binutils-gdb/gdb/trad-frame.c

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/* Traditional frame unwind support, for GDB the GNU Debugger.
Copyright 2003, 2004 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. */
#include "defs.h"
#include "frame.h"
#include "trad-frame.h"
#include "regcache.h"
struct trad_frame_cache
{
struct frame_info *next_frame;
CORE_ADDR this_base;
struct trad_frame_saved_reg *prev_regs;
struct frame_id this_id;
};
struct trad_frame_cache *
trad_frame_cache_zalloc (struct frame_info *next_frame)
{
struct trad_frame_cache *this_trad_cache;
this_trad_cache = FRAME_OBSTACK_ZALLOC (struct trad_frame_cache);
this_trad_cache->prev_regs = trad_frame_alloc_saved_regs (next_frame);
this_trad_cache->next_frame = next_frame;
return this_trad_cache;
}
/* A traditional frame is unwound by analysing the function prologue
and using the information gathered to track registers. For
non-optimized frames, the technique is reliable (just need to check
for all potential instruction sequences). */
struct trad_frame_saved_reg *
trad_frame_alloc_saved_regs (struct frame_info *next_frame)
{
int regnum;
struct gdbarch *gdbarch = get_frame_arch (next_frame);
int numregs = NUM_REGS + NUM_PSEUDO_REGS;
struct trad_frame_saved_reg *this_saved_regs
= FRAME_OBSTACK_CALLOC (numregs, struct trad_frame_saved_reg);
for (regnum = 0; regnum < numregs; regnum++)
{
this_saved_regs[regnum].realreg = regnum;
this_saved_regs[regnum].addr = -1;
}
return this_saved_regs;
}
enum { REG_VALUE = -1, REG_UNKNOWN = -2 };
int
trad_frame_value_p (struct trad_frame_saved_reg this_saved_regs[], int regnum)
{
return (this_saved_regs[regnum].realreg == REG_VALUE);
}
int
trad_frame_addr_p (struct trad_frame_saved_reg this_saved_regs[], int regnum)
{
return (this_saved_regs[regnum].realreg >= 0
&& this_saved_regs[regnum].addr != -1);
}
int
trad_frame_realreg_p (struct trad_frame_saved_reg this_saved_regs[],
int regnum)
{
return (this_saved_regs[regnum].realreg >= 0
&& this_saved_regs[regnum].addr == -1);
}
void
trad_frame_set_value (struct trad_frame_saved_reg this_saved_regs[],
int regnum, LONGEST val)
{
/* Make the REALREG invalid, indicating that the ADDR contains the
register's value. */
this_saved_regs[regnum].realreg = REG_VALUE;
this_saved_regs[regnum].addr = val;
}
void
trad_frame_set_reg_value (struct trad_frame_cache *this_trad_cache,
int regnum, LONGEST val)
{
/* External interface for users of trad_frame_cache
(who cannot access the prev_regs object directly). */
trad_frame_set_value (this_trad_cache->prev_regs, regnum, val);
}
void
trad_frame_set_reg_realreg (struct trad_frame_cache *this_trad_cache,
int regnum, int realreg)
{
this_trad_cache->prev_regs[regnum].realreg = realreg;
this_trad_cache->prev_regs[regnum].addr = -1;
}
void
trad_frame_set_reg_addr (struct trad_frame_cache *this_trad_cache,
int regnum, CORE_ADDR addr)
{
this_trad_cache->prev_regs[regnum].addr = addr;
}
void
trad_frame_set_unknown (struct trad_frame_saved_reg this_saved_regs[],
int regnum)
{
/* Make the REALREG invalid, indicating that the value is not known. */
this_saved_regs[regnum].realreg = REG_UNKNOWN;
this_saved_regs[regnum].addr = -1;
}
void
2004-07-31 Andrew Cagney <cagney@gnu.org> * trad-frame.c (trad_frame_get_prev_register): Rename trad_frame_get_prev_register. * vax-tdep.c (vax_frame_prev_register): Update. * trad-frame.h: Update. * trad-frame.c (trad_frame_get_register): Update. * sparcobsd-tdep.c (sparc32obsd_frame_prev_register): Update. * sparcnbsd-tdep.c (sparc32nbsd_sigcontext_frame_prev_register): Update. * sparc64obsd-tdep.c (sparc64obsd_frame_prev_register): Update. * sparc64nbsd-tdep.c (sparc64nbsd_sigcontext_frame_prev_register): Update. * sparc64fbsd-tdep.c (sparc64fbsd_sigtramp_frame_prev_register): Update. * sparc64-sol2-tdep.c (sparc64_sol2_sigtramp_frame_prev_register): Update. * sparc-sol2-tdep.c (sparc32_sol2_sigtramp_frame_prev_register): Update. * sparc-linux-tdep.c (sparc32_linux_sigtramp_frame_prev_register): Update. * s390-tdep.c (s390_frame_prev_register) (s390_stub_frame_prev_register) (s390_sigtramp_frame_prev_register): Update. * rs6000-tdep.c (rs6000_frame_prev_register): Update. * ppc-linux-tdep.c (ppc_linux_sigtramp_prev_register): Update. * mips-tdep.c (mips_mdebug_frame_prev_register): Update. * m88k-tdep.c (m88k_frame_prev_register) * m68hc11-tdep.c (m68hc11_frame_prev_register) * m32r-tdep.c (m32r_frame_prev_register): Update. * hppa-tdep.c (hppa_frame_prev_register_helper) * frv-tdep.c (frv_frame_prev_register): Update. * d10v-tdep.c (d10v_frame_prev_register): Update. * cris-tdep.c (cris_frame_prev_register): Update. * avr-tdep.c (avr_frame_prev_register): Update. * arm-tdep.c (arm_prologue_prev_register) (arm_sigtramp_prev_register): Update.
