Merge tiger.hpl.hp.com:/data1/bk/vanilla/linux-2.5

into tiger.hpl.hp.com:/data1/bk/lia64/to-linus-2.5

arch/ia64/ia32/ia32_entry.S

 #include <asm/asmmacro.h>
+#include <asm/ia32.h>
 #include <asm/offsets.h>
 #include <asm/signal.h>
 #include <asm/thread_info.h>
@@ -141,27 +142,35 @@ GLOBAL_ENTRY(ia32_trace_syscall)
 	adds r2=IA64_PT_REGS_R8_OFFSET+16,sp
 	;;
 	st8 [r2]=r3				// initialize return code to -ENOSYS
-	br.call.sptk.few rp=invoke_syscall_trace // give parent a chance to catch syscall args
-	// Need to reload arguments (they may be changed by the tracing process)
-	adds r2=IA64_PT_REGS_R9_OFFSET+16,sp	// r2 = &pt_regs.r9
+	br.call.sptk.few rp=syscall_trace	// give parent a chance to catch syscall args
+.ret2:	// Need to reload arguments (they may be changed by the tracing process)
+	adds r2=IA64_PT_REGS_R1_OFFSET+16,sp	// r2 = &pt_regs.r1
 	adds r3=IA64_PT_REGS_R13_OFFSET+16,sp	// r3 = &pt_regs.r13
+	mov r15=IA32_NR_syscalls
+	;;
+	ld4 r8=[r2],IA64_PT_REGS_R9_OFFSET-IA64_PT_REGS_R1_OFFSET
+	movl r16=ia32_syscall_table
 	;;
 	ld4 r33=[r2],8				// r9 == ecx
 	ld4 r37=[r3],16				// r13 == ebp
+	cmp.ltu.unc p6,p7=r8,r15
 	;;
 	ld4 r34=[r2],8				// r10 == edx
 	ld4 r36=[r3],8				// r15 == edi
+(p6)	shladd r16=r8,3,r16	// force ni_syscall if not valid syscall number
+	;;
+	ld8 r16=[r16]
 	;;
 	ld4 r32=[r2],8				// r11 == ebx
+	mov b6=r16
 	ld4 r35=[r3],8				// r14 == esi
-	;;
-.ret2:	br.call.sptk.few rp=b6			// do the syscall
+	br.call.sptk.few rp=b6			// do the syscall
 .ia32_strace_check_retval:
 	cmp.lt p6,p0=r8,r0			// syscall failed?
 	adds r2=IA64_PT_REGS_R8_OFFSET+16,sp	// r2 = &pt_regs.r8
 	;;
 	st8.spill [r2]=r8			// store return value in slot for r8
-	br.call.sptk.few rp=invoke_syscall_trace // give parent a chance to catch return value
+	br.call.sptk.few rp=syscall_trace	// give parent a chance to catch return value
 .ret4:	alloc r2=ar.pfs,0,0,0,0			// drop the syscall argument frame
 	br.cond.sptk.many ia64_leave_kernel
 END(ia32_trace_syscall)
@@ -199,7 +208,7 @@ END(sys32_fork)
 	.align 8
 	.globl ia32_syscall_table
 ia32_syscall_table:
-	data8 sys32_ni_syscall	  /* 0	-  old "setup(" system call*/
+	data8 sys_ni_syscall	  /* 0	-  old "setup(" system call*/
 	data8 sys_exit
 	data8 sys32_fork
 	data8 sys_read
@@ -216,25 +225,25 @@ ia32_syscall_table:
 	data8 sys_mknod
 	data8 sys_chmod		  /* 15 */
 	data8 sys_lchown	/* 16-bit version */
-	data8 sys32_ni_syscall	  /* old break syscall holder */
-	data8 sys32_ni_syscall
+	data8 sys_ni_syscall	  /* old break syscall holder */
+	data8 sys_ni_syscall
 	data8 sys32_lseek
 	data8 sys_getpid	  /* 20 */
 	data8 sys_mount
 	data8 sys_oldumount
 	data8 sys_setuid	/* 16-bit version */
 	data8 sys_getuid	/* 16-bit version */
-	data8 sys32_ni_syscall /* sys_stime is not supported on IA64 */  /* 25 */
+	data8 sys_ni_syscall	/* sys_stime is not supported on IA64 */  /* 25 */
 	data8 sys32_ptrace
 	data8 sys32_alarm
-	data8 sys32_ni_syscall
+	data8 sys_ni_syscall
 	data8 sys32_pause
 	data8 compat_sys_utime	  /* 30 */
-	data8 sys32_ni_syscall	  /* old stty syscall holder */
-	data8 sys32_ni_syscall	  /* old gtty syscall holder */
+	data8 sys_ni_syscall	  /* old stty syscall holder */
+	data8 sys_ni_syscall	  /* old gtty syscall holder */
 	data8 sys_access
 	data8 sys_nice
-	data8 sys32_ni_syscall	  /* 35 */	  /* old ftime syscall holder */
+	data8 sys_ni_syscall	  /* 35 */	  /* old ftime syscall holder */
 	data8 sys_sync
 	data8 sys_kill
 	data8 sys_rename
@@ -243,7 +252,7 @@ ia32_syscall_table:
 	data8 sys_dup
 	data8 sys32_pipe
 	data8 compat_sys_times
-	data8 sys32_ni_syscall	  /* old prof syscall holder */
+	data8 sys_ni_syscall	  /* old prof syscall holder */
 	data8 sys32_brk		  /* 45 */
 	data8 sys_setgid	/* 16-bit version */
 	data8 sys_getgid	/* 16-bit version */
@@ -252,13 +261,13 @@ ia32_syscall_table:
 	data8 sys_getegid	/* 16-bit version */	  /* 50 */
 	data8 sys_acct
 	data8 sys_umount	  /* recycled never used phys( */
