How to add a haradware breakpoint on a physical memory address?
I found some memory was rewrite by gpu module, but i have not found where it layout. I just use samples hw_breakpoint module for memory monitor. However, i found it only monitor on a virtual address, in another words, if two variable point the same physical memory, it can't be detected if I just monitor on the other variable. any hints will be very very appreciated.
On Fri, 17 Nov 2017 17:57:26 +0800, kipade said:
I found some memory was rewrite by gpu module, but i have not found where it layout. I just use samples hw_breakpoint module for memory monitor. However, i found it only monitor on a virtual address, in another words, if two variable point the same physical memory, it can't be detected if I just monitor on the other variable.
If you have two different variables pointing to the same physical address, you *probably* are doing something wrong. Why was something else using memory that got used by the GPU?
Thanks for your reply. The real fact is, a block of physical memory was reserver whilekernel booting, so that, the block of memory can not used by the whole memoryusing the normal api, such as malloc, get_free_pages.(because the block of memoryhave to reserved for remote dsp core). However, the block of memory was rewrittenif the application called eglSwapBuffer. and the gpu driver using gem memorymanaging method, i checked all pages allocated for ever gem_object but foundnothing. At 2017-11-17 23:03:32, valdis.kletnieks@vt.edu wrote:
On Fri, 17 Nov 2017 17:57:26 +0800, kipade said:
I found some memory was rewrite by gpu module, but i have not found where it layout. I just use samples hw_breakpoint module for memory monitor. However, i found it only monitor on a virtual address, in another words, if two variable point the same physical memory, it can't be detected if I just monitor on the other variable.
If you have two different variables pointing to the same physical address, you *probably* are doing something wrong. Why was something else using memory that got used by the GPU?
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valdis.kletnieks＠vt.edu