Hi, Thanks for answering ... ~ nandac On Jan 29, 2008 5:06 PM, Luciano Rocha <luciano@xxxxxxxxxxx> wrote: > > On Tue, Jan 29, 2008 at 04:42:49PM +0530, Chetan Nanda wrote: > > Hi, > > I am reading linux kernel code (i386/kernel/entry.S) it contains few > > assembly instruction like: > > > > .section __ex_table,"a" > > .align 4 > > .long 1b,syscall_fault > > .previous > > .section .fixup,"ax" > > .section .rodata,"a" > > .pushsection > > .popsection > > etc .... > > > > How to understand these assembly statements. Please provide me some > > pointers to it. > > These aren't assembly instructions, but assembler/linker stuff. > > Run "info gas", or your favourite info viewer, and search for those > words. > > E.g.: > 7.81 `.previous' > ================ > > This is one of the ELF section stack manipulation directives. The > others are `.section' (*note Section::), `.subsection' (*note > SubSection::), `.pushsection' (*note PushSection::), and `.popsection' > (*note PopSection::). > > This directive swaps the current section (and subsection) with most > recently referenced section (and subsection) prior to this one. > Multiple `.previous' directives in a row will flip between two sections > (and their subsections). > > In terms of the section stack, this directive swaps the current > section with the top section on the section stack. > > -- > Luciano Rocha <luciano@xxxxxxxxxxx> > Eurotux Informática, S.A. <http://www.eurotux.com/> > -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