-	data8 sys32_ni_syscall	  /* old lock syscall holder */
+	data8 sys_ni_syscall	  /* old lock syscall holder */
 	data8 compat_sys_ioctl
 	data8 compat_sys_fcntl	  /* 55 */
-	data8 sys32_ni_syscall	  /* old mpx syscall holder */
+	data8 sys_ni_syscall	  /* old mpx syscall holder */
 	data8 sys_setpgid
-	data8 sys32_ni_syscall	  /* old ulimit syscall holder */
-	data8 sys32_ni_syscall
+	data8 sys_ni_syscall	  /* old ulimit syscall holder */
+	data8 sys_ni_syscall
 	data8 sys_umask		  /* 60 */
 	data8 sys_chroot
 	data8 sys_ustat
@@ -267,8 +276,8 @@ ia32_syscall_table:
 	data8 sys_getpgrp	  /* 65 */
 	data8 sys_setsid
 	data8 sys32_sigaction
-	data8 sys32_ni_syscall
-	data8 sys32_ni_syscall
+	data8 sys_ni_syscall
+	data8 sys_ni_syscall
 	data8 sys_setreuid	/* 16-bit version */	  /* 70 */
 	data8 sys_setregid	/* 16-bit version */
 	data8 sys32_sigsuspend
@@ -283,7 +292,7 @@ ia32_syscall_table:
 	data8 sys32_setgroups16
 	data8 sys32_old_select
 	data8 sys_symlink
-	data8 sys32_ni_syscall
+	data8 sys_ni_syscall
 	data8 sys_readlink	  /* 85 */
 	data8 sys_uselib
 	data8 sys_swapon
@@ -297,7 +306,7 @@ ia32_syscall_table:
 	data8 sys_fchown	/* 16-bit version */	  /* 95 */
 	data8 sys_getpriority
 	data8 sys_setpriority
-	data8 sys32_ni_syscall	  /* old profil syscall holder */
+	data8 sys_ni_syscall	  /* old profil syscall holder */
 	data8 compat_sys_statfs
 	data8 compat_sys_fstatfs	  /* 100 */
 	data8 sys32_ioperm
@@ -308,11 +317,11 @@ ia32_syscall_table:
 	data8 compat_sys_newstat
 	data8 compat_sys_newlstat
 	data8 compat_sys_newfstat
-	data8 sys32_ni_syscall
+	data8 sys_ni_syscall
 	data8 sys32_iopl		  /* 110 */
 	data8 sys_vhangup
-	data8 sys32_ni_syscall		/* used to be sys_idle */
-	data8 sys32_ni_syscall
+	data8 sys_ni_syscall		/* used to be sys_idle */
+	data8 sys_ni_syscall
 	data8 compat_sys_wait4
 	data8 sys_swapoff	  /* 115 */
 	data8 sys32_sysinfo
@@ -323,20 +332,20 @@ ia32_syscall_table:
 	data8 sys_setdomainname
 	data8 sys32_newuname
 	data8 sys32_modify_ldt
-	data8 sys32_ni_syscall	/* adjtimex */
+	data8 sys_ni_syscall	/* adjtimex */
 	data8 sys32_mprotect	  /* 125 */
 	data8 compat_sys_sigprocmask
-	data8 sys32_ni_syscall	/* create_module */
-	data8 sys32_ni_syscall	/* init_module */
-	data8 sys32_ni_syscall	/* delete_module */
-	data8 sys32_ni_syscall	/* get_kernel_syms */  /* 130 */
+	data8 sys_ni_syscall	/* create_module */
+	data8 sys_ni_syscall	/* init_module */
+	data8 sys_ni_syscall	/* delete_module */
+	data8 sys_ni_syscall	/* get_kernel_syms */  /* 130 */
 	data8 sys_quotactl
 	data8 sys_getpgid
 	data8 sys_fchdir
-	data8 sys32_ni_syscall	/* sys_bdflush */
+	data8 sys_ni_syscall	/* sys_bdflush */
 	data8 sys_sysfs		/* 135 */
 	data8 sys32_personality
-	data8 sys32_ni_syscall	  /* for afs_syscall */
+	data8 sys_ni_syscall	  /* for afs_syscall */
 	data8 sys_setfsuid	/* 16-bit version */
 	data8 sys_setfsgid	/* 16-bit version */
 	data8 sys_llseek	  /* 140 */
@@ -365,10 +374,10 @@ ia32_syscall_table:
 	data8 sys_mremap
 	data8 sys_setresuid	/* 16-bit version */
 	data8 sys32_getresuid16	/* 16-bit version */	  /* 165 */
-	data8 sys32_ni_syscall	/* vm86 */
-	data8 sys32_ni_syscall	/* sys_query_module */
+	data8 sys_ni_syscall	/* vm86 */
+	data8 sys_ni_syscall	/* sys_query_module */
 	data8 sys_poll
-	data8 sys32_ni_syscall	/* nfsservctl */
+	data8 sys_ni_syscall	/* nfsservctl */
 	data8 sys_setresgid	  /* 170 */
 	data8 sys32_getresgid16
 	data8 sys_prctl
@@ -387,8 +396,8 @@ ia32_syscall_table:
 	data8 sys_capset	  /* 185 */
 	data8 sys32_sigaltstack
 	data8 sys32_sendfile
-	data8 sys32_ni_syscall		  /* streams1 */
-	data8 sys32_ni_syscall		  /* streams2 */
+	data8 sys_ni_syscall		  /* streams1 */
+	data8 sys_ni_syscall		  /* streams2 */
 	data8 sys32_vfork	  /* 190 */
 	data8 compat_sys_getrlimit
 	data8 sys32_mmap2
@@ -469,10 +478,6 @@ ia32_syscall_table:
 	data8 sys_ni_syscall
 	data8 sys_statfs64
 	data8 sys_fstatfs64
-	data8 sys_ni_syscall
 
