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This patch adds host, target and native support for m68k-linux. I hope
that this will finally be installed, more than two(!) years after i have
contributed it the first time. All necessary assignments are already
present, since July 1996.
1998-12-01 Andreas Schwab <schwab@issan.cs.uni-dortmund.de>
* Makefile.in, configure.host, configure.tgt: Add support for
m68k-linux.
* config/m68k/linux.mh: New file.
* config/m68k/linux.mt: New file.
* config/m68k/nm-linux.h: New file.
* config/m68k/tm-linux.h: New file.
* config/m68k/xm-linux.h: New file.
* gdb/m68klinux-nat.c: New file.
* gdbserver/low-linux.c: Add support for m68k-linux.
* gdb/config/m68k/tm-m68k.h (NUM_FREGS): New macro.
--- gdb-981121/gdb/Makefile.in.~1~ Mon Nov 23 23:47:55 1998
+++ gdb-981121/gdb/Makefile.in Tue Nov 24 00:26:20 1998
@@ -1164,6 +1164,9 @@
$(gdbcore_h) gdb_string.h
m68kly-nat.o: m68kly-nat.c $(defs_h) $(frame_h) $(inferior_h) target.h
+
+m68klinux-nat.o: m68klinux-nat.c $(defs_h) $(frame_h) $(inferior_h) \
+ $(language_h) $(gdbcore_h) $(floatformat_h) target.h
m88k-nat.o: m88k-nat.c $(defs_h) $(gdbcore_h) $(inferior_h)
--- /dev/null Sun Oct 25 16:43:08 1998
+++ gdb-981121/gdb/config/m68k/linux.mh Tue Apr 30 00:25:38 1996
@@ -0,0 +1,9 @@
+# Host: Motorola m68k running Linux
+
+XM_FILE= xm-linux.h
+XDEPFILES= ser-tcp.o
+
+NAT_FILE= nm-linux.h
+NATDEPFILES= infptrace.o solib.o inftarg.o fork-child.o corelow.o core-aout.o core-regset.o m68klinux-nat.o
+
+GDBSERVER_DEPFILES= low-linux.o
--- /dev/null Sun Oct 25 16:43:08 1998
+++ gdb-981121/gdb/config/m68k/linux.mt Mon Apr 29 23:00:57 1996
@@ -0,0 +1,3 @@
+# Target: Motorola m68k with a.out and ELF
+TDEPFILES= m68k-tdep.o
+TM_FILE= tm-linux.h
--- /dev/null Sun Oct 25 16:43:08 1998
+++ gdb-981121/gdb/config/m68k/nm-linux.h Sun May 3 13:09:41 1998
@@ -0,0 +1,47 @@
+/* Native support for linux, for GDB, the GNU debugger.
+ Copyright (C) 1996,1998 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 NM_LINUX_H
+#define NM_LINUX_H
+
+/* Return sizeof user struct to callers in less machine dependent routines */
+
+#define KERNEL_U_SIZE kernel_u_size()
+extern int kernel_u_size PARAMS ((void));
+
+/* Tell gdb that we can attach and detach other processes */
+#define ATTACH_DETACH
+
+#define U_REGS_OFFSET 0
+
+/* We define this if link.h is available, because with ELF we use SVR4 style
+ shared libraries. */
+
+#ifdef HAVE_LINK_H
+#define SVR4_SHARED_LIBS
+#include "solib.h" /* Support for shared libraries. */
+#endif
+
+#define REGISTER_U_ADDR(addr, blockend, regno) \
+ (addr) = m68k_linux_register_u_addr ((blockend),(regno));
+
+extern int
+m68k_linux_register_u_addr PARAMS ((int, int));
+
+#endif /* #ifndef NM_LINUX_H */
--- /dev/null Sun Oct 25 16:43:08 1998
+++ gdb-981121/gdb/config/m68k/tm-linux.h Sun May 3 13:10:15 1998
@@ -0,0 +1,109 @@
+/* Definitions to target GDB to Linux on m680x0
+ Copyright (C) 1996,1998 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. */
+
+/* Number of traps that happen between exec'ing the shell to run an
+ inferior, and when we finally get to the inferior code. This is 2
+ on most implementations. */
+
+#define START_INFERIOR_TRAPS_EXPECTED 2
+
+/* The following definitions are appropriate when using the ELF
