/* Get info from stack frames;
convert between frames, blocks, functions and pc values.
- Copyright (C) 1986, 1987, 1988, 1989 Free Software Foundation, Inc.
+ Copyright 1986, 1987, 1988, 1989, 1991 Free Software Foundation, Inc.
This file is part of GDB.
-GDB is free software; you can redistribute it and/or modify
+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 1, or (at your option)
-any later version.
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
-GDB is distributed in the hope that it will be useful,
+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 GDB; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-#include <stdio.h>
#include "defs.h"
-#include "param.h"
#include "symtab.h"
+#include "bfd.h"
+#include "symfile.h"
+#include "objfiles.h"
#include "frame.h"
#include "gdbcore.h"
#include "value.h" /* for read_register */
#include "target.h" /* for target_has_stack */
+#include "inferior.h" /* for read_pc */
-/* Required by INIT_EXTRA_FRAME_INFO on 88k. */
-#include <setjmp.h>
-#include <obstack.h>
-
-CORE_ADDR read_pc (); /* In infcmd.c */
-
-/* Start and end of object file containing the entry point.
- STARTUP_FILE_END is the first address of the next file.
- This file is assumed to be a startup file
- and frames with pc's inside it
- are treated as nonexistent.
-
- Setting these variables is necessary so that backtraces do not fly off
- the bottom of the stack. */
-CORE_ADDR startup_file_start;
-CORE_ADDR startup_file_end;
-
-/* Is ADDR outside the startup file? Note that if your machine
+/* Is ADDR inside the startup file? Note that if your machine
has a way to detect the bottom of the stack, there is no need
to call this function from FRAME_CHAIN_VALID; the reason for
doing so is that some machines have no way of detecting bottom
- of stack. */
+ of stack.
+
+ A PC of zero is always considered to be the bottom of the stack. */
+
int
-outside_startup_file (addr)
+inside_entry_file (addr)
CORE_ADDR addr;
{
- return !(addr >= startup_file_start && addr < startup_file_end);
+ if (addr == 0)
+ return 1;
+ if (symfile_objfile == 0)
+ return 0;
+ return (addr >= symfile_objfile -> ei.entry_file_lowpc &&
+ addr < symfile_objfile -> ei.entry_file_highpc);
+}
+
+/* Test a specified PC value to see if it is in the range of addresses
+ that correspond to the main() function. See comments above for why
+ we might want to do this.
+
+ Typically called from FRAME_CHAIN_VALID.
+
+ A PC of zero is always considered to be the bottom of the stack. */
+
+int
+inside_main_func (pc)
+CORE_ADDR pc;
+{
+ if (pc == 0)
+ return 1;
+ if (symfile_objfile == 0)
+ return 0;
+ return (symfile_objfile -> ei.main_func_lowpc <= pc &&
+ symfile_objfile -> ei.main_func_highpc > pc);
+}
+
+/* Test a specified PC value to see if it is in the range of addresses
+ that correspond to the process entry point function. See comments
+ in objfiles.h for why we might want to do this.
+
+ Typically called from FRAME_CHAIN_VALID.
+
+ A PC of zero is always considered to be the bottom of the stack. */
+
+int
+inside_entry_func (pc)
+CORE_ADDR pc;
+{
+ if (pc == 0)
+ return 1;
+ if (symfile_objfile == 0)
+ return 0;
+ return (symfile_objfile -> ei.entry_func_lowpc <= pc &&
+ symfile_objfile -> ei.entry_func_highpc > pc);
}
/* Address of innermost stack frame (contents of FP register) */
fci->next = (struct frame_info *) 0;
fci->prev = (struct frame_info *) 0;
fci->frame = addr;
- fci->next_frame = 0; /* Since arbitrary */
fci->pc = pc;
+ fci->signal_handler_caller = IN_SIGTRAMP (fci->pc, (char *)NULL);
#ifdef INIT_EXTRA_FRAME_INFO
- INIT_EXTRA_FRAME_INFO (fci);
+ INIT_EXTRA_FRAME_INFO (0, fci);
#endif
return fci;
FRAME fr = current_frame;
flush_cached_frames ();
if (fr)
- set_current_frame ( create_new_frame (read_register (FP_REGNUM),
- read_pc ()));
+ set_current_frame ( create_new_frame (read_fp (), read_pc ()));
}
/* Return a structure containing various interesting information
frame_info for the frame, and FRAMELESS should be set to nonzero
if it represents a frameless function invocation. */
-/* Return nonzero if the function for this frame has a prologue. Many