2004-07-31 23:53:17 +02:00
trad_frame_get_prev_register (struct frame_info *next_frame,
struct trad_frame_saved_reg this_saved_regs[],
int regnum, int *optimizedp,
enum lval_type *lvalp, CORE_ADDR *addrp,
int *realregp, gdb_byte *bufferp)
{
struct gdbarch *gdbarch = get_frame_arch (next_frame);
if (trad_frame_addr_p (this_saved_regs, regnum))
{
/* The register was saved in memory. */
*optimizedp = 0;
*lvalp = lval_memory;
*addrp = this_saved_regs[regnum].addr;
*realregp = -1;
if (bufferp != NULL)
{
/* Read the value in from memory. */
get_frame_memory (next_frame, this_saved_regs[regnum].addr, bufferp,
register_size (gdbarch, regnum));
}
}
else if (trad_frame_realreg_p (this_saved_regs, regnum))
{
*optimizedp = 0;
*lvalp = lval_register;
*addrp = 0;
*realregp = this_saved_regs[regnum].realreg;
/* Ask the next frame to return the value of the register. */
if (bufferp)
frame_unwind_register (next_frame, (*realregp), bufferp);
}
else if (trad_frame_value_p (this_saved_regs, regnum))
{
/* The register's value is available. */
*optimizedp = 0;
*lvalp = not_lval;
*addrp = 0;
*realregp = -1;
if (bufferp != NULL)
store_unsigned_integer (bufferp, register_size (gdbarch, regnum),
this_saved_regs[regnum].addr);
}
else
{
2005-02-10 Andrew Cagney <cagney@gnu.org> Mark up all error and warning messages. * ada-lang.c, amd64-tdep.c, arch-utils.c, breakpoint.c: Update. * bsd-kvm.c, bsd-uthread.c, coff-solib.h, coffread.c: Update. * core-aout.c, core-regset.c, corefile.c, corelow.c: Update. * cp-abi.c, cp-support.c, cp-valprint.c, cris-tdep.c: Update. * dbxread.c, demangle.c, doublest.c, dsrec.c: Update. * dve3900-rom.c, dwarf2expr.c, dwarf2loc.c: Update. * dwarf2read.c, dwarfread.c, elfread.c, eval.c: Update. * event-top.c, exec.c, expprint.c, f-lang.c: Update. * f-typeprint.c, f-valprint.c, fbsd-nat.c, findvar.c: Update. * frame.c, frv-linux-tdep.c, gcore.c, gdbtypes.c: Update. * gnu-nat.c, gnu-v2-abi.c, gnu-v3-abi.c, go32-nat.c: Update. * hpacc-abi.c, hppa-hpux-nat.c, hppa-hpux-tdep.c: Update. * hppa-linux-nat.c, hppa-linux-tdep.c, hppa-tdep.c: Update. * hpread.c, hpux-thread.c, i386-linux-nat.c: Update. * i386-linux-tdep.c, i386-tdep.c, i386bsd-nat.c: Update. * i386gnu-nat.c, i387-tdep.c, ia64-linux-nat.c: Update. * ia64-tdep.c, inf-child.c, inf-ptrace.c, inf-ttrace.c: Update. * infcall.c, infcmd.c, inflow.c, infptrace.c, infrun.c: Update. * inftarg.c, interps.c, irix5-nat.c, jv-lang.c: Update. * kod-cisco.c, kod.c, language.c, libunwind-frame.c: Update. * linespec.c, linux-nat.c, linux-thread-db.c, m2-lang.c: Update. * m32r-rom.c, m68hc11-tdep.c, m68k-tdep.c: Update. * m68klinux-nat.c, macrocmd.c, macroexp.c, main.c: Update. * maint.c, mdebugread.c, mem-break.c, memattr.c: Update. * mips-linux-tdep.c, mips-tdep.c, mipsread.c, monitor.c: Update. * nlmread.c, nto-procfs.c, objc-lang.c, objfiles.c: Update. * observer.c, ocd.c, p-lang.c, p-typeprint.c: Update. * p-valprint.c, pa64solib.c, parse.c, ppc-linux-tdep.c: Update. * ppcnbsd-tdep.c, printcmd.c, procfs.c, remote-e7000.c: Update. * remote-fileio.c, remote-m32r-sdi.c, remote-rdi.c: Update. * remote-rdp.c, remote-sim.c, remote-st.c: Update. * remote-utils.c, remote-utils.h, remote.c: Update. * rom68k-rom.c, rs6000-nat.c, s390-tdep.c, scm-lang.c: Update. * ser-e7kpc.c, ser-tcp.c, ser-unix.c, sh-tdep.c: Update. * sh3-rom.c, shnbsd-tdep.c, sol-thread.c, solib-aix5.c: Update. * solib-frv.c, solib-irix.c, solib-osf.c, solib-pa64.c: Update. * solib-som.c, solib-sunos.c, solib-svr4.c, solib.c: Update. * somread.c, somsolib.c, source.c, stabsread.c: Update. * stack.c, std-regs.c, symfile-mem.c, symfile.c: Update. * symmisc.c, symtab.c, target.c, thread.c, top.c: Update. * tracepoint.c, trad-frame.c, typeprint.c, utils.c: Update. * uw-thread.c, valarith.c, valops.c, valprint.c: Update. * value.c, varobj.c, version.in, win32-nat.c, wince.c: Update. * xcoffread.c, xcoffsolib.c, cli/cli-cmds.c: Update. * cli/cli-decode.c, cli/cli-dump.c, cli/cli-logging.c: Update. * cli/cli-script.c, cli/cli-setshow.c, mi/mi-cmd-break.c: Update. * mi/mi-cmd-disas.c, mi/mi-cmd-env.c, mi/mi-cmd-file.c: Update. * mi/mi-cmd-stack.c, mi/mi-cmd-var.c, mi/mi-getopt.c: Update. * mi/mi-symbol-cmds.c, tui/tui-layout.c, tui/tui-stack.c: Update. * tui/tui-win.c: Update.
2005-02-11 05:06:14 +01:00
error (_("Register %s not available"),
gdbarch_register_name (gdbarch, regnum));
}
}
void
trad_frame_get_register (struct trad_frame_cache *this_trad_cache,
struct frame_info *next_frame,
int regnum, int *optimizedp,
enum lval_type *lvalp, CORE_ADDR *addrp,
int *realregp, gdb_byte *bufferp)
{
2004-07-31 Andrew Cagney <cagney@gnu.org> * trad-frame.c (trad_frame_get_prev_register): Rename trad_frame_get_prev_register. * vax-tdep.c (vax_frame_prev_register): Update. * trad-frame.h: Update. * trad-frame.c (trad_frame_get_register): Update. * sparcobsd-tdep.c (sparc32obsd_frame_prev_register): Update. * sparcnbsd-tdep.c (sparc32nbsd_sigcontext_frame_prev_register): Update. * sparc64obsd-tdep.c (sparc64obsd_frame_prev_register): Update. * sparc64nbsd-tdep.c (sparc64nbsd_sigcontext_frame_prev_register): Update. * sparc64fbsd-tdep.c (sparc64fbsd_sigtramp_frame_prev_register): Update. * sparc64-sol2-tdep.c (sparc64_sol2_sigtramp_frame_prev_register): Update. * sparc-sol2-tdep.c (sparc32_sol2_sigtramp_frame_prev_register): Update. * sparc-linux-tdep.c (sparc32_linux_sigtramp_frame_prev_register): Update. * s390-tdep.c (s390_frame_prev_register) (s390_stub_frame_prev_register) (s390_sigtramp_frame_prev_register): Update. * rs6000-tdep.c (rs6000_frame_prev_register): Update. * ppc-linux-tdep.c (ppc_linux_sigtramp_prev_register): Update. * mips-tdep.c (mips_mdebug_frame_prev_register): Update. * m88k-tdep.c (m88k_frame_prev_register) * m68hc11-tdep.c (m68hc11_frame_prev_register) * m32r-tdep.c (m32r_frame_prev_register): Update. * hppa-tdep.c (hppa_frame_prev_register_helper) * frv-tdep.c (frv_frame_prev_register): Update. * d10v-tdep.c (d10v_frame_prev_register): Update. * cris-tdep.c (cris_frame_prev_register): Update. * avr-tdep.c (avr_frame_prev_register): Update. * arm-tdep.c (arm_prologue_prev_register) (arm_sigtramp_prev_register): Update.
2004-07-31 23:53:17 +02:00
trad_frame_get_prev_register (next_frame, this_trad_cache->prev_regs,
regnum, optimizedp, lvalp, addrp, realregp,
bufferp);
}
void
trad_frame_set_id (struct trad_frame_cache *this_trad_cache,
struct frame_id this_id)
{
this_trad_cache->this_id = this_id;
}
void
trad_frame_get_id (struct trad_frame_cache *this_trad_cache,
struct frame_id *this_id)
{
(*this_id) = this_trad_cache->this_id;
}
void
trad_frame_set_this_base (struct trad_frame_cache *this_trad_cache,
CORE_ADDR this_base)
{
this_trad_cache->this_base = this_base;
}
CORE_ADDR
trad_frame_get_this_base (struct trad_frame_cache *this_trad_cache)
{
return this_trad_cache->this_base;
}