old-cross-binutils/gdb/arm-tdep.c

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/* Target-dependent code for the Acorn Risc Machine, for GDB, the GNU Debugger.
Copyright 1988, 1989, 1991, 1992, 1993, 1995 Free Software Foundation, Inc.
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This file is part of GDB.
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
the Free Software Foundation; either version 2 of the License, or
(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
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "defs.h"
#include "frame.h"
#include "inferior.h"
#if 0
#include "gdbcore.h"
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#include <sys/param.h>
#include <sys/dir.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <sys/ptrace.h>
#include <machine/reg.h>
#define N_TXTADDR(hdr) 0x8000
#define N_DATADDR(hdr) (hdr.a_text + 0x8000)
#include <sys/user.h> /* After a.out.h */
#include <sys/file.h>
* configure.in: Check for working mmap, ansi headers, string.h, strings.h, and memory.h. * configure: Regenerated. * gdb_stat.h: New file, "portable" <sys/stat.h>. * gdb_string.h: New file, "portable" <string.h>. * altos-xdep.c, arm-tdep.c, arm-xdep.c, convex-tdep.c, convex-xdep.c, coredep.c, cxux-nat.c, dbxread.c, exec.c, gould-xdep.c, hppa-tdep.c, i386aix-nat.c, i386b-nat.c, i386mach-nat.c, i386v-nat.c, infptrace.c, m88k-nat.c, main.c, mdebugread.c, objfiles.c, os9kread.c, procfs.c, pyr-xdep.c, rs6000-nat.c, source.c, standalone.c, stuff.c, sun386-nat.c, symfile.c, symm-nat.c, symm-tdep.c, symtab.c, top.c, ultra3-nat.c, ultra3-xdep.c, umax-xdep.c, xcoffread.c: Include "gdb_stat.h" instead of <sys/stat.h>. * alpha-tdep.c, breakpoint.c, buildsym.c, c-typeprint.c, ch-typeprint.c, coffread.c, command.c, core-sol2.c, core-svr4.c, core.c, corelow.c, cp-valprint.c, dbxread.c, dcache.c, demangle.c, dpx2-nat.c, dstread.c, dwarfread.c, elfread.c, environ.c, eval.c, exec.c, f-lang.c, f-typeprint.c, f-valprint.c, findvar.c, fork-child.c, gdbtypes.c, hpread.c, i386-tdep.c, infcmd.c, inflow.c, infptrace.c, infrun.c, irix5-nat.c, language.c, m2-typeprint.c, main.c, mdebugread.c, minsyms.c, mipsread.c, monitor.c, nlmread.c, objfiles.c, os9kread.c, osfsolib.c, parse.c, printcmd.c, procfs.c, regex.c, remote-adapt.c, remote-arc.c, remote-array.c, remote-bug.c, remote-e7000.c, remote-eb.c, remote-es.c, remote-hms.c, remote-mm.c, remote-os9k.c, remote-pa.c, remote-sim.c, remote-st.c, remote-udi.c, remote-utils.c, remote-vx.c, remote-vx29k.c, remote-vx68.c, remote-vx960.c, remote-vxmips.c, remote-vxsparc.c, remote.c, solib.c, somread.c, source.c, stabsread.c, stack.c, symfile.c, symmisc.c, symtab.c, target.c, top.c, typeprint.c, utils.c, valarith.c, valops.c, valprint.c, values.c, xcoffread.c: Include "gdb_string.h" instead of <string.h>. * gdbtk.c: Likewise. * config/xm-sysv4.h, i386/xm-ptx.h, m68k/xm-sun3os4.h, sparc/xm-sun4os4.h (HAVE_MMAP): Removed. * config/xm-lynx.h, config/i386/xm-ptx.h, config/m68k/nm-apollo68b.h, config/m68k/xm-hp300hpux.h, config/mips/xm-irix3.h, config/mips/xm-mips.h, config/mips/xm-news-mips.h, config/mips/xm-riscos.h, config/pa/hppah.h, config/rs6000/xm-rs6000.h, config/sparc/xm-sun4os4.h, config/sparc/xm-sun4sol2.h, config/vax/xm-vaxbsd.h, config/vax/xm-vaxult.h, config/vax/xm-vaxult2.h (MEM_FNS_DECLARED): Removed. * config/mips/xm-irix3.h, config/mips/xm-mips.h, config/pa/xm-hppah.h (memcpy, memset): Removed declarations.
