RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-07 07:47:36 +00:00
Code Issues Activity Actions
11365 commits 1 branch 0 tags 230 MiB
Commit graph

37 commits

Author SHA1 Message Date
Andreas Kling
036ce64cef LibX86: Don't cache whether instruction have a sub-opcode 
We can just check if the first opcode byte is 0x0f to know this.
 2020-07-15 13:42:15 +02:00
Andreas Kling
6a926a8c61 LibX86+UserspaceEmulator: Don't store a32 in MemoryOrRegisterReference 
The a32 bit tells us whether a memory address is 32-bit or not.
We already have this information in Instruction, so just plumb that
around instead of double-caching the bit.
 2020-07-15 13:42:15 +02:00
Andreas Kling
bc66221ee3 LibX86: Don't store the prefix/imm1/imm2 byte counts individually 
We can shrink and simplify Instruction a bit by combining these into
a single "extra bytes" count.
 2020-07-15 13:42:15 +02:00
Andreas Kling
4f8e86ad67 LibX86: Remove Instruction::m_handler 
We can fetch the handler via Instruction::m_descriptor.
 2020-07-15 13:42:15 +02:00
Andreas Kling
ef84865c8c LibX86+UserspaceEmulator: Devirtualize and inline more instruction code 
Use some template hacks to force GCC to inline more of the instruction
decoding stuff into the UserspaceEmulator main execution loop.

This is my last optimization for today, and we've gone from ~60 seconds
when running "UserspaceEmulator UserspaceEmulator id" to ~8 seconds :^)
 2020-07-13 21:00:51 +02:00
Andreas Kling
7ea36f5ed0 LibX86: Don't build_opcode_table_if_needed() every instruction decode 
Instead, just do this once at startup. :^)
 2020-07-13 20:42:37 +02:00
Andreas Kling
868db2313f LibX86: Apply aggressive inlining to Instruction decoding functions 
These functions really benefit from being inlined together instead
of being separated.

This yields roughly a ~2x speedup.
 2020-07-13 20:34:54 +02:00
Andreas Kling
a27473cbc2 UserspaceEmulator+LibX86: Turn on -O3 optimization for emulation code 
Since this code is performance-sensitive, let's have the compiler do
whatever it can to help us with the most important files.

This yields a ~8% speedup.
 2020-07-13 20:23:00 +02:00
Andreas Kling
f1bbc39148 LibX86: ALWAYS_INLINE some Instruction members 2020-07-13 13:50:22 +02:00
Andreas Kling
97f4cebc8d UserspaceEmulator+LibX86: Implement the LEA instruction 
This piggybacks nicely on Instruction's ModR/M resolution code. :^)
 2020-07-11 23:57:14 +02:00
Andreas Kling
0cf7fd5268 UserspaceEmulator+LibX86: Implement all the forms of XOR 
And they're all generic, which will make it easy to support more ops.
 2020-07-10 20:20:27 +02:00
Andreas Kling
45bfdd0063 LibX86: Add a templatized way to resolve ModR/M memory references 
Hopefully this will be flexible enough for our SoftCPU. :^)
 2020-07-10 20:20:27 +02:00
Andreas Kling
3a1cf9505d LibX86: Store Instruction's segment prefix as Optional<SegmentRegister> 
Instead of having a dedicated enum value for the empty state.
 2020-07-10 20:20:27 +02:00
Andreas Kling
4d8683b632 UserspaceEmulator: Tidy up SoftCPU's general purpose registers 
This patch adds a PartAddressableRegister type, which divides a 32-bit
value into separate parts needed for the EAX/AX/AL/AH register splits.

