Attachment #32963 for bug #65236

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Lines 46-53 Link Here

(-)/usr/src/linux-2.4.21-286/arch/ia64/kernel/entry.S (-7 / +19 lines)
46	* setup a null register window frame.	46	* setup a null register window frame.
47	*/	47	*/
48	ENTRY(ia64_execve)	48	ENTRY(ia64_execve)
49	.prologue ASM_UNW_PRLG_RP\|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(3)	49	/*
50	alloc loc1=ar.pfs,3,2,4,0	50	* Allocate 8 input registers since ptrace() may clobber them
		51	*/
		52	.prologue ASM_UNW_PRLG_RP\|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8)
		53	alloc loc1=ar.pfs,8,2,4,0
51	mov loc0=rp	54	mov loc0=rp
52	.body	55	.body
53	mov out0=in0 // filename	56	mov out0=in0 // filename
Lines 89-96 ENTRY(ia64_execve) Link Here
89	END(ia64_execve)	92	END(ia64_execve)
90		93
91	GLOBAL_ENTRY(sys_clone2)	94	GLOBAL_ENTRY(sys_clone2)
92	.prologue ASM_UNW_PRLG_RP\|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(2)	95	/*
93	alloc r16=ar.pfs,3,2,4,0	96	* Allocate 8 input registers since ptrace() may clobber them
		97	*/
		98	.prologue ASM_UNW_PRLG_RP\|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8)
		99	alloc r16=ar.pfs,8,2,4,0
94	DO_SAVE_SWITCH_STACK	100	DO_SAVE_SWITCH_STACK
95	mov loc0=rp	101	mov loc0=rp
96	mov loc1=r16 // save ar.pfs across do_fork	102	mov loc1=r16 // save ar.pfs across do_fork
Lines 108-115 GLOBAL_ENTRY(sys_clone2) Link Here
108	END(sys_clone2)	114	END(sys_clone2)
109		115
110	GLOBAL_ENTRY(sys_clone)	116	GLOBAL_ENTRY(sys_clone)
111	.prologue ASM_UNW_PRLG_RP\|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(2)	117	/*
112	alloc r16=ar.pfs,2,2,4,0	118	* Allocate 8 input registers since ptrace() may clobber them
		119	*/
		120	.prologue ASM_UNW_PRLG_RP\|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8)
		121	alloc r16=ar.pfs,8,2,4,0
113	DO_SAVE_SWITCH_STACK	122	DO_SAVE_SWITCH_STACK
114	mov loc0=rp	123	mov loc0=rp
115	mov loc1=r16 // save ar.pfs across do_fork	124	mov loc1=r16 // save ar.pfs across do_fork
Lines 938-944 END(sys_rt_sigsuspend) Link Here
938		947
939	ENTRY(sys_rt_sigreturn)	948	ENTRY(sys_rt_sigreturn)
940	PT_REGS_UNWIND_INFO(0)	949	PT_REGS_UNWIND_INFO(0)
941	alloc r2=ar.pfs,0,0,1,0	950	/*
		951	* Allocate 8 input registers since ptrace() may clobber them
		952	*/
		953	alloc r2=ar.pfs,8,0,1,0
942	.prologue	954	.prologue
943	PT_REGS_SAVES(16)	955	PT_REGS_SAVES(16)
944	adds sp=-16,sp	956	adds sp=-16,sp