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#include "gdb_stat.h"
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#include <errno.h>
#endif
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#if 0
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/* Work with core dump and executable files, for GDB.
This code would be in core.c if it weren't machine-dependent. */
/* Structure to describe the chain of shared libraries used
by the execfile.
e.g. prog shares Xt which shares X11 which shares c. */
struct shared_library {
struct exec_header header;
char name[SHLIBLEN];
CORE_ADDR text_start; /* CORE_ADDR of 1st byte of text, this file */
long data_offset; /* offset of data section in file */
int chan; /* file descriptor for the file */
struct shared_library *shares; /* library this one shares */
};
static struct shared_library *shlib = 0;
/* Hook for `exec_file_command' command to call. */
extern void (*exec_file_display_hook) ();
static CORE_ADDR unshared_text_start;
/* extended header from exec file (for shared library info) */
static struct exec_header exec_header;
void
exec_file_command (filename, from_tty)
char *filename;
int from_tty;
{
int val;
/* Eliminate all traces of old exec file.
Mark text segment as empty. */
if (execfile)
free (execfile);
execfile = 0;
data_start = 0;
data_end -= exec_data_start;
text_start = 0;
unshared_text_start = 0;
text_end = 0;
exec_data_start = 0;
exec_data_end = 0;
if (execchan >= 0)
close (execchan);
execchan = -1;
if (shlib) {
close_shared_library(shlib);
shlib = 0;
}
/* Now open and digest the file the user requested, if any. */
if (filename)
{
filename = tilde_expand (filename);
make_cleanup (free, filename);
execchan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0,
&execfile);
if (execchan < 0)
perror_with_name (filename);
{
struct stat st_exec;
#ifdef HEADER_SEEK_FD
HEADER_SEEK_FD (execchan);
#endif
val = myread (execchan, &exec_header, sizeof exec_header);
exec_aouthdr = exec_header.a_exec;
if (val < 0)
perror_with_name (filename);
text_start = 0x8000;
/* Look for shared library if needed */
if (exec_header.a_exec.a_magic & MF_USES_SL)
shlib = open_shared_library(exec_header.a_shlibname, text_start);
text_offset = N_TXTOFF (exec_aouthdr);
exec_data_offset = N_TXTOFF (exec_aouthdr) + exec_aouthdr.a_text;
if (shlib) {
unshared_text_start = shared_text_end(shlib) & ~0x7fff;
stack_start = shlib->header.a_exec.a_sldatabase;
stack_end = STACK_END_ADDR;
} else
unshared_text_start = 0x8000;
text_end = unshared_text_start + exec_aouthdr.a_text;
exec_data_start = unshared_text_start + exec_aouthdr.a_text;
exec_data_end = exec_data_start + exec_aouthdr.a_data;
data_start = exec_data_start;
data_end += exec_data_start;
fstat (execchan, &st_exec);
exec_mtime = st_exec.st_mtime;
}
validate_files ();
}
else if (from_tty)
printf ("No exec file now.\n");
/* Tell display code (if any) about the changed file name. */
if (exec_file_display_hook)
(*exec_file_display_hook) (filename);
}
#endif
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#if 0
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/* Read from the program's memory (except for inferior processes).
This function is misnamed, since it only reads, never writes; and
since it will use the core file and/or executable file as necessary.
It should be extended to write as well as read, FIXME, for patching files.
Return 0 if address could be read, EIO if addresss out of bounds. */
int
xfer_core_file (memaddr, myaddr, len)
CORE_ADDR memaddr;
char *myaddr;
int len;
{
register int i;
register int val;
int xferchan;
char **xferfile;
int fileptr;
int returnval = 0;
while (len > 0)
{
xferfile = 0;
xferchan = 0;
/* Determine which file the next bunch of addresses reside in,
and where in the file. Set the file's read/write pointer
to point at the proper place for the desired address
and set xferfile and xferchan for the correct file.
If desired address is nonexistent, leave them zero.
i is set to the number of bytes that can be handled
along with the next address.
