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refactor: Relocation::replace_func
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renamed from write_func, removed xbyak dependency
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shad0wshayd3 committed Nov 16, 2024
1 parent db57731 commit 5dff207
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Showing 2 changed files with 33 additions and 44 deletions.
45 changes: 33 additions & 12 deletions include/REL/Relocation.h
Original file line number Diff line number Diff line change
Expand Up @@ -278,6 +278,39 @@ namespace REL
return stl::unrestricted_cast<value_type>(_address);
}

template <std::ptrdiff_t O = 0>
void replace_func(const std::size_t a_count, const std::uintptr_t a_dst)
requires(std::same_as<value_type, std::uintptr_t>)
{
#pragma pack(push, 1)
struct Assembly
{
std::uint8_t jmp;
std::uint8_t modrm;
std::int32_t disp;
std::uint64_t addr;
};
static_assert(sizeof(Assembly) == 0xE);
#pragma pack(pop)

Assembly assembly{
.jmp = static_cast<std::uint8_t>(0xFF),
.modrm = static_cast<std::uint8_t>(0x25),
.disp = static_cast<std::int32_t>(0),
.addr = static_cast<std::uint64_t>(a_dst),
};

safe_fill(address() + O, INT3, a_count);
safe_write(address() + O, &assembly, sizeof(assembly));
}

template <std::ptrdiff_t O = 0, class F>
void replace_func(const std::size_t a_count, const F a_dst)
requires(std::same_as<value_type, std::uintptr_t>)
{
replace_func<O>(a_count, stl::unrestricted_cast<std::uintptr_t>(a_dst));
}

void write(const void* a_src, std::size_t a_count)
requires(std::same_as<value_type, std::uintptr_t>)
{
Expand Down Expand Up @@ -338,18 +371,6 @@ namespace REL
safe_fill(address(), a_value, a_count);
}

#ifdef SFSE_SUPPORT_XBYAK
void write_func(const std::size_t a_count, const std::uintptr_t a_dst)
requires(std::same_as<value_type, std::uintptr_t>);

template <class F>
void write_func(const std::size_t a_count, const F a_dst)
requires(std::same_as<value_type, std::uintptr_t>)
{
write_func(a_count, stl::unrestricted_cast<std::uintptr_t>(a_dst));
}
#endif

constexpr std::uintptr_t write_vfunc(const std::size_t a_idx, const std::uintptr_t a_newFunc)
requires(std::same_as<value_type, std::uintptr_t>)
{
Expand Down
32 changes: 0 additions & 32 deletions src/REL/Relocation.cpp

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