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ΞηϯϒϦͰֶͿCPUΞʔΩςΫνϟ
akkey / @AkkeyLab
iOSDC Japan 2025
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ྺ࢙తذ
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ྺ࢙తذ
3
https://developer.apple.com/jp/videos/play/wwdc2025/102/?time=3296
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ྺ࢙తذ
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https://developer.apple.com/jp/videos/play/wwdc2025/102/?time=3296
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Macʹ͓͚ΔCPUͷྺ࢙
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Macʹ͓͚ΔCPUͷྺ࢙
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CISC RISC
Complex Instruction Set Computer Reduce Instruction Set Computer
໋ྩ͕ෳࡶ ໋ྩ͕୯७
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Macʹ͓͚ΔCPUͷྺ࢙
7
1984
MC68000
680x0
CISC
ΞʔΩςΫνϟ
ઃܭख๏
CPU
ຌྫ
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Macʹ͓͚ΔCPUͷྺ࢙
8
1984
1992
MC68000
680x0
PowerPC
Power
RISC
CISC
ΞʔΩςΫνϟ
ઃܭख๏
CPU
ຌྫ
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Macʹ͓͚ΔCPUͷྺ࢙
9
1984
1992
2006
Intel
x86
MC68000
680x0
PowerPC
Power
RISC
CISC CISC
ΞʔΩςΫνϟ
ઃܭख๏
CPU
ຌྫ
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Macʹ͓͚ΔCPUͷྺ࢙
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Apple Silicon
Arm
1984
1992
2006
2020
Intel
x86
MC68000
680x0
PowerPC
Power
RISC RISC
CISC CISC
ΞʔΩςΫνϟ
ઃܭख๏
CPU
ຌྫ
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Macʹ͓͚ΔCPUͷྺ࢙
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Apple Silicon
Arm
1984
1992
2006
2020
x86
Rosetta
MC68000
680x0
PowerPC
Power
RISC RISC
CISC CISC
Mac 68K Emulator
Intel
Rosetta 2
ΞʔΩςΫνϟ
Ҡߦπʔϧ
ઃܭख๏
CPU
ຌྫ
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ΞηϯϒϦͰHello, World!
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ΞηϯϒϦͰHello, World!
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ΞηϯϒϦ Ξηϯϒϥ ػցޠ
010100
110101
011010
Ξηϯϒϧ
ʂ
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ΞηϯϒϦͰHello, World!
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ΞηϯϒϦ
Assembly language
ϓϩάϥϛϯάݴޠͷͻͱͭͰɺػցޠͱ1:1ʹରԠͨ͠ݴޠ
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|||||||||||||||
|||||||||||||||
|||||||||||||||
|||||||||||||||
010100
110101
011010
ΞηϯϒϦͰHello, World!
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ػցޠ Χʔωϧ ϋʔυΣΞ
γεςϜίʔϧ
੍ޚ
ʁ
ΞηϯϒϦ
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ΞηϯϒϦͰHello, World!
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γεςϜίʔϧ
System Call
ΧʔωϧʹΑͬͯఏڙ͞Ε͓ͯΓɺ
σʔλͷೖग़ྗϓϩάϥϜͷऴྃͱ໋͍ͬͨྩ͕͋Δ
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ΞηϯϒϦͰHello, World!
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$ man 2 write
γεςϜίʔϧ
ϚχϡΞϧίϚϯυ ໋ྩ໊
ssize_t
write(int fildes, const void *buf, size_t nbyte);
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ssize_t
write(int fildes, const void *buf, size_t nbyte);
ϑΝΠϧ
σΟεΫϦϓλ
0ɿඪ४ೖྗ
1ɿඪ४ग़ྗ
2ɿඪ४Τϥʔग़ྗ
ରྻͷ൪ ग़ྗόΠτ
C
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ssize_t
write(int fildes, const void *buf, size_t nbyte);
ΞηϯϒϦͰHello, World!
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mov x0, #1
adr x1, greeting
mov x2, #14
greeting: .ascii "Hello, World!\n"
1 5 10 14
C
ASSEMBLY
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ΞηϯϒϦͰHello, World!
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mov x0, #1
Φϖίʔυ Φϖϥϯυ
Move #1 x0
to
ಡΈํɿ
Ϩδελ
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ssize_t
write(int fildes, const void *buf, size_t nbyte);
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mov x0, #1
adr x1, greeting
mov x2, #14
greeting: .ascii "Hello, World!\n"
1 5 10 14
C
ASSEMBLY
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ssize_t
write(int fildes, const void *buf, size_t nbyte);
ΞηϯϒϦͰHello, World!
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mov x16, #4
svc #0x80
C
ASSEMBLY
ಛผͳׂΓࠐΈ໋ྩ
Supervisor Call
γεςϜίʔϧϑΝΠϧ͔Βஅ
syscall.h*
*/Library/Developer/CommandLineTools/SDKs/MacOSX{version_number}.sdk/System/Library/Frameworks/Kernel.framework/Versions/A/Headers/sys/syscall.h
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ΞηϯϒϦͰHello, World!
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$ man 2 _exit
γεςϜίʔϧ
ϚχϡΞϧίϚϯυ ໋ྩ໊
void
_exit(int status);
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void
_exit(int status);
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mov x0, #0
mov x16, #1
svc #0x80
C
ASSEMBLY
ऴྃεςʔλε
ਖ਼ৗऴྃɿ0
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mov x0, #1
adr x1, greeting
mov x2, #14
mov x16, #4
svc #0x80
mov x0, #0
mov x16, #1
svc #0x80
greeting: .ascii "Hello, World!\n"
Arm x86
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ΞηϯϒϦͰHello, World!
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mov x0, #1
adr x1, greeting
mov x2, #14
mov x16, #4
svc #0x80
mov x0, #0
mov x16, #1
svc #0x80
greeting: .ascii "Hello, World!\n"
mov $1, %rdi
lea greeting(%rip), %rsi
mov $14, %rdx
mov $0x2000004, %rax
syscall
xor %rdi, %rdi
mov $0x2000001, %rax
syscall
Arm x86
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ελοΫτϨʔεΛಡΈղ͘
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ελοΫτϨʔεΛಡΈղ͘
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ελοΫτϨʔεΛಡΈղ͘
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import SwiftUI
let f: (() -> Void)? = nil
@main
struct CrashCodeApp: App {
init() {
f!()
}
var body: some Scene {
WindowGroup {}
}
}
Thread 1: Fatal error: Unexpectedly found nil while unwrapping an Optional value
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0x1957e5eec <+0>: sub sp, sp, #0xa0
0x1957e5ef0 <+4>: stp x22, x21, [sp, #0x80]
0x1957e5ef4 <+8>: stp x29, x30, [sp, #0x90]
0x1957e5ef8 <+12>: add x29, sp, #0x90
0x1957e5efc <+16>: ldr w9, [x29, #0x20]
0x1957e5f00 <+20>: ldr x10, [x29, #0x18]
0x1957e5f04 <+24>: ldrb w8, [x29, #0x10]
0x1957e5f08 <+28>: stp x3, x4, [sp, #0x30]
0x1957e5f0c <+32>: strb w5, [sp, #0x40]
0x1957e5f10 <+36>: stp x6, x7, [sp, #0x48]
0x1957e5f14 <+40>: strb w8, [sp, #0x58]
0x1957e5f18 <+44>: str x10, [sp, #0x60]
0x1957e5f1c <+48>: str w9, [sp, #0x68]
0x1957e5f20 <+52>: tbnz w2, #0x0, 0x1957e5f30 ; <+68>
0x1957e5f24 <+56>: cbnz x0, 0x1957e5f6c ; <+128>
0x1957e5f28 <+60>: mov w8, #0x88 ; =136
0x1957e5f2c <+64>: b 0x1957e5f9c ; <+176>
ελοΫτϨʔεΛಡΈղ͘
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0x1957e5eec <+0>: sub sp, sp, #0xa0
0x1957e5ef0 <+4>: stp x22, x21, [sp, #0x80]
0x1957e5ef4 <+8>: stp x29, x30, [sp, #0x90]
0x1957e5ef8 <+12>: add x29, sp, #0x90
0x1957e5efc <+16>: ldr w9, [x29, #0x20]
0x1957e5f00 <+20>: ldr x10, [x29, #0x18]
0x1957e5f04 <+24>: ldrb w8, [x29, #0x10]
0x1957e5f08 <+28>: stp x3, x4, [sp, #0x30]
0x1957e5f0c <+32>: strb w5, [sp, #0x40]
0x1957e5f10 <+36>: stp x6, x7, [sp, #0x48]
0x1957e5f14 <+40>: strb w8, [sp, #0x58]
0x1957e5f18 <+44>: str x10, [sp, #0x60]
0x1957e5f1c <+48>: str w9, [sp, #0x68]
0x1957e5f20 <+52>: tbnz w2, #0x0, 0x1957e5f30 ; <+68>
0x1957e5f24 <+56>: cbnz x0, 0x1957e5f6c ; <+128>
0x1957e5f28 <+60>: mov w8, #0x88 ; =136
0x1957e5f2c <+64>: b 0x1957e5f9c ; <+176>
ελοΫτϨʔεΛಡΈղ͘
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Φϖίʔυ
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0x1957e5eec <+0>: sub sp, sp, #0xa0
0x1957e5ef0 <+4>: stp x22, x21, [sp, #0x80]
