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This commit is contained in:
Lysann Tranvouez 2025-10-01 21:19:29 +02:00
parent 82e6abc1ee
commit a63de06aa9
1 changed files with 304 additions and 318 deletions
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194
src/arm64/detours_arm64_disasm.cpp
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@ -36,10 +36,8 @@
// TBZ z0110110 bbbbbiii iiiiiiii iiittttt & 0x7f000000 == 0x36000000 (z = size, b = bitnum, i = SignExtend(imm14:00, 64), t = Rt)
//
namespace detour_arm64_disasm
union detour_arm64_disasm_add_imm12
{
union add_imm12
{
uint32_t assembled;
struct
{
@ -52,7 +50,7 @@ namespace detour_arm64_disasm
} s;
static uint32_t assemble(uint32_t size, uint32_t rd, uint32_t rn, uint32_t imm, uint32_t shift)
{
add_imm12 temp;
detour_arm64_disasm_add_imm12 temp;
temp.s.rd = rd;
temp.s.rn = rn;
temp.s.imm12 = imm & 0xfff;
@ -63,10 +61,10 @@ namespace detour_arm64_disasm
}
static uint32_t assemble_add_32(const uint32_t rd, const uint32_t rn, const uint32_t imm, const uint32_t shift) { return assemble(0, rd, rn, imm, shift); }
static uint32_t assemble_add_64(const uint32_t rd, const uint32_t rn, const uint32_t imm, const uint32_t shift) { return assemble(1, rd, rn, imm, shift); }
};
};
union adr19
{
union detour_arm64_disasm_adr19
{
uint32_t assembled;
struct
{
@ -79,7 +77,7 @@ namespace detour_arm64_disasm
inline int32_t imm() const { uint32_t Imm = (s.imm19 << 2) | s.imm2; return (int32_t)(Imm << 11) >> 11; }
static uint32_t assemble(uint32_t type, uint32_t rd, int32_t delta)
{
adr19 temp;
detour_arm64_disasm_adr19 temp;
temp.s.rd = rd;
temp.s.imm19 = (delta >> 2) & 0x7ffff;
temp.s.opcode1 = 0x10;
@ -89,10 +87,10 @@ namespace detour_arm64_disasm
}
static uint32_t assemble_adr(uint32_t rd, int32_t delta) { return assemble(0, rd, delta); }
static uint32_t assemble_adrp(uint32_t rd, int32_t delta) { return assemble(1, rd, delta); }
};
};
union bcc19
{
union detour_arm64_disasm_bcc19
{
uint32_t assembled;
struct
{
@ -104,17 +102,17 @@ namespace detour_arm64_disasm
inline int32_t imm() const { return (int32_t)(s.imm19 << 13) >> 11; }
static uint32_t assemble_bcc(uint32_t condition, int32_t delta)
{
bcc19 temp;
detour_arm64_disasm_bcc19 temp;
temp.s.condition = condition;
temp.s.opcode1 = 0;
temp.s.imm19 = delta >> 2;
temp.s.opcode2 = 0x54;
return temp.assembled;
}
};
};
union branch26
{
union detour_arm64_disasm_branch26
{
uint32_t assembled;
struct
{
@ -125,7 +123,7 @@ namespace detour_arm64_disasm
inline int32_t imm() const { return (int32_t)(s.imm26 << 6) >> 4; }
static uint32_t assemble(uint32_t link, int32_t delta)
{
branch26 temp;
detour_arm64_disasm_branch26 temp;
temp.s.imm26 = delta >> 2;
temp.s.opcode1 = 0x5;
temp.s.link = link;
@ -133,10 +131,10 @@ namespace detour_arm64_disasm
}
static uint32_t assemble_b(int32_t delta) { return assemble(0, delta); }
static uint32_t assemble_bl(int32_t delta) { return assemble(1, delta); }
};
};
union br
{
union detour_arm64_disasm_br
{
uint32_t assembled;
struct
{
@ -147,7 +145,7 @@ namespace detour_arm64_disasm
} s;
static uint32_t assemble(uint32_t rn, bool link)
{
br temp;
detour_arm64_disasm_br temp;
temp.s.opcode1 = 0;
temp.s.rn = rn;
temp.s.opcode2 = 0x3587c0;
@ -163,10 +161,10 @@ namespace detour_arm64_disasm
{
return assemble(rn, true);
}
};
};
union cbz19
{
union detour_arm64_disasm_cbz19
{
uint32_t assembled;
struct
{
@ -179,7 +177,7 @@ namespace detour_arm64_disasm
inline int32_t imm() const { return (int32_t)(s.imm19 << 13) >> 11; }
static uint32_t assemble(uint32_t size, uint32_t nz, uint32_t rt, int32_t delta)
{
cbz19 temp;
detour_arm64_disasm_cbz19 temp;
temp.s.rt = rt;
temp.s.imm19 = delta >> 2;
temp.s.nz = nz;
@ -187,10 +185,10 @@ namespace detour_arm64_disasm
temp.s.size = size;
return temp.assembled;
}
};
};
union ldr_lit19
{
union detour_arm64_disasm_ldr_lit19
{
uint32_t assembled;
struct
{
@ -204,7 +202,7 @@ namespace detour_arm64_disasm
inline int32_t imm() const { return (int32_t)(s.imm19 << 13) >> 11; }
static uint32_t assemble(uint32_t size, uint32_t fpneon, uint32_t rt, int32_t delta)
{
ldr_lit19 temp;
detour_arm64_disasm_ldr_lit19 temp;
temp.s.rt = rt;
temp.s.imm19 = delta >> 2;
temp.s.opcode1 = 0;
@ -213,10 +211,10 @@ namespace detour_arm64_disasm
temp.s.size = size;
return temp.assembled;
}
};
};
union ldr_fp_neon_imm9
{
union detour_arm64_disasm_ldr_fp_neon_imm9
{
uint32_t assembled;
struct
{
@ -230,7 +228,7 @@ namespace detour_arm64_disasm
} s;
static uint32_t assemble(uint32_t size, uint32_t rt, uint32_t rn, uint32_t imm)
{
ldr_fp_neon_imm9 temp;
detour_arm64_disasm_ldr_fp_neon_imm9 temp;
temp.s.rt = rt;
temp.s.rn = rn;
temp.s.imm12 = imm;
@ -240,10 +238,10 @@ namespace detour_arm64_disasm
temp.s.size = size & 3;
return temp.assembled;
}
};
};
union mov16
{
union detour_arm64_disasm_mov16
{
uint32_t assembled;
struct
{
@ -256,7 +254,7 @@ namespace detour_arm64_disasm
} s;
static uint32_t assemble(uint32_t size, uint32_t type, uint32_t rd, uint32_t imm, uint32_t shift)
{
mov16 temp;
detour_arm64_disasm_mov16 temp;
temp.s.rd = rd;
temp.s.imm16 = imm;
temp.s.shift = shift;
@ -271,10 +269,10 @@ namespace detour_arm64_disasm
static uint32_t assemble_movz64(uint32_t rd, uint32_t imm, uint32_t shift) { return assemble(1, 2, rd, imm, shift); }
static uint32_t assemble_movk32(uint32_t rd, uint32_t imm, uint32_t shift) { return assemble(0, 3, rd, imm, shift); }
static uint32_t assemble_movk64(uint32_t rd, uint32_t imm, uint32_t shift) { return assemble(1, 3, rd, imm, shift); }
};
};
union tbz14
{
union detour_arm64_disasm_tbz14
{
uint32_t assembled;
struct
{
@ -288,7 +286,7 @@ namespace detour_arm64_disasm
inline int32_t imm() const { return (int32_t)(s.imm14 << 18) >> 16; }
static uint32_t assemble(uint32_t size, uint32_t nz, uint32_t rt, uint32_t bit, int32_t delta)
{
tbz14 temp;
detour_arm64_disasm_tbz14 temp;
temp.s.rt = rt;
temp.s.imm14 = delta >> 2;
temp.s.bit = bit;
@ -297,30 +295,20 @@ namespace detour_arm64_disasm
temp.s.size = size;
return temp.assembled;
}
};
static uint8_t pure_copy32(uint8_t* source, uint8_t* dest);
static uint8_t emit_mov_immediate(uint32_t*& dst_inst, uint8_t rd, uint64_t immediate);
static uint8_t copy_adr(uint8_t* source, uint8_t* dest, uint32_t instruction) ;
static uint8_t copy_bcc(uint8_t* source, uint8_t* dest, uint32_t instruction);
static uint8_t copy_b_or_bl(uint8_t* source, uint8_t* dest, uint32_t instruction, bool link);
static uint8_t copy_cbz(uint8_t* source, uint8_t* dest, uint32_t instruction);
static uint8_t copy_tbz(uint8_t* source, uint8_t* dest, uint32_t instruction);
static uint8_t copy_ldr_literal(uint8_t* source, uint8_t* dest, uint32_t instruction);
static uint32_t get_instruction(uint8_t* source)
{
return ((uint32_t*)source)[0];
}
static uint8_t emit_instruction(uint32_t*& dst_inst, uint32_t instruction)
{
*dst_inst++ = instruction;
return sizeof(uint32_t);
}
};
uint8_t detour_arm64_disasm::pure_copy32(uint8_t* source, uint8_t* dest)
static uint32_t get_instruction(uint8_t* source)
{
return ((uint32_t*)source)[0];
}
static uint8_t emit_instruction(uint32_t*& dst_inst, uint32_t instruction)
{
*dst_inst++ = instruction;
return sizeof(uint32_t);
};
uint8_t pure_copy32(uint8_t* source, uint8_t* dest)
{
*(uint32_t *)dest = *(uint32_t*)source;
return sizeof(uint32_t);
@ -329,7 +317,7 @@ uint8_t detour_arm64_disasm::pure_copy32(uint8_t* source, uint8_t* dest)
/////////////////////////////////////////////////////////// Disassembler Code.
//
uint8_t detour_arm64_disasm::emit_mov_immediate(uint32_t*& dst_inst, uint8_t rd, uint64_t immediate)
uint8_t emit_mov_immediate(uint32_t*& dst_inst, uint8_t rd, uint64_t immediate)
{
uint32_t piece[4];
piece[3] = (uint32_t)((immediate >> 48) & 0xffff);
@ -341,7 +329,7 @@ uint8_t detour_arm64_disasm::emit_mov_immediate(uint32_t*& dst_inst, uint8_t rd,
// special case: MOVN with 32-bit dest
if (piece[3] == 0 && piece[2] == 0 && piece[1] == 0xffff)
{
emit_instruction(dst_inst, mov16::assemble_movn32(rd, piece[0] ^ 0xffff, 0));
emit_instruction(dst_inst, detour_arm64_disasm_mov16::assemble_movn32(rd, piece[0] ^ 0xffff, 0));
count++;
}
@ -362,17 +350,17 @@ uint8_t detour_arm64_disasm::emit_mov_immediate(uint32_t*& dst_inst, uint8_t rd,
{
if (default_piece == 0xffff)
{
emit_instruction(dst_inst, mov16::assemble_movn64(rd, cur_piece ^ 0xffff, piece_num));
emit_instruction(dst_inst, detour_arm64_disasm_mov16::assemble_movn64(rd, cur_piece ^ 0xffff, piece_num));
}
else
{
emit_instruction(dst_inst, mov16::assemble_movz64(rd, cur_piece, piece_num));
emit_instruction(dst_inst, detour_arm64_disasm_mov16::assemble_movz64(rd, cur_piece, piece_num));
}
first = false;
}
else
{
emit_instruction(dst_inst, mov16::assemble_movk64(rd, cur_piece, piece_num));
emit_instruction(dst_inst, detour_arm64_disasm_mov16::assemble_movk64(rd, cur_piece, piece_num));
}
}
}
@ -380,9 +368,9 @@ uint8_t detour_arm64_disasm::emit_mov_immediate(uint32_t*& dst_inst, uint8_t rd,
return (uint8_t)(count * sizeof(uint32_t));
}
uint8_t detour_arm64_disasm::copy_adr(uint8_t* source, uint8_t* dest, uint32_t instruction)
