英語 での The data segment の使用例とその 日本語 への翻訳
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Ecclesiastic
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Computer
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Programming
Normally you use these in the data segment.
In the data segment you need to have these variables.
There is even another case where the data segment is allocated at 00400H.
Also, do not page-align the data segment, and disable linking against shared libraries.
RLIMIT_DATA The maximum size(in bytes) of the data segment for a process;
To deal with it, the data segment's linear address must be mapped to the given physical address.
Used to convey size information on items in the data segment of shared objects.
Additionally you have filter options to view the data segmented per user, event or cohort period.
And page fault will occurwhen the APM BIOS attempts to access the data segment.
A program cannot generally execute code in the data segment or write into the code segment. .
End is the first address after the end of the data segment( BSS) when the program is loaded.
Use the sbrk(2)system call with zero as its argument to find the current end of the data segment.
RAID 0 breaks up data into smaller segments and stripes the data segments across each drive in the drive group.
The data segment contains the initialized and uninitialized data portions of a program, whereas the stack segment holds the application's run-time stack.
It sets the text section to be read-only, and forces the data segment to be page-aligned.
However, apm_init() does not do it and uses the data segment's physical address obtained from the APM BIOS as the data segment's base address, regarding it as linear address.
Likewise, procedure calls to globally defined functions are redirected through the Procedure Linkage Table(PLT)residing in the data segment of the core image.
However, as the data memory is volatile, the data segment contents will not remain intact once the microcontroller is powered off.
In this case, assuming that no previous segment data directive was found in the assembly file,the assembler will begin the data segment at address 0000h.
Specifically, I mapped the data segment's physical address to an area using map_physical_memory(), and stored the virtual address of the area(should be equivalent to linear address because of 32-bit flat model) in the segment descriptor as the data segment's base address.
RAID 0 divides data into smaller segments andthen stripes the data segments across each drive in the drive group.
This would be okay if the linear address and the physical address were same, but actually this does not appear true in the conventional memory and page fault will occurwhen the APM BIOS attempts to access the data segment.
This type of failure can be difficult to analyze, because as soon as the device is hooked back up to the debugger,MAX-IDE will begin loading the data segment again before each run and the problem will instantly vanish.
However, once the device is powered off and on and allowed to run independently(with no debugger connected),MAX-IDE no longer has the ability to load the data segment with the proper values before each run.
This application note uses the MAXQ2000 EV(evaluation) kit to demonstrate first, how to save these preloaded data memory values in flash during the initial application run,and then how to refresh the data segment values from flash when the microcontroller is subsequently powered on again.