|
||||
/* printf("mn10300_push_arguments start\n"); */
|
||||
|
||||
/* First, just for safety, make sure stack is aligned */
|
||||
/* This should be a nop, but align the stack just in case something
|
||||
went wrong. Stacks are four byte aligned on the mn10300. */
|
||||
sp &= ~3;
|
||||
|
||||
/* Now make space on the stack for the args. */
|
||||
for (argnum = 0; argnum < nargs; argnum++)
|
||||
len += ((TYPE_LENGTH(VALUE_TYPE(args[argnum])) + 3) & ~3);
|
||||
/* Now make space on the stack for the args.
|
||||
|
||||
XXX This doesn't appear to handle pass-by-invisible reference
|
||||
arguments. */
|
||||
for (argnum = 0; argnum < nargs; argnum++)
|
||||
{
|
||||
int arg_length = (TYPE_LENGTH (VALUE_TYPE (args[argnum])) + 3) & ~3;
|
||||
|
||||
while (regsused < 2 && arg_length > 0)
|
||||
{
|
||||
regsused++;
|
||||
arg_length -= 4;
|
||||
}
|
||||
len += arg_length;
|
||||
}
|
||||
|
||||
/* Allocate stack space. */
|
||||
sp -= len;
|
||||
|
||||
regsused = struct_return ? 1 : 0;
|
||||
/* Push all arguments onto the stack. */
|
||||
for (argnum = 0; argnum < nargs; argnum++)
|
||||
{
|
||||
int len;
|
||||
char *val;
|
||||
|
||||
/* XXX Check this. What about UNIONS? */
|
||||
if (TYPE_CODE (VALUE_TYPE (*args)) == TYPE_CODE_STRUCT
|
||||
&& TYPE_LENGTH (VALUE_TYPE (*args)) > 8)
|
||||
{
|
||||
/* for now, pretend structs aren't special */
|
||||
/* XXX Wrong, we want a pointer to this argument. */
|
||||
len = TYPE_LENGTH (VALUE_TYPE (*args));
|
||||
val = (char *)VALUE_CONTENTS (*args);
|
||||
}
|
||||
@ -254,19 +526,27 @@ mn10300_push_arguments (nargs, args, sp, struct_return, struct_addr)
|
||||
val = (char *)VALUE_CONTENTS (*args);
|
||||
}
|
||||
|
||||
while (regsused < 2 && len > 0)
|
||||
{
|
||||
write_register (regsused, extract_unsigned_integer (val, 4));
|
||||
val += 4;
|
||||
len -= 4;
|
||||
regsused++;
|
||||
}
|
||||
|
||||
while (len > 0)
|
||||
{
|
||||
write_memory (sp + stack_offset, val, 4);
|
||||
|
||||
len -= 4;
|
||||
val += 4;
|
||||
stack_offset += 4;
|
||||
}
|
||||
|
||||
args++;
|
||||
}
|
||||
|
||||
/* printf"mn10300_push_arguments end\n"); */
|
||||
|
||||
/* Make space for the flushback area. */
|
||||
sp -= 8;
|
||||
return sp;
|
||||
}
|
||||
|
||||
@ -279,9 +559,24 @@ mn10300_push_return_address (pc, sp)
|
||||
CORE_ADDR pc;
|
||||
CORE_ADDR sp;
|
||||
{
|
||||
/* printf("mn10300_push_return_address\n"); */
|
||||
unsigned char buf[4];
|
||||
|
||||
/* write_register (RP_REGNUM, CALL_DUMMY_ADDRESS ()); */
|
||||
store_unsigned_integer (buf, 4, CALL_DUMMY_ADDRESS ());
|
||||
write_memory (sp - 4, buf, 4);
|
||||
return sp - 4;
|
||||
}
|
||||
|
||||
/* 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;
|
||||
CORE_ADDR sp;
|
||||
{
|
||||
/* The structure return address is passed as the first argument. */
|
||||
write_register (0, addr);
|
||||
return sp;
|
||||
}
|
||||
|
||||
@ -296,9 +591,14 @@ CORE_ADDR
|
||||
mn10300_frame_saved_pc (fi)
|
||||
struct frame_info *fi;
|
||||
{
|
||||
/* printf("mn10300_frame_saved_pc\n"); */
|
||||
int adjust = 0;
|
||||
|
||||
return (read_memory_integer(fi->frame - REGISTER_SIZE, REGISTER_SIZE));
|
||||
adjust += (fi->fsr.regs[2] ? 4 : 0);
|
||||
adjust += (fi->fsr.regs[3] ? 4 : 0);
|
||||
adjust += (fi->fsr.regs[6] ? 4 : 0);
|
||||
adjust += (fi->fsr.regs[7] ? 4 : 0);
|
||||
|
||||
return (read_memory_integer (fi->frame + adjust, REGISTER_SIZE));
|
||||
}
|
||||
|
||||
void
|
||||
@ -310,62 +610,59 @@ get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval)
|
||||
int regnum;
|
||||
enum lval_type *lval;
|
||||
{
|
||||
/* printf("get_saved_register\n"); */
|
||||
|
||||
generic_get_saved_register (raw_buffer, optimized, addrp,
|
||||
frame, regnum, lval);
|
||||
}
|
||||
|
||||
/* Function: init_extra_frame_info
|
||||
Setup the frame's frame pointer, pc, and frame addresses for saved
|
||||
registers. Most of the work is done in frame_chain().
