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在Cortex-M4上编译和运行ARM汇编二进制文件（在QEMU中模拟）

arm

在Cortex-M4上编译和运行ARM汇编二进制文件（在QEMU中模拟）,arm,qemu,cortex-m,Arm,Qemu,Cortex M,我使用以下过程在虚拟QEMU嵌入式系统connex上成功编译并执行了ARM二进制文件： arm-none-eabi-as -o program.o program.s arm-none-eabi-ld -Ttext=0x0 -o program.elf program.o arm-none-eabi-objcopy -O binary program.elf program.bin dd if=/dev/zero of=flash.bin bs=4096 count=4096 dd if=p

我使用以下过程在虚拟QEMU嵌入式系统
connex
上成功编译并执行了ARM二进制文件：

arm-none-eabi-as -o program.o program.s
arm-none-eabi-ld -Ttext=0x0 -o program.elf program.o  
arm-none-eabi-objcopy -O binary program.elf program.bin
dd if=/dev/zero of=flash.bin bs=4096 count=4096
dd if=program.bin of=flash.bin bs=4096 conv=notrunc
qemu-system-arm -M connex -pflash flash.bin -nographic -serial /dev/null
在第四行，我创建了一个调零的空磁盘，它代表闪存，在第五行，我将二进制文件复制到闪存中

这就像一个魔咒，但它模拟了整个嵌入式系统，而我只想模拟ARM核心，例如Cortex-M4。这就是为什么我尝试使用
qemu-arm
而不是
qemu-system-arm

因此，我首先尝试这样编译和运行我的程序（第1-3行与上面相同）：

这不起作用-它说：

Error while loading program.bin: Exec format error
因此，我尝试像以前一样创建flash图像（因为它工作正常）：

我明白了：

Error while loading flash.bin: Permission denied
谁能帮我一点忙吗？使用
sudo
没有帮助。

qemu arm的目的不是“只模拟arm核心”。它是“运行单个Linux二进制文件”，它希望您提供的二进制文件是Linux格式的ELF可执行文件。试图用别的东西喂它是行不通的

由于Linux采用A-profile内核，而不是M-profile内核，所以在qemu arm上使用-cpu cortex-m4所做的任何事情都只能靠运气，而不是故意。（我们不禁用这些CPU类型，因为有些GCC测试用例场景使用半托管，我们不想故意破坏这种工作方式。但这些工作方式与其他任何方式一样幸运。）

与微控制器构建相比，您需要一个入口点（以及它的ram）

开始

.thumb
.thumb_func
.global _start
_start:
    @mov r0,=0x10000
    @mov sp,r0
    bl notmain
    mov r7,#0x1
    mov r0,#0
    swi #0
.word 0xFFFFFFFF
    b .

.thumb_func
.globl PUT32
PUT32:
    str r1,[r0]
    bx lr

.thumb_func
.globl GET32
GET32:
    ldr r0,[r0]
    bx lr

.thumb_func
.globl dummy
dummy:
    bx lr

.thumb_func
.globl write
write:
    push {r7,lr}
    mov r7,#0x04
    swi 0
    pop {r7,pc}
    b .

.end

.thumb
.thumb_func
.global _start
_start:
    mov r4,#10
top:
    nop
    sub r4,#1
    bne top

    mov r7,#0x1
    mov r0,#0
    swi #0
.word 0xFFFFFFFF
    b .

.end
诺曼

void PUT32 ( unsigned int, unsigned int );
unsigned int GET32 ( unsigned int );
void dummy ( unsigned int );
void write ( unsigned int, char *, unsigned int );
int notmain ( void )
{
    //unsigned int ra;
    //for(ra=0;ra<1000;ra++) dummy(ra);
    write(1,"Hello\n",6);
    return(0);

}
建造

跑

转储日志

cat hello
CPU Reset (CPU 0)
R00=00000000 R01=00000000 R02=00000000 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00000000 R11=00000000
R12=00000000 R13=00000000 R14=00000000 R15=00000000
PSR=40000000 -Z-- A usr26
CPU Reset (CPU 0)
R00=00000000 R01=00000000 R02=00000000 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00000000 R11=00000000
R12=00000000 R13=00000000 R14=00000000 R15=00000000
PSR=40000010 -Z-- A usr32
Reserved 0xf7000000 bytes of guest address space
host mmap_min_addr=0x10000
guest_base  0x7f4347fb4000
start    end      size     prot
00010000-00011000 00001000 r-x
f67ff000-f6800000 00001000 ---
f6800000-f7000000 00800000 rw-
start_brk   0x00000000
end_code    0x00010044
start_code  0x00010000
start_data  0x00010044
end_data    0x00010044
start_stack 0xf6fff350
brk         0x00010044
entry       0x00010001
----------------
IN: 
0x00010000:  f000 f810  bl  0x10024

