我试图在堆栈中输入四个褪色点数，然后将其传输到ymm（avx）寄存器中。我的一个朋友正在研究同一个项目，我们的代码看起来很相似，但是当我调用vmovupd ymm0，[rsp]时，我正在获得核心转储。我用调试程序将它缩小到那个调用。
;===== Begin code area ====================================================================================================================================================
%include "debug.inc"
extern printf ;External C++ function for writing to standard output device
extern scanf ;External C++ function for reading from the standard input device
global intrest_calc ;This makes trapezoid_area callable by functions outside of this file.
segment .data ;Place initialized data here
;===== Declare some messages ==============================================================================================================================================
initialmessage db "Welcome to the Bank of Catalina Island", 10, 0
officer db "William Murmann, Cheif Loan Officer: ", 0
rate db "Please enter the current interest rate as a float number: ", 0
months db "Please enter the the time in months for the loan: ", 0
amounts db "Please enter the amounts of the four loans:", 0
xsavenotsupported.notsupportedmessage db "The xsave instruction and the xrstor instruction are not supported in this microprocessor.", 10
db "However, processing will continue without backing up state component data", 10, 0
goodbye db "Have a nice day. Enjoy your trapezoids. ", 10, 0
stringformat db "%s", 0 ;general string format
fourfloatformat db "%lf %lf %lf %lf",0 ;four float format
xsavenotsupported.stringformat db "%s", 0
eight_byte_format db "%lf", 0 ;general 8-byte float format
segment .bss ;Place un-initialized data here.
align 64 ;Insure that the inext data declaration starts on a 64-byte boundar.
backuparea resb 832 ;Create an array for backup storage having 832 bytes.
;===== Begin executable instructions here =================================================================================================================================
segment .text ;Place executable instructions in this segment.
intrest_calc: ;Entry point. Execution begins here.
;=========== Back up all the GPRs whether used in this program or not =====================================================================================================
push rbp ;Save a copy of the stack base pointer
mov rbp, rsp ;We do this in order to be 100% compatible with C and C++.
push rbx ;Back up rbx
push rcx ;Back up rcx
push rdx ;Back up rdx
push rsi ;Back up rsi
push rdi ;Back up rdi
push r8 ;Back up r8
push r9 ;Back up r9
push r10 ;Back up r10
push r11 ;Back up r11
push r12 ;Back up r12
push r13 ;Back up r13
push r14 ;Back up r14
push r15 ;Back up r15
pushf ;Back up rflags
;==========================================================================================================================================================================
;===== Begin State Component Backup =======================================================================================================================================
;==========================================================================================================================================================================
;=========== Before proceeding verify that this computer supports xsave and xrstor ========================================================================================
;Bit #26 of rcx, written rcx[26], must be 1; otherwise xsave and xrstor are not supported by this computer.
;Preconditions: rax holds 1.
mov rax, 1
;Execute the cpuid instruction
cpuid
;Postconditions: If rcx[26]==1 then xsave is supported. If rcx[26]==0 then xsave is not supported.
;=========== Extract bit #26 and test it ==================================================================================================================================
and rcx, 0x0000000004000000 ;The mask 0x0000000004000000 has a 1 in position #26. Now rcx is either all zeros or
;has a single 1 in position #26 and zeros everywhere else.
cmp rcx, 0 ;Is (rcx == 0)?
je xsavenotsupported ;Skip the section that backs up state component data.
;========== Call the function to obtain the bitmap of state components ====================================================================================================
;Preconditions
mov rax, 0x000000000000000d ;Place 13 in rax. This number is provided in the Intel manual
mov rcx, 0 ;0 is parameter for subfunction 0
;Call the function
cpuid ;cpuid is an essential function that returns information about the cpu
;Postconditions (There are 2 of these):
;1. edx:eax is a bit map of state components managed by xsave. At the time this program was written (2014 June) there were exactly 3 state components. Therefore, bits
; numbered 2, 1, and 0 are important for current cpu technology.
;2. ecx holds the number of bytes required to store all the data of enabled state components. [Post condition 2 is not used in this program.]
;This program assumes that under current technology (year 2014) there are at most three state components having a maximum combined data storage requirement of 832 bytes.
;Therefore, the value in ecx will be less than or equal to 832.
;Precaution: As an insurance against a future time when there will be more than 3 state components in a processor of the X86 family the state component bitmap is masked to
;allow only 3 state components maximum.
mov r15, 7 ;7 equals three 1 bits.
and rax, r15 ;Bits 63-3 become zeros.
mov r15, 0 ;0 equals 64 binary zeros.
and rdx, r15 ;Zero out rdx.
;========== Save all the data of all three components except GPRs =========================================================================================================
;The instruction xsave will save those state components with on bits in the bitmap. At this point edx:eax continues to hold the state component bitmap.
;Precondition: edx:eax holds the state component bit map. This condition has been met by the two pops preceding this statement.
xsave [backuparea] ;All the data of state components managed by xsave have been written to backuparea.
push qword -1 ;Set a flag (-1 = true) to indicate that state component data were backed up.
jmp startapplication
;========== Show message xsave is not supported on this platform ==========================================================================================================
xsavenotsupported:
mov rax, 0
mov rdi, .stringformat
mov rsi, .notsupportedmessage ;"The xsave instruction is not suported in this microprocessor.
call printf
push qword 0 ;Set a flag (0 = false) to indicate that state component data were not backed up.
