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/* Stack unwinding code based on dwarf2 frame info for GDB, the GNU debugger.
Copyright 2001
Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef DWARF2CFI_H
#define DWARF2CFI_H
struct frame_info;
struct context_reg
{
union
{
unsigned int reg;
long offset;
CORE_ADDR addr;
}
loc;
enum
{
REG_CTX_UNSAVED,
REG_CTX_SAVED_OFFSET,
REG_CTX_SAVED_REG,
REG_CTX_SAVED_ADDR,
REG_CTX_VALUE,
}
how;
};
/* This is the register and unwind state for a particular frame. */
struct context
{
struct context_reg *reg;
CORE_ADDR cfa;
CORE_ADDR ra;
void *lsda;
int args_size;
};
/* Return the frame address. */
CORE_ADDR cfi_read_fp ();
/* Store the frame address. */
void cfi_write_fp (CORE_ADDR val);
/* Restore the machine to the state it had before the current frame
was created. */
void cfi_pop_frame (struct frame_info *);
/* Determine the address of the calling function's frame. */
CORE_ADDR cfi_frame_chain (struct frame_info *fi);
/* Sets the pc of the frame. */
CORE_ADDR cfi_init_frame_pc (int fromleaf, struct frame_info *fi);
/* Initialize unwind context informations of the frame. */
void cfi_init_extra_frame_info (int fromleaf, struct frame_info *fi);
/* Obtain return address of the frame. */
CORE_ADDR cfi_get_ra (struct frame_info *fi);
/* Find register number REGNUM relative to FRAME and put its
(raw) contents in *RAW_BUFFER. Set *OPTIMIZED if the variable
was optimized out (and thus can't be fetched). If the variable
was fetched from memory, set *ADDRP to where it was fetched from,
otherwise it was fetched from a register.
The argument RAW_BUFFER must point to aligned memory. */
void cfi_get_saved_register (char *raw_buffer,
int *optimized,
CORE_ADDR *addrp,
struct frame_info *frame,
int regnum, enum lval_type *lval);
/* Return the register that the function uses for a frame pointer,
plus any necessary offset to be applied to the register before
any frame pointer offsets. */
void cfi_virtual_frame_pointer (CORE_ADDR pc, int *frame_regnum,
LONGEST * frame_offset);
struct context *context_alloc ();
void context_cpy (struct context *dst, struct context *src);
struct frame_state *frame_state_alloc ();
#endif
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