+/* Return nonzero if the function for this frame lacks a prologue. Many
machines can define FRAMELESS_FUNCTION_INVOCATION to just call this
function. */
if (func_start)
{
after_prologue = func_start;
+#ifdef SKIP_PROLOGUE_FRAMELESS_P
+ /* This is faster, since only care whether there *is* a prologue,
+ not how long it is. */
+ SKIP_PROLOGUE_FRAMELESS_P (after_prologue);
+#else
SKIP_PROLOGUE (after_prologue);
+#endif
return after_prologue == func_start;
}
else
return 0;
}
+/* Default a few macros that people seldom redefine. */
+
#if !defined (INIT_FRAME_PC)
#define INIT_FRAME_PC(fromleaf, prev) \
prev->pc = (fromleaf ? SAVED_PC_AFTER_CALL (prev->next) : \
prev->next ? FRAME_SAVED_PC (prev->next) : read_pc ());
#endif
+#ifndef FRAME_CHAIN_COMBINE
+#define FRAME_CHAIN_COMBINE(chain, thisframe) (chain)
+#endif
+
/* Return a structure containing various interesting information
about the frame that called NEXT_FRAME. Returns NULL
if there is no such frame. */
return 0;
address = FRAME_CHAIN_COMBINE (address, next_frame);
}
+ if (address == 0)
+ return 0;
prev = (struct frame_info *)
obstack_alloc (&frame_cache_obstack,
prev->next = next_frame;
prev->prev = (struct frame_info *) 0;
prev->frame = address;
- prev->next_frame = prev->next ? prev->next->frame : 0;
+ prev->signal_handler_caller = 0;
+
+/* This change should not be needed, FIXME! We should
+ determine whether any targets *need* INIT_FRAME_PC to happen
+ after INIT_EXTRA_FRAME_INFO and come up with a simple way to
+ express what goes on here.
+
+ INIT_EXTRA_FRAME_INFO is called from two places: create_new_frame
+ (where the PC is already set up) and here (where it isn't).
+ INIT_FRAME_PC is only called from here, always after
+ INIT_EXTRA_FRAME_INFO.
+
+ The catch is the MIPS, where INIT_EXTRA_FRAME_INFO requires the PC
+ value (which hasn't been set yet). Some other machines appear to
+ require INIT_EXTRA_FRAME_INFO before they can do INIT_FRAME_PC. Phoo.
+
+ We shouldn't need INIT_FRAME_PC_FIRST to add more complication to
+ an already overcomplicated part of GDB. gnu@cygnus.com, 15Sep92.
+
+ To answer the question, yes the sparc needs INIT_FRAME_PC after
+ INIT_EXTRA_FRAME_INFO. Suggested scheme:
+
+ SETUP_INNERMOST_FRAME()
+ Default version is just create_new_frame (read_fp ()),
+ read_pc ()). Machines with extra frame info would do that (or the
+ local equivalent) and then set the extra fields.
+ SETUP_ARBITRARY_FRAME(argc, argv)
+ Only change here is that create_new_frame would no longer init extra
+ frame info; SETUP_ARBITRARY_FRAME would have to do that.
+ INIT_PREV_FRAME(fromleaf, prev)
+ Replace INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC.
+ std_frame_pc(fromleaf, prev)
+ This is the default setting for INIT_PREV_FRAME. It just does what
+ the default INIT_FRAME_PC does. Some machines will call it from
+ INIT_PREV_FRAME (either at the beginning, the end, or in the middle).
+ Some machines won't use it.
+ kingdon@cygnus.com, 13Apr93. */
+
+#ifdef INIT_FRAME_PC_FIRST
+ INIT_FRAME_PC_FIRST (fromleaf, prev);
+#endif
#ifdef INIT_EXTRA_FRAME_INFO
- INIT_EXTRA_FRAME_INFO(prev);
+ INIT_EXTRA_FRAME_INFO(fromleaf, prev);
#endif
/* This entry is in the frame queue now, which is good since
FRAME_SAVED_PC may use that queue to figure out it's value
- (see m-sparc.h). We want the pc saved in the inferior frame. */
+ (see tm-sparc.h). We want the pc saved in the inferior frame. */
INIT_FRAME_PC(fromleaf, prev);
+ if (IN_SIGTRAMP (prev->pc, (char *)NULL))
+ prev->signal_handler_caller = 1;
+
return prev;
}
fi = get_frame_info (frame);
pc = fi->pc;
- if (fi->next_frame != 0)
+ if (fi->next != 0)
/* We are not in the innermost frame. We need to subtract one to
get the correct block, in case the call instruction was the
last instruction of the block. If there are any machines on
get_pc_function_start (pc)
CORE_ADDR pc;
{
- register struct block *bl = block_for_pc (pc);
+ register struct block *bl;
register struct symbol *symbol;
- if (bl == 0 || (symbol = block_function (bl)) == 0)
+ register struct minimal_symbol *msymbol;
+ CORE_ADDR fstart;
+
+ if ((bl = block_for_pc (pc)) != NULL &&
+ (symbol = block_function (bl)) != NULL)
+ {
+ bl = SYMBOL_BLOCK_VALUE (symbol);
