全て。組み込み Linux で dalvikVM を実行しようとしています。qemu で実行する zynq-zc702 には xilinx-linux を使用しています。私はこのチュートリアルに従いました：
http://www.bolatdinc.com/?p=336&cpage=1
ashmem と logger を Linux カーネルに移植し、armv7-a アーキテクチャ用に dalvik をコンパイルしました。しかし、/system/bin/dalvikvm を実行すると、次の strace で segfault が発生します。
execve("/system/bin/dalvikvm", ["dalvikvm"], [/* 10 vars */]) = 0
set_tls(0xb0012c70, 0xb00144bc, 0xffffffd0, 0, 0) = 0
getpid() = 1210
getuid32() = 0
geteuid32() = 0
getgid32() = 0
getegid32() = 0
sigaction(SIGILL, {0xb0005b29, [], SA_RESTART|SA_SIGINFO}, NULL, 0) = 0
sigaction(SIGABRT, {0xb0005b29, [], SA_RESTART|SA_SIGINFO}, NULL, 0) = 0
sigaction(SIGBUS, {0xb0005b29, [], SA_RESTART|SA_SIGINFO}, NULL, 0) = 0
sigaction(SIGFPE, {0xb0005b29, [], SA_RESTART|SA_SIGINFO}, NULL, 0) = 0
sigaction(SIGSEGV, {0xb0005b29, [], SA_RESTART|SA_SIGINFO}, NULL, 0) = 0
sigaction(SIGSTKFLT, {0xb0005b29, [], SA_RESTART|SA_SIGINFO}, NULL, 0) = 0
sigaction(SIGPIPE, {0xb0005b29, [], SA_RESTART|SA_SIGINFO}, NULL, 0) = 0
stat64("/vendor/lib/libdvm.so", 0xbec3da20) = -1 ENOENT (No such file or directory)
stat64("/system/lib/libdvm.so", {st_mode=S_IFREG|0775, st_size=753884, ...}) = 0
open("/system/lib/libdvm.so", O_RDONLY|O_LARGEFILE) = 3
lseek(3, 0, SEEK_SET) = 0
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\0\0\0\0004\0\0\0"..., 4096) = 4096
lseek(3, -8, SEEK_END) = 753876
read(3, "\1\0\0\0\0\0\0\0", 8) = 8
mmap2(NULL, 765952, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6e95000
mmap2(0xb6e95000, 719912, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0xb6e95000
mprotect(0xb6e95000, 720896, PROT_READ|PROT_WRITE|PROT_EXEC) = 0
mmap2(0xb6f45000, 31748, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0xb0) = 0xb6f45000
mmap2(0xb6f4d000, 8812, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb6f4d000
close(3) = 0
stat64("/vendor/lib/liblog.so", 0xbec3d778) = -1 ENOENT (No such file or directory)
stat64("/system/lib/liblog.so", {st_mode=S_IFREG|0775, st_size=13888, ...}) = 0
open("/system/lib/liblog.so", O_RDONLY|O_LARGEFILE) = 3
lseek(3, 0, SEEK_SET) = 0
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\0\0\0\0004\0\0\0"..., 4096) = 4096
lseek(3, -8, SEEK_END) = 13880
read(3, "\1\0\0\0\0\0\0\0", 8) = 8
mmap2(NULL, 16384, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6e91000
mmap2(0xb6e91000, 10864, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0xb6e91000
mprotect(0xb6e91000, 12288, PROT_READ|PROT_WRITE|PROT_EXEC) = 0
mmap2(0xb6e94000, 412, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x3) = 0xb6e94000
close(3) = 0
stat64("/vendor/lib/libc.so", 0xbec3d4d0) = -1 ENOENT (No such file or directory)
stat64("/system/lib/libc.so", {st_mode=S_IFREG|0775, st_size=282212, ...}) = 0
open("/system/lib/libc.so", O_RDONLY|O_LARGEFILE) = 3
lseek(3, 0, SEEK_SET) = 0
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\0\0\0\0004\0\0\0"..., 4096) = 4096