We put the most likely tests first for efficiency. */
/* Note that if there is no core file
data_start and data_end are equal. */
if (memaddr >= data_start && memaddr < data_end)
{
i = min (len, data_end - memaddr);
fileptr = memaddr - data_start + data_offset;
xferfile = &corefile;
xferchan = corechan;
}
/* Note that if there is no core file
stack_start and stack_end define the shared library data. */
else if (memaddr >= stack_start && memaddr < stack_end)
{
if (corechan < 0) {
struct shared_library *lib;
for (lib = shlib; lib; lib = lib->shares)
if (memaddr >= lib->header.a_exec.a_sldatabase &&
memaddr < lib->header.a_exec.a_sldatabase +
lib->header.a_exec.a_data)
break;
if (lib) {
i = min (len, lib->header.a_exec.a_sldatabase +
lib->header.a_exec.a_data - memaddr);
fileptr = lib->data_offset + memaddr -
lib->header.a_exec.a_sldatabase;
xferfile = execfile;
xferchan = lib->chan;
}
} else {
i = min (len, stack_end - memaddr);
fileptr = memaddr - stack_start + stack_offset;
xferfile = &corefile;
xferchan = corechan;
}
}
else if (corechan < 0
&& memaddr >= exec_data_start && memaddr < exec_data_end)
{
i = min (len, exec_data_end - memaddr);
fileptr = memaddr - exec_data_start + exec_data_offset;
xferfile = &execfile;
xferchan = execchan;
}
else if (memaddr >= text_start && memaddr < text_end)
{
struct shared_library *lib;
for (lib = shlib; lib; lib = lib->shares)
if (memaddr >= lib->text_start &&
memaddr < lib->text_start + lib->header.a_exec.a_text)
break;
if (lib) {
i = min (len, lib->header.a_exec.a_text +
lib->text_start - memaddr);
fileptr = memaddr - lib->text_start + text_offset;
xferfile = &execfile;
xferchan = lib->chan;
} else {
i = min (len, text_end - memaddr);
fileptr = memaddr - unshared_text_start + text_offset;
xferfile = &execfile;
xferchan = execchan;
}
}
else if (memaddr < text_start)
{
i = min (len, text_start - memaddr);
}
else if (memaddr >= text_end
&& memaddr < (corechan >= 0? data_start : exec_data_start))
{
i = min (len, data_start - memaddr);
}
else if (corechan >= 0
&& memaddr >= data_end && memaddr < stack_start)
{
i = min (len, stack_start - memaddr);
}
else if (corechan < 0 && memaddr >= exec_data_end)
{
i = min (len, - memaddr);
}
else if (memaddr >= stack_end && stack_end != 0)
{
i = min (len, - memaddr);
}
else
{
/* Address did not classify into one of the known ranges.
This shouldn't happen; we catch the endpoints. */
fatal ("Internal: Bad case logic in xfer_core_file.");
}
/* Now we know which file to use.
Set up its pointer and transfer the data. */
if (xferfile)
{
if (*xferfile == 0)
if (xferfile == &execfile)
error ("No program file to examine.");
else
error ("No core dump file or running program to examine.");
val = lseek (xferchan, fileptr, 0);
if (val < 0)
perror_with_name (*xferfile);
val = myread (xferchan, myaddr, i);
if (val < 0)
perror_with_name (*xferfile);
}
/* If this address is for nonexistent memory,
read zeros if reading, or do nothing if writing.
Actually, we never right. */
else
{
memset (myaddr, '\0', i);
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returnval = EIO;
}
memaddr += i;
myaddr += i;
len -= i;
}
return returnval;
}
#endif
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/* APCS (ARM procedure call standard) defines the following prologue:
mov ip, sp
[stmfd sp!, {a1,a2,a3,a4}]
stmfd sp!, {...,fp,ip,lr,pc}
[stfe f7, [sp, #-12]!]
[stfe f6, [sp, #-12]!]
[stfe f5, [sp, #-12]!]
