Hi Liyan, This looks like a stack address to me, so it won't appear in the objdump.
Since you're using SE mode, gem5 is controlling the physical address mappings (not the OS). You can use the "Vma" debug flag to see all of the virtual memory areas that gem5 creates/assigns. the "SyscallVerbose" flag could also be useful. Cheers, Jason On Mon, Mar 21, 2022 at 12:46 AM liyan.chen--- via gem5-users < gem5-users@gem5.org> wrote: > Hi all, > > I used the following command to view the virtual address translation > process. > > build/X86/gem5.opt --debug-flags=Exec,TLB > --debug-file=/home/liyan/Desktop/gem5/m5out/debug.txt configs/example/se.py > --cpu-type=TimingSimpleCPU --caches --l2cache --mem-type=DRAMsim3 > --num-cpus=1 -c "tests/test-progs/hello/bin/x86/linux/hello" > > However, I found some strange virtual address such as 0x7fffffffee20 > > 56500: system.cpu.dtb: Translating vaddr 0x7fffffffee20. > 56500: system.cpu.dtb: In protected mode. > 56500: system.cpu.dtb: Paging enabled. > 56500: system.cpu.dtb: Handling a TLB miss for address 0x7fffffffee20 at > pc 0x400a55. > 56500: system.cpu.dtb: Mapping 0x7fffffffe000 to 0xbd000 > 56500: system.cpu.dtb: Miss was serviced. > 56500: system.cpu.dtb: Entry found with paddr 0xbd000, doing protection > checks. > 56500: system.cpu.dtb: Translated 0x7fffffffee20 -> 0xbde20. > > And it(0x7fffffffee20) also appears here(I don't know whether there is any > relationship) > > 56500: system.cpu T0 : @_start+5 : pop rsi > 56500: system.cpu T0 : @_start+5.0 : POP_R : ldis t1, SS:[rsp] : > MemRead : D=0x0000000000000001 A=0x7fffffffee20 > 110500: system.cpu T0 : @_start+5.1 : POP_R : addi rsp, rsp, 0x8 : > IntAlu : D=0x00007fffffffee28 > 110500: system.cpu T0 : @_start+5.2 : POP_R : mov rsi, rsi, t1 : > IntAlu : D=0x0000000000000001 > > Then I used following command to check the address in hello.dump file but > didn't find such address. > > objdump -D hello > hello.dump > > I'm not familiar with the compilation process and work flow of the core. > Does anyone know why these address exist? > > Any ideas are appreciated! Please reply if you have some advice. Thanks in > advance! > > Liyan Chen > _______________________________________________ > gem5-users mailing list -- gem5-users@gem5.org > To unsubscribe send an email to gem5-users-le...@gem5.org > %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s >
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