+ format, where floating point values are returned in fp0, pointer
+ values in a0 and other values in d0. */
+
+/* Extract from an array REGBUF containing the (raw) register state a
+ function return value of type TYPE, and copy that, in virtual
+ format, into VALBUF. */
+
+#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
+{ \
+ if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
+ { \
+ REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, TYPE, \
+ ((char *) (REGBUF) \
+ + REGISTER_BYTE (FP0_REGNUM)), \
+ VALBUF); \
+ } \
+ else if (TYPE_CODE (TYPE) == TYPE_CODE_PTR) \
+ memcpy (VALBUF, (char *) (REGBUF) + REGISTER_BYTE (A0_REGNUM), \
+ TYPE_LENGTH (TYPE)); \
+ else \
+ memcpy (VALBUF, \
+ ((char *) (REGBUF) \
+ + (TYPE_LENGTH (TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH (TYPE))), \
+ TYPE_LENGTH (TYPE)); \
+}
+
+/* Write into appropriate registers a function return value of type
+ TYPE, given in virtual format. */
+
+#define STORE_RETURN_VALUE(TYPE,VALBUF) \
+{ \
+ if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
+ { \
+ char raw_buffer[REGISTER_RAW_SIZE (FP0_REGNUM)]; \
+ REGISTER_CONVERT_TO_RAW (TYPE, FP0_REGNUM, VALBUF, raw_buffer); \
+ write_register_bytes (REGISTER_BYTE (FP0_REGNUM), \
+ raw_buffer, TYPE_LENGTH (TYPE)); \
+ } \
+ else \
+ { \
+ if (TYPE_CODE (TYPE) == TYPE_CODE_PTR) \
+ write_register_bytes (REGISTER_BYTE (A0_REGNUM), VALBUF, \
+ TYPE_LENGTH (TYPE)); \
+ write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)); \
+ } \
+}
+
+#include "tm-sysv4.h"
+#include "m68k/tm-m68k.h"
+
+/* Extract from an array REGBUF containing the (raw) register state
+ the address in which a function should return its structure value,
+ as a CORE_ADDR (or an expression that can be used as one). */
+
+#undef EXTRACT_STRUCT_VALUE_ADDRESS
+#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
+ (*(CORE_ADDR *)((char *) (REGBUF) + REGISTER_BYTE (A0_REGNUM)))
+
+/* Offsets (in target ints) into jmp_buf. */
+
+#define JB_ELEMENT_SIZE 4
+#define JB_PC 7
+
+/* Figure out where the longjmp will land. Slurp the args out of the stack.
+ We expect the first arg to be a pointer to the jmp_buf structure from which
+ we extract the pc (JB_PC) that we will land at. The pc is copied into ADDR.
+ This routine returns true on success */
+
+#define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR)
+
+/* Offset to saved PC in sigcontext, from <asm/sigcontext.h>. */
+#define SIGCONTEXT_PC_OFFSET 26
+
+#undef FRAME_SAVED_PC
+#define FRAME_SAVED_PC(FRAME) \
+ (((FRAME)->signal_handler_caller \
+ ? sigtramp_saved_pc (FRAME) \
+ : read_memory_integer ((FRAME)->frame + 4, 4)))
+
+extern CORE_ADDR sigtramp_saved_pc PARAMS ((struct frame_info *));
+
+#define IN_SIGTRAMP(pc,name) in_sigtramp (pc)
+extern int in_sigtramp PARAMS ((CORE_ADDR pc));
--- gdb-981121/gdb/config/m68k/tm-m68k.h.~1~ Wed Apr 29 18:23:33 1998
+++ gdb-981121/gdb/config/m68k/tm-m68k.h Wed Apr 29 20:11:34 1998
@@ -110,6 +110,8 @@
#define NUM_REGS 29
#endif
+#define NUM_FREGS (NUM_REGS-24)
+
#ifndef REGISTER_BYTES_OK
#define REGISTER_BYTES_OK(b) \
((b) == REGISTER_BYTES_FP \
--- /dev/null Sun Oct 25 16:43:08 1998
+++ gdb-981121/gdb/config/m68k/xm-linux.h Sun May 3 13:10:38 1998
@@ -0,0 +1,40 @@
+/* Native support for linux, for GDB, the GNU debugger.
