我有一个asm文件，它是用IDA Pro生成的。它的所有函数看起来都像这样。

; =============== S U B R O U T I N E =======================================

release                                 ; DATA XREF: attribute_manager_create+78↓o
                                        ; attribute_manager_create+7C↓o ...

var_30          = -0x30
var_24          = -0x24
arg_0           =  0
arg_4           =  4

                PUSH    {R4-R9,LR}
                MOV     R7, R0
                LDR     R0, [R0,#0x34]
                SUB     SP, SP, #0x14
                MOV     R9, R3
                LDR     R3, [R0]
                MOV     R5, R1
                MOV     R8, R2
                BLX     R3
                LDR     R0, [R7,#0x30]
                ADD     R6, SP, #0x30+var_24
                LDR     R3, [R0,#4]
                BLX     R3
                MOV     R4, R0
                B       loc_7A7C
; ---------------------------------------------------------------------------

loc_7A70                                ; CODE XREF: release+5C↓j
                LDR     R3, [SP,#0x30+var_24]
                CMP     R3, R5
                BEQ     loc_7AB4

loc_7A7C                                ; CODE XREF: release+38↑j
                LDR     R3, [R4]
                MOV     R1, R6
                MOV     R0, R4
                BLX     R3
                CMP     R0, #0
                BNE     loc_7A70

loc_7A94                                ; CODE XREF: release+A0↓j
                LDR     R3, [R4,#8]
                MOV     R0, R4
                BLX     R3
                LDR     R0, [R7,#0x34]
                LDR     R3, [R0,#0xC]
                BLX     R3
                ADD     SP, SP, #0x14
                POP     {R4-R9,PC}
; ---------------------------------------------------------------------------

loc_7AB4                                ; CODE XREF: release+44↑j
                LDR     R3, [SP,#0x30+arg_4]
                STR     R3, [SP,#0x30+var_30]
                MOV     R2, R9
                LDR     R3, [SP,#0x30+arg_0]
                LDR     R6, [R5,#4]
                MOV     R1, R8
                MOV     R0, R5
                BLX     R6
                B       loc_7A94
; End of function release

我想解析这个文件，并得到一个字典，其中的键将是函数的名称，值将是一个由组合在一起的指令组成的字符串。我将更详细地解释。
我有一个字典，其中每个Arm指令对应一个特定的字母。

arm_dict = {"MOV": "a","MVN": "b","ADD": "c","SUB": "d","MUL": "e","LSL": "f","LSR": "g","ASR": "h","ROR": "i","CMP": "j","AND": "k","ORR": "l","EOR": "m","LDR": "n","STR": "o","LDM": "p","STM": "q","PUSH": "r","POP": "s","B": "t","BL": "u","BLX": "v","BEQ": "w","SWI": "x","SVC": "y","NOP": "z"}

解析时，需要指令变成这个字母。例如，字典中的上述函数应该是这样的：

{'release': 'randanaavncnvat...'}

如果代码包含不在arm_dict中的指令，则跳过该指令。
我尝试过使用包含“S U B R O U T I N E”和“End of function”的字符串进行线性解析，但我无法摆脱指令操作数。如果有人能提供一些示例代码或建议，我会很高兴。