lseek(3, -8, SEEK_END) = 282204
read(3, "\1\0\0\0\0\0\0\0", 8) = 8
mmap2(NULL, 327680, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6e41000
mmap2(0xb6e41000, 270012, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0xb6e41000
mprotect(0xb6e41000, 270336, PROT_READ|PROT_WRITE|PROT_EXEC) = 0
mmap2(0xb6e83000, 10100, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x42) = 0xb6e83000
mmap2(0xb6e86000, 43772, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb6e86000
close(3) = 0
mprotect(0xb6e41000, 270336, PROT_READ|PROT_EXEC) = 0
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0xc} ---
open("/dev/log/main", O_WRONLY|O_LARGEFILE) = 3
writev(3, [{"\7", 1}, {"libc\0", 5}, {"Fatal signal 11 (SIGSEGV) at 0x0"..., 49}], 3) = 55
gettid() = 1210
socket(PF_FILE, SOCK_STREAM, 0) = 4
connect(4, {sa_family=AF_FILE, sun_path=@"android:debuggerd"}, 20) = -1 ECONNREFUSED (Connection refused)
close(4) = 0
sigaction(SIGSEGV, {SIG_DFL, [], SA_RESTART}, {0xb0005b29, [], SA_RESTART|SA_SIGINFO}, 0) = 0
rt_sigreturn() = -61456
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0xc} ---
+++ killed by SIGSEGV +++
Segmentation fault
奇妙なことに、dalvik/dalvikvm/Main.cpp main(...) 関数のすべての行にコメントを付けても、 return 0; を除きます。私はまだこのセグメンテーション違反を取得します。
writev(3, [{"\7", 1}, {"libc\0", 5}, {"Fatal signal 11 (SIGSEGV) at 0x0"..., 49}], 3) = 55
ある種の libc/bionic の問題のようですが、解決方法はまだわかりません。
非常に基本的な helloworld アプリとそのための Android.mk を作成すると、Android ツリーの一部として helloworld をビルドすると、同じ segfault が発生します。arm-xilinx-linux-gnueabi-toolchain を使用して helloworld をビルドすると、問題なく動作します。これは、バイオニックではなくglibcにリンクされているためだと思います。
私はものを逆アセンブルするのが得意ではないので、helloworld と segfaulting を実行するために objdump -d の出力を添付しました。
働く：
../testapp/main_stdlib: file format elf32-littlearm
Disassembly of section .init:
0000836c <_init>:
836c: e92d4008 push {r3, lr}
8370: eb00001d bl 83ec <call_weak_fn>
8374: e8bd8008 pop {r3, pc}
Disassembly of section .plt:
00008378 <.plt>:
8378: e52de004 push {lr} ; (str lr, [sp, #-4]!)
837c: e59fe004 ldr lr, [pc, #4] ; 8388 <_init+0x1c>
8380: e08fe00e add lr, pc, lr
8384: e5bef008 ldr pc, [lr, #8]!
8388: 00008388 .word 0x00008388
838c: e28fc600 add ip, pc, #0, 12
8390: e28cca08 add ip, ip, #8, 20 ; 0x8000
8394: e5bcf388 ldr pc, [ip, #904]! ; 0x388
8398: e28fc600 add ip, pc, #0, 12
839c: e28cca08 add ip, ip, #8, 20 ; 0x8000
83a0: e5bcf380 ldr pc, [ip, #896]! ; 0x380
83a4: e28fc600 add ip, pc, #0, 12
83a8: e28cca08 add ip, ip, #8, 20 ; 0x8000
83ac: e5bcf378 ldr pc, [ip, #888]! ; 0x378
Disassembly of section .text:
000083b0 <_start>:
83b0: e3a0b000 mov fp, #0
83b4: e3a0e000 mov lr, #0
83b8: e49d1004 pop {r1} ; (ldr r1, [sp], #4)
83bc: e1a0200d mov r2, sp
83c0: e52d2004 push {r2} ; (str r2, [sp, #-4]!)
83c4: e52d0004 push {r0} ; (str r0, [sp, #-4]!)
83c8: e59fc010 ldr ip, [pc, #16] ; 83e0 <_start+0x30>
83cc: e52dc004 push {ip} ; (str ip, [sp, #-4]!)
