cba7e83fda
This patch is in preparation for software single stepping support on ARM
it shares some functions and definitions that will be needed.
No regressions, tested on ubuntu 14.04 ARMv7 and x86.
With gdbserver-{native,extended} / { -marm -mthumb }
Not tested: wince/bsd build.
gdb/ChangeLog:
* arch/arm.c (bitcount): Move from arm-tdep.c.
(condition_true): Likewise.
* arch/arm.h (Instruction Definitions): Move form arm-tdep.h.
(condition_true): Move defenition from arm-tdep.h.
(bitcount): Likewise.
* arm-tdep.c (condition_true): Move to arch/arm.c.
(bitcount): Likewise.
* arm-tdep.h (Instruction Definitions): Move to arch/arm.h.
* arm-wince-tdep.c: Include arch/arm.h.
* armnbsd-tdep.c: Likewise.
90 lines
2.4 KiB
C
90 lines
2.4 KiB
C
/* Common target dependent code for GDB on ARM systems.
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Copyright (C) 1988-2015 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 3 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, see <http://www.gnu.org/licenses/>. */
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#include "common-defs.h"
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#include "arm.h"
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/* See arm.h. */
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int
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thumb_insn_size (unsigned short inst1)
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{
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if ((inst1 & 0xe000) == 0xe000 && (inst1 & 0x1800) != 0)
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return 4;
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else
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return 2;
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}
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/* See arm.h. */
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int
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bitcount (unsigned long val)
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{
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int nbits;
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for (nbits = 0; val != 0; nbits++)
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val &= val - 1; /* Delete rightmost 1-bit in val. */
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return nbits;
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}
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/* See arm.h. */
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int
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condition_true (unsigned long cond, unsigned long status_reg)
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{
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if (cond == INST_AL || cond == INST_NV)
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return 1;
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switch (cond)
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{
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case INST_EQ:
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return ((status_reg & FLAG_Z) != 0);
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case INST_NE:
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return ((status_reg & FLAG_Z) == 0);
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case INST_CS:
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return ((status_reg & FLAG_C) != 0);
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case INST_CC:
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return ((status_reg & FLAG_C) == 0);
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case INST_MI:
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return ((status_reg & FLAG_N) != 0);
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case INST_PL:
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return ((status_reg & FLAG_N) == 0);
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case INST_VS:
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return ((status_reg & FLAG_V) != 0);
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case INST_VC:
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return ((status_reg & FLAG_V) == 0);
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case INST_HI:
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return ((status_reg & (FLAG_C | FLAG_Z)) == FLAG_C);
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case INST_LS:
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return ((status_reg & (FLAG_C | FLAG_Z)) != FLAG_C);
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case INST_GE:
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return (((status_reg & FLAG_N) == 0) == ((status_reg & FLAG_V) == 0));
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case INST_LT:
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return (((status_reg & FLAG_N) == 0) != ((status_reg & FLAG_V) == 0));
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case INST_GT:
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return (((status_reg & FLAG_Z) == 0)
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&& (((status_reg & FLAG_N) == 0)
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== ((status_reg & FLAG_V) == 0)));
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case INST_LE:
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return (((status_reg & FLAG_Z) != 0)
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|| (((status_reg & FLAG_N) == 0)
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!= ((status_reg & FLAG_V) == 0)));
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}
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return 1;
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}
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