uint8_t copy_adr(uint8_t* source, uint8_t* dest, uint32_t instruction)
{
adr19& decoded = (adr19&)(instruction);
detour_arm64_disasm_adr19& decoded = (detour_arm64_disasm_adr19&)(instruction);
uint32_t* dst_inst = (uint32_t*)(dest);
// ADR case
@ -395,14 +383,14 @@ uint8_t detour_arm64_disasm::copy_adr(uint8_t* source, uint8_t* dest, uint32_t i
// output as ADR
if (delta >= -(1 << 20) && delta < (1 << 20))
{
emit_instruction(dst_inst, adr19::assemble_adr(decoded.s.rd, (int32_t)delta));
emit_instruction(dst_inst, detour_arm64_disasm_adr19::assemble_adr(decoded.s.rd, (int32_t)delta));
}
// output as ADRP; ADD
else if (delta_page >= -(1 << 20) && (delta_page < (1 << 20)))
{
emit_instruction(dst_inst, adr19::assemble_adrp(decoded.s.rd, (int32_t)delta_page));
emit_instruction(dst_inst, add_imm12::assemble_add_32(decoded.s.rd, decoded.s.rd, ((std::ptrdiff_t)target) & 0xfff, 0));
emit_instruction(dst_inst, detour_arm64_disasm_adr19::assemble_adrp(decoded.s.rd, (int32_t)delta_page));
emit_instruction(dst_inst, detour_arm64_disasm_add_imm12::assemble_add_32(decoded.s.rd, decoded.s.rd, ((std::ptrdiff_t)target) & 0xfff, 0));
}
// output as immediate move
@ -421,7 +409,7 @@ uint8_t detour_arm64_disasm::copy_adr(uint8_t* source, uint8_t* dest, uint32_t i
// output as ADRP
if (delta_page >= -(1 << 20) && (delta_page < (1 << 20)))
{
emit_instruction(dst_inst, adr19::assemble_adrp(decoded.s.rd, (int32_t)delta_page));
emit_instruction(dst_inst, detour_arm64_disasm_adr19::assemble_adrp(decoded.s.rd, (int32_t)delta_page));
}
// output as immediate move
@ -434,9 +422,9 @@ uint8_t detour_arm64_disasm::copy_adr(uint8_t* source, uint8_t* dest, uint32_t i
return (uint8_t)((uint8_t*)dst_inst - dest);
}
uint8_t detour_arm64_disasm::copy_bcc(uint8_t* source, uint8_t* dest, uint32_t instruction)
uint8_t copy_bcc(uint8_t* source, uint8_t* dest, uint32_t instruction)
{
bcc19& decoded = (bcc19&)(instruction);
detour_arm64_disasm_bcc19& decoded = (detour_arm64_disasm_bcc19&)(instruction);
uint32_t* dst_inst = (uint32_t*)(dest);
uint8_t* target = source + decoded.imm();
@ -446,30 +434,30 @@ uint8_t detour_arm64_disasm::copy_bcc(uint8_t* source, uint8_t* dest, uint32_t i
// output as BCC
if (delta >= -(1 << 20) && delta < (1 << 20))
{
emit_instruction(dst_inst, bcc19::assemble_bcc(decoded.s.condition, (int32_t)delta));
emit_instruction(dst_inst, detour_arm64_disasm_bcc19::assemble_bcc(decoded.s.condition, (int32_t)delta));
}
// output as BCC <skip>; B
else if (delta4 >= -(1 << 27) && (delta4 < (1 << 27)))
{
emit_instruction(dst_inst, bcc19::assemble_bcc(decoded.s.condition ^ 1, 8));
emit_instruction(dst_inst, branch26::assemble_b((int32_t)delta4));
emit_instruction(dst_inst, detour_arm64_disasm_bcc19::assemble_bcc(decoded.s.condition ^ 1, 8));
emit_instruction(dst_inst, detour_arm64_disasm_branch26::assemble_b((int32_t)delta4));
}
// output as MOV x17, Target; BCC <skip>; BR x17 (BIG assumption that x17 isn't being used for anything!!)
