On Wed, 2007-12-12 at 16:45 +1100, Michael Neuling wrote: > This makes the setjmp/longjmp code used by xmon, generically available > to other code. It also removes the requirement for debugger hooks to > be only called on 0x300 (data storage) exception. > > Signed-off-by: Michael Neuling <[EMAIL PROTECTED]> > --- > > arch/powerpc/kernel/misc_64.S | 124 ++++++++++++++++++++++++++++++++++++++ > arch/powerpc/mm/fault.c | 6 - > arch/powerpc/xmon/Makefile | 2 > arch/powerpc/xmon/setjmp.S | 135 > ------------------------------------------ > arch/powerpc/xmon/xmon.c | 10 --- > include/asm-powerpc/setjmp.h | 12 +++ > 6 files changed, 142 insertions(+), 147 deletions(-) > > Index: linux-2.6-ozlabs/arch/powerpc/kernel/misc_64.S > =================================================================== > --- linux-2.6-ozlabs.orig/arch/powerpc/kernel/misc_64.S > +++ linux-2.6-ozlabs/arch/powerpc/kernel/misc_64.S > @@ -518,6 +518,130 @@ _GLOBAL(giveup_altivec) > > #endif /* CONFIG_ALTIVEC */ > > +_GLOBAL(setjmp) > + mflr r0 > + PPC_STL r0,0(r3) > + PPC_STL r1,SZL(r3) > + PPC_STL r2,2*SZL(r3) > + mfcr r0 > + PPC_STL r0,3*SZL(r3) > + PPC_STL r13,4*SZL(r3) > + PPC_STL r14,5*SZL(r3) > + PPC_STL r15,6*SZL(r3) > + PPC_STL r16,7*SZL(r3) > + PPC_STL r17,8*SZL(r3) > + PPC_STL r18,9*SZL(r3) > + PPC_STL r19,10*SZL(r3) > + PPC_STL r20,11*SZL(r3) > + PPC_STL r21,12*SZL(r3) > + PPC_STL r22,13*SZL(r3) > + PPC_STL r23,14*SZL(r3) > + PPC_STL r24,15*SZL(r3) > + PPC_STL r25,16*SZL(r3) > + PPC_STL r26,17*SZL(r3) > + PPC_STL r27,18*SZL(r3) > + PPC_STL r28,19*SZL(r3) > + PPC_STL r29,20*SZL(r3) > + PPC_STL r30,21*SZL(r3) > + PPC_STL r31,22*SZL(r3) > + li r3,0 > + blr > + > +_GLOBAL(longjmp) > + PPC_LCMPI r4,0 > + bne 1f > + li r4,1 > +1: PPC_LL r13,4*SZL(r3) > + PPC_LL r14,5*SZL(r3) > + PPC_LL r15,6*SZL(r3) > + PPC_LL r16,7*SZL(r3) > + PPC_LL r17,8*SZL(r3) > + PPC_LL r18,9*SZL(r3) > + PPC_LL r19,10*SZL(r3) > + PPC_LL r20,11*SZL(r3) > + PPC_LL r21,12*SZL(r3) > + PPC_LL r22,13*SZL(r3) > + PPC_LL r23,14*SZL(r3) > + PPC_LL r24,15*SZL(r3) > + PPC_LL r25,16*SZL(r3) > + PPC_LL r26,17*SZL(r3) > + PPC_LL r27,18*SZL(r3) > + PPC_LL r28,19*SZL(r3) > + PPC_LL r29,20*SZL(r3) > + PPC_LL r30,21*SZL(r3) > + PPC_LL r31,22*SZL(r3) > + PPC_LL r0,3*SZL(r3) > + mtcrf 0x38,r0 > + PPC_LL r0,0(r3) > + PPC_LL r1,SZL(r3) > + PPC_LL r2,2*SZL(r3) > + mtlr r0 > + mr r3,r4 > + blr > + > +#ifdef CONFIG_XMON > +/* > + * Grab the register values as they are now. > + * This won't do a particularily good job because we really > + * want our caller's caller's registers, and our caller has > + * already executed its prologue. > + * ToDo: We could reach back into the caller's save area to do > + * a better job of representing the caller's state (note that > + * that will be different for 32-bit and 64-bit, because of the > + * different ABIs, though). > + */ > +_GLOBAL(xmon_save_regs) > + PPC_STL r0,0*SZL(r3) > + PPC_STL r2,2*SZL(r3) > + PPC_STL r3,3*SZL(r3) > + PPC_STL r4,4*SZL(r3)
Does xmon_save_regs belong here? cheers -- Michael Ellerman OzLabs, IBM Australia Development Lab wwweb: http://michael.ellerman.id.au phone: +61 2 6212 1183 (tie line 70 21183) We do not inherit the earth from our ancestors, we borrow it from our children. - S.M.A.R.T Person
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