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PR binutils/10924

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* arm-dis.c (arm_opcodes): Specify %R in cases where using r15
        results in unpredictable behaviour.
        (print_insn_arm): Handle %R.

        * gas/arm/unpredictable.s: New test case - checks the disassembly
        of instructions with unpredictable behaviour.
        * gas/arm/unpredictable.d: New file - expected disassembly.
This commit is contained in:
Nick Clifton 2009-12-14 16:38:23 +00:00
parent 874f57650c
commit ab8e2090b6
5 changed files with 221 additions and 24 deletions
Download patch file Download diff file Expand all files Collapse all files

69
opcodes/arm-dis.c
View file

@ -789,6 +789,7 @@ static const struct opcode32 neon_opcodes[] =
%P print address for pli instruction.
%<bitfield>r print as an ARM register
%<bitfield>R as %<bitfield>r but r15 is UNPREDICTABLE
%<bitfield>d print the bitfield in decimal
%<bitfield>W print the bitfield plus one in decimal
%<bitfield>x print the bitfield in hex
@ -807,11 +808,11 @@ static const struct opcode32 arm_opcodes[] =
/* ARM instructions. */
{ARM_EXT_V1, 0xe1a00000, 0xffffffff, "nop\t\t\t; (mov r0, r0)"},
{ARM_EXT_V4T | ARM_EXT_V5, 0x012FFF10, 0x0ffffff0, "bx%c\t%0-3r"},
{ARM_EXT_V2, 0x00000090, 0x0fe000f0, "mul%20's%c\t%16-19r, %0-3r, %8-11r"},
{ARM_EXT_V2, 0x00200090, 0x0fe000f0, "mla%20's%c\t%16-19r, %0-3r, %8-11r, %12-15r"},
{ARM_EXT_V2S, 0x01000090, 0x0fb00ff0, "swp%22'b%c\t%12-15r, %0-3r, [%16-19r]"},
{ARM_EXT_V3M, 0x00800090, 0x0fa000f0, "%22?sumull%20's%c\t%12-15r, %16-19r, %0-3r, %8-11r"},
{ARM_EXT_V3M, 0x00a00090, 0x0fa000f0, "%22?sumlal%20's%c\t%12-15r, %16-19r, %0-3r, %8-11r"},
{ARM_EXT_V2, 0x00000090, 0x0fe000f0, "mul%20's%c\t%16-19R, %0-3R, %8-11R"},
{ARM_EXT_V2, 0x00200090, 0x0fe000f0, "mla%20's%c\t%16-19R, %0-3R, %8-11R, %12-15R"},
{ARM_EXT_V2S, 0x01000090, 0x0fb00ff0, "swp%22'b%c\t%12-15R, %0-3R, [%16-19R]"},
{ARM_EXT_V3M, 0x00800090, 0x0fa000f0, "%22?sumull%20's%c\t%12-15R, %16-19R, %0-3R, %8-11R"},
{ARM_EXT_V3M, 0x00a00090, 0x0fa000f0, "%22?sumlal%20's%c\t%12-15R, %16-19R, %0-3R, %8-11R"},
/* V7 instructions. */
{ARM_EXT_V7, 0xf450f000, 0xfd70f000, "pli\t%P"},
@ -984,7 +985,7 @@ static const struct opcode32 arm_opcodes[] =
{ARM_EXT_V5, 0xe1200070, 0xfff000f0, "bkpt\t0x%16-19X%12-15X%8-11X%0-3X"},
{ARM_EXT_V5, 0xfa000000, 0xfe000000, "blx\t%B"},
{ARM_EXT_V5, 0x012fff30, 0x0ffffff0, "blx%c\t%0-3r"},
{ARM_EXT_V5, 0x016f0f10, 0x0fff0ff0, "clz%c\t%12-15r, %0-3r"},
{ARM_EXT_V5, 0x016f0f10, 0x0fff0ff0, "clz%c\t%12-15R, %0-3R"},