R00=00000000 R01=f6fff4c2 R02=00000000 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010044 R11=00000000
R12=00000000 R13=f6fff350 R14=00000000 R15=00010000
PSR=00000030 ---- T usr32
----------------
IN: notmain
0x00010024:  b508       push    {r3, lr}
0x00010026:  2001       movs    r0, #1
0x00010028:  4903       ldr r1, [pc, #12]   (0x10038)
0x0001002a:  2206       movs    r2, #6
0x0001002c:  f7ff fff5  bl  0x1001a

R00=00000000 R01=f6fff4c2 R02=00000000 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010044 R11=00000000
R12=00000000 R13=f6fff350 R14=00010005 R15=00010024
PSR=00000030 ---- T usr32
----------------
IN: 
0x0001001a:  b580       push    {r7, lr}
0x0001001c:  2704       movs    r7, #4
0x0001001e:  df00       svc 0

R00=00000001 R01=0001003c R02=00000006 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010044 R11=00000000
R12=00000000 R13=f6fff348 R14=00010031 R15=0001001a
PSR=00000030 ---- T usr32
----------------
IN: 
0x00010020:  bd80       pop {r7, pc}

R00=00000006 R01=0001003c R02=00000006 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000004
R08=00000000 R09=00000000 R10=00010044 R11=00000000
R12=00000000 R13=f6fff340 R14=00010031 R15=00010020
PSR=00000030 ---- T usr32
----------------
IN: notmain
0x00010030:  2000       movs    r0, #0
0x00010032:  bc08       pop {r3}
0x00010034:  bc02       pop {r1}
0x00010036:  4708       bx  r1

R00=00000006 R01=0001003c R02=00000006 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010044 R11=00000000
R12=00000000 R13=f6fff348 R14=00010031 R15=00010030
PSR=00000030 ---- T usr32
----------------
IN: 
0x00010004:  2701       movs    r7, #1
0x00010006:  2000       movs    r0, #0
0x00010008:  df00       svc 0

R00=00000000 R01=00010005 R02=00000006 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010044 R11=00000000
R12=00000000 R13=f6fff350 R14=00010031 R15=00010004
PSR=40000030 -Z-- T usr32

cat hello
CPU Reset (CPU 0)
R00=00000000 R01=00000000 R02=00000000 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00000000 R11=00000000
R12=00000000 R13=00000000 R14=00000000 R15=00000000
PSR=40000000 -Z-- A usr26
CPU Reset (CPU 0)
R00=00000000 R01=00000000 R02=00000000 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00000000 R11=00000000
R12=00000000 R13=00000000 R14=00000000 R15=00000000
PSR=40000010 -Z-- A usr32
Reserved 0xf7000000 bytes of guest address space
host mmap_min_addr=0x10000
guest_base  0x7f36110fc000
start    end      size     prot
00010000-00011000 00001000 r-x
f67ff000-f6800000 00001000 ---
f6800000-f7000000 00800000 rw-
start_brk   0x00000000
end_code    0x00010014
start_code  0x00010000
start_data  0x00010014
end_data    0x00010014
start_stack 0xf6fff350
brk         0x00010014
entry       0x00010001
----------------
IN: 
0x00010000:  240a       movs    r4, #10
0x00010002:  46c0       nop         (mov r8, r8)
0x00010004:  3c01       subs    r4, #1
0x00010006:  d1fc       bne.n   0x10002

R00=00000000 R01=f6fff4c2 R02=00000000 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010014 R11=00000000
R12=00000000 R13=f6fff350 R14=00000000 R15=00010000
PSR=00000030 ---- T usr32
----------------
IN: 
0x00010002:  46c0       nop         (mov r8, r8)
0x00010004:  3c01       subs    r4, #1
0x00010006:  d1fc       bne.n   0x10002

R00=00000000 R01=f6fff4c2 R02=00000000 R03=00000000
R04=00000009 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010014 R11=00000000
R12=00000000 R13=f6fff350 R14=00000000 R15=00010002
PSR=20000030 --C- T usr32
R00=00000000 R01=f6fff4c2 R02=00000000 R03=00000000
R04=00000008 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010014 R11=00000000
R12=00000000 R13=f6fff350 R14=00000000 R15=00010002
PSR=20000030 --C- T usr32
----------------
IN: 
0x00010008:  2701       movs    r7, #1
0x0001000a:  2000       movs    r0, #0
0x0001000c:  df00       svc 0