[stfe f4, [sp, #-12]!]
sub fp, ip, #nn // nn == 20 or 4 depending on second ins
*/
CORE_ADDR
skip_prologue(pc)
CORE_ADDR pc;
{
CORE_ADDR skip_pc = pc;
#if 0
union insn_fmt op;
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op.ins = read_memory_integer(skip_pc, 4);
/* look for the "mov ip,sp" */
if (op.generic.type != TYPE_ARITHMETIC ||
op.arith.opcode != OPCODE_MOV ||
op.arith.dest != SPTEMP ||
op.arith.operand2 != SP) return pc;
skip_pc += 4;
/* skip the "stmfd sp!,{a1,a2,a3,a4}" if its there */
op.ins = read_memory_integer(skip_pc, 4);
if (op.generic.type == TYPE_BLOCK_BRANCH &&
op.generic.subtype == SUBTYPE_BLOCK &&
op.block.mask == 0xf &&
op.block.base == SP &&
op.block.is_load == 0 &&
op.block.writeback == 1 &&
op.block.increment == 0 &&
op.block.before == 1) skip_pc += 4;
/* skip the "stmfd sp!,{...,fp,ip,lr,pc} */
op.ins = read_memory_integer(skip_pc, 4);
if (op.generic.type != TYPE_BLOCK_BRANCH ||
op.generic.subtype != SUBTYPE_BLOCK ||
/* the mask should look like 110110xxxxxx0000 */
(op.block.mask & 0xd800) != 0xd800 ||
op.block.base != SP ||
op.block.is_load != 0 ||
op.block.writeback != 1 ||
op.block.increment != 0 ||
op.block.before != 1) return pc;
skip_pc += 4;
/* check for "sub fp,ip,#nn" */
op.ins = read_memory_integer(skip_pc, 4);
if (op.generic.type != TYPE_ARITHMETIC ||
op.arith.opcode != OPCODE_SUB ||
op.arith.dest != FP ||
op.arith.operand1 != SPTEMP) return pc;
#endif
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return skip_pc + 4;
}
void
arm_frame_find_saved_regs (frame_info, saved_regs_addr)
struct frame_info *frame_info;
struct frame_saved_regs *saved_regs_addr;
{
register int regnum;
register int frame;
register int next_addr;
register int return_data_save;
register int saved_register_mask;
memset (saved_regs_addr, '\0', sizeof (*saved_regs_addr));
frame = frame_info->frame;
return_data_save = read_memory_integer (frame, 4) & 0x03fffffc - 12;
saved_register_mask = read_memory_integer (return_data_save, 4);
next_addr = frame - 12;
for (regnum = 4; regnum < 10; regnum++)
if (saved_register_mask & (1 << regnum))
{
next_addr -= 4;
saved_regs_addr->regs[regnum] = next_addr;
}
if (read_memory_integer (return_data_save + 4, 4) == 0xed6d7103)
{
next_addr -= 12;
saved_regs_addr->regs[F0_REGNUM + 7] = next_addr;
}
if (read_memory_integer (return_data_save + 8, 4) == 0xed6d6103)
{
next_addr -= 12;
saved_regs_addr->regs[F0_REGNUM + 6] = next_addr;
}
if (read_memory_integer (return_data_save + 12, 4) == 0xed6d5103)
{
next_addr -= 12;
saved_regs_addr->regs[F0_REGNUM + 5] = next_addr;
}
if (read_memory_integer(return_data_save + 16, 4) == 0xed6d4103)
{
next_addr -= 12;
saved_regs_addr->regs[F0_REGNUM + 4] = next_addr;
}
saved_regs_addr->regs[SP_REGNUM] = next_addr;
saved_regs_addr->regs[PC_REGNUM] = frame - 4;
saved_regs_addr->regs[PS_REGNUM] = frame - 4;
saved_regs_addr->regs[FP_REGNUM] = frame - 12;
}
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static void
print_fpu_flags(flags)
int flags;
{
if (flags & (1 << 0)) fputs("IVO ", stdout);
if (flags & (1 << 1)) fputs("DVZ ", stdout);
if (flags & (1 << 2)) fputs("OFL ", stdout);
if (flags & (1 << 3)) fputs("UFL ", stdout);
if (flags & (1 << 4)) fputs("INX ", stdout);
