2003-05-30 01:02:53 +02:00
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/* Target-dependent mdebug code for the ALPHA architecture.
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2007-01-09 18:59:20 +01:00
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Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
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2003, 2007 Free Software Foundation, Inc.
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2003-05-30 01:02:53 +02:00
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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2007-08-23 20:08:50 +02:00
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the Free Software Foundation; either version 3 of the License, or
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2003-05-30 01:02:53 +02:00
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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2007-08-23 20:08:50 +02:00
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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2003-05-30 01:02:53 +02:00
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#include "defs.h"
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#include "frame.h"
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#include "frame-unwind.h"
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#include "frame-base.h"
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#include "symtab.h"
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#include "gdbcore.h"
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#include "block.h"
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#include "gdb_assert.h"
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#include "alpha-tdep.h"
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2004-11-06 18:18:10 +01:00
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#include "mdebugread.h"
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2003-05-30 01:02:53 +02:00
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/* FIXME: Some of this code should perhaps be merged with mips. */
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/* *INDENT-OFF* */
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/* Layout of a stack frame on the alpha:
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pdr members: | 7th ... nth arg, |
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| `pushed' by caller. |
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----------------|-------------------------------|<-- old_sp == vfp
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^ ^ ^ ^ | |
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| |localoff | Copies of 1st .. 6th |
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| | | | | argument if necessary. |
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| | | v | |
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2003-06-26 19:18:43 +02:00
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| | | --- |-------------------------------|<-- LOCALS_ADDRESS
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2003-05-30 01:02:53 +02:00
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| | | | |
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| | | | Locals and temporaries. |
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| | | |-------------------------------|
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|-fregoffset | Saved float registers. |
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| | | | F9 |
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| | | | . |
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| | | | . |
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| | | | F2 |
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| | v | |
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| | -------|-------------------------------|
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| | | |
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| | | Saved registers. |
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| | | S6 |
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|-regoffset | . |
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| | | . |
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| | | S0 |
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| | | pdr.pcreg |
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| v | |
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| ----------|-------------------------------|
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frameoffset | Argument build area, gets |
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| | called procedure. |
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v | |
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-------------|-------------------------------|<-- sp
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*/
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/* *INDENT-ON* */
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#define PROC_LOW_ADDR(proc) ((proc)->pdr.adr)
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#define PROC_FRAME_OFFSET(proc) ((proc)->pdr.frameoffset)
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#define PROC_FRAME_REG(proc) ((proc)->pdr.framereg)
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#define PROC_REG_MASK(proc) ((proc)->pdr.regmask)
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#define PROC_FREG_MASK(proc) ((proc)->pdr.fregmask)
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#define PROC_REG_OFFSET(proc) ((proc)->pdr.regoffset)
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#define PROC_FREG_OFFSET(proc) ((proc)->pdr.fregoffset)
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#define PROC_PC_REG(proc) ((proc)->pdr.pcreg)
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#define PROC_LOCALOFF(proc) ((proc)->pdr.localoff)
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/* Locate the mdebug PDR for the given PC. Return null if one can't
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be found; you'll have to fall back to other methods in that case. */
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2004-11-06 18:18:10 +01:00
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static struct mdebug_extra_func_info *
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2003-05-30 01:02:53 +02:00
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find_proc_desc (CORE_ADDR pc)
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{
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struct block *b = block_for_pc (pc);
