Thank you, Roland,
Roland Mainz wrote:
> Jason Zhao wrote:
>
>> Adam Leventhal wrote:
>>
>>> Hi Jason,
>>>
>>> It would appear that your shell is a 32-bit process and you're
>>> recording the stack on entry to exece rather than the return. That is
>>> to say, you're recording the stack of your shell rather than the stack
>>> of the 64-bit ls process:
>>>
>>> # dtrace -n 'syscall::exece:return{ stack(); ustack(); }'dtrace:
>>> description 'syscall::exece:return' matched 1 probe
>>> CPU ID FUNCTION:NAME
>>> 1 82155 exece:return
>>> unix`sys_syscall32+0x1fc
>>>
>>> 0xfffffd7fff3bd8da
>>>
>> Yes, my shell is 32-bit, as following:
>>
>> # file /usr/bin/bash
>> /usr/bin/bash: ELF 32-bit LSB executable 80386 Version 1 [FPU],
>> dynamically linked, stripped
>>
>> In other words, I should have run 64-bit bash other than 32-bit one. So
>> that I could get 64-bit address.
>>
>
> Solaris doesn't ship a 64bit version of "bash" (yet ; I'll work on that
> soon), right now the only 64bit shell shipped with the OS is ksh93, e.g.
> - /usr/bin/ksh93 is a link to "isaexec" which selects a 32bit or 64bit
> version of ksh93 based on /usr/bin/isalist output
> - /usr/bin/i86/ksh93 is 32bit/i386
> - /usr/bin/amd64/ksh93 is 64bit/AMD64
> - /usr/bin/sparcv7/ksh93 is 32bit/SPARC
> - /usr/bin/sparcv9/ksh93 is 64bit/SPARC
> - /usr/bin/s390/ksh93 is 32bit/SystemZ
> - /usr/bin/s390x/ksh93 is 64bit/SystemZ
>
> ----
>
It seems like the 64-bit address not only depends on
shell type, but also depends on utilities(commands)
you run.
I run "/usr/bin/ls" got 32-bit, but "/usr/bin/amd64/ls"
got 64-bit address. Is that because 32-bit application
map to memory with 32-bit address? How the address
space is mapped out for a 64 bit application and for
32-bit application?
# file /usr/bin/amd64/ksh93
/usr/bin/amd64/ksh93: ELF 64-bit LSB executable AMD64 Version 1 [SSE
FXSR FPU], dynamically linked, not stripped, no debugging information
available
# /usr/bin/amd64/ksh93
# dtrace -n 'syscall::exece:return{ stack(); ustack(); }'
dtrace: description 'syscall::exece:return' matched 1 probe
CPU ID FUNCTION:NAME
0 59013 exece:return
unix`_sys_sysenter_post_swapgs+0x14b <-----
run /usr/bin/amd64/ls
0xfffffd7fff3bbaea
0 59013 exece:return
unix`_sys_sysenter_post_swapgs+0x14b <----
run /usr/bin/ls
0xfefc50c2
Thanks
Jason
> Bye,
> Roland
>
>
