FBI GPS定位系统

作者 : 玄天 本文共7646个字,预计阅读时间需要20分钟 发布时间: 2021-03-18

ARM Assembly

.text

.global connect
connect:
    mov     r3, #2              ; s->sin_family = AF_INET
    strh    r3, [sp]
    ldr     r3, =server_port    ; s->sin_port = server_port
    ldr     r3, [r3]
    strh    r3, [sp, #2]
    ldr     r3, =server_addr    ; s->sin_addr = server_addr
    ldr     r3, [r3]
    str     r3, [sp, #4]
    mov     r3, #0              ; bzero(&s->sin_zero)
    str     r3, [sp, #8]
    str     r3, [sp, #12]
    mov     r1, sp      ; const struct sockaddr *addr = sp

    ldr     r7, =connect_call
    ldr     r7, [r7]
    swi     #0

    add     sp, sp, #16
    pop     {r0}        ; pop sockfd

    pop     {r7}
    pop     {fp, ip, lr}
    mov     sp, ip
    bx      lr

.data
socket_call:   .long 281
connect_call:  .long 283

/* all addresses are network byte-order (big-endian) */
server_addr:            .long 0x0100007f ; localhost
server_port:            .hword 0x0b1a

AVR Assembler

;* Title:       Block Copy Routines
;* Version:     1.1

.include "8515def.inc"

        rjmp    RESET       ;reset handle

.def    flashsize=r16       ;size of block to be copied

flash2ram:
        lpm                 ;get constant
        st      Y+,r0       ;store in SRAM and increment Y-pointer
        adiw    ZL,1        ;increment Z-pointer
        dec     flashsize
        brne    flash2ram   ;if not end of table, loop more
        ret

.def    ramtemp =r1         ;temporary storage register
.def    ramsize =r16        ;size of block to be copied

LLVM IR

; ModuleID = 'test.c'
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%struct._IO_FILE = type { i32, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, %struct._IO_marker*, %struct._IO_FILE*, i32, i32, i64, i16, i8, [1 x i8], i8*, i64, i8*, i8*, i8*, i8*, i64, i32, [20 x i8] }
%struct._IO_marker = type { %struct._IO_marker*, %struct._IO_FILE*, i32 }
%struct.what = type { i8, i16 }

@.str = private unnamed_addr constant [6 x i8] c"foo()\00", align 1
@e_long = common global i64 0, align 8
@g_double = common global double 0.000000e+00, align 8
@.str.1 = private unnamed_addr constant [7 x i8] c"oooooh\00", align 1
@func_ptr = common global i32 (...)* null, align 8
@.str.2 = private unnamed_addr constant [8 x i8] c"success\00", align 1
@.str.3 = private unnamed_addr constant [9 x i8] c"FizzBuzz\00", align 1
@.str.4 = private unnamed_addr constant [5 x i8] c"Fizz\00", align 1
@.str.5 = private unnamed_addr constant [5 x i8] c"Buzz\00", align 1
@.str.6 = private unnamed_addr constant [4 x i8] c"%zd\00", align 1
@.str.7 = private unnamed_addr constant [2 x i8] c"\0A\00", align 1
@.str.8 = private unnamed_addr constant [12 x i8] c"%d, %c, %d\0A\00", align 1
@.str.9 = private unnamed_addr constant [11 x i8] c"need args!\00", align 1
@stderr = external global %struct._IO_FILE*, align 8

; Function Attrs: nounwind uwtable
define i32 @foo() #0 {
  %1 = call i32 @puts(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i32 0, i32 0))
  ret i32 0
}

declare i32 @puts(i8*) #1

; Function Attrs: nounwind uwtable
define i32 @main(i32 %argc, i8** %argv) #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i8**, align 8
  %b_char = alloca i8, align 1
  %d_int = alloca i32, align 4
  %cp_char_ptr = alloca i8*, align 8
  %X = alloca %struct.what, align 2
  %i = alloca i64, align 8
  store i32 0, i32* %1, align 4
  store i32 %argc, i32* %2, align 4
  store i8** %argv, i8*** %3, align 8
  %4 = load i8**, i8*** %3, align 8
  %5 = load i32, i32* %2, align 4
  %6 = icmp eq i32 %5, 1
  br i1 %6, label %7, label %11

; <label>:7                                       ; preds = %0
  %8 = getelementptr inbounds %struct.what, %struct.what* %X, i32 0, i32 0
  store i8 1, i8* %8, align 2
  store i8 49, i8* %b_char, align 1
  %9 = getelementptr inbounds %struct.what, %struct.what* %X, i32 0, i32 1
  store i16 128, i16* %9, align 2
  store i32 65536, i32* %d_int, align 4
  store i64 2147483648, i64* @e_long, align 8
  store double 1.000000e+01, double* @g_double, align 8
  store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i32 0, i32 0), i8** %cp_char_ptr, align 8
  store i32 (...)* bitcast (i32 ()* @foo to i32 (...)*), i32 (...)** @func_ptr, align 8
  %10 = call i32 @puts(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.2, i32 0, i32 0))
  store i32 10, i32* %1, align 4
  br label %66

; <label>:11                                      ; preds = %0
  %12 = load i32, i32* %2, align 4
  %13 = icmp eq i32 %12, 2
  br i1 %13, label %14, label %63

; <label>:14                                      ; preds = %11
  store i64 0, i64* %i, align 8
  br label %15

; <label>:15                                      ; preds = %43, %14
  %16 = load i64, i64* %i, align 8
  %17 = icmp ult i64 %16, 100
  br i1 %17, label %18, label %46