R00=00000000 R01=f6fff4c2 R02=00000000 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010014 R11=00000000
R12=00000000 R13=f6fff350 R14=00000000 R15=00010008
PSR=60000030 -ZC- T usr32
如果你触摸堆栈指针，它会不高兴，所以不要

谢谢你指出这个节目，我不知道，我会玩得很开心

编辑

对不起，你只是想参加集会

开始

.thumb
.thumb_func
.global _start
_start:
    @mov r0,=0x10000
    @mov sp,r0
    bl notmain
    mov r7,#0x1
    mov r0,#0
    swi #0
.word 0xFFFFFFFF
    b .

.thumb_func
.globl PUT32
PUT32:
    str r1,[r0]
    bx lr

.thumb_func
.globl GET32
GET32:
    ldr r0,[r0]
    bx lr

.thumb_func
.globl dummy
dummy:
    bx lr

.thumb_func
.globl write
write:
    push {r7,lr}
    mov r7,#0x04
    swi 0
    pop {r7,pc}
    b .

.end

.thumb
.thumb_func
.global _start
_start:
    mov r4,#10
top:
    nop
    sub r4,#1
    bne top

    mov r7,#0x1
    mov r0,#0
    swi #0
.word 0xFFFFFFFF
    b .

.end
上面的链接器脚本

建造

跑

转储日志

cat hello
CPU Reset (CPU 0)
R00=00000000 R01=00000000 R02=00000000 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00000000 R11=00000000
R12=00000000 R13=00000000 R14=00000000 R15=00000000
PSR=40000000 -Z-- A usr26
CPU Reset (CPU 0)
R00=00000000 R01=00000000 R02=00000000 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00000000 R11=00000000
R12=00000000 R13=00000000 R14=00000000 R15=00000000
PSR=40000010 -Z-- A usr32
Reserved 0xf7000000 bytes of guest address space
host mmap_min_addr=0x10000
guest_base  0x7f4347fb4000
start    end      size     prot
00010000-00011000 00001000 r-x
f67ff000-f6800000 00001000 ---
f6800000-f7000000 00800000 rw-
start_brk   0x00000000
end_code    0x00010044
start_code  0x00010000
start_data  0x00010044
end_data    0x00010044
start_stack 0xf6fff350
brk         0x00010044
entry       0x00010001
----------------
IN: 
0x00010000:  f000 f810  bl  0x10024

R00=00000000 R01=f6fff4c2 R02=00000000 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010044 R11=00000000
R12=00000000 R13=f6fff350 R14=00000000 R15=00010000
PSR=00000030 ---- T usr32
----------------
IN: notmain
0x00010024:  b508       push    {r3, lr}
0x00010026:  2001       movs    r0, #1
0x00010028:  4903       ldr r1, [pc, #12]   (0x10038)
0x0001002a:  2206       movs    r2, #6
0x0001002c:  f7ff fff5  bl  0x1001a

R00=00000000 R01=f6fff4c2 R02=00000000 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010044 R11=00000000
R12=00000000 R13=f6fff350 R14=00010005 R15=00010024
PSR=00000030 ---- T usr32
----------------
IN: 
0x0001001a:  b580       push    {r7, lr}
0x0001001c:  2704       movs    r7, #4
0x0001001e:  df00       svc 0

R00=00000001 R01=0001003c R02=00000006 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010044 R11=00000000
R12=00000000 R13=f6fff348 R14=00010031 R15=0001001a
PSR=00000030 ---- T usr32
----------------
IN: 
0x00010020:  bd80       pop {r7, pc}

R00=00000006 R01=0001003c R02=00000006 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000004
R08=00000000 R09=00000000 R10=00010044 R11=00000000
R12=00000000 R13=f6fff340 R14=00010031 R15=00010020
PSR=00000030 ---- T usr32
----------------
IN: notmain
0x00010030:  2000       movs    r0, #0
0x00010032:  bc08       pop {r3}
0x00010034:  bc02       pop {r1}
0x00010036:  4708       bx  r1

