f46ffb9ebd
* exec.c (ignore): Return 0.
* stack.c (return_command): Fetch lazy value directly, not via
VALUE_CONTENTS, to avoid "value computed is not used".
* inflow.c (new_tty): Move osigttou inside #if.
* remote.c (remote_fetch_registers): If remote reply is short, just
note that fact and keep going (reading extra registers as all bits 0).
(remote_store_registers): Send number of registers that were found
by remote_fetch_registers.
* m68k-tdep.c, config/m68k/tm-m68k.h, config/m68k/tm-*.h: Remove
HAVE_68881. Define CANNOT_STORE_REGISTER if ptrace() can't write
floating registers.
* config/m68k/{tm-m68k-nofp.h,m68k-nofp.mt,tm-m68k-fp.h,m68k-fp.mt}:
Remove, replaced by {tm-m68k-em.h,m68k-em.mt}.
* Makefile.in, configure.in: Change accordingly.
90 lines
3.1 KiB
C
90 lines
3.1 KiB
C
/* Parameters for execution on a Sun, for GDB, the GNU debugger.
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Copyright (C) 1986, 1987, 1989, 1992 Free Software Foundation, Inc.
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This file is part of GDB.
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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
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the Free Software Foundation; either version 2 of the License, or
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(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
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* Let native-versus-cross support code know we are targeting sun3,
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and modify registers to include sun3 fpustate register. */
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#define GDB_TARGET_IS_SUN3 1
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#include "m68k/tm-m68k.h"
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/* Offsets (in target ints) into jmp_buf. Not defined by Sun, but at least
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documented in a comment in <machine/setjmp.h>! */
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#define JB_ELEMENT_SIZE 4
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#define JB_ONSSTACK 0
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#define JB_SIGMASK 1
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#define JB_SP 2
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#define JB_PC 3
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#define JB_PSL 4
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#define JB_D2 5
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#define JB_D3 6
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#define JB_D4 7
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#define JB_D5 8
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#define JB_D6 9
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#define JB_D7 10
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#define JB_A2 11
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#define JB_A3 12
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#define JB_A4 13
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#define JB_A5 14
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#define JB_A6 15
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/* Figure out where the longjmp will land. Slurp the args out of the stack.
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We expect the first arg to be a pointer to the jmp_buf structure from which
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we extract the pc (JB_PC) that we will land at. The pc is copied into ADDR.
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This routine returns true on success */
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#define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR)
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#undef SAVED_PC_AFTER_CALL
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#ifdef __STDC__
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struct frame_info;
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#endif
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extern CORE_ADDR m68k_saved_pc_after_call PARAMS ((struct frame_info *));
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#define SAVED_PC_AFTER_CALL(frame) \
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m68k_saved_pc_after_call(frame)
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/* If sun3 pcc says that a parameter is a short, it's a short. */
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#define BELIEVE_PCC_PROMOTION_TYPE
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/* The code which tries to deal with this bug is never harmful on a sun3. */
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#define SUN_FIXED_LBRAC_BUG (0)
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/* On the sun3 the kernel pushes a sigcontext on the user stack and then
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`calls' _sigtramp in user code. _sigtramp saves the floating point status
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on the stack and calls the signal handler function. The stack does not
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contain enough information to allow a normal backtrace, but sigcontext
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contains the saved user pc/sp. FRAME_CHAIN and friends in tm-m68k.h and
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m68k_find_saved_regs deal with this situation by manufacturing a fake frame
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for _sigtramp.
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SIG_PC_FP_OFFSET is the offset from the signal handler frame to the
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saved pc in sigcontext.
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SIG_SP_FP_OFFSET is the offset from the signal handler frame to the end
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of sigcontext which is identical to the saved sp at SIG_PC_FP_OFFSET - 4.
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Please note that it is impossible to correctly backtrace from a breakpoint
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in _sigtramp as _sigtramp modifies the stack pointer a few times. */
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#undef SIG_PC_FP_OFFSET
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#define SIG_PC_FP_OFFSET 324
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#define SIG_SP_FP_OFFSET 332
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