;==========================================================================================================================================================================
;===== End of State Component Backup ======================================================================================================================================
;==========================================================================================================================================================================
;==========================================================================================================================================================================
startapplication: ;===== Begin the application here: Trapezoid area calculation =======================================================================================
;==========================================================================================================================================================================
;=========== Show the initial message =====================================================================================================================================
mov qword rax, 0 ;No data from SSE will be printed
mov rdi, stringformat ;"%s"
mov rsi, initialmessage ;
call printf ;Call a library function to make the output
;=========== Show the officier name =====================================================================================================================================
mov qword rax, 0 ;No data from SSE will be printed
mov rdi, stringformat ;"%s"
mov rsi, officer ;
call printf ;Call a library function to make the output
;=========== Prompt for the rate =============================================================================================================================
mov qword rax, 0 ;No data from SSE will be printed
mov rdi, stringformat ;"%s"
mov rsi, rate ;"Enter the rate: "
call printf ;Call a library function to make the output
;===== Obtain the first base number from the standard input device and store a copy in xmm15 =============================================================================
push qword 0 ;Reserve 8 bytes of storage for the incoming number
mov qword rax, 0 ;SSE is not involved in this scanf operation
mov rdi, eight_byte_format ;"%lf"
mov rsi, rsp ;Give scanf a point to the reserved storage
call scanf ;Call a library function to do the input work
movsd xmm15, [rsp] ;Copy the inputted number to xmm15
pop rax ;Make free the storage that was used by scanf
;=========== Prompt for the amounts =============================================================================================================================
mov qword rax, 0 ;No data from SSE will be printed
mov rdi, stringformat ;"%s"
mov rsi, amounts ;"Enter the other base number: "
call printf ;Call a library function to make the output
;=========== Obtain the amounts =============================================================================================================================
push qword 0
push qword 0
push qword 0
push qword 0
mov rax,0
mov rdi, fourfloatformat
mov rsi, rsp
add rdx, rsp
mov rdx, 8
mov rcx, rsp
add rcx, 16
mov r8, rsp
add r8, 24
call scanf
vmovupd ymm0, [rsp]
pop rax
pop rax
pop rax
pop rax
;=========== Prompt for the amounts =============================================================================================================================
mov qword rax, 0 ;No data from SSE will be printed
mov rdi, stringformat ;"%s"
mov rsi, amounts ;"Enter the other base number: "
call printf ;Call a library function to make the output
;===== Retrieve a copy of the quotient that was backed up earlier =========================================================================================================
pop r14 ;A copy of the quotient is in r14 (temporary storage)
;Now the stack is in the same state as when the application area was entered. It is safe to leave this application area.
;==========================================================================================================================================================================
;===== Begin State Component Restore ======================================================================================================================================
;==========================================================================================================================================================================
;===== Check the flag to determine if state components were really backed up ==============================================================================================
pop rbx ;Obtain a copy of the flag that indicates state component backup or not.
cmp rbx, 0 ;If there was no backup of state components then jump past the restore section.
je setreturnvalue ;Go to set up the return value.
;Continue with restoration of state components;
;Precondition: edx:eax must hold the state component bitmap. Therefore, go get a new copy of that bitmap.
;Preconditions for obtaining the bitmap from the cpuid instruction
mov rax, 0x000000000000000d ;Place 13 in rax. This number is provided in the Intel manual
mov rcx, 0 ;0 is parameter for subfunction 0
;Call the function
cpuid ;cpuid is an essential function that returns information about the cpu
;Postcondition: The bitmap in now in edx:eax
;Future insurance: Make sure the bitmap is limited to a maximum of 3 state components.
mov r15, 7
and rax, r15
mov r15, 0
and rdx, r15
xrstor [backuparea]
;==========================================================================================================================================================================
;===== End State Component Restore ========================================================================================================================================
;==========================================================================================================================================================================
setreturnvalue: ;=========== Set the value to be returned to the caller ===================================================================================================
push r14 ;r14 continues to hold the first computed floating point value.
movsd xmm0, [rsp] ;That first computed floating point value is copied to xmm0[63-0]
pop r14 ;Reverse the push of two lines earlier.
;=========== Restore GPR values and return to the caller ==================================================================================================================
popf ;Restore rflags
pop r15 ;Restore r15
pop r14 ;Restore r14
pop r13 ;Restore r13
pop r12 ;Restore r12
pop r11 ;Restore r11
pop r10 ;Restore r10
pop r9 ;Restore r9
pop r8 ;Restore r8
pop rdi ;Restore rdi
pop rsi ;Restore rsi
pop rdx ;Restore rdx
pop rcx ;Restore rcx
pop rbx ;Restore rbx
pop rbp ;Restore rbp
ret ;No parameter with this instruction. This instruction will pop 8 bytes from
;the integer stack, and jump to the address found on the stack.
;========== End of program
答案 0 :(得分：2)
你使用了错误的调试器。更加注意。
错误不在vmovupd，而在scanf内。原因是你的代码中有两行交换，因此指针参数rdx搞砸了。我相信你可以从这个提示中看到问题。
此外，我无法找到Retrieve a copy of the quotient that was backed up earlier的对应物，显然我的cpu也不行。因此，堆栈是不平衡的，返回地址将被破坏。
此外，您似乎并不关心堆栈对齐，这可能会让您感到意外的段错误。