R00=00000006 R01=0001003c R02=00000006 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010044 R11=00000000
R12=00000000 R13=f6fff348 R14=00010031 R15=00010030
PSR=00000030 ---- T usr32
----------------
IN: 
0x00010004:  2701       movs    r7, #1
0x00010006:  2000       movs    r0, #0
0x00010008:  df00       svc 0

R00=00000000 R01=00010005 R02=00000006 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010044 R11=00000000
R12=00000000 R13=f6fff350 R14=00010031 R15=00010004
PSR=40000030 -Z-- T usr32

cat hello
CPU Reset (CPU 0)
R00=00000000 R01=00000000 R02=00000000 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00000000 R11=00000000
R12=00000000 R13=00000000 R14=00000000 R15=00000000
PSR=40000000 -Z-- A usr26
CPU Reset (CPU 0)
R00=00000000 R01=00000000 R02=00000000 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00000000 R11=00000000
R12=00000000 R13=00000000 R14=00000000 R15=00000000
PSR=40000010 -Z-- A usr32
Reserved 0xf7000000 bytes of guest address space
host mmap_min_addr=0x10000
guest_base  0x7f36110fc000
start    end      size     prot
00010000-00011000 00001000 r-x
f67ff000-f6800000 00001000 ---
f6800000-f7000000 00800000 rw-
start_brk   0x00000000
end_code    0x00010014
start_code  0x00010000
start_data  0x00010014
end_data    0x00010014
start_stack 0xf6fff350
brk         0x00010014
entry       0x00010001
----------------
IN: 
0x00010000:  240a       movs    r4, #10
0x00010002:  46c0       nop         (mov r8, r8)
0x00010004:  3c01       subs    r4, #1
0x00010006:  d1fc       bne.n   0x10002

R00=00000000 R01=f6fff4c2 R02=00000000 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010014 R11=00000000
R12=00000000 R13=f6fff350 R14=00000000 R15=00010000
PSR=00000030 ---- T usr32
----------------
IN: 
0x00010002:  46c0       nop         (mov r8, r8)
0x00010004:  3c01       subs    r4, #1
0x00010006:  d1fc       bne.n   0x10002

R00=00000000 R01=f6fff4c2 R02=00000000 R03=00000000
R04=00000009 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010014 R11=00000000
R12=00000000 R13=f6fff350 R14=00000000 R15=00010002
PSR=20000030 --C- T usr32
R00=00000000 R01=f6fff4c2 R02=00000000 R03=00000000
R04=00000008 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010014 R11=00000000
R12=00000000 R13=f6fff350 R14=00000000 R15=00010002
PSR=20000030 --C- T usr32
----------------
IN: 
0x00010008:  2701       movs    r7, #1
0x0001000a:  2000       movs    r0, #0
0x0001000c:  df00       svc 0

R00=00000000 R01=f6fff4c2 R02=00000000 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010014 R11=00000000
R12=00000000 R13=f6fff350 R14=00000000 R15=00010008
PSR=60000030 -ZC- T usr32
如果ELF入口点具有低位清除，则qemu arm将在arm模式下启动，如果入口点具有低位设置，则在Thumb模式下启动（Thumb模式ELF文件的常用约定）。对于M profile core，如果您尝试使用未设置的CPSR.T执行任何操作，您将立即得到UsageFault（在qemu arm中，这可能会表现为试图传递SIGILL）。它实际上不会以ARM指令的形式执行任何操作，尽管调试日志反汇编程序可能仍然以ARM格式反汇编INSN。为什么qemu ARM会有一系列cortex-m内核，而qemu系统ARM却没有？两者之间是否没有连接（qemu arm是否使用与qemu系统arm不同的代码/内核）？qemu系统arm支持同一组CPU，包括cortex-m3和cortex-m4。如果您的qemu系统arm没有列出cortex-m3，那么它一定是一个非常旧的版本（已经过时十年或更长时间了）。或者它可能是一个特定于发行版的特殊版本，禁用了很多代码——我认为RedHat有一个用于运行ARM虚拟机的版本，其中大多数仅用于仿真的内核都被禁用，以最大限度地减少安全攻击面。截至上次我检查时，除了cortex-m3之外，没有一个系统使用cortex-m4或其他任何（M）版本，正如所指出的……有一种叉子利用了它们，是的。qemu中的皮质m3只是最近才被修复为不会断裂，所以即使它是在tiva c被称为stellaris时添加的，并且是在德克萨斯仪器公司将其关联之前由luminary micro公司提供的。事实上，他们是第一个拥有m3硅（用于大规模消费）的公司，qemu后端也走了这么远，但问题已经存在这么久了。谁知道如果不尝试m4等，qemu目标也可能有问题，直到有人去尝试它们。是的，我们有m4 CPU支持，但m4还没有板模型。将-cpu cortex-m4传递给stellaris的某个板可能会产生类似于弗兰肯斯坦的东西。重新阅读你想要的标题汇编，删除bl notmain和gcc部分。这是从M配置文件代码中进行Linux系统调用，而M配置文件代码只在偶然情况下才真正起作用，据我所知，这与任何真正的硬件RTO的代码都不对应。。。在我看来，您最好使用qemu系统arm和半托管（或与UART对话）。在qemu arm中，没有中断控制器，没有对任何内存映射系统寄存器的访问，没有异常处理，没有UART或定时器设备。这些对于M-profile代码都非常重要。如果你想使用cortex-m4或其他（m3除外）qemu系统arm还没有选择，那是一个更大的项目，需要编写一个系统，将它添加到qemu系统arm来玩这个模拟器。无论如何，形状或形式都不是偶然的，调用就是调用，linux并没有什么神奇之处，它只是一个指令集。我本可以不打电话，只是为了好玩才加的。OP想知道如何做到这一点，你提供了丢失的链接，就像我说的，它是偶然出现的，因为我们不想故意破坏GCC测试套件和其他用户，他们碰巧发现它为有限的目的工作。这不是一个很大的bug，因为所有应该工作的东西都工作得很好。我们只是没有像可能的那样准确地诊断用户错误。 
arm-none-eabi-as --warn --fatal-warnings start.s -o start.o
arm-none-eabi-ld -o notmain.elf -T hello.ld start.o
arm-none-eabi-objdump -D notmain.elf > notmain.list
arm-none-eabi-objcopy notmain.elf notmain.bin -O binary