+ fstart = BLOCK_START (bl);
+ }
+ else if ((msymbol = lookup_minimal_symbol_by_pc (pc)) != NULL)
{
- register int misc_index = find_pc_misc_function (pc);
- if (misc_index >= 0)
- return misc_function_vector[misc_index].address;
- return 0;
+ fstart = SYMBOL_VALUE_ADDRESS (msymbol);
}
- bl = SYMBOL_BLOCK_VALUE (symbol);
- return BLOCK_START (bl);
+ else
+ {
+ fstart = 0;
+ }
+ return (fstart);
}
/* Return the symbol for the function executing in frame FRAME. */
{
struct partial_symtab *pst;
struct symbol *f;
- int miscfunc;
+ struct minimal_symbol *msymbol;
struct partial_symbol *psb;
if (pc >= cache_pc_function_low && pc < cache_pc_function_high)
}
/* Get the information from a combination of the pst
- (static symbols), and the misc function vector (extern
+ (static symbols), and the minimal symbol table (extern
symbols). */
- miscfunc = find_pc_misc_function (pc);
+ msymbol = lookup_minimal_symbol_by_pc (pc);
psb = find_pc_psymbol (pst, pc);
- if (!psb && miscfunc == -1)
+ if (!psb && (msymbol == NULL))
{
goto return_error;
}
if (psb
- && (miscfunc == -1
- || (SYMBOL_VALUE_ADDRESS (psb)
- >= misc_function_vector[miscfunc].address)))
+ && (msymbol == NULL ||
+ (SYMBOL_VALUE_ADDRESS (psb) >= SYMBOL_VALUE_ADDRESS (msymbol))))
{
/* This case isn't being cached currently. */
if (address)
}
}
else
- /* Must be in the misc function stuff. */
+ /* Must be in the minimal symbol table. */
{
- miscfunc = find_pc_misc_function (pc);
- if (miscfunc == -1)
+ msymbol = lookup_minimal_symbol_by_pc (pc);
+ if (msymbol == NULL)
goto return_error;
}
{
- if (misc_function_vector[miscfunc].type == mf_text)
- cache_pc_function_low = misc_function_vector[miscfunc].address;
+ if (msymbol -> type == mst_text)
+ cache_pc_function_low = SYMBOL_VALUE_ADDRESS (msymbol);
else
/* It is a transfer table for Sun shared libraries. */
cache_pc_function_low = pc - FUNCTION_START_OFFSET;
}
- cache_pc_function_name = misc_function_vector[miscfunc].name;
- if (miscfunc < misc_function_count /* && FIXME mf_text again? */ )
- cache_pc_function_high = misc_function_vector[miscfunc+1].address;
+ cache_pc_function_name = SYMBOL_NAME (msymbol);
+ /* FIXME: Deal with bumping into end of minimal symbols for a given
+ objfile, and what about testing for mst_text again? */
+ if (SYMBOL_NAME (msymbol + 1) != NULL)
+ cache_pc_function_high = SYMBOL_VALUE_ADDRESS (msymbol + 1);
else
cache_pc_function_high = cache_pc_function_low + 1;
if (address)
return 1;
}
-/* Find the misc function whose address is the largest
- while being less than PC. Return its index in misc_function_vector.
- Returns -1 if PC is not in suitable range. */
-
-int
-find_pc_misc_function (pc)
- register CORE_ADDR pc;
-{
- register int lo = 0;
- register int hi = misc_function_count-1;
- register int new;
-
- /* Note that the last thing in the vector is always _etext. */
- /* Actually, "end", now that non-functions
- go on the misc_function_vector. */
-
- /* Above statement is not *always* true - fix for case where there are */
- /* no misc functions at all (ie no symbol table has been read). */
- if (hi < 0) return -1; /* no misc functions recorded */
-
- /* trivial reject range test */
- if (pc < misc_function_vector[0].address ||
- pc > misc_function_vector[hi].address)
- return -1;
-
- /* Note that the following search will not return hi if
- pc == misc_function_vector[hi].address. If "end" points to the
- first unused location, this is correct and the above test
- simply needs to be changed to
- "pc >= misc_function_vector[hi].address". */
- do {
- new = (lo + hi) >> 1;
- if (misc_function_vector[new].address == pc)
- return new; /* an exact match */
- else if (misc_function_vector[new].address > pc)
- hi = new;
- else
- lo = new;
- } while (hi-lo != 1);
-
- /* if here, we had no exact match, so return the lower choice */
- return lo;
-}
-
/* Return the innermost stack frame executing inside of the specified block,
or zero if there is no such frame. */
+#if 0 /* Currently unused */
+
FRAME
block_innermost_frame (block)
struct block *block;
}
}
+#endif /* 0 */
+
void
_initialize_blockframe ()
{
projects / deliverable / binutils-gdb.git / blobdiff