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2004-11-06 18:18:10 +01:00
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struct mdebug_extra_func_info *proc_desc = NULL;
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2003-05-30 01:02:53 +02:00
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struct symbol *sym = NULL;
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if (b)
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{
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CORE_ADDR startaddr;
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find_pc_partial_function (pc, NULL, &startaddr, NULL);
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if (startaddr > BLOCK_START (b))
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/* This is the "pathological" case referred to in a comment in
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print_frame_info. It might be better to move this check into
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symbol reading. */
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sym = NULL;
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else
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2004-10-31 03:59:21 +01:00
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sym = lookup_symbol (MDEBUG_EFI_SYMBOL_NAME, b, LABEL_DOMAIN, 0, NULL);
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2003-05-30 01:02:53 +02:00
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}
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if (sym)
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{
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2004-11-06 18:18:10 +01:00
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proc_desc = (struct mdebug_extra_func_info *) SYMBOL_VALUE (sym);
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2003-05-30 01:02:53 +02:00
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/* If we never found a PDR for this function in symbol reading,
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then examine prologues to find the information. */
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if (proc_desc->pdr.framereg == -1)
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proc_desc = NULL;
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}
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return proc_desc;
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}
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/* This returns the PC of the first inst after the prologue. If we can't
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find the prologue, then return 0. */
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static CORE_ADDR
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2004-11-06 18:18:10 +01:00
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alpha_mdebug_after_prologue (CORE_ADDR pc, struct mdebug_extra_func_info *proc_desc)
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2003-05-30 01:02:53 +02:00
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{
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if (proc_desc)
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{
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/* If function is frameless, then we need to do it the hard way. I
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strongly suspect that frameless always means prologueless... */
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2003-06-04 18:40:50 +02:00
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if (PROC_FRAME_REG (proc_desc) == ALPHA_SP_REGNUM
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2003-05-30 01:02:53 +02:00
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&& PROC_FRAME_OFFSET (proc_desc) == 0)
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return 0;
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}
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return alpha_after_prologue (pc);
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}
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/* Return non-zero if we *might* be in a function prologue. Return zero
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if we are definitively *not* in a function prologue. */
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static int
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2004-11-06 18:18:10 +01:00
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alpha_mdebug_in_prologue (CORE_ADDR pc, struct mdebug_extra_func_info *proc_desc)
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2003-05-30 01:02:53 +02:00
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{
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CORE_ADDR after_prologue_pc = alpha_mdebug_after_prologue (pc, proc_desc);
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return (after_prologue_pc == 0 || pc < after_prologue_pc);
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}
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/* Frame unwinder that reads mdebug PDRs. */
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struct alpha_mdebug_unwind_cache
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{
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2004-11-06 18:18:10 +01:00
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struct mdebug_extra_func_info *proc_desc;
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2003-05-30 01:02:53 +02:00
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CORE_ADDR vfp;
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CORE_ADDR *saved_regs;
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};
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/* Extract all of the information about the frame from PROC_DESC
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and store the resulting register save locations in the structure. */
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static struct alpha_mdebug_unwind_cache *
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alpha_mdebug_frame_unwind_cache (struct frame_info *next_frame,
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void **this_prologue_cache)
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{
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struct alpha_mdebug_unwind_cache *info;
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2004-11-06 18:18:10 +01:00
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struct mdebug_extra_func_info *proc_desc;