qemu-arm -d in_asm,cpu,cpu_reset -D hello -cpu cortex-m4 notmain.elf 

cat hello
CPU Reset (CPU 0)
R00=00000000 R01=00000000 R02=00000000 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00000000 R11=00000000
R12=00000000 R13=00000000 R14=00000000 R15=00000000
PSR=40000000 -Z-- A usr26
CPU Reset (CPU 0)
R00=00000000 R01=00000000 R02=00000000 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00000000 R11=00000000
R12=00000000 R13=00000000 R14=00000000 R15=00000000
PSR=40000010 -Z-- A usr32
Reserved 0xf7000000 bytes of guest address space
host mmap_min_addr=0x10000
guest_base  0x7f36110fc000
start    end      size     prot
00010000-00011000 00001000 r-x
f67ff000-f6800000 00001000 ---
f6800000-f7000000 00800000 rw-
start_brk   0x00000000
end_code    0x00010014
start_code  0x00010000
start_data  0x00010014
end_data    0x00010014
start_stack 0xf6fff350
brk         0x00010014
entry       0x00010001
----------------
IN: 
0x00010000:  240a       movs    r4, #10
0x00010002:  46c0       nop         (mov r8, r8)
0x00010004:  3c01       subs    r4, #1
0x00010006:  d1fc       bne.n   0x10002

R00=00000000 R01=f6fff4c2 R02=00000000 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010014 R11=00000000
R12=00000000 R13=f6fff350 R14=00000000 R15=00010000
PSR=00000030 ---- T usr32
----------------
IN: 
0x00010002:  46c0       nop         (mov r8, r8)
0x00010004:  3c01       subs    r4, #1
0x00010006:  d1fc       bne.n   0x10002

R00=00000000 R01=f6fff4c2 R02=00000000 R03=00000000
R04=00000009 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010014 R11=00000000
R12=00000000 R13=f6fff350 R14=00000000 R15=00010002
PSR=20000030 --C- T usr32
R00=00000000 R01=f6fff4c2 R02=00000000 R03=00000000
R04=00000008 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010014 R11=00000000
R12=00000000 R13=f6fff350 R14=00000000 R15=00010002
PSR=20000030 --C- T usr32
----------------
IN: 
0x00010008:  2701       movs    r7, #1
0x0001000a:  2000       movs    r0, #0
0x0001000c:  df00       svc 0

R00=00000000 R01=f6fff4c2 R02=00000000 R03=00000000
R04=00000000 R05=00000000 R06=00000000 R07=00000000
R08=00000000 R09=00000000 R10=00010014 R11=00000000
R12=00000000 R13=f6fff350 R14=00000000 R15=00010008
PSR=60000030 -ZC- T usr32