putchar('\n');
}
void
arm_float_info()
{
register unsigned long status = read_register(FPS_REGNUM);
int type;
type = (status >> 24) & 127;
printf("%s FPU type %d\n",
(status & (1<<31)) ? "Hardware" : "Software",
type);
fputs("mask: ", stdout);
print_fpu_flags(status >> 16);
fputs("flags: ", stdout);
print_fpu_flags(status);
}
void
_initialize_arm_tdep ()
{
* configure.in: Check for working mmap, ansi headers, string.h, strings.h, and memory.h. * configure: Regenerated. * gdb_stat.h: New file, "portable" <sys/stat.h>. * gdb_string.h: New file, "portable" <string.h>. * altos-xdep.c, arm-tdep.c, arm-xdep.c, convex-tdep.c, convex-xdep.c, coredep.c, cxux-nat.c, dbxread.c, exec.c, gould-xdep.c, hppa-tdep.c, i386aix-nat.c, i386b-nat.c, i386mach-nat.c, i386v-nat.c, infptrace.c, m88k-nat.c, main.c, mdebugread.c, objfiles.c, os9kread.c, procfs.c, pyr-xdep.c, rs6000-nat.c, source.c, standalone.c, stuff.c, sun386-nat.c, symfile.c, symm-nat.c, symm-tdep.c, symtab.c, top.c, ultra3-nat.c, ultra3-xdep.c, umax-xdep.c, xcoffread.c: Include "gdb_stat.h" instead of <sys/stat.h>. * alpha-tdep.c, breakpoint.c, buildsym.c, c-typeprint.c, ch-typeprint.c, coffread.c, command.c, core-sol2.c, core-svr4.c, core.c, corelow.c, cp-valprint.c, dbxread.c, dcache.c, demangle.c, dpx2-nat.c, dstread.c, dwarfread.c, elfread.c, environ.c, eval.c, exec.c, f-lang.c, f-typeprint.c, f-valprint.c, findvar.c, fork-child.c, gdbtypes.c, hpread.c, i386-tdep.c, infcmd.c, inflow.c, infptrace.c, infrun.c, irix5-nat.c, language.c, m2-typeprint.c, main.c, mdebugread.c, minsyms.c, mipsread.c, monitor.c, nlmread.c, objfiles.c, os9kread.c, osfsolib.c, parse.c, printcmd.c, procfs.c, regex.c, remote-adapt.c, remote-arc.c, remote-array.c, remote-bug.c, remote-e7000.c, remote-eb.c, remote-es.c, remote-hms.c, remote-mm.c, remote-os9k.c, remote-pa.c, remote-sim.c, remote-st.c, remote-udi.c, remote-utils.c, remote-vx.c, remote-vx29k.c, remote-vx68.c, remote-vx960.c, remote-vxmips.c, remote-vxsparc.c, remote.c, solib.c, somread.c, source.c, stabsread.c, stack.c, symfile.c, symmisc.c, symtab.c, target.c, top.c, typeprint.c, utils.c, valarith.c, valops.c, valprint.c, values.c, xcoffread.c: Include "gdb_string.h" instead of <string.h>. * gdbtk.c: Likewise. * config/xm-sysv4.h, i386/xm-ptx.h, m68k/xm-sun3os4.h, sparc/xm-sun4os4.h (HAVE_MMAP): Removed. * config/xm-lynx.h, config/i386/xm-ptx.h, config/m68k/nm-apollo68b.h, config/m68k/xm-hp300hpux.h, config/mips/xm-irix3.h, config/mips/xm-mips.h, config/mips/xm-news-mips.h, config/mips/xm-riscos.h, config/pa/hppah.h, config/rs6000/xm-rs6000.h, config/sparc/xm-sun4os4.h, config/sparc/xm-sun4sol2.h, config/vax/xm-vaxbsd.h, config/vax/xm-vaxult.h, config/vax/xm-vaxult2.h (MEM_FNS_DECLARED): Removed. * config/mips/xm-irix3.h, config/mips/xm-mips.h, config/pa/xm-hppah.h (memcpy, memset): Removed declarations.
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tm_print_insn = print_insn_little_arm;
}
/* FIXME: Fill in with the 'right thing', see asm
template in arm-convert.s */
void
convert_from_extended (ptr, dbl)
void *ptr;
double *dbl;
{
*dbl = *(double*)ptr;
}
void
convert_to_extended (dbl, ptr)
void *ptr;
double *dbl;
{
*(double*)ptr = *dbl;
}