0x1957e5ef4 <+8>: stp x29, x30, [sp, #0x90]
0x1957e5ef8 <+12>: add x29, sp, #0x90
0x1957e5efc <+16>: ldr w9, [x29, #0x20]
0x1957e5f00 <+20>: ldr x10, [x29, #0x18]
0x1957e5f04 <+24>: ldrb w8, [x29, #0x10]
0x1957e5f08 <+28>: stp x3, x4, [sp, #0x30]
0x1957e5f0c <+32>: strb w5, [sp, #0x40]
0x1957e5f10 <+36>: stp x6, x7, [sp, #0x48]
0x1957e5f14 <+40>: strb w8, [sp, #0x58]
0x1957e5f18 <+44>: str x10, [sp, #0x60]
0x1957e5f1c <+48>: str w9, [sp, #0x68]
0x1957e5f20 <+52>: tbnz w2, #0x0, 0x1957e5f30 ; <+68>
0x1957e5f24 <+56>: cbnz x0, 0x1957e5f6c ; <+128>
0x1957e5f28 <+60>: mov w8, #0x88 ; =136
0x1957e5f2c <+64>: b 0x1957e5f9c ; <+176>
ελοΫτϨʔεΛಡΈղ͘
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Φϖϥϯυ
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ελοΫτϨʔεΛಡΈղ͘
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సૹ
ذ
ܭࢉ
ذઌͷώϯτ
0x1957e5eec <+0>: sub sp, sp, #0xa0
0x1957e5ef0 <+4>: stp x22, x21, [sp, #0x80]
0x1957e5ef4 <+8>: stp x29, x30, [sp, #0x90]
0x1957e5ef8 <+12>: add x29, sp, #0x90
0x1957e5efc <+16>: ldr w9, [x29, #0x20]
0x1957e5f00 <+20>: ldr x10, [x29, #0x18]
0x1957e5f04 <+24>: ldrb w8, [x29, #0x10]
0x1957e5f08 <+28>: stp x3, x4, [sp, #0x30]
0x1957e5f0c <+32>: strb w5, [sp, #0x40]
0x1957e5f10 <+36>: stp x6, x7, [sp, #0x48]
0x1957e5f14 <+40>: strb w8, [sp, #0x58]
0x1957e5f18 <+44>: str x10, [sp, #0x60]
0x1957e5f1c <+48>: str w9, [sp, #0x68]
0x1957e5f20 <+52>: tbnz w2, #0x0, 0x1957e5f30 ; <+68>
0x1957e5f24 <+56>: cbnz x0, 0x1957e5f6c ; <+128>
0x1957e5f28 <+60>: mov w8, #0x88 ; =136
0x1957e5f2c <+64>: b 0x1957e5f9c ; <+176>
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ελοΫτϨʔεΛಡΈղ͘
34
సૹ
ذ
ܭࢉ
0x1957e5f20 <+52>: tbnz w2, #0x0, 0x1957e5f30 ; <+68>
0x1957e5f24 <+56>: cbnz x0, 0x1957e5f6c ; <+128>
0x1957e5f28 <+60>: mov w8, #0x88 ; =136
0x1957e5f2c <+64>: b 0x1957e5f9c ; <+176>
0x1957e5f9c <+176>: str wzr, [sp, #0x10]
0x1957e5fa0 <+180>: str x8, [sp, #0x8]
0x1957e5fa4 <+184>: mov w8, #0x2 ; =2
0x1957e5fa8 <+188>: strb w8, [sp]
0x1957e5fac <+192>: adrp x0, 1047
0x1957e5fb0 <+196>: add x0, x0, #0x494 ; "Fatal error"
0x1957e5fb4 <+200>: adrp x3, 1047
0x1957e5fb8 <+204>: add x3, x3, #0x750;"Unexpectedly found nil while
unwrapping an Optional value"
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ελοΫτϨʔεΛಡΈղ͘
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0x1957e5f20 <+52>: tbnz w2, #0x0, 0x1957e5f30 ; <+68>
0x1957e5f24 <+56>: cbnz x0, 0x1957e5f6c ; <+128>
0x1957e5f28 <+60>: mov w8, #0x88 ; =136
0x1957e5f2c <+64>: b 0x1957e5f9c ; <+176>
0x1957e5f9c <+176>: str wzr, [sp, #0x10]
0x1957e5fa0 <+180>: str x8, [sp, #0x8]
0x1957e5fa4 <+184>: mov w8, #0x2 ; =2
0x1957e5fa8 <+188>: strb w8, [sp]
0x1957e5fac <+192>: adrp x0, 1047
0x1957e5fb0 <+196>: add x0, x0, #0x494 ; "Fatal error"
0x1957e5fb4 <+200>: adrp x3, 1047
0x1957e5fb8 <+204>: add x3, x3, #0x750;"Unexpectedly found nil while
unwrapping an Optional value"
సૹ
ذ
ܭࢉ
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ൃల
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ൃల
37
ॻ੶ൢചதʂ
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Thank you !!