On Thu, 5 Sep 2002 19:41:22 +0200 Angelo Dell'Aera <buffer@users.sourceforge.net> wrote: > pushl %esi # push the error code > pushl %edx # push the pt_regs pointer > movl $(__KERNEL_DS),%edx > movl %edx,%ds > movl %edx,%es > GET_CURRENT(%ebx) <- current process descriptor stored in %ebx > > call *%edi <- here handler (whose address is in %esi) is called > but look at the stack! > In the stack handler finds : > -return address of the instruction to be > executed after C handler > -error hardware code > -SYMBOL_NAME > -registers saved > -the stack address of the saved User Mode > registers > -error hardware code > <---%esp points here That's completely wrong! The correct stack layout at this moment is this one : -registers saved by CPU control unit (%eflags, %cs and %eip) -error hardware code -SYMBOL_NAME -registers saved (in error_code) -error hardware code -the stack address of the saved User Mode registers -return address of the instruction to be executed after C handler <- %esp points here Now everything should appear clear! Regards, Angelo Dell'Aera 'buffer' <buffer@users.sourceforge.net> -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
