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add a basic structure for disassembler + executor

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Instructions added
Branch and Exchange (BX)
Branch and Link (B)
Multiply and Accumulate (MUL, MLA)
Multiply Long and Accumulate (SMULL, SMLAL, UMULL, UMLAL)
Single data swap (SWP)
[WIP] Halfword Transfer (STRH, LDRH)

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>
This commit is contained in:
Amneesh Singh
2023-09-13 03:44:36 +05:30
parent 904e2b698e
commit 8a04eade92
22 changed files with 571 additions and 50 deletions
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19
src/memory.cc
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@@ -1,7 +1,11 @@
#include "memory.hh"
#include "header.hh"
#include "util/bits.hh"
#include "util/log.hh"
#include "util/utils.hh"
#include <bitset>
using namespace logger;
Memory::Memory(std::array<uint8_t, BIOS_SIZE>&& bios,
std::vector<uint8_t>&& rom) noexcept
@@ -13,20 +17,21 @@ Memory::Memory(std::array<uint8_t, BIOS_SIZE>&& bios,
, oam_obj_attr(0)
, rom(std::move(rom)) {
std::string bios_hash = crypto::sha256(bios.data(), bios.size());
std::string expected_hash =
static constexpr char expected_hash[] =
"fd2547724b505f487e6dcb29ec2ecff3af35a841a77ab2e85fd87350abd36570";
if (bios_hash != expected_hash) {
log_warn("BIOS hash failed to match, run at your own risk",
"\nExpected : ",
log_warn("BIOS hash failed to match, run at your own risk"
"\nExpected : {} "
"\nGot : {}",
expected_hash,
"\nGot : ",
bios_hash);
}
parse_header();
log("Memory successfully initialised");
log_info("Memory successfully initialised");
log_info("Cartridge Title: {}", header.title);
};
#define MATCHES(area) address >= area##_START&& address <= area##_END
@@ -164,7 +169,7 @@ Memory::parse_header() {
break;
default:
log_error("HEADER: invalid unique code: ", rom[0xAC]);
log_error("HEADER: invalid unique code: {}", rom[0xAC]);
}
header.title_code[0] = rom[0xAD];
@@ -194,7 +199,7 @@ Memory::parse_header() {
break;
default:
log_error("HEADER: invalid destination/language - ", rom[0xAF]);
log_error("HEADER: invalid destination/language: {}", rom[0xAF]);
}
if (rom[0xB2] != 0x96)