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2003-05-30 01:02:53 +02:00
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ULONGEST vfp;
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CORE_ADDR pc, reg_position;
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unsigned long mask;
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int ireg, returnreg;
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if (*this_prologue_cache)
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return *this_prologue_cache;
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info = FRAME_OBSTACK_ZALLOC (struct alpha_mdebug_unwind_cache);
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*this_prologue_cache = info;
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pc = frame_pc_unwind (next_frame);
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/* ??? We don't seem to be able to cache the lookup of the PDR
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from alpha_mdebug_frame_p. It'd be nice if we could change
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the arguments to that function. Oh well. */
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proc_desc = find_proc_desc (pc);
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info->proc_desc = proc_desc;
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gdb_assert (proc_desc != NULL);
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info->saved_regs = frame_obstack_zalloc (SIZEOF_FRAME_SAVED_REGS);
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/* The VFP of the frame is at FRAME_REG+FRAME_OFFSET. */
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frame_unwind_unsigned_register (next_frame, PROC_FRAME_REG (proc_desc), &vfp);
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vfp += PROC_FRAME_OFFSET (info->proc_desc);
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info->vfp = vfp;
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/* Fill in the offsets for the registers which gen_mask says were saved. */
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reg_position = vfp + PROC_REG_OFFSET (proc_desc);
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mask = PROC_REG_MASK (proc_desc);
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returnreg = PROC_PC_REG (proc_desc);
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/* Note that RA is always saved first, regardless of its actual
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register number. */
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if (mask & (1 << returnreg))
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{
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/* Clear bit for RA so we don't save it again later. */
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mask &= ~(1 << returnreg);
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info->saved_regs[returnreg] = reg_position;
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reg_position += 8;
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}
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for (ireg = 0; ireg <= 31; ++ireg)
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if (mask & (1 << ireg))
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{
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info->saved_regs[ireg] = reg_position;
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reg_position += 8;
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}
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reg_position = vfp + PROC_FREG_OFFSET (proc_desc);
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mask = PROC_FREG_MASK (proc_desc);
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for (ireg = 0; ireg <= 31; ++ireg)
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if (mask & (1 << ireg))
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{
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2003-06-04 18:40:50 +02:00
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info->saved_regs[ALPHA_FP0_REGNUM + ireg] = reg_position;
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2003-05-30 01:02:53 +02:00
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reg_position += 8;
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}
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return info;
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}
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/* Given a GDB frame, determine the address of the calling function's
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frame. This will be used to create a new GDB frame struct. */
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static void
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alpha_mdebug_frame_this_id (struct frame_info *next_frame,
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void **this_prologue_cache,
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struct frame_id *this_id)
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{
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struct alpha_mdebug_unwind_cache *info
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= alpha_mdebug_frame_unwind_cache (next_frame, this_prologue_cache);
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* dwarf2-frame.c (dwarf2_frame_cache, dwarf2_frame_this_id)
(dwarf2_frame_sniffer): Update.
(dwarf2_signal_frame_this_id): New function.
(dwarf2_signal_frame_unwind): Use it.
(dwarf2_frame_base_sniffer): Use frame_unwind_address_in_block.
* frame.c (frame_func_unwind): Add this_type argument.
(get_frame_func): Update.
(frame_unwind_address_in_block): Add this_type argument and check it.
Fix a typo.
(get_frame_address_in_block): Update.
* frame.h (enum frame_type): Move higher in the file.
(frame_unwind_address_in_block, frame_func_unwind): Add enum frame_type
argument.
* alpha-mdebug-tdep.c, alpha-tdep.c, amd64-tdep.c, amd64obsd-tdep.c,
arm-tdep.c, avr-tdep.c, cris-tdep.c, frv-tdep.c, h8300-tdep.c,
hppa-tdep.c, i386-tdep.c, i386obsd-tdep.c, ia64-tdep.c,
libunwind-frame.c, m32c-tdep.c, m32r-linux-tdep.c, m32r-tdep.c,
m68hc11-tdep.c, m68k-tdep.c, m88k-tdep.c, mips-mdebug-tdep.c,
mips-tdep.c, mn10300-tdep.c, mt-tdep.c, rs6000-tdep.c, s390-tdep.c,
score-tdep.c, sh-tdep.c, sh64-tdep.c, sparc-tdep.c,
sparc64obsd-tdep.c, spu-tdep.c, v850-tdep.c, vax-tdep.c,
xstormy16-tdep.c, xtensa-tdep.c: Update calls to
frame_func_unwind and frame_unwind_address_in_block to specify
the frame type. Use frame_unwind_address_in_block instead of
frame_pc_unwind in sniffers.
* gdb.arch/i386-signal.c, gdb.arch/i386-signal.exp: New files.
