交叉编译器疑问

蜡烛 · 发表于 2016-6-4 20:49:35

在工具目录下有两个交叉编译工具
arago-2011.09-armv5te-linux-gnueabi-sdk
arm-2009q1-203-arm-none-linux-gnueabi-i686-pc-linux-gnu
这两个交叉编译工具有什么区别

Jackindata · 发表于 2016-6-8 17:03:19

arago 对 TI 的支持应该更好
http://arago-project.org/wiki/index.php/Main_Page

tenny · 发表于 2016-6-8 16:07:59

有区别的，具体的说不上。推荐使用 arago

蜡烛 · 发表于 2016-6-8 22:54:03

Jackindata 发表于 2016-6-8 17:03; b9 P% L$ ~2 _, {* [& ~- n) v: P, O
arago 对 TI 的支持应该更好
/ x% b( }* ~; ^http://arago-project.org/wiki/index.php/Main_Page

的确文章里说支持和更新都优先支持 arago ，在实际编译出来输出文件不知道有没有什么优化。

蜡烛 · 发表于 2016-6-9 23:03:48

源码：
  1 #include<stdio.h>
  2 #include<math.h>
  3 int main(int argc,char* argv[])
  4 {
  5    int a,b,c;
  6    c = a * b;
  7    return 0;
  8 }

下面是两个编译器编译出来的差异  差异好像不是很大  arm汇编不是很熟悉大家看看
none:
000082e0 <_init>:
82e0: e92d4010 push {r4, lr}
82e4: eb00001c bl 835c <call_gmon_start>
82e8: e8bd8010 pop {r4, pc}
arago:
00008250 <_init>:
8250: e92d4008 push {r3, lr}
8254: eb00001d bl 82d0 <call_gmon_start>
8258: e8bd8008 pop {r3, pc}