-	/*
-	 *  CAUTION: If any system calls are added beyond this point
-	 *	then the check in `arch/ia64/kernel/ivt.S' will have
-	 *	to be modified also.  You've been warned.
-	 */
+	// guard against failures to increase IA32_NR_syscalls
+	.org ia32_syscall_table + 8*IA32_NR_syscalls

arch/ia64/ia32/sys_ia32.c

@@ -2164,19 +2164,6 @@ sys32_ptrace (int request, pid_t pid, unsigned int addr, unsigned int data,
 	return ret;
 }
 
-asmlinkage long sys_ni_syscall(void);
-
-asmlinkage long
-sys32_ni_syscall (int dummy0, int dummy1, int dummy2, int dummy3, int dummy4, int dummy5,
-		  int dummy6, int dummy7, int stack)
-{
-	struct pt_regs *regs = (struct pt_regs *)&stack;
-
-	printk(KERN_WARNING "IA32 syscall #%d issued, maybe we should implement it\n",
-	       (int)regs->r1);
-	return(sys_ni_syscall());
-}
-
 /*
  *  The IA64 maps 4 I/O ports for each 4K page
  */

arch/ia64/kernel/entry.S

@@ -483,34 +483,11 @@ GLOBAL_ENTRY(clone)
 	br.ret.sptk.many rp
 END(clone)
 
-	/*
-	 * We invoke syscall_trace through this intermediate function to
-	 * ensure that the syscall input arguments are not clobbered.  We
-	 * also use it to preserve b6, which contains the syscall entry point.
-	 */
-GLOBAL_ENTRY(invoke_syscall_trace)
-	.prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8)
-	alloc loc1=ar.pfs,8,3,0,0
-	mov loc0=rp
-	.body
-	mov loc2=b6
-	;;
-	br.call.sptk.many rp=syscall_trace
-.ret3:	mov rp=loc0
-	mov ar.pfs=loc1
-	mov b6=loc2
-	br.ret.sptk.many rp
-END(invoke_syscall_trace)
-
 	/*
 	 * Invoke a system call, but do some tracing before and after the call.
 	 * We MUST preserve the current register frame throughout this routine
 	 * because some system calls (such as ia64_execve) directly
 	 * manipulate ar.pfs.
-	 *
-	 * Input:
-	 *	r15 = syscall number
-	 *	b6  = syscall entry point
 	 */
 	.global ia64_strace_leave_kernel
 
@@ -522,21 +499,38 @@ GLOBAL_ENTRY(ia64_trace_syscall)
 	 */
 	nop.m 0
 	nop.i 0
-	br.call.sptk.many rp=invoke_syscall_trace // give parent a chance to catch syscall args
+	br.call.sptk.many rp=syscall_trace // give parent a chance to catch syscall args
 }
-.ret6:	br.call.sptk.many rp=b6			// do the syscall
-strace_check_retval:
+	// the syscall number may have changed, so re-load it and re-calculate the
+	// syscall entry-point:
+	adds r15=PT(R15)+16,sp			// r15 = &pt_regs.r15 (syscall #)
+	;;
+	ld8 r15=[r15]
+	mov r3=NR_syscalls - 1
+	;;
+	adds r15=-1024,r15
+	movl r16=sys_call_table
+	;;
+	shladd r20=r15,3,r16			// r20 = sys_call_table + 8*(syscall-1024)
+	cmp.leu p6,p7=r15,r3
+	;;
+(p6)	ld8 r20=[r20]				// load address of syscall entry point
+(p7)	movl r20=sys_ni_syscall
+	;;
+	mov b6=r20
+	br.call.sptk.many rp=b6			// do the syscall
+.strace_check_retval:
 	cmp.lt p6,p0=r8,r0			// syscall failed?
 	adds r2=PT(R8)+16,sp			// r2 = &pt_regs.r8
 	adds r3=PT(R10)+16,sp			// r3 = &pt_regs.r10
 	mov r10=0
 (p6)	br.cond.sptk strace_error		// syscall failed ->
 	;;					// avoid RAW on r10
-strace_save_retval:
+.strace_save_retval:
 .mem.offset 0,0; st8.spill [r2]=r8		// store return value in slot for r8
 .mem.offset 8,0; st8.spill [r3]=r10		// clear error indication in slot for r10
 ia64_strace_leave_kernel:
-	br.call.sptk.many rp=invoke_syscall_trace // give parent a chance to catch return value
+	br.call.sptk.many rp=syscall_trace // give parent a chance to catch return value
 .rety:	br.cond.sptk ia64_leave_syscall
 
 strace_error:
@@ -548,7 +542,7 @@ strace_error:
 	;;
 (p6)	mov r10=-1
 (p6)	mov r8=r9
-	br.cond.sptk strace_save_retval
+	br.cond.sptk .strace_save_retval
 END(ia64_trace_syscall)
 
 GLOBAL_ENTRY(ia64_ret_from_clone)
@@ -573,7 +567,7 @@ GLOBAL_ENTRY(ia64_ret_from_clone)
 	;;
 	mov r8=0
 	tbit.nz p6,p0=r2,TIF_SYSCALL_TRACE
-(p6)	br.cond.spnt strace_check_retval
+(p6)	br.cond.spnt .strace_check