2007-02-27 21:17:19 +01:00
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*this_id = frame_id_build (info->vfp,
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frame_func_unwind (next_frame, NORMAL_FRAME));
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2003-05-30 01:02:53 +02:00
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}
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/* Retrieve the value of REGNUM in FRAME. Don't give up! */
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static void
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alpha_mdebug_frame_prev_register (struct frame_info *next_frame,
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void **this_prologue_cache,
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int regnum, int *optimizedp,
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enum lval_type *lvalp, CORE_ADDR *addrp,
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2005-06-12 14:53:55 +02:00
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int *realnump, gdb_byte *bufferp)
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2003-05-30 01:02:53 +02:00
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{
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struct alpha_mdebug_unwind_cache *info
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= alpha_mdebug_frame_unwind_cache (next_frame, this_prologue_cache);
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/* The PC of the previous frame is stored in the link register of
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the current frame. Frob regnum so that we pull the value from
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the correct place. */
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2003-06-04 18:40:50 +02:00
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if (regnum == ALPHA_PC_REGNUM)
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2003-05-30 01:02:53 +02:00
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regnum = PROC_PC_REG (info->proc_desc);
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/* For all registers known to be saved in the current frame,
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do the obvious and pull the value out. */
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if (info->saved_regs[regnum])
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{
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*optimizedp = 0;
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*lvalp = lval_memory;
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|
|
|
|
*addrp = info->saved_regs[regnum];
|
|
|
|
|
*realnump = -1;
|
|
|
|
|
if (bufferp != NULL)
|
2003-06-04 18:44:29 +02:00
|
|
|
|
get_frame_memory (next_frame, *addrp, bufferp, ALPHA_REGISTER_SIZE);
|
2003-05-30 01:02:53 +02:00
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* The stack pointer of the previous frame is computed by popping
|
|
|
|
|
the current stack frame. */
|
2003-06-04 18:40:50 +02:00
|
|
|
|
if (regnum == ALPHA_SP_REGNUM)
|
2003-05-30 01:02:53 +02:00
|
|
|
|
{
|
|
|
|
|
*optimizedp = 0;
|
|
|
|
|
*lvalp = not_lval;
|
|
|
|
|
*addrp = 0;
|
|
|
|
|
*realnump = -1;
|
|
|
|
|
if (bufferp != NULL)
|
|
|
|
|
store_unsigned_integer (bufferp, ALPHA_REGISTER_SIZE, info->vfp);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Otherwise assume the next frame has the same register value. */
|
2007-01-09 21:19:15 +01:00
|
|
|
|
*optimizedp = 0;
|
|
|
|
|
*lvalp = lval_register;
|
|
|
|
|
*addrp = 0;
|
|
|
|
|
*realnump = regnum;
|
|
|
|
|
if (bufferp)
|
|
|
|
|
frame_unwind_register (next_frame, *realnump, bufferp);
|
2003-05-30 01:02:53 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static const struct frame_unwind alpha_mdebug_frame_unwind = {
|
|
|
|
|
NORMAL_FRAME,
|
|
|
|
|
alpha_mdebug_frame_this_id,
|
|
|
|
|
alpha_mdebug_frame_prev_register
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
const struct frame_unwind *
|
2003-07-17 00:29:13 +02:00
|
|
|
|
alpha_mdebug_frame_sniffer (struct frame_info *next_frame)
|
2003-05-30 01:02:53 +02:00
|
|
|
|
{
|
* dwarf2-frame.c (dwarf2_frame_cache, dwarf2_frame_this_id)
(dwarf2_frame_sniffer): Update.
(dwarf2_signal_frame_this_id): New function.
(dwarf2_signal_frame_unwind): Use it.
(dwarf2_frame_base_sniffer): Use frame_unwind_address_in_block.
* frame.c (frame_func_unwind): Add this_type argument.
(get_frame_func): Update.
(frame_unwind_address_in_block): Add this_type argument and check it.
Fix a typo.
(get_frame_address_in_block): Update.
* frame.h (enum frame_type): Move higher in the file.
(frame_unwind_address_in_block, frame_func_unwind): Add enum frame_type
argument.
