Initial creation of sourceware repositorygdb-4_18-branchpoint

1 files changed, 107 insertions, 0 deletions

diff --git a/gdb/config/m68k/tm-sun3.h b/gdb/config/m68k/tm-sun3.h
new file mode 100644
index 0000000..be45db4
--- /dev/null
+++ b/gdb/config/m68k/tm-sun3.h
@@ -0,0 +1,107 @@
+/* Parameters for execution on a Sun, for GDB, the GNU debugger.
+   Copyright (C) 1986, 1987, 1989, 1992 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 TM_SUN3_H
+#define TM_SUN3_H
+
+/* Sun3 status includes fpflags, which shows whether the FPU has been used
+   by the process, and whether the FPU was done with an instruction or 
+   was interrupted in the middle of a long instruction.  See
+   <machine/reg.h>.  */
+/*                      a&d, pc,sr, fp, fpstat, fpflags   */
+
+#define REGISTER_BYTES (16*4 + 8 + 8*12 + 3*4 + 4)
+
+#define NUM_REGS 31
+
+#define REGISTER_BYTES_OK(b) \
+     ((b) == REGISTER_BYTES \
+      || (b) == REGISTER_BYTES_FP \
+      || (b) == REGISTER_BYTES_NOFP)
+
+/* If PC contains this instruction, then we know what we are in a system
+   call stub, and the return PC is is at SP+4, instead of SP. */
+
+#define SYSCALL_TRAP 0x4e40	/* trap #0 */
+#define SYSCALL_TRAP_OFFSET 0	/* PC points at trap instruction */
+
+#include "m68k/tm-m68k.h"
+
+/* Disable alternate breakpoint mechanism needed by 68k stub. */
+#undef REMOTE_BREAKPOINT
+
+/* Offsets (in target ints) into jmp_buf.  Not defined by Sun, but at least
+   documented in a comment in <machine/setjmp.h>! */
+
+#define JB_ELEMENT_SIZE 4
+
+#define JB_ONSSTACK 0
+#define JB_SIGMASK 1
+#define JB_SP 2
+#define JB_PC 3
+#define JB_PSL 4
+#define JB_D2 5
+#define JB_D3 6
+#define JB_D4 7
+#define JB_D5 8
+#define JB_D6 9
+#define JB_D7 10
+#define JB_A2 11
+#define JB_A3 12
+#define JB_A4 13
+#define JB_A5 14
+#define JB_A6 15
+
+/* 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)
+extern int get_longjmp_target PARAMS ((CORE_ADDR *));
+
+/* If sun3 pcc says that a parameter is a short, it's a short.  */
+#define BELIEVE_PCC_PROMOTION_TYPE
+
+/* Can't define BELIEVE_PCC_PROMOTION for SunOS /bin/cc of SunOS 4.1.1.
+   Apparently Sun fixed this for the sparc but not the sun3.  */
+
+/* The code which tries to deal with this bug is never harmful on a sun3.  */
+#define SUN_FIXED_LBRAC_BUG (0)
+
+/* On the sun3 the kernel pushes a sigcontext on the user stack and then
+   `calls' _sigtramp in user code. _sigtramp saves the floating point status
+   on the stack and calls the signal handler function. The stack does not
+   contain enough information to allow a normal backtrace, but sigcontext
+   contains the saved user pc/sp. FRAME_CHAIN and friends in tm-m68k.h and
+   m68k_find_saved_regs deal with this situation by manufacturing a fake frame
+   for _sigtramp.
+   SIG_PC_FP_OFFSET is the offset from the signal handler frame to the
+   saved pc in sigcontext.
+   SIG_SP_FP_OFFSET is the offset from the signal handler frame to the end
+   of sigcontext which is identical to the saved sp at SIG_PC_FP_OFFSET - 4.
+
+   Please note that it is impossible to correctly backtrace from a breakpoint
+   in _sigtramp as _sigtramp modifies the stack pointer a few times.  */
+
+#undef SIG_PC_FP_OFFSET
+#define SIG_PC_FP_OFFSET 324
+#define SIG_SP_FP_OFFSET 332
+
+#endif /* TM_SUN3_H */