83d0: e59f000c ldr r0, [pc, #12] ; 83e4 <_start+0x34>
83d4: e59f300c ldr r3, [pc, #12] ; 83e8 <_start+0x38>
83d8: ebffffeb bl 838c <_init+0x20>
83dc: ebfffff0 bl 83a4 <_init+0x38>
83e0: 0000857c .word 0x0000857c
83e4: 000084e4 .word 0x000084e4
83e8: 00008518 .word 0x00008518
000083ec <call_weak_fn>:
83ec: e59f3014 ldr r3, [pc, #20] ; 8408 <call_weak_fn+0x1c>
83f0: e59f2014 ldr r2, [pc, #20] ; 840c <call_weak_fn+0x20>
83f4: e08f3003 add r3, pc, r3
83f8: e7932002 ldr r2, [r3, r2]
83fc: e3520000 cmp r2, #0
8400: 012fff1e bxeq lr
8404: eaffffe3 b 8398 <_init+0x2c>
8408: 00008314 .word 0x00008314
840c: 00000018 .word 0x00000018
00008410 <deregister_tm_clones>:
8410: e92d4008 push {r3, lr}
8414: e3000734 movw r0, #1844 ; 0x734
8418: e59f3024 ldr r3, [pc, #36] ; 8444 <deregister_tm_clones+0x34>
841c: e3400001 movt r0, #1
8420: e0603003 rsb r3, r0, r3
8424: e3530006 cmp r3, #6
8428: 98bd8008 popls {r3, pc}
842c: e3003000 movw r3, #0
8430: e3403000 movt r3, #0
8434: e3530000 cmp r3, #0
8438: 08bd8008 popeq {r3, pc}
843c: e12fff33 blx r3
8440: e8bd8008 pop {r3, pc}
8444: 00010737 .word 0x00010737
00008448 <register_tm_clones>:
8448: e92d4008 push {r3, lr}
844c: e3000734 movw r0, #1844 ; 0x734
8450: e3003734 movw r3, #1844 ; 0x734
8454: e3400001 movt r0, #1
8458: e3403001 movt r3, #1
845c: e0603003 rsb r3, r0, r3
8460: e1a03143 asr r3, r3, #2
8464: e0833fa3 add r3, r3, r3, lsr #31
8468: e1b010c3 asrs r1, r3, #1
846c: 08bd8008 popeq {r3, pc}
8470: e3002000 movw r2, #0
8474: e3402000 movt r2, #0
8478: e3520000 cmp r2, #0
847c: 08bd8008 popeq {r3, pc}
8480: e12fff32 blx r2
8484: e8bd8008 pop {r3, pc}
00008488 <__do_global_dtors_aux>:
8488: e92d4010 push {r4, lr}
848c: e3004734 movw r4, #1844 ; 0x734
8490: e3404001 movt r4, #1
8494: e5d43000 ldrb r3, [r4]
8498: e3530000 cmp r3, #0
849c: 18bd8010 popne {r4, pc}
84a0: ebffffda bl 8410 <deregister_tm_clones>
84a4: e3a03001 mov r3, #1
84a8: e5c43000 strb r3, [r4]
84ac: e8bd8010 pop {r4, pc}
000084b0 <frame_dummy>:
84b0: e300061c movw r0, #1564 ; 0x61c
84b4: e3400001 movt r0, #1
84b8: e92d4008 push {r3, lr}
84bc: e5903000 ldr r3, [r0]
84c0: e3530000 cmp r3, #0
84c4: 0a000004 beq 84dc <frame_dummy+0x2c>
84c8: e3003000 movw r3, #0
84cc: e3403000 movt r3, #0
84d0: e3530000 cmp r3, #0
84d4: 0a000000 beq 84dc <frame_dummy+0x2c>
84d8: e12fff33 blx r3
84dc: e8bd4008 pop {r3, lr}
84e0: eaffffd8 b 8448 <register_tm_clones>
000084e4 <main>:
84e4: e52db004 push {fp} ; (str fp, [sp, #-4]!)
