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Return -1 on memory error in print_insn_m68k

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m68k-dis.c:print_insn_m68k doesn't return -1 on memory error, but GDB
expects it returning -1 on memory error.

opcodes:

2017-01-13  Yao Qi  <yao.qi@linaro.org>

	* m68k-dis.c (match_insn_m68k): Extend comments.  Return -1
	if FETCH_DATA returns 0.
	(m68k_scan_mask): Likewise.
	(print_insn_m68k): Update code to handle -1 return value.
This commit is contained in:
Yao Qi 2017-01-13 12:27:39 +00:00
parent f622ea96de
commit 9608051a0e
2 changed files with 19 additions and 7 deletions
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7
opcodes/ChangeLog
View File

@ -1,3 +1,10 @@
2017-01-13 Yao Qi <yao.qi@linaro.org>
* m68k-dis.c (match_insn_m68k): Extend comments. Return -1
if FETCH_DATA returns 0.
(m68k_scan_mask): Likewise.
(print_insn_m68k): Update code to handle -1 return value.
2017-01-13 Yao Qi <yao.qi@linaro.org>
* m68k-dis.c (enum print_insn_arg_error): New.

19
opcodes/m68k-dis.c
View File

@ -1331,7 +1331,8 @@ print_insn_arg (const char *d,
}
/* Try to match the current instruction to best and if so, return the
number of bytes consumed from the instruction stream, else zero. */
number of bytes consumed from the instruction stream, else zero.
Return -1 on memory error. */
static int
match_insn_m68k (bfd_vma memaddr,
@ -1415,12 +1416,14 @@ match_insn_m68k (bfd_vma memaddr,
this because we know exactly what the second word is, and we
aren't going to print anything based on it. */
p = buffer + 6;
FETCH_DATA (info, p);
if (!FETCH_DATA (info, p))
return -1;
buffer[2] = buffer[4];
buffer[3] = buffer[5];
}
FETCH_DATA (info, p);
if (!FETCH_DATA (info, p))
return -1;
save_p = p;
info->print_address_func = dummy_print_address;
@ -1439,7 +1442,7 @@ match_insn_m68k (bfd_vma memaddr,
{
info->fprintf_func = save_printer;
info->print_address_func = save_print_address;
return 0;
return eaten == PRINT_INSN_ARG_MEMORY_ERROR ? -1 : 0;
}
else
{
@ -1481,7 +1484,8 @@ match_insn_m68k (bfd_vma memaddr,
/* Try to interpret the instruction at address MEMADDR as one that
can execute on a processor with the features given by ARCH_MASK.
If successful, print the instruction to INFO->STREAM and return
its length in bytes. Return 0 otherwise. */
its length in bytes. Return 0 otherwise. Return -1 on memory
error. */
static int
m68k_scan_mask (bfd_vma memaddr, disassemble_info *info,
@ -1523,7 +1527,8 @@ m68k_scan_mask (bfd_vma memaddr, disassemble_info *info,
*opc_pointer[(m68k_opcodes[i].opcode >> 28) & 15]++ = &m68k_opcodes[i];
}
FETCH_DATA (info, buffer + 2);
if (!FETCH_DATA (info, buffer + 2))
return -1;
major_opcode = (buffer[0] >> 4) & 15;
for (i = 0; i < numopcodes[major_opcode]; i++)
@ -1628,7 +1633,7 @@ print_insn_m68k (bfd_vma memaddr, disassemble_info *info)
/* First try printing an m680x0 instruction. Try printing a Coldfire
one if that fails. */
val = m68k_scan_mask (memaddr, info, m68k_mask);
if (val == 0)
if (val <= 0)
val = m68k_scan_mask (memaddr, info, mcf_mask);
}
else