朋友帮忙看下这段ARM汇编代码

IT回忆录 2016-07-29 09:58:17

这段代码不是很懂，大神们帮小弟给解释成伪C代码。

EXPORT Java_com_demo_d1_app_AesKeyHandler_genAesKey

.text:00000FD0 Java_com_demo_d1_app_AesKeyHandler_genAesKey

.text:00000FD0

.text:00000FD0 var_28          = -0x28

.text:00000FD0 var_1C          = -0x1C

.text:00000FD0

.text:00000FD0                 PUSH    {R4-R7,LR}

.text:00000FD2                 LDR     R1, =(aJavaUtilCalend - 0xFDC)

.text:00000FD4                 LDR     R3, [R0]

.text:00000FD6                 SUB     SP, SP, #0x14

.text:00000FD8                 ADD     R1, PC          ; "java/util/Calendar"

.text:00000FDA                 LDR     R3, [R3,#0x18]

.text:00000FDC                 MOVS    R4, R0

.text:00000FDE                 MOVS    R5, R2

.text:00000FE0                 BLX     R3

.text:00000FE2                 MOVS    R3, #0xE2

.text:00000FE4                 MOVS    R7, R0

.text:00000FE6                 LDR     R2, [R4]

.text:00000FE8                 LSLS    R3, R3, #1

.text:00000FEA                 MOVS    R1, R7

.text:00000FEC                 LDR     R6, [R2,R3]

.text:00000FEE                 LDR     R2, =(aGetinstance - 0xFF8)

.text:00000FF0                 LDR     R3, =(aLjavaUtilCalen - 0xFFA)

.text:00000FF2                 MOVS    R0, R4

.text:00000FF4                 ADD     R2, PC          ; "getInstance"

.text:00000FF6                 ADD     R3, PC          ; "()Ljava/util/Calendar;"

.text:00000FF8                 BLX     R6

.text:00000FFA                 MOVS    R3, #0xE4

.text:00000FFC                 LDR     R1, [R4]

.text:00000FFE                 LSLS    R3, R3, #1

.text:00001000                 MOVS    R2, R0

.text:00001002                 LDR     R3, [R1,R3]

.text:00001004                 MOVS    R0, R4

.text:00001006                 MOVS    R1, R7

.text:00001008                 BLX     R3

.text:0000100A                 LDR     R3, [R4]

.text:0000100C                 LDR     R2, =(aGettimeinmilli - 0x1020)

.text:0000100E                 MOVS    R6, R0

.text:00001010                 ADDS    R3, #8

.text:00001012                 LDR     R3, [R3,#0x7C]

.text:00001014                 MOVS    R1, R7

.text:00001016                 MOV     R12, R3

.text:00001018                 LDR     R3, =(aJ - 0x1022)

.text:0000101A                 MOVS    R0, R4

.text:0000101C                 ADD     R2, PC          ; "getTimeInMillis"

.text:0000101E                 ADD     R3, PC          ; "()J"

.text:00001020                 BLX     R12

.text:00001022                 LDR     R3, [R4]

.text:00001024                 MOVS    R2, R0

.text:00001026                 ADDS    R3, #0xD0

.text:00001028                 LDR     R3, [R3]

.text:0000102A                 MOVS    R0, R4

.text:0000102C                 MOVS    R1, R6

.text:0000102E                 BLX     R3

.text:00001030                 MOVS    R3, #0xAB

.text:00001032                 LDR     R2, [R4]

.text:00001034                 LSLS    R3, R3, #2

.text:00001036                 MOVS    R6, R0

.text:00001038                 MOVS    R7, R1

.text:0000103A                 LDR     R3, [R2,R3]

.text:0000103C                 MOVS    R1, R5

.text:0000103E                 MOVS    R0, R4

.text:00001040                 BLX     R3

.text:00001042                 LDR     R3, =0

.text:00001044                 LDR     R2, =0x5265C00

.text:00001046                 STR     R0, [SP,#0x28+var_1C]

.text:00001048                 MOVS    R1, R7

.text:0000104A                 MOVS    R0, R6

.text:0000104C                 BL      j_j___aeabi_ldivmod

.text:00001050                 LDR     R2, [SP,#0x28+var_1C]

.text:00001052                 SUBS    R2, #0x10

.text:00001054                 ASRS    R3, R2, #0x1F

.text:00001056                 BL      j_j___aeabi_ldivmod

.text:0000105A                 MOVS    R3, #0xB8

.text:0000105C                 MOVS    R6, R2

.text:0000105E                 LDR     R2, [R4]

.text:00001060                 LSLS    R3, R3, #2

.text:00001062                 MOVS    R1, R5

.text:00001064                 LDR     R3, [R2,R3]

.text:00001066                 MOVS    R0, R4

.text:00001068                 MOVS    R2, #0

.text:0000106A                 BLX     R3

.text:0000106C                 MOVS    R3, #0xB0

.text:0000106E                 LDR     R2, [R4]

.text:00001070                 LSLS    R3, R3, #2

.text:00001072                 MOVS    R7, R0

.text:00001074                 LDR     R3, [R2,R3]

.text:00001076                 MOVS    R0, R4

.text:00001078                 MOVS    R1, #0x10

.text:0000107A                 BLX     R3

.text:0000107C                 MOVS    R3, #0xD0

.text:0000107E                 MOVS    R5, R0

.text:00001080                 LDR     R2, [R4]

.text:00001082                 ADDS    R6, R7, R6

.text:00001084                 STR     R6, [SP,#0x28+var_28]

.text:00001086                 LSLS    R3, R3, #2

.text:00001088                 LDR     R6, [R2,R3]

.text:0000108A                 MOVS    R0, R4

.text:0000108C                 MOVS    R1, R5

.text:0000108E                 MOVS    R2, #0

.text:00001090                 MOVS    R3, #0x10

.text:00001092                 BLX     R6

.text:00001094                 MOVS    R0, R5

.text:00001096                 ADD     SP, SP, #0x14

.text:00001098                 POP     {R4-R7,PC}

.text:00001098 ; End of function Java_com_demo_d1_app_AesKeyHandler_genAesKey