else
{
emit_mov_immediate(dst_inst, 17, (std::ptrdiff_t)target);
emit_instruction(dst_inst, bcc19::assemble_bcc(decoded.s.condition ^ 1, 8));
emit_instruction(dst_inst, br::assemble_br(17));
emit_instruction(dst_inst, detour_arm64_disasm_bcc19::assemble_bcc(decoded.s.condition ^ 1, 8));
emit_instruction(dst_inst, detour_arm64_disasm_br::assemble_br(17));
}
return (uint8_t)((uint8_t*)dst_inst - dest);
}
uint8_t detour_arm64_disasm::copy_b_or_bl(uint8_t* source, uint8_t* dest, uint32_t instruction, bool link)
uint8_t copy_b_or_bl(uint8_t* source, uint8_t* dest, uint32_t instruction, bool link)
{
branch26& decoded = (branch26&)(instruction);
detour_arm64_disasm_branch26& decoded = (detour_arm64_disasm_branch26&)(instruction);
uint32_t* dst_inst = (uint32_t*)(dest);
uint8_t* target = source + decoded.imm();
@ -478,22 +466,22 @@ uint8_t detour_arm64_disasm::copy_b_or_bl(uint8_t* source, uint8_t* dest, uint32
// output as B or BRL
if (delta >= -(1 << 27) && (delta < (1 << 27)))
{
emit_instruction(dst_inst, branch26::assemble(link, (int32_t)delta));
emit_instruction(dst_inst, detour_arm64_disasm_branch26::assemble(link, (int32_t)delta));
}
// output as MOV x17, Target; BR or BRL x17 (BIG assumption that x17 isn't being used for anything!!)
else
{
emit_mov_immediate(dst_inst, 17, (std::ptrdiff_t)target);
emit_instruction(dst_inst, br::assemble(17, link));
emit_instruction(dst_inst, detour_arm64_disasm_br::assemble(17, link));
}
return (uint8_t)((uint8_t*)dst_inst - dest);
}
uint8_t detour_arm64_disasm::copy_cbz(uint8_t* source, uint8_t* dest, uint32_t instruction)
uint8_t copy_cbz(uint8_t* source, uint8_t* dest, uint32_t instruction)
{
cbz19& decoded = (cbz19&)(instruction);
detour_arm64_disasm_cbz19& decoded = (detour_arm64_disasm_cbz19&)(instruction);
uint32_t* dst_inst = (uint32_t*)(dest);
uint8_t* target = source + decoded.imm();
@ -503,30 +491,30 @@ uint8_t detour_arm64_disasm::copy_cbz(uint8_t* source, uint8_t* dest, uint32_t i
// output as CBZ/NZ
if (delta >= -(1 << 20) && delta < (1 << 20))
{
emit_instruction(dst_inst, cbz19::assemble(decoded.s.size, decoded.s.nz, decoded.s.rt, (int32_t)delta));
emit_instruction(dst_inst, detour_arm64_disasm_cbz19::assemble(decoded.s.size, decoded.s.nz, decoded.s.rt, (int32_t)delta));
}
// output as CBNZ/Z <skip>; B
else if (delta4 >= -(1 << 27) && (delta4 < (1 << 27)))
{
emit_instruction(dst_inst, cbz19::assemble(decoded.s.size, decoded.s.nz ^ 1, decoded.s.rt, 8));
emit_instruction(dst_inst, branch26::assemble_b((int32_t)delta4));
emit_instruction(dst_inst, detour_arm64_disasm_cbz19::assemble(decoded.s.size, decoded.s.nz ^ 1, decoded.s.rt, 8));
emit_instruction(dst_inst, detour_arm64_disasm_branch26::assemble_b((int32_t)delta4));
}
// output as MOV x17, Target; CBNZ/Z <skip>; BR x17 (BIG assumption that x17 isn't being used for anything!!)
else
{
emit_mov_immediate(dst_inst, 17, (std::ptrdiff_t)target);
emit_instruction(dst_inst, cbz19::assemble(decoded.s.size, decoded.s.nz ^ 1, decoded.s.rt, 8));
emit_instruction(dst_inst, br::assemble_br(17));
emit_instruction(dst_inst, detour_arm64_disasm_cbz19::assemble(decoded.s.size, decoded.s.nz ^ 1, decoded.s.rt, 8));
emit_instruction(dst_inst, detour_arm64_disasm_br::assemble_br(17));
}
return (uint8_t)((uint8_t*)dst_inst - dest);
}
uint8_t detour_arm64_disasm::copy_tbz(uint8_t* source, uint8_t* dest, uint32_t instruction)
uint8_t copy_tbz(uint8_t* source, uint8_t* dest, uint32_t instruction)
{
tbz14& decoded = (tbz14&)(instruction);
detour_arm64_disasm_tbz14& decoded = (detour_arm64_disasm_tbz14&)(instruction);
uint32_t* dst_inst = (uint32_t*)(dest);
uint8_t* target = source + decoded.imm();
@ -536,30 +524,30 @@ uint8_t detour_arm64_disasm::copy_tbz(uint8_t* source, uint8_t* dest, uint32_t i
// output as TBZ/NZ
if (delta >= -(1 << 13) && delta < (1 << 13))
{
emit_instruction(dst_inst, tbz14::assemble(decoded.s.size, decoded.s.nz, decoded.s.rt, decoded.s.bit, (int32_t)delta));
emit_instruction(dst_inst, detour_arm64_disasm_tbz14::assemble(decoded.s.size, decoded.s.nz, decoded.s.rt, decoded.s.bit, (int32_t)delta));
}
// output as TBNZ/Z <skip>; B
else if (delta4 >= -(1 << 27) && (delta4 < (1 << 27)))
{
emit_instruction(dst_inst, tbz14::assemble(decoded.s.size, decoded.s.nz ^ 1, decoded.s.rt, decoded.s.bit, 8));
emit_instruction(dst_inst, branch26::assemble_b((int32_t)delta4));
emit_instruction(dst_inst, detour_arm64_disasm_tbz14::assemble(decoded.s.size, decoded.s.nz ^ 1, decoded.s.rt, decoded.s.bit, 8));
emit_instruction(dst_inst, detour_arm64_disasm_branch26::assemble_b((int32_t)delta4));
}
// output as MOV x17, Target; TBNZ/Z <skip>; BR x17 (BIG assumption that x17 isn't being used for anything!!)
else
{
emit_mov_immediate(dst_inst, 17, (std::ptrdiff_t)target);
emit_instruction(dst_inst, tbz14::assemble(decoded.s.size, decoded.s.nz ^ 1, decoded.s.rt, decoded.s.bit, 8));
emit_instruction(dst_inst, br::assemble_br(17));
emit_instruction(dst_inst, detour_arm64_disasm_tbz14::assemble(decoded.s.size, decoded.s.nz ^ 1, decoded.s.rt, decoded.s.bit, 8));
emit_instruction(dst_inst, detour_arm64_disasm_br::assemble_br(17));
}
return (uint8_t)((uint8_t*)dst_inst - dest);
}
uint8_t detour_arm64_disasm::copy_ldr_literal(uint8_t* source, uint8_t* dest, uint32_t instruction)
uint8_t copy_ldr_literal(uint8_t* source, uint8_t* dest, uint32_t instruction)
{
ldr_lit19& decoded = (ldr_lit19&)(instruction);
detour_arm64_disasm_ldr_lit19& decoded = (detour_arm64_disasm_ldr_lit19&)(instruction);
uint32_t* dst_inst = (uint32_t*)(dest);
uint8_t* target = source + decoded.imm();
@ -568,7 +556,7 @@ uint8_t detour_arm64_disasm::copy_ldr_literal(uint8_t* source, uint8_t* dest, ui
// output as LDR
if (delta >= -(1 << 21) && delta < (1 << 21))
{
emit_instruction(dst_inst, ldr_lit19::assemble(decoded.s.size, decoded.s.fp_neon, decoded.s.rt, (int32_t)delta));
emit_instruction(dst_inst, detour_arm64_disasm_ldr_lit19::assemble(decoded.s.size, decoded.s.fp_neon, decoded.s.rt, (int32_t)delta));
}
// output as move immediate
@ -588,7 +576,7 @@ uint8_t detour_arm64_disasm::copy_ldr_literal(uint8_t* source, uint8_t* dest, ui
else
{
emit_mov_immediate(dst_inst, 17, (std::ptrdiff_t)target);
emit_instruction(dst_inst, ldr_fp_neon_imm9::assemble(2 + decoded.s.size, decoded.s.rt, 17, 0));
emit_instruction(dst_inst, detour_arm64_disasm_ldr_fp_neon_imm9::assemble(2 + decoded.s.size, decoded.s.rt, 17, 0));
}
return (uint8_t)((uint8_t*)dst_inst - dest);
@ -596,8 +584,6 @@ uint8_t detour_arm64_disasm::copy_ldr_literal(uint8_t* source, uint8_t* dest, ui
uint8_t* internal_detour_copy_instruction(uint8_t* dst, uint8_t* src, uint32_t* out_extra_len)
{
using namespace detour_arm64_disasm;
const uint32_t instruction = get_instruction(src);
uint32_t copied_size;