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| author | Yao Qi <yao.qi@linaro.org> | 2017-01-13 12:27:39 +0000 |
|---|---|---|
| committer | Yao Qi <yao.qi@linaro.org> | 2017-01-13 12:27:39 +0000 |
| commit | 9608051a0eba6303adcadff7d09b70a36067fba3 (patch) | |
| tree | 1f448bd4bb872d5a2187f26af3ac551611ef9791 | |
| parent | f622ea96de49d77646f52501ef00d03132fcb2df (diff) | |
| download | gdb-9608051a0eba6303adcadff7d09b70a36067fba3.zip gdb-9608051a0eba6303adcadff7d09b70a36067fba3.tar.gz gdb-9608051a0eba6303adcadff7d09b70a36067fba3.tar.bz2 | |
Return -1 on memory error in print_insn_m68k
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.
| -rw-r--r-- | opcodes/ChangeLog | 7 | ||||
| -rw-r--r-- | opcodes/m68k-dis.c | 19 |
2 files changed, 19 insertions, 7 deletions
diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog index 0adbdf1..d4f35bd 100644 --- a/opcodes/ChangeLog +++ b/opcodes/ChangeLog @@ -1,5 +1,12 @@ 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. (NEXTBYTE): Replace -3 with PRINT_INSN_ARG_MEMORY_ERROR. diff --git a/opcodes/m68k-dis.c b/opcodes/m68k-dis.c index a14db9a..345c66b 100644 --- a/opcodes/m68k-dis.c +++ b/opcodes/m68k-dis.c @@ -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 |