+ Copyright (C) 1996,1998 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 XM_LINUX_H
+#define XM_LINUX_H
+
+/* Pick up most of what we need from the generic m68k host include file. */
+
+#include "m68k/xm-m68k.h"
+
+/* This is the amount to subtract from u.u_ar0
+ to get the offset in the core file of the register values. */
+#define KERNEL_U_ADDR 0x0
+
+#define HAVE_TERMIOS
+#define NEED_POSIX_SETPGID
+
+/* Linux has sigsetjmp and siglongjmp */
+#define HAVE_SIGSETJMP
+
+/* Need R_OK etc, but USG isn't defined. */
+#include <unistd.h>
+
+#endif /* #ifndef XM_LINUX_H */
--- gdb-981121/gdb/configure.host.~1~ Mon Nov 23 23:48:17 1998
+++ gdb-981121/gdb/configure.host Tue Nov 24 00:27:15 1998
@@ -86,6 +86,7 @@
m68*-hp-bsd*) gdb_host=hp300bsd ;;
m68*-hp-hpux*) gdb_host=hp300hpux ;;
m68*-isi-*) gdb_host=isi ;;
+m68*-*-linux*) gdb_host=linux ;;
m68*-*-lynxos*) gdb_host=m68klynx ;;
m68*-*-netbsd*) gdb_host=nbsd ;;
m68*-*-sysv4*) gdb_host=m68kv4 ;;
--- gdb-981121/gdb/configure.tgt.~1~ Mon Nov 23 23:48:18 1998
+++ gdb-981121/gdb/configure.tgt Tue Nov 24 00:28:13 1998
@@ -147,6 +147,8 @@
m68*-*-aout*) gdb_target=monitor ;;
m68*-*-coff*) gdb_target=monitor ;;
m68*-*-elf*) gdb_target=monitor ;;
+m68*-*-linux*) gdb_target=linux
+ configdirs="${configdirs} gdbserver" ;;
m68*-*-lynxos*) gdb_target=m68klynx
configdirs="${configdirs} gdbserver" ;;
m68*-*-netbsd*) gdb_target=nbsd ;;
--- gdb-981121/gdb/gdbserver/low-linux.c.~1~ Wed Apr 29 18:25:31 1998
+++ gdb-981121/gdb/gdbserver/low-linux.c Tue Dec 1 11:03:57 1998
@@ -45,8 +45,8 @@
/***************End MY defs*********************/
#include <sys/ptrace.h>
-#if 0
-#include <machine/reg.h>
+#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1)
+#include <sys/reg.h>
#endif
extern char **environ;
@@ -165,6 +165,7 @@
- KERNEL_U_ADDR
#endif
+#ifndef TARGET_M68K
/* this table must line up with REGISTER_NAMES in tm-i386v.h */
/* symbols like 'EAX' come from <sys/reg.h> */
static int regmap[] =
@@ -198,6 +199,37 @@
return (blockend + 4 * regmap[regnum]);
}
+#else /* TARGET_M68K */
+/* This table must line up with REGISTER_NAMES in tm-m68k.h */
+static int regmap[] =
+{
+#ifdef PT_D0
+ PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7,
+ PT_A0, PT_A1, PT_A2, PT_A3, PT_A4, PT_A5, PT_A6, PT_USP,
+ PT_SR, PT_PC,
+#else
+ 14, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15,
+ 17, 18,
+#endif
+#ifdef PT_FP0
+ PT_FP0, PT_FP1, PT_FP2, PT_FP3, PT_FP4, PT_FP5, PT_FP6, PT_FP7,
+ PT_FPCR, PT_FPSR, PT_FPIAR
+#else
+ 21, 24, 27, 30, 33, 36, 39, 42, 45, 46, 47
+#endif
+};
+
+/* BLOCKEND is the value of u.u_ar0, and points to the place where GS
+ is stored. */
+
+int
+m68k_linux_register_u_addr (blockend, regnum)
+ int blockend;
+ int regnum;
+{
+ return (blockend + 4 * regmap[regnum]);
+}
+#endif
CORE_ADDR
register_addr (regno, blockend)
--- /dev/null Sun Oct 25 16:43:08 1998
+++ gdb-981121/gdb/m68klinux-nat.c Sun May 3 13:30:58 1998
@@ -0,0 +1,141 @@
+/* Motorola m68k native support for Linux
+ Copyright (C) 1996,1998 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 "inferior.h"