/* V5E "El Segundo" Instructions. */
{ARM_EXT_V5E, 0x000000d0, 0x0e1000f0, "ldrd%c\t%12-15r, %s"},
@ -1018,18 +1019,23 @@ static const struct opcode32 arm_opcodes[] =
/* ARM Instructions. */
{ARM_EXT_V1, 0x052d0004, 0x0fff0fff, "push%c\t{%12-15r}\t\t; (str%c %12-15r, %a)"},
{ARM_EXT_V1, 0x04000000, 0x0e100000, "str%22'b%t%c\t%12-15r, %a"},
{ARM_EXT_V1, 0x06000000, 0x0e100ff0, "str%22'b%t%c\t%12-15r, %a"},
{ARM_EXT_V1, 0x04000000, 0x0c100010, "str%22'b%t%c\t%12-15r, %a"},
{ARM_EXT_V1, 0x04400000, 0x0e500000, "strb%c\t%12-15r, %a"},
{ARM_EXT_V1, 0x06400000, 0x0e500010, "strb%c\t%12-15r, %a"},
{ARM_EXT_V1, 0x004000b0, 0x0e5000f0, "strh%c\t%12-15r, %s"},
{ARM_EXT_V1, 0x000000b0, 0x0e500ff0, "strh%c\t%12-15r, %s"},
{ARM_EXT_V1, 0x04400000, 0x0e500000, "strb%t%c\t%12-15R, %a"},
{ARM_EXT_V1, 0x04000000, 0x0e500000, "str%t%c\t%12-15r, %a"},
{ARM_EXT_V1, 0x06400000, 0x0e500ff0, "strb%t%c\t%12-15R, %a"},
{ARM_EXT_V1, 0x06000000, 0x0e500ff0, "str%t%c\t%12-15r, %a"},
{ARM_EXT_V1, 0x04400000, 0x0c500010, "strb%t%c\t%12-15R, %a"},
{ARM_EXT_V1, 0x04000000, 0x0c500010, "str%t%c\t%12-15r, %a"},
{ARM_EXT_V1, 0x04400000, 0x0e500000, "strb%c\t%12-15R, %a"},
{ARM_EXT_V1, 0x06400000, 0x0e500010, "strb%c\t%12-15R, %a"},
{ARM_EXT_V1, 0x004000b0, 0x0e5000f0, "strh%c\t%12-15R, %s"},
{ARM_EXT_V1, 0x000000b0, 0x0e500ff0, "strh%c\t%12-15R, %s"},
{ARM_EXT_V1, 0x00500090, 0x0e5000f0, UNDEFINED_INSTRUCTION},
{ARM_EXT_V1, 0x00500090, 0x0e500090, "ldr%6's%5?hb%c\t%12-15r, %s"},
{ARM_EXT_V1, 0x00500090, 0x0e500090, "ldr%6's%5?hb%c\t%12-15R, %s"},
{ARM_EXT_V1, 0x00100090, 0x0e500ff0, UNDEFINED_INSTRUCTION},
{ARM_EXT_V1, 0x00100090, 0x0e500f90, "ldr%6's%5?hb%c\t%12-15r, %s"},
{ARM_EXT_V1, 0x00100090, 0x0e500f90, "ldr%6's%5?hb%c\t%12-15R, %s"},
{ARM_EXT_V1, 0x02000000, 0x0fe00000, "and%20's%c\t%12-15r, %16-19r, %o"},
{ARM_EXT_V1, 0x00000000, 0x0fe00010, "and%20's%c\t%12-15r, %16-19r, %o"},
@ -1064,7 +1070,7 @@ static const struct opcode32 arm_opcodes[] =
{ARM_EXT_V1, 0x00e00010, 0x0fe00090, "rsc%20's%c\t%12-15r, %16-19r, %o"},
{ARM_EXT_V3, 0x0120f000, 0x0db0f000, "msr%c\t%22?SCPSR%C, %o"},
{ARM_EXT_V3, 0x010f0000, 0x0fbf0fff, "mrs%c\t%12-15r, %22?SCPSR"},
{ARM_EXT_V3, 0x010f0000, 0x0fbf0fff, "mrs%c\t%12-15R, %22?SCPSR"},
{ARM_EXT_V1, 0x03000000, 0x0fe00000, "tst%p%c\t%16-19r, %o"},
{ARM_EXT_V1, 0x01000000, 0x0fe00010, "tst%p%c\t%16-19r, %o"},
@ -1105,13 +1111,18 @@ static const struct opcode32 arm_opcodes[] =
{ARM_EXT_V1, 0x06000010, 0x0e000010, UNDEFINED_INSTRUCTION},
{ARM_EXT_V1, 0x049d0004, 0x0fff0fff, "pop%c\t{%12-15r}\t\t; (ldr%c %12-15r, %a)"},
{ARM_EXT_V1, 0x04100000, 0x0c100000, "ldr%22'b%t%c\t%12-15r, %a"},
