Still no answer... > From: bo-liu@xxxxxxxxxxx > To: sparclinux@xxxxxxxxxxxxxxx > Subject: help about trap_setup.. > Date: Thu, 11 Dec 2008 11:17:54 +0800 > > > In trap path "trap_setup", if in trap window we will jmp to "trap_setup_kernel_spill". > > /* See if we are in the trap window. */ > 93 andcc %t_twinmask, %t_wim, %g0 > 94 bne trap_setup_kernel_spill ! in trap window, clean up > 95 nop > 96 > 97 /* Trap from kernel with a window available. > 98 * Just do it... > 99 */ > 100 jmpl %t_retpc + 0x8, %g0 ! return to caller > 101 mov %t_kstack, %sp ! jump onto new stack > 102 > 103trap_setup_kernel_spill: > 104 ld [%curptr + TI_UWINMASK], %g1 > 105 orcc %g0, %g1, %g0 > 106 bne trap_setup_user_spill ! there are some user windows, yuck > > But where is the %curptr in line 104 is setted? > > the comment said #define curptr g6 /* Set after pt_regs frame is built */ > > but i can't find the code set %g6 in these scene. > > what'more, what are "user windows" like the line 106 said meaning. There need a lot of particular dealing, > > I am still reading it. > > Thanks! > _________________________________________________________________ Explore the seven wonders of the world http://search.msn.com/results.aspx?q=7+wonders+world&mkt=en-US&form=QBRE -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