|
||||
registers. Most of the work is done in mn10300_analyze_prologue().
|
||||
|
||||
Note that when we are called for the last frame (currently active frame),
|
||||
that fi->pc and fi->frame will already be setup. However, fi->frame will
|
||||
be valid only if this routine uses FP. For previous frames, fi-frame will
|
||||
always be correct (since that is derived from v850_frame_chain ()).
|
||||
always be correct. mn10300_analyze_prologue will fix fi->frame if
|
||||
it's not valid.
|
||||
|
||||
We can be called with the PC in the call dummy under two circumstances.
|
||||
First, during normal backtracing, second, while figuring out the frame
|
||||
pointer just prior to calling the target function (see run_stack_dummy).
|
||||
*/
|
||||
pointer just prior to calling the target function (see run_stack_dummy). */
|
||||
|
||||
void
|
||||
mn10300_init_extra_frame_info (fi)
|
||||
struct frame_info *fi;
|
||||
{
|
||||
struct prologue_info pi;
|
||||
struct pifsr pifsrs[NUM_REGS + 1], *pifsr;
|
||||
int reg;
|
||||
|
||||
if (fi->next)
|
||||
fi->pc = FRAME_SAVED_PC (fi->next);
|
||||
|
||||
memset (fi->fsr.regs, '\000', sizeof fi->fsr.regs);
|
||||
fi->status = 0;
|
||||
fi->stack_size = 0;
|
||||
|
||||
/* The call dummy doesn't save any registers on the stack, so we can return
|
||||
now. */
|
||||
/*
|
||||
if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame))
|
||||
return;
|
||||
mn10300_analyze_prologue (fi, 0);
|
||||
}
|
||||
|
||||
pi.pifsrs = pifsrs;
|
||||
*/
|
||||
/* This can be made more generic later. */
|
||||
static void
|
||||
set_machine_hook (filename)
|
||||
char *filename;
|
||||
{
|
||||
int i;
|
||||
|
||||
/* v850_scan_prologue (fi->pc, &pi); */
|
||||
/*
|
||||
if (!fi->next && pi.framereg == SP_REGNUM)
|
||||
fi->frame = read_register (pi.framereg) - pi.frameoffset;
|
||||
|
||||
for (pifsr = pifsrs; pifsr->framereg; pifsr++)
|
||||
if (bfd_get_mach (exec_bfd) == bfd_mach_mn10300
|
||||
|| bfd_get_mach (exec_bfd) == 0)
|
||||
{
|
||||
fi->fsr.regs[pifsr->reg] = pifsr->offset + fi->frame;
|
||||
|
||||
if (pifsr->framereg == SP_REGNUM)
|
||||
fi->fsr.regs[pifsr->reg] += pi.frameoffset;
|
||||
for (i = 0; i < NUM_REGS; i++)
|
||||
reg_names[i] = mn10300_generic_register_names[i];
|
||||
}
|
||||
*/
|
||||
/* printf("init_extra_frame_info\n"); */
|
||||
|
||||
/* start-sanitize-am33 */
|
||||
if (bfd_get_mach (exec_bfd) == bfd_mach_am33)
|
||||
{
|
||||
for (i = 0; i < NUM_REGS; i++)
|
||||
reg_names[i] = am33_register_names[i];
|
||||
}
|
||||
/* end-sanitize-am33 */
|
||||
}
|
||||
|
||||
void
|
||||
@ -374,5 +671,7 @@ _initialize_mn10300_tdep ()
|
||||
/* printf("_initialize_mn10300_tdep\n"); */
|
||||
|
||||
tm_print_insn = print_insn_mn10300;
|
||||
|
||||
specify_exec_file_hook (set_machine_hook);
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user