diff options
Diffstat (limited to 'run/dos_emu.cpp')
| -rw-r--r-- | run/dos_emu.cpp | 43 |
1 files changed, 39 insertions, 4 deletions
diff --git a/run/dos_emu.cpp b/run/dos_emu.cpp index f8e294d..c42df68 100644 --- a/run/dos_emu.cpp +++ b/run/dos_emu.cpp @@ -9,7 +9,7 @@ #include <ucontext.h> static void dos_functions(mcontext_t& mcontext); -static void dpmi_functions(mcontext_t& mcontext); +static void dpmi_functions(mcontext_t& mcontext, long unsigned int& flags); void dos_emu_handler(int, siginfo_t*, void* c) { ucontext_t* context = (ucontext_t*) c; @@ -27,7 +27,7 @@ void dos_emu_handler(int, siginfo_t*, void* c) { dos_functions(context->uc_mcontext); } if(instruction[1] == 0x31) { - dpmi_functions(context->uc_mcontext); + dpmi_functions(context->uc_mcontext, context->uc_flags); } //skip the interrupt and hopefully we handled it owk. @@ -40,10 +40,45 @@ void dos_emu_handler(int, siginfo_t*, void* c) { return; } -static void dos_functions(mcontext_t&) { +static void dos_functions(mcontext_t& mcontext) { + uint8_t ah = (mcontext.gregs[REG_EAX] & 0x0000FF00) >> 8; + uint8_t al = mcontext.gregs[REG_EAX] & 0x000000FF; + uint16_t ax = mcontext.gregs[REG_EAX] & 0x0000FFFF; + uint16_t dx = mcontext.gregs[REG_EDX] & 0x0000FFFF; + + //Get dos version + if(ah == 0x30) { + mcontext.gregs[REG_EAX] &= 0xFFFF0000; + mcontext.gregs[REG_EAX] |= 6 << 8; + mcontext.gregs[REG_EAX] |= 22; + + mcontext.gregs[REG_EBX] &= 0xFFFF0000; + mcontext.gregs[REG_EBX] |= 0x000000DE; + mcontext.gregs[REG_ECX] = 0xDEADBEAF; + + if(al == 1) { + mcontext.gregs[REG_EBX] |= 1 << 8; + } else { + mcontext.gregs[REG_EBX] |= 2 << 8; + } + } + + //Dos4gw install check + if(ax == 0xFF00 && dx == 0x0078) { + mcontext.gregs[REG_EAX] &= 0xFFFFFF00; + mcontext.gregs[REG_EAX] |= 1; + //should possible set GS... well fuck. + } } -static void dpmi_functions(mcontext_t&) { +static void dpmi_functions(mcontext_t& mcontext, long unsigned int& flags) { + uint16_t ax = mcontext.gregs[REG_EAX] & 0x0000FFFF; + //Get Segment base address + if (ax == 0x0006) { + mcontext.gregs[REG_ECX] &= 0xFFFF0000; + mcontext.gregs[REG_EDX] &= 0xFFFF0000; + flags = 0; + } } |