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unidasm: Don't blow up when TMS34010 disassembler tries to read 32-bit operands

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This commit is contained in:
AJR 2019-01-12 14:56:05 -05:00
parent 830b460819
commit 01e459a711
1 changed files with 25 additions and 2 deletions
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27
src/tools/unidasm.cpp
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@ -841,8 +841,6 @@ unidasm_data_buffer::unidasm_data_buffer(util::disasm_interface *_disasm, const
case 3:
lr8 = [](offs_t pc) -> u8 { abort(); };
lr32 = [](offs_t pc) -> u32 { abort(); };
lr64 = [](offs_t pc) -> u64 { abort(); };
lr16 = [this](offs_t pc) -> u16 {
if(pc < base_pc)
return 0x0000;
@ -851,6 +849,31 @@ unidasm_data_buffer::unidasm_data_buffer(util::disasm_interface *_disasm, const
return 0x0000;
return reinterpret_cast<const u16 *>(&data[delta])[0];
};
switch(entry->endian) {
case le:
lr32 = [this](offs_t pc) -> u32 {
if(pc < base_pc)
return 0x00000000;
offs_t delta = (pc - base_pc) >> 3;
if(delta >= size + 2)
return 0x00000000;
auto p = reinterpret_cast<const u16 *>(&data[delta]);
return p[0] | (u32(p[1]) << 16);
};
break;
case be:
lr32 = [this](offs_t pc) -> u32 {
if(pc < base_pc)
return 0x00000000;
offs_t delta = (pc - base_pc) >> 3;
if(delta >= size + 2)
return 0x00000000;
auto p = reinterpret_cast<const u16 *>(&data[delta]);
return (u32(p[0]) << 16) | p[1];
};
break;
}
lr64 = [](offs_t pc) -> u64 { abort(); };
break;
default: