Attachment #32962 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 647-673 ENTRY(break_fault) Link Here

(-)/usr/src/linux-2.4.21-286/arch/ia64/kernel/ivt.S (-4 / +13 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
659	(p7) adds r16=(__NR_ni_syscall-1024)*8,r16 // force __NR_ni_syscall	665	(p7) adds r16=(__NR_ni_syscall-1024)*8,r16 // force __NR_ni_syscall
		666	ld8 r2=[r2] // r2 = current->ptrace
		667	movl r15=ia64_ret_from_syscall
660	;;	668	;;
661	ld8 r16=[r16] // load address of syscall entry point	669	ld8 r16=[r16] // load address of syscall entry point
662	mov rp=r15 // set the real return addr	670	mov rp=r15 // set the real return addr
663	;;
664	ld8 r2=[r2] // r2 = current->ptrace
665	mov r19=PT_TRACEAUDITMASK // r19 = PT_TRACESYS\|PT_AUDITED	671	mov r19=PT_TRACEAUDITMASK // r19 = PT_TRACESYS\|PT_AUDITED
666	mov b6=r16	672	;;
667		673
668	// arrange things so we skip over break instruction when returning:	674	// arrange things so we skip over break instruction when returning:
669		675
670	adds r16=16,sp // get pointer to cr_ipsr	676	adds r16=16,sp // get pointer to cr_ipsr
		677	mov b6=r16
671	adds r17=24,sp // get pointer to cr_iip	678	adds r17=24,sp // get pointer to cr_iip
672	;;	679	;;
673	ld8 r18=[r16] // fetch cr_ipsr	680	ld8 r18=[r16] // fetch cr_ipsr
Lines 693-698 ENTRY(break_fault) Link Here
693	// NOT REACHED	700	// NOT REACHED
694	END(break_fault)	701	END(break_fault)
695		702
		703	// Ensure that the syscall arguments plus r15 (syscall number) are valid.
		704	// Exit with r2 containing the frame size when the syscall was issued.
696	ENTRY(demine_args)	705	ENTRY(demine_args)
697	alloc r2=ar.pfs,8,0,0,0	706	alloc r2=ar.pfs,8,0,0,0
698	tnat.nz p8,p0=in0	707	tnat.nz p8,p0=in0

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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