+#include "language.h"
+#include "gdbcore.h"
+
+#ifdef USG
+#include <sys/types.h>
+#endif
+
+#include <sys/param.h>
+#include <sys/dir.h>
+#include <signal.h>
+#include <sys/user.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <sys/procfs.h>
+
+#include <sys/file.h>
+#include "gdb_stat.h"
+
+#include "floatformat.h"
+
+#include "target.h"
+
+
+/* This table must line up with REGISTER_NAMES in tm-m68k.h */
+static const int regmap[] =
+{
+ PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7,
+ PT_A0, PT_A1, PT_A2, PT_A3, PT_A4, PT_A5, PT_A6, PT_USP,
+ PT_SR, PT_PC,
+ /* PT_FP0, ..., PT_FP7 */
+ 21, 24, 27, 30, 33, 36, 39, 42,
+ /* PT_FPCR, PT_FPSR, PT_FPIAR */
+ 45, 46, 47
+};
+
+/* BLOCKEND is the value of u.u_ar0, and points to the place where GS
+ is stored. */
+
+int
+m68k_linux_register_u_addr (blockend, regnum)
+ int blockend;
+ int regnum;
+{
+ return (blockend + 4 * regmap[regnum]);
+}
+
+/* Given a pointer to a general register set in /proc format (gregset_t *),
+ unpack the register contents and supply them as gdb's idea of the current
+ register values. */
+
+void
+supply_gregset (gregsetp)
+ gregset_t *gregsetp;
+{
+ int regi;
+
+ for (regi = D0_REGNUM ; regi <= SP_REGNUM ; regi++)
+ supply_register (regi, (char *) (*gregsetp + regmap[regi]));
+ supply_register (PS_REGNUM, (char *) (*gregsetp + PT_SR));
+ supply_register (PC_REGNUM, (char *) (*gregsetp + PT_PC));
+}
+
+/* Given a pointer to a floating point register set in /proc format
+ (fpregset_t *), unpack the register contents and supply them as gdb's
+ idea of the current floating point register values. */
+
+void
+supply_fpregset (fpregsetp)
+ fpregset_t *fpregsetp;
+{
+ int regi;
+
+ for (regi = FP0_REGNUM ; regi < FPC_REGNUM ; regi++)
+ supply_register (regi, (char *) &fpregsetp->fpregs[(regi - FP0_REGNUM) * 3]);
+ supply_register (FPC_REGNUM, (char *) &fpregsetp->fpcntl[0]);
+ supply_register (FPS_REGNUM, (char *) &fpregsetp->fpcntl[1]);
+ supply_register (FPI_REGNUM, (char *) &fpregsetp->fpcntl[2]);
+}
+
+int
+kernel_u_size ()
+{
+ return (sizeof (struct user));
+}
+
+/* Return non-zero if PC points into the signal trampoline. */
+
+int
+in_sigtramp (pc)
+ CORE_ADDR pc;
+{
+ CORE_ADDR sp;
+ char buf[TARGET_SHORT_BIT / TARGET_CHAR_BIT];
+ int insn;
+
+ sp = read_register (SP_REGNUM);
+ if (pc - 2 < sp)
+ return 0;
+
+ if (read_memory_nobpt (pc, buf, sizeof (buf)))
+ return 0;
+ insn = extract_unsigned_integer (buf, sizeof (buf));
+ if (insn == 0xdefc /* addaw #,sp */
+ || insn == 0x7077 /* moveq #119,d0 */
+ || insn == 0x4e40 /* trap #0 */
+ || insn == 0x203c /* movel #,d0 */)
+ return 1;
+
+ if (read_memory_nobpt (pc - 2, buf, sizeof (buf)))
+ return 0;
+ insn = extract_unsigned_integer (buf, sizeof (buf));
+ if (insn == 0xdefc /* addaw #,sp */
+ || insn == 0x7077 /* moveq #119,d0 */
+ || insn == 0x4e40 /* trap #0 */
+ || insn == 0x203c /* movel #,d0 */)
+ return 1;
+
+ return 0;
+}
--
Andreas Schwab "And now for something
schwab@issan.cs.uni-dortmund.de completely different"
schwab@gnu.org