{ARM_EXT_V1, 0x04500000, 0x0c500000, "ldrb%t%c\t%12-15R, %a"},
{ARM_EXT_V1, 0x04300000, 0x0d700000, "ldrt%c\t%12-15R, %a"},
{ARM_EXT_V1, 0x04100000, 0x0c500000, "ldr%c\t%12-15r, %a"},
{ARM_EXT_V1, 0x092d0000, 0x0fff0000, "push%c\t%m"},
{ARM_EXT_V1, 0x08800000, 0x0ff00000, "stm%c\t%16-19r%21'!, %m%22'^"},
{ARM_EXT_V1, 0x08000000, 0x0e100000, "stm%23?id%24?ba%c\t%16-19r%21'!, %m%22'^"},
{ARM_EXT_V1, 0x08800000, 0x0ff00000, "stm%c\t%16-19R%21'!, %m%22'^"},
{ARM_EXT_V1, 0x08000000, 0x0e100000, "stm%23?id%24?ba%c\t%16-19R%21'!, %m%22'^"},
{ARM_EXT_V1, 0x08bd0000, 0x0fff0000, "pop%c\t%m"},
{ARM_EXT_V1, 0x08900000, 0x0f900000, "ldm%c\t%16-19r%21'!, %m%22'^"},
{ARM_EXT_V1, 0x08100000, 0x0e100000, "ldm%23?id%24?ba%c\t%16-19r%21'!, %m%22'^"},
{ARM_EXT_V1, 0x08900000, 0x0f900000, "ldm%c\t%16-19R%21'!, %m%22'^"},
{ARM_EXT_V1, 0x08100000, 0x0e100000, "ldm%23?id%24?ba%c\t%16-19R%21'!, %m%22'^"},
{ARM_EXT_V1, 0x0a000000, 0x0e000000, "b%24'l%c\t%b"},
{ARM_EXT_V1, 0x0f000000, 0x0f000000, "svc%c\t%0-23x"},
@ -2831,6 +2842,7 @@ print_insn_arm (bfd_vma pc, struct disassemble_info *info, long given)
|| (insn->mask & 0xF0000000) == 0xF0000000
|| (insn->mask == 0 && insn->value == 0))
{
bfd_boolean is_unpredictable = FALSE;
signed long value_in_comment = 0;
const char *c;
@ -2878,7 +2890,7 @@ print_insn_arm (bfd_vma pc, struct disassemble_info *info, long given)
else
{
func (stream, "[pc], #%d", offset);
func (stream, UNPREDICTABLE_INSTRUCTION);
is_unpredictable = TRUE;
}
}
else
@ -2937,8 +2949,8 @@ print_insn_arm (bfd_vma pc, struct disassemble_info *info, long given)
if (WRITEBACK_BIT_SET
/* Specifying the PC register as the post-indexed
registers is also unpredictable. */
|| ((given & 0xf) == 0xf))
func (stream, UNPREDICTABLE_INSTRUCTION);
|| (! IMMEDIATE_BIT_SET && ((given & 0xf) == 0xf)))
is_unpredictable = TRUE;
}
}
}
@ -2972,6 +2984,8 @@ print_insn_arm (bfd_vma pc, struct disassemble_info *info, long given)
func (stream, "%s", arm_regnames[reg]);
}
func (stream, "}");
if (! started)
is_unpredictable = TRUE;
}
break;
@ -3105,6 +3119,10 @@ print_insn_arm (bfd_vma pc, struct disassemble_info *info, long given)
switch (*c)
{
case 'R':
if (value == 15)
is_unpredictable = TRUE;
/* Fall through. */
case 'r':
func (stream, "%s", arm_regnames[value]);
break;
@ -3202,6 +3220,9 @@ print_insn_arm (bfd_vma pc, struct disassemble_info *info, long given)
if (value_in_comment > 32 || value_in_comment < -16)
func (stream, "\t; 0x%lx", (value_in_comment & 0xffffffffUL));
if (is_unpredictable)
func (stream, UNPREDICTABLE_INSTRUCTION);
return;
}
}