* alpha-mdebug-tdep.c, alpha-tdep.c, amd64-tdep.c, amd64obsd-tdep.c,
arm-tdep.c, avr-tdep.c, cris-tdep.c, frv-tdep.c, h8300-tdep.c,
hppa-tdep.c, i386-tdep.c, i386obsd-tdep.c, ia64-tdep.c,
libunwind-frame.c, m32c-tdep.c, m32r-linux-tdep.c, m32r-tdep.c,
m68hc11-tdep.c, m68k-tdep.c, m88k-tdep.c, mips-mdebug-tdep.c,
mips-tdep.c, mn10300-tdep.c, mt-tdep.c, rs6000-tdep.c, s390-tdep.c,
score-tdep.c, sh-tdep.c, sh64-tdep.c, sparc-tdep.c,
sparc64obsd-tdep.c, spu-tdep.c, v850-tdep.c, vax-tdep.c,
xstormy16-tdep.c, xtensa-tdep.c: Update calls to
frame_func_unwind and frame_unwind_address_in_block to specify
the frame type. Use frame_unwind_address_in_block instead of
frame_pc_unwind in sniffers.
* gdb.arch/i386-signal.c, gdb.arch/i386-signal.exp: New files.
2007-02-27 21:17:19 +01:00
|
|
|
|
CORE_ADDR pc = frame_unwind_address_in_block (next_frame, NORMAL_FRAME);
|
2004-11-06 18:18:10 +01:00
|
|
|
|
struct mdebug_extra_func_info *proc_desc;
|
2003-05-30 01:02:53 +02:00
|
|
|
|
|
|
|
|
|
/* If this PC does not map to a PDR, then clearly this isn't an
|
|
|
|
|
mdebug frame. */
|
|
|
|
|
proc_desc = find_proc_desc (pc);
|
|
|
|
|
if (proc_desc == NULL)
|
|
|
|
|
return NULL;
|
|
|
|
|
|
2003-05-31 02:27:46 +02:00
|
|
|
|
/* If we're in the prologue, the PDR for this frame is not yet valid.
|
|
|
|
|
Say no here and we'll fall back on the heuristic unwinder. */
|
|
|
|
|
if (alpha_mdebug_in_prologue (pc, proc_desc))
|
|
|
|
|
return NULL;
|
|
|
|
|
|
2003-05-30 01:02:53 +02:00
|
|
|
|
return &alpha_mdebug_frame_unwind;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static CORE_ADDR
|
|
|
|
|
alpha_mdebug_frame_base_address (struct frame_info *next_frame,
|
|
|
|
|
void **this_prologue_cache)
|
|
|
|
|
{
|
|
|
|
|
struct alpha_mdebug_unwind_cache *info
|
|
|
|
|
= alpha_mdebug_frame_unwind_cache (next_frame, this_prologue_cache);
|
|
|
|
|
|
2003-05-31 02:27:46 +02:00
|
|
|
|
return info->vfp;
|
2003-05-30 01:02:53 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static CORE_ADDR
|
|
|
|
|
alpha_mdebug_frame_locals_address (struct frame_info *next_frame,
|
|
|
|
|
void **this_prologue_cache)
|
|
|
|
|
{
|
|
|
|
|
struct alpha_mdebug_unwind_cache *info
|
|
|
|
|
= alpha_mdebug_frame_unwind_cache (next_frame, this_prologue_cache);
|
|
|
|
|
|
2003-05-31 02:27:46 +02:00
|
|
|
|
return info->vfp - PROC_LOCALOFF (info->proc_desc);
|
2003-05-30 01:02:53 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static CORE_ADDR
|
|
|
|
|
alpha_mdebug_frame_args_address (struct frame_info *next_frame,
|
|
|
|
|
void **this_prologue_cache)
|
|
|
|
|
{
|
|
|
|
|
struct alpha_mdebug_unwind_cache *info
|
|
|
|
|
= alpha_mdebug_frame_unwind_cache (next_frame, this_prologue_cache);
|
|
|
|
|
|
2003-05-31 02:27:46 +02:00
|
|
|
|
return info->vfp - ALPHA_NUM_ARG_REGS * 8;
|
2003-05-30 01:02:53 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static const struct frame_base alpha_mdebug_frame_base = {
|
|
|
|
|
&alpha_mdebug_frame_unwind,
|
|
|
|
|
alpha_mdebug_frame_base_address,
|
|
|
|
|
alpha_mdebug_frame_locals_address,
|
|
|
|
|
alpha_mdebug_frame_args_address
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static const struct frame_base *
|
2003-07-17 00:29:13 +02:00
|
|
|
|
alpha_mdebug_frame_base_sniffer (struct frame_info *next_frame)
|
2003-05-30 01:02:53 +02:00
|
|
|
|
{
|
* dwarf2-frame.c (dwarf2_frame_cache, dwarf2_frame_this_id)
(dwarf2_frame_sniffer): Update.
