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m68k: Support for jump visualization in disassembly

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opcodes/
	* m68k-dis.c (m68k_opcode_to_insn_type): Define.
	(match_insn_m68k): Call it to set insn_type.
	(print_insn_arg) [case 'B']: Set branch target address.
	(print_insn_m68k): Set insn_info_valid.
This commit is contained in:
Andreas Schwab 2024-06-13 19:41:13 +02:00
parent 11fe8653a9
commit 3f30f11f6d
1 changed files with 27 additions and 0 deletions
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27
opcodes/m68k-dis.c
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@ -991,6 +991,8 @@ print_insn_arg (const char *d,
else
return PRINT_INSN_ARG_INVALID_OP_TABLE;
info->target = addr + disp;
(*info->print_address_func) (addr + disp, info);
break;
@ -1442,6 +1444,27 @@ print_insn_arg (const char *d,
return p - p0;
}
/* Return the insn type determined from the opcode information. */
static enum dis_insn_type
m68k_opcode_to_insn_type (const struct m68k_opcode *opc)
{
/* All branches have an operand in 'B' format (the 'B' place only comes
with the 'B' format). */
if (strchr (opc->args, 'B') == NULL)
return dis_nonbranch;
/* Most branches are conditional branches, detect the ones that aren't
from the opcode name. */
if (strncmp (opc->name, "bra", 3) == 0)
return dis_branch;
if (strncmp (opc->name, "bsr", 3) == 0)
return dis_jsr;
return dis_condbranch;
}
/* Try to match the current instruction to best and if so, return the
number of bytes consumed from the instruction stream, else zero.
Return -1 on memory error. */
@ -1573,6 +1596,7 @@ match_insn_m68k (bfd_vma memaddr,
p = save_p;
info->fprintf_styled_func = save_printer;
info->print_address_func = save_print_address;
info->insn_type = m68k_opcode_to_insn_type (best);
d = args;
@ -1730,6 +1754,7 @@ print_insn_m68k (bfd_vma memaddr, disassemble_info *info)
bfd_byte *buffer = priv.the_buffer;
info->insn_info_valid = 1;
info->private_data = & priv;
/* Tell objdump to use two bytes per chunk
and six bytes per line for displaying raw data. */
@ -1761,6 +1786,8 @@ print_insn_m68k (bfd_vma memaddr, disassemble_info *info)
info->fprintf_styled_func (info->stream, dis_style_text, " ");
info->fprintf_styled_func (info->stream, dis_style_immediate,
"0x%04x", (buffer[0] << 8) + buffer[1]);
info->insn_type = dis_noninsn;
}
return val ? val : 2;