Clean up the code around register access to make it a little less
cumbersome to use.
 2020-07-09 23:27:50 +02:00
Andreas Kling
6440e59ead LibX86: Expose some more things on X86::Instruction 2020-07-07 22:44:58 +02:00
Andreas Kling
7ab2a4dde7 LibX86: Add an abstract X86::Interpreter class 
This abstract class has a pure virtual member function for all of the
X86 instructions. This can be used to implement.. something. :^)
 2020-07-07 22:44:58 +02:00
Andreas Kling
b2a7943b4e LibX86: Disassemble the XADD instruction 
This makes functrace usable again :^)
 2020-06-28 21:10:53 +02:00
Sergey Bugaev
450a2a0f9c Build: Switch to CMake :^) 
Closes https://github.com/SerenityOS/serenity/issues/2080
 2020-05-14 20:15:18 +02:00
Linus Groh
57f68ac5d7 LibX86: Rename build0FSlash() to build_0f_slash() 
As spotted by @heavyk this was missed in 57b2b96.
 2020-05-07 12:22:36 +02:00
Andreas Kling
a75af443d4 LibX86: Simplify "register index to string" functions a bit 2020-05-04 13:49:15 +02:00
Andreas Kling
57b2b96a67 LibX86: Remove accidental camelCase in some names 2020-05-04 13:49:15 +02:00
Andreas Kling
fec52fa94b LibX86: Disassemble BSWAP 2020-04-30 22:15:16 +02:00
Andreas Kling
3cdf4cd204 LibX86: Use MakeUnsigned<T> from AK instead of making a custom one 2020-04-15 16:58:46 +02:00
Andreas Kling
e880e4c2d2 LibX86: Add a way for Instruction::to_string() to symbolicate addresses 
This patch adds a pure virtual X86::SymbolProvider that can be passed
to Instruction::to_string(). If the instruction contains what appears
to be a program address, stringification will try to symbolicate that
address via the SymbolProvider.

This makes it possible (and very flexible) to add symbolication to
clients of the disassembler. :^)
 2020-04-12 14:20:04 +02:00
Andreas Kling
34d07e35bd LibX86: Decode RDRAND instruction 
I was looking at Kernel::get_good_random_bytes() and wondering where
the RDRAND instruction was. :^)
 2020-04-11 23:37:00 +02:00
Andreas Kling
8daddcfa0a LibX86: Fix duplicate '+' in SIB byte disassembly 
For SIB bytes with base but no index, we were emitting two '+' chars
which looked very off.
 2020-04-11 23:11:10 +02:00
Andreas Kling
4eceea7c62 LibX86: When there are multiple REPZ/REPNZ prefixes, the last one wins 2020-04-11 14:05:10 +02:00
Andreas Kling
1924112d7d LibX86: Tolerate invalid segment register indices when disassembling 
While #6 and #7 are not valid segment register, they can still be
encoded in otherwise-valid instructions, so let's tolerate it.
 2020-04-11 14:00:20 +02:00
Andreas Kling
d7d7a32d47 LibX86: Disassemble unknown opcodes as "db %#02x" 2020-04-11 13:57:28 +02:00
Andreas Kling
95df0847c5 LibX86: Decode PADDB, PADDW and PADDD 2020-04-11 13:57:20 +02:00
Andreas Kling
16455e91db LibX86: Don't choke on invalid LOCK prefixes for now 
This might be interesting information later, but I'm not sure how to
encode it at the moment.
 2020-04-11 13:53:12 +02:00
Andreas Kling
f115416db3 LibX86: Fix backwards arguments to ENTER imm16,imm8 2020-04-11 13:51:00 +02:00
Andreas Kling
cf7d042e0f LibX86: Add 8-bit CMPXCHG and allow LOCK CMPXCHG 2020-04-11 13:46:30 +02:00
Andreas Kling
2ce38d4699 LibX86: Support decoding basic MMX instructions like MOVQ 2020-04-11 13:42:18 +02:00
Andreas Kling
e5cde0082a LibX86: Run the instruction decoder in 32-bit mode by default 
Let's assume a 32-bit execution environment unless otherwise specified.
 2020-04-11 13:24:55 +02:00
Andreas Kling
8f503da93f LibX86: Remove some unnecessary stuff from Disassembler.h 2020-04-11 13:23:52 +02:00
Andreas Kling
32d83fdee4 LibX86: Add an X86 instruction decoder library + basic disassembler 
This will be very useful for developer tools like ProfileView, and also
for future tools like debuggers and such. :^)
 2020-04-11 13:16:17 +02:00