none:
000082ec <.plt>:
82ec: e52de004 push {lr} ; (str lr, [sp, #-4]!)
82f0: e59fe004 ldr lr, [pc, #4] ; 82fc <_init+0x1c>
82f4: e08fe00e add lr, pc, lr
82f8: e5bef008 ldr pc, [lr, #8]!
82fc: 000082d4 .word 0x000082d4
8300: e28fc600 add ip, pc, #0 ; 0x0
8304: e28cca08 add ip, ip, #32768 ; 0x8000
8308: e5bcf2d4 ldr pc, [ip, #724]!
830c: e28fc600 add ip, pc, #0 ; 0x0
8310: e28cca08 add ip, ip, #32768 ; 0x8000
8314: e5bcf2cc ldr pc, [ip, #716]!
8318: e28fc600 add ip, pc, #0 ; 0x0
831c: e28cca08 add ip, ip, #32768 ; 0x8000
8320: e5bcf2c4 ldr pc, [ip, #708]!
arago:
0000825c <.plt>:
825c: e52de004 push {lr} ; (str lr, [sp, #-4]!)
8260: e59fe004 ldr lr, [pc, #4] ; 826c <_init+0x1c>
8264: e08fe00e add lr, pc, lr
8268: e5bef008 ldr pc, [lr, #8]!
826c: 0000827c .word 0x0000827c
8270: e28fc600 add ip, pc, #0
8274: e28cca08 add ip, ip, #32768 ; 0x8000
8278: e5bcf27c ldr pc, [ip, #636]! ; 0x27c
827c: e28fc600 add ip, pc, #0
8280: e28cca08 add ip, ip, #32768 ; 0x8000
8284: e5bcf274 ldr pc, [ip, #628]! ; 0x274
8288: e28fc600 add ip, pc, #0
828c: e28cca08 add ip, ip, #32768 ; 0x8000
8290: e5bcf26c ldr pc, [ip, #620]! ; 0x26c
none:
00008324 <_start>:
8324: e59fc024 ldr ip, [pc, #36] ; 8350 <_start+0x2c>
8328: e3a0b000 mov fp, #0 ; 0x0
832c: e49d1004 pop {r1} ; (ldr r1, [sp], #4)
8330: e1a0200d mov r2, sp
8334: e52d2004 push {r2} ; (str r2, [sp, #-4]!)
8338: e52d0004 push {r0} ; (str r0, [sp, #-4]!)
833c: e59f0010 ldr r0, [pc, #16] ; 8354 <_start+0x30>
8340: e59f3010 ldr r3, [pc, #16] ; 8358 <_start+0x34>
8344: e52dc004 push {ip} ; (str ip, [sp, #-4]!)
8348: ebffffef bl 830c <_init+0x2c>
834c: ebffffeb bl 8300 <_init+0x20>
8350: 00008404 .word 0x00008404
8354: 000083cc .word 0x000083cc
8358: 00008408 .word 0x00008408
arago:
00008294 <_start>:
8294: e3a0b000 mov fp, #0
8298: e3a0e000 mov lr, #0
829c: e49d1004 pop {r1} ; (ldr r1, [sp], #4)
82a0: e1a0200d mov r2, sp
82a4: e52d2004 push {r2} ; (str r2, [sp, #-4]!)
82a8: e52d0004 push {r0} ; (str r0, [sp, #-4]!)
82ac: e59fc010 ldr ip, [pc, #16] ; 82c4 <_start+0x30>
82b0: e52dc004 push {ip} ; (str ip, [sp, #-4]!)
82b4: e59f000c ldr r0, [pc, #12] ; 82c8 <_start+0x34>
82b8: e59f300c ldr r3, [pc, #12] ; 82cc <_start+0x38>
82bc: ebffffee bl 827c <_init+0x2c>
82c0: ebffffea bl 8270 <_init+0x20>
82c4: 000083dc .word 0x000083dc
82c8: 00008344 .word 0x00008344
82cc: 0000837c .word 0x0000837c
none:
0000835c <call_gmon_start>:
835c: e59f3014 ldr r3, [pc, #20] ; 8378 <call_gmon_start+0x1c>
8360: e59f2014 ldr r2, [pc, #20] ; 837c <call_gmon_start+0x20>
8364: e08f3003 add r3, pc, r3
8368: e7931002 ldr r1, [r3, r2]
836c: e3510000 cmp r1, #0 ; 0x0
8370: 012fff1e bxeq lr
8374: eaffffe7 b 8318 <_init+0x38>
8378: 00008264 .word 0x00008264
837c: 00000018 .word 0x00000018
arago:
000082d0 <call_gmon_start>:
82d0: e59f3014 ldr r3, [pc, #20] ; 82ec <call_gmon_start+0x1c>
82d4: e59f0014 ldr r0, [pc, #20] ; 82f0 <call_gmon_start+0x20>
82d8: e08f3003 add r3, pc, r3
82dc: e7932000 ldr r2, [r3, r0]
82e0: e3520000 cmp r2, #0
82e4: 012fff1e bxeq lr
82e8: eaffffe6 b 8288 <_init+0x38>
82ec: 00008208 .word 0x00008208
82f0: 00000018 .word 0x00000018
none:
00008380 <__do_global_dtors_aux>:
8380: e59f2010 ldr r2, [pc, #16] ; 8398 <__do_global_dtors_aux+0x18>
8384: e5d23000 ldrb r3, [r2]
8388: e3530000 cmp r3, #0 ; 0x0
838c: 03a03001 moveq r3, #1 ; 0x1
8390: 05c23000 strbeq r3, [r2]
8394: e12fff1e bx lr
8398: 000105f4 .word 0x000105f4
arago:
000082f4 <__do_global_dtors_aux>:
82f4: e59f3010 ldr r3, [pc, #16] ; 830c <__do_global_dtors_aux+0x18>
82f8: e5d32000 ldrb r2, [r3]
82fc: e3520000 cmp r2, #0
8300: 02822001 addeq r2, r2, #1
8304: 05c32000 strbeq r2, [r3]
8308: e12fff1e bx lr
830c: 0001050c .word 0x0001050c
none:
0000839c <frame_dummy>:
839c: e59f0020 ldr r0, [pc, #32] ; 83c4 <frame_dummy+0x28>
83a0: e92d4010 push {r4, lr}
83a4: e5903000 ldr r3, [r0]
83a8: e3530000 cmp r3, #0 ; 0x0
83ac: 08bd8010 popeq {r4, pc}
83b0: e59f3010 ldr r3, [pc, #16] ; 83c8 <frame_dummy+0x2c>
83b4: e3530000 cmp r3, #0 ; 0x0