Lines 647-659 ENTRY(break_fault) Link Here

(-)/usr/src/linux-2.4.21-286/arch/ia64/kernel/ivt.S (-29 / +40 lines)
647	SAVE_REST	647	SAVE_REST
648	br.call.sptk.many rp=demine_args // clear NaT bits in (potential) syscall args	648	br.call.sptk.many rp=demine_args // clear NaT bits in (potential) syscall args
649		649
		650	// demine_args exits with r2 containing the frame marker when the syscall was issued.
		651	and r18=0x7f,r2 // get sof of issuer's cfm
		652	extr.u r17=r2,7,7 // get sol of issuer's cfm
		653
650	mov r3=255	654	mov r3=255
651	adds r15=-1024,r15 // r15 contains the syscall number---subtract 1024	655	adds r15=-1024,r15 // r15 contains the syscall number---subtract 1024
652	adds r2=IA64_TASK_PTRACE_OFFSET,r13 // r2 = &current->ptrace	656	adds r2=IA64_TASK_PTRACE_OFFSET,r13 // r2 = &current->ptrace
653	;;	657	;;
		658	add r17=8,r17 // sol + 8
654	cmp.geu p6,p7=r3,r15 // (syscall > 0 && syscall <= 1024+255) ?	659	cmp.geu p6,p7=r3,r15 // (syscall > 0 && syscall <= 1024+255) ?
655	movl r16=sys_call_table	660	movl r16=sys_call_table
656	;;	661	;;
		662	(p6) cmp.lt p7,p6=r17,r18 // frame size can't be more than local+8
		663	;;
657	(p6) shladd r16=r15,3,r16	664	(p6) shladd r16=r15,3,r16
658	movl r15=ia64_ret_from_syscall	665	movl r15=ia64_ret_from_syscall
659	(p7) adds r16=(__NR_ni_syscall-1024)*8,r16 // force __NR_ni_syscall	666	(p7) adds r16=(__NR_ni_syscall-1024)*8,r16 // force __NR_ni_syscall
Lines 693-727 ENTRY(break_fault) Link Here
693	// NOT REACHED	700	// NOT REACHED
694	END(break_fault)	701	END(break_fault)
695		702
696	ENTRY(demine_args)
697	alloc r2=ar.pfs,8,0,0,0
698	tnat.nz p8,p0=in0
699	tnat.nz p9,p0=in1
700	;;
701	(p8) mov in0=-1
702	tnat.nz p10,p0=in2
703	tnat.nz p11,p0=in3
704
705	(p9) mov in1=-1
706	tnat.nz p12,p0=in4
707	tnat.nz p13,p0=in5
708	;;
709	(p10) mov in2=-1
710	tnat.nz p14,p0=in6
711	tnat.nz p15,p0=in7
712
713	(p11) mov in3=-1
714	tnat.nz p8,p0=r15 // demining r15 is not a must, but it is safer
715
716	(p12) mov in4=-1
717	(p13) mov in5=-1
718	;;
719	(p14) mov in6=-1
720	(p15) mov in7=-1
721	(p8) mov r15=-1
722	br.ret.sptk.many rp
723	END(demine_args)
724
725	.align 1024	703	.align 1024
726	/////////////////////////////////////////////////////////////////////////////////////////	704	/////////////////////////////////////////////////////////////////////////////////////////
727	// 0x3000 Entry 12 (size 64 bundles) External Interrupt (4)	705	// 0x3000 Entry 12 (size 64 bundles) External Interrupt (4)
Lines 755-760 END(interrupt) Link Here
755	DBG_FAULT(13)	733	DBG_FAULT(13)
756	FAULT(13)	734	FAULT(13)
757		735
		736	// Ensure that the syscall arguments plus r15 (syscall number) are valid.
		737	// Exit with r2 containing the frame size when the syscall was issued.
		738	// This function belongs to break_fault and can live anywhere (even outside
		739	// the IVT); it's being placed here just to save a little space.
		740	ENTRY(demine_args)
		741	alloc r2=ar.pfs,8,0,0,0
		742	tnat.nz p8,p0=in0
		743	tnat.nz p9,p0=in1
		744	;;
		745	(p8) mov in0=-1
		746	tnat.nz p10,p0=in2
		747	tnat.nz p11,p0=in3
		748
		749	(p9) mov in1=-1
		750	tnat.nz p12,p0=in4
		751	tnat.nz p13,p0=in5
		752	;;
		753	(p10) mov in2=-1
		754	tnat.nz p14,p0=in6
		755	tnat.nz p15,p0=in7
		756
		757	(p11) mov in3=-1
		758	tnat.nz p8,p0=r15 // demining r15 is not a must, but it is safer
		759
		760	(p12) mov in4=-1
		761	(p13) mov in5=-1
		762	;;
		763	(p14) mov in6=-1
		764	(p15) mov in7=-1
		765	(p8) mov r15=-1
		766	br.ret.sptk.many rp
		767	END(demine_args)
		768
758	.align 1024	769	.align 1024
759	/////////////////////////////////////////////////////////////////////////////////////////	770	/////////////////////////////////////////////////////////////////////////////////////////
760	// 0x3800 Entry 14 (size 64 bundles) Reserved	771	// 0x3800 Entry 14 (size 64 bundles) Reserved

Lines 455-461 dump_fpu (struct pt_regs *pt, elf_fpregs Link Here

(-)/usr/src/linux-2.4.21-286/arch/ia64/kernel/process.c (-1 / +1 lines)
455	return 1; /* f0-f31 are always valid so we always return 1 */	455	return 1; /* f0-f31 are always valid so we always return 1 */
456	}	456	}
457		457
458	asmlinkage long	458	long
459	sys_execve (char filename, char argv, char envp, struct pt_regs regs)	459	sys_execve (char filename, char argv, char envp, struct pt_regs regs)
460	{	460	{
461	int error;	461	int error;

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