I need some urgent help with the below issue, tnx, ovi [EMAIL PROTECTED]
Ovidiu Nastai wrote: > > Rod, Bart, > > I noticed a different address space layout for an app (i.e. vi) on > different platforms (see below). is ELF allowing for what I notice on > T1000/T2000 platforms (.text segment "split") and 2 extra "anon" pages? > may I know the rationale behind (i.e. is that machine-specific)? is > there in OpenSolaris.com, same source code that I can walk to better > understand? > > Regards, > ovi > > > T1000/T2000 (sun4v) > --------------------------------- > 00010000 192K r-x-- /usr/bin/vi > 00040000 8K r-x-- /usr/bin/vi > 00052000 40K rwx-- /usr/bin/vi > 0005C000 16K rwx-- [ anon ] > 00060000 576K rwx-- [ heap ] > FF1E0000 8K r-x-- /platform/sun4v/lib/libc_psr.so.1 > FF1F0000 8K rw--- [ anon ] > FF200000 832K r-x-- /lib/libc.so.1 > FF2D0000 32K r-x-- /lib/libc.so.1 > FF2E8000 32K rwx-- /lib/libc.so.1 > FF2F0000 8K rwx-- /lib/libc.so.1 > Non-Txxx system (sun4u) > ------------------------------------- > 00010000 200K r-x-- /usr/bin/vi > 00052000 40K rwx-- /usr/bin/vi > 0005C000 576K rwx-- [ heap ] > FF1C0000 16K r-x-- > /usr/lib/locale/en_US.ISO8859-1/en_US.ISO8859-1.so.3 > FF1D2000 16K rwx-- > /usr/lib/locale/en_US.ISO8859-1/en_US.ISO8859-1.so.3 > FF1E8000 16K r-x-- /platform/sun4u/lib/libc_psr.so.1 > FF1F0000 8K rw--- [ anon ] Sorry, but I have no idea why the mappings look different. There are differences between platforms in regards to where a file is mapped, and in some cases (psr libraries) what files get loaded. But I don't know enough about our VM to know what the "split text" or extra anon are all about. Perhaps some VM savvy folks on the tools-linking alias will come up with something. Although, this isn't really a linking issue. The link editors simply put together ELF files and ask the kernel to map them. Where the files get placed (for shared objects at least) is the kernels choice. How many mmappings contribute to an executable don't matter to ld.so.1(1) either - the runtime linker simply sees a contiguous virtual address space. You might try opensolaris-discuss@opensolaris.org to see if you can fish out some more knowledgeable folks. -- Rod. This message posted from opensolaris.org _______________________________________________ opensolaris-discuss mailing list opensolaris-discuss@opensolaris.org