84e8: e28db000 add fp, sp, #0
84ec: e24dd014 sub sp, sp, #20
84f0: e50b0010 str r0, [fp, #-16]
84f4: e50b1014 str r1, [fp, #-20] ; 0xffffffec
84f8: e308358c movw r3, #34188 ; 0x858c
84fc: e3403000 movt r3, #0
8500: e50b3008 str r3, [fp, #-8]
8504: e3a03000 mov r3, #0
8508: e1a00003 mov r0, r3
850c: e28bd000 add sp, fp, #0
8510: e8bd0800 ldmfd sp!, {fp}
8514: e12fff1e bx lr
00008518 <__libc_csu_init>:
8518: e92d45f8 push {r3, r4, r5, r6, r7, r8, sl, lr}
851c: e1a07000 mov r7, r0
8520: e59f504c ldr r5, [pc, #76] ; 8574 <__libc_csu_init+0x5c>
8524: e1a08001 mov r8, r1
8528: e59f6048 ldr r6, [pc, #72] ; 8578 <__libc_csu_init+0x60>
852c: e1a0a002 mov sl, r2
8530: e08f5005 add r5, pc, r5
8534: ebffff8c bl 836c <_init>
8538: e08f6006 add r6, pc, r6
853c: e0656006 rsb r6, r5, r6
8540: e1b06146 asrs r6, r6, #2
8544: 08bd85f8 popeq {r3, r4, r5, r6, r7, r8, sl, pc}
8548: e2455004 sub r5, r5, #4
854c: e3a04000 mov r4, #0
8550: e5b53004 ldr r3, [r5, #4]!
8554: e1a00007 mov r0, r7
8558: e1a01008 mov r1, r8
855c: e1a0200a mov r2, sl
8560: e2844001 add r4, r4, #1
8564: e12fff33 blx r3
8568: e1540006 cmp r4, r6
856c: 1afffff7 bne 8550 <__libc_csu_init+0x38>
8570: e8bd85f8 pop {r3, r4, r5, r6, r7, r8, sl, pc}
8574: 000080dc .word 0x000080dc
8578: 000080d8 .word 0x000080d8
0000857c <__libc_csu_fini>:
857c: e12fff1e bx lr
Disassembly of section .fini:
00008580 <_fini>:
8580: e92d4008 push {r3, lr}
8584: e8bd8008 pop {r3, pc}
セグメンテーションあり:
~/android/out/debug/target/product/generic/system/bin/dalvikvm: file format elf32-littlearm
Disassembly of section .plt:
00008410 <.plt>:
8410: e52de004 .word 0xe52de004
8414: e59fe004 .word 0xe59fe004
8418: e08fe00e .word 0xe08fe00e
841c: e5bef008 .word 0xe5bef008
8420: 00000cc0 .word 0x00000cc0
8424: e28fc600 .word 0xe28fc600
8428: e28cca00 .word 0xe28cca00
842c: e5bcfcc0 .word 0xe5bcfcc0
Disassembly of section .text:
00008430 <__aeabi_llsr-0x30>:
8430: e1a0000d .word 0xe1a0000d
8434: e3a01000 .word 0xe3a01000
8438: e28f2004 .word 0xe28f2004
843c: e28f3004 .word 0xe28f3004
8440: eafffff7 .word 0xeafffff7
8444: ea000014 .word 0xea000014
8448: 00009000 .word 0x00009000
844c: 00009008 .word 0x00009008
8450: 00009010 .word 0x00009010
8454: 00009018 .word 0x00009018
8458: e1a00000 .word 0xe1a00000
845c: e1a00000 .word 0xe1a00000
00008460 <__aeabi_llsr>:
8460: e2523020 subs r3, r2, #32
8464: e262c020 rsb ip, r2, #32
8468: 41a00230 lsrmi r0, r0, r2
846c: 51a00331 lsrpl r0, r1, r3
8470: 41800c11 orrmi r0, r0, r1, lsl ip
8474: e1a01231 lsr r1, r1, r2
8478: e12fff1e bx lr
0000847c <__aeabi_llsl>:
847c: e2523020 subs r3, r2, #32
8480: e262c020 rsb ip, r2, #32
8484: 41a01211 lslmi r1, r1, r2
8488: 51a01310 lslpl r1, r0, r3
848c: 41811c30 orrmi r1, r1, r0, lsr ip
8490: e1a00210 lsl r0, r0, r2
8494: e12fff1e bx lr
8498: 47702000 ldrbmi r2, [r0, -r0]!
849c: e51ff004 ldr pc, [pc, #-4] ; 84a0 <__aeabi_llsl+0x24>
84a0: 00008499 muleq r0, r9, r4
どんな助けやアイデアも大歓迎です。ありがとう