(dwarf2_signal_frame_this_id): New function.
(dwarf2_signal_frame_unwind): Use it.
(dwarf2_frame_base_sniffer): Use frame_unwind_address_in_block.
* frame.c (frame_func_unwind): Add this_type argument.
(get_frame_func): Update.
(frame_unwind_address_in_block): Add this_type argument and check it.
Fix a typo.
(get_frame_address_in_block): Update.
* frame.h (enum frame_type): Move higher in the file.
(frame_unwind_address_in_block, frame_func_unwind): Add enum frame_type
argument.
* alpha-mdebug-tdep.c, alpha-tdep.c, amd64-tdep.c, amd64obsd-tdep.c,
arm-tdep.c, avr-tdep.c, cris-tdep.c, frv-tdep.c, h8300-tdep.c,
hppa-tdep.c, i386-tdep.c, i386obsd-tdep.c, ia64-tdep.c,
libunwind-frame.c, m32c-tdep.c, m32r-linux-tdep.c, m32r-tdep.c,
m68hc11-tdep.c, m68k-tdep.c, m88k-tdep.c, mips-mdebug-tdep.c,
mips-tdep.c, mn10300-tdep.c, mt-tdep.c, rs6000-tdep.c, s390-tdep.c,
score-tdep.c, sh-tdep.c, sh64-tdep.c, sparc-tdep.c,
sparc64obsd-tdep.c, spu-tdep.c, v850-tdep.c, vax-tdep.c,
xstormy16-tdep.c, xtensa-tdep.c: Update calls to
frame_func_unwind and frame_unwind_address_in_block to specify
the frame type. Use frame_unwind_address_in_block instead of
frame_pc_unwind in sniffers.
* gdb.arch/i386-signal.c, gdb.arch/i386-signal.exp: New files.
2007-02-27 21:17:19 +01:00
|
|
|
|
CORE_ADDR pc = frame_unwind_address_in_block (next_frame, NORMAL_FRAME);
|
2004-11-06 18:18:10 +01:00
|
|
|
|
struct mdebug_extra_func_info *proc_desc;
|
2003-05-30 01:02:53 +02:00
|
|
|
|
|
|
|
|
|
/* If this PC does not map to a PDR, then clearly this isn't an
|
|
|
|
|
mdebug frame. */
|
|
|
|
|
proc_desc = find_proc_desc (pc);
|
|
|
|
|
if (proc_desc == NULL)
|
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
|
|
return &alpha_mdebug_frame_base;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
alpha_mdebug_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
|
|
|
|
{
|
|
|
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
|
|
|
|
|
2003-07-17 00:29:13 +02:00
|
|
|
|
frame_unwind_append_sniffer (gdbarch, alpha_mdebug_frame_sniffer);
|
|
|
|
|
frame_base_append_sniffer (gdbarch, alpha_mdebug_frame_base_sniffer);
|
2003-05-30 01:02:53 +02:00
|
|
|
|
}
|