83b8: 08bd8010 popeq {r4, pc}
83bc: e12fff33 blx r3
83c0: e8bd8010 pop {r4, pc}
83c4: 000104dc .word 0x000104dc
83c8: 00000000 .word 0x00000000
arago:
00008310 <frame_dummy>:
8310: e59f0024 ldr r0, [pc, #36] ; 833c <frame_dummy+0x2c>
8314: e92d4008 push {r3, lr}
8318: e5903000 ldr r3, [r0]
831c: e3530000 cmp r3, #0
8320: 0a000003 beq 8334 <frame_dummy+0x24>
8324: e59f3014 ldr r3, [pc, #20] ; 8340 <frame_dummy+0x30>
8328: e3530000 cmp r3, #0
832c: 11a0e00f movne lr, pc
8330: 112fff13 bxne r3
8334: e8bd4008 pop {r3, lr}
8338: e12fff1e bx lr
833c: 000103fc .word 0x000103fc
8340: 00000000 .word 0x00000000
none:
000083cc <main>:
83cc: e52db004 push {fp} ; (str fp, [sp, #-4]!)
83d0: e28db000 add fp, sp, #0 ; 0x0
83d4: e24dd01c sub sp, sp, #28 ; 0x1c
83d8: e50b0018 str r0, [fp, #-24]
83dc: e50b101c str r1, [fp, #-28]
83e0: e51b2010 ldr r2, [fp, #-16]
83e4: e51b300c ldr r3, [fp, #-12]
83e8: e0030392 mul r3, r2, r3
83ec: e50b3008 str r3, [fp, #-8]
83f0: e3a03000 mov r3, #0 ; 0x0
83f4: e1a00003 mov r0, r3
83f8: e28bd000 add sp, fp, #0 ; 0x0
83fc: e8bd0800 pop {fp}
8400: e12fff1e bx lr
arago:
00008344 <main>:
8344: e52db004 push {fp} ; (str fp, [sp, #-4]!)
8348: e28db000 add fp, sp, #0
834c: e24dd01c sub sp, sp, #28
8350: e50b0018 str r0, [fp, #-24]
8354: e50b101c str r1, [fp, #-28]
8358: e51b3008 ldr r3, [fp, #-8]
835c: e51b200c ldr r2, [fp, #-12]
8360: e0030392 mul r3, r2, r3
8364: e50b3010 str r3, [fp, #-16]
8368: e3a03000 mov r3, #0
836c: e1a00003 mov r0, r3
8370: e28bd000 add sp, fp, #0
8374: e8bd0800 pop {fp}
8378: e12fff1e bx lr
none:
00008404 <__libc_csu_fini>:
8404: e12fff1e bx lr
arago:
000083dc <__libc_csu_fini>:
83dc: e12fff1e bx lr
none:
00008408 <__libc_csu_init>:
8408: e92d47f0 push {r4, r5, r6, r7, r8, r9, sl, lr}
840c: e1a08001 mov r8, r1
8410: e1a07002 mov r7, r2
8414: e1a0a000 mov sl, r0
8418: ebffffb0 bl 82e0 <_init>
841c: e59f1044 ldr r1, [pc, #68] ; 8468 <__libc_csu_init+0x60>
8420: e59f3044 ldr r3, [pc, #68] ; 846c <__libc_csu_init+0x64>
8424: e59f2044 ldr r2, [pc, #68] ; 8470 <__libc_csu_init+0x68>
8428: e0613003 rsb r3, r1, r3
842c: e08f2002 add r2, pc, r2
8430: e1b05143 asrs r5, r3, #2
8434: e0822001 add r2, r2, r1
8438: 08bd87f0 popeq {r4, r5, r6, r7, r8, r9, sl, pc}
843c: e1a06002 mov r6, r2
8440: e3a04000 mov r4, #0 ; 0x0
8444: e1a0000a mov r0, sl
8448: e1a01008 mov r1, r8
844c: e1a02007 mov r2, r7
8450: e1a0e00f mov lr, pc
8454: e796f104 ldr pc, [r6, r4, lsl #2]
8458: e2844001 add r4, r4, #1 ; 0x1
845c: e1540005 cmp r4, r5
8460: 3afffff7 bcc 8444 <__libc_csu_init+0x3c>
8464: e8bd87f0 pop {r4, r5, r6, r7, r8, r9, sl, pc}
8468: ffffff04 .word 0xffffff04
846c: ffffff08 .word 0xffffff08
8470: 0000819c .word 0x0000819c
arago:
0000837c <__libc_csu_init>:
837c: e92d45f8 push {r3, r4, r5, r6, r7, r8, sl, lr}
8380: e59fa04c ldr sl, [pc, #76] ; 83d4 <__libc_csu_init+0x58>
8384: e1a06000 mov r6, r0
8388: e1a07001 mov r7, r1
838c: e1a08002 mov r8, r2
8390: ebffffae bl 8250 <_init>
8394: e59f103c ldr r1, [pc, #60] ; 83d8 <__libc_csu_init+0x5c>
8398: e08fa00a add sl, pc, sl
839c: e08f0001 add r0, pc, r1
83a0: e06a5000 rsb r5, sl, r0
83a4: e1b05145 asrs r5, r5, #2
83a8: 08bd85f8 popeq {r3, r4, r5, r6, r7, r8, sl, pc}
83ac: e3a04000 mov r4, #0
83b0: e79a3104 ldr r3, [sl, r4, lsl #2]
83b4: e1a00006 mov r0, r6
83b8: e1a01007 mov r1, r7
83bc: e1a02008 mov r2, r8
83c0: e2844001 add r4, r4, #1
83c4: e12fff33 blx r3
83c8: e1540005 cmp r4, r5
83cc: 3afffff7 bcc 83b0 <__libc_csu_init+0x34>
83d0: e8bd85f8 pop {r3, r4, r5, r6, r7, r8, sl, pc}
83d4: 00008054 .word 0x00008054
83d8: 00008054 .word 0x00008054
none:
Disassembly of section .fini:

00008474 <_fini>:
8474: e92d4010 push {r4, lr}
8478: e8bd8010 pop {r4, pc}
arago:
Disassembly of section .fini:

000083e0 <_fini>:
83e0: e92d4008 push {r3, lr}
83e4: e8bd8008 pop {r3, pc}

Jackindata · 发表于 2016-6-21 16:35:00

粗看是使用的寄存器有点不同。
我觉得这个基本程序代码的汇编差异不会有什么结果上的影响。
关键可能在于对于 TI 本身提供的一些特性，arago 针对其进行优化，这类的影响才会比较大吧。

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交叉编译器 疑问

交叉编译器疑问