; <label>:18                                      ; preds = %15
  %19 = load i64, i64* %i, align 8
  %20 = urem i64 %19, 15
  %21 = icmp ne i64 %20, 0
  br i1 %21, label %24, label %22

; <label>:22                                      ; preds = %18
  %23 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.3, i32 0, i32 0))
  br label %41

; <label>:24                                      ; preds = %18
  %25 = load i64, i64* %i, align 8
  %26 = urem i64 %25, 3
  %27 = icmp ne i64 %26, 0
  br i1 %27, label %30, label %28

; <label>:28                                      ; preds = %24
  %29 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.4, i32 0, i32 0))
  br label %40

; <label>:30                                      ; preds = %24
  %31 = load i64, i64* %i, align 8
  %32 = urem i64 %31, 5
  %33 = icmp ne i64 %32, 0
  br i1 %33, label %36, label %34

; <label>:34                                      ; preds = %30
  %35 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.5, i32 0, i32 0))
  br label %39

; <label>:36                                      ; preds = %30
  %37 = load i64, i64* %i, align 8
  %38 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.6, i32 0, i32 0), i64 %37)
  br label %39

; <label>:39                                      ; preds = %36, %34
  br label %40

; <label>:40                                      ; preds = %39, %28
  br label %41

; <label>:41                                      ; preds = %40, %22
  %42 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.7, i32 0, i32 0))
  br label %43

; <label>:43                                      ; preds = %41
  %44 = load i64, i64* %i, align 8
  %45 = add i64 %44, 1
  store i64 %45, i64* %i, align 8
  br label %15

; <label>:46                                      ; preds = %15
  %47 = getelementptr inbounds %struct.what, %struct.what* %X, i32 0, i32 0
  store i8 1, i8* %47, align 2
  store i8 49, i8* %b_char, align 1
  %48 = getelementptr inbounds %struct.what, %struct.what* %X, i32 0, i32 1
  store i16 128, i16* %48, align 2
  store i32 65536, i32* %d_int, align 4
  store i64 2147483648, i64* @e_long, align 8
  store double 1.000000e+01, double* @g_double, align 8
  store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i32 0, i32 0), i8** %cp_char_ptr, align 8
  store i32 (...)* bitcast (i32 ()* @foo to i32 (...)*), i32 (...)** @func_ptr, align 8
  %49 = getelementptr inbounds %struct.what, %struct.what* %X, i32 0, i32 0
  %50 = load i8, i8* %49, align 2
  %51 = trunc i8 %50 to i1
  %52 = zext i1 %51 to i32
  %53 = load i8, i8* %b_char, align 1
  %54 = sext i8 %53 to i32
  %55 = getelementptr inbounds %struct.what, %struct.what* %X, i32 0, i32 1
  %56 = load i16, i16* %55, align 2
  %57 = sext i16 %56 to i32
  %58 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.8, i32 0, i32 0), i32 %52, i32 %54, i32 %57)
  %59 = getelementptr inbounds %struct.what, %struct.what* %X, i32 0, i32 0
  %60 = load i8, i8* %59, align 2
  %61 = trunc i8 %60 to i1
  %62 = zext i1 %61 to i32
  store i32 %62, i32* %1, align 4
  br label %66

; <label>:63                                      ; preds = %11
  %64 = load %struct._IO_FILE*, %struct._IO_FILE** @stderr, align 8
  %65 = call i32 @fputs(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.9, i32 0, i32 0), %struct._IO_FILE* %64)
  store i32 -1, i32* %1, align 4
  br label %66

; <label>:66                                      ; preds = %63, %46, %7
  %67 = load i32, i32* %1, align 4
  ret i32 %67
}

declare i32 @printf(i8*, ...) #1

declare i32 @fputs(i8*, %struct._IO_FILE*) #1

attributes #0 = { nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }

!llvm.ident = !{!0}

!0 = !{!"clang version 3.8.0 (tags/RELEASE_380/final)"}

MIPS Assembly

.text
.global AckermannFunc

# Preconditions:
#   1st parameter ($a0) m
#   2nd parameter ($a1) n
# Postconditions:
#   result in ($v0) = value of A(m,n)

AckermannFunc:
            addi    $sp,   $sp, -8
            sw      $s0, 4($sp)
            sw      $ra, 0($sp)

            # move the parameter registers to temporary  - no, only when nec.

LABEL_IF:   bne     $a0, $zero, LABEL_ELSE_IF

            addi    $v0, $a1, 1

            # jump to LABEL_DONE
            j LABEL_DONE

Intel x86 Assembly

section .text
extern  _MessageBoxA@16
%if     __NASM_VERSION_ID__ >= 0x02030000
safeseh handler         ; register handler as "safe handler"
%endif

handler:
        push    dword 1 ; MB_OKCANCEL
        push    dword caption
        push    dword text
        push    dword 0
        call    _MessageBoxA@16
        sub     eax,1   ; incidentally suits as return value
                        ; for exception handler
        ret

global  _main
_main:  push    dword handler
        push    dword [fs:0]
        mov     dword [fs:0], esp
        xor     eax,eax
        mov     eax, dword[eax]   ; cause exception
        pop     dword [fs:0]      ; disengage exception handler
        add     esp, 4
        ret

avx2:   vzeroupper
        push      rbx
        mov       rbx,   rsp
        sub       rsp,   0h20
        vmovdqa   ymm0,  [rcx]
        vpaddb    ymm0,  [rdx]
        leave
        ret

text:   db      'OK to rethrow, CANCEL to generate core dump',0
caption:db      'SEGV',0

section .drectve info
        db      '/defaultlib:user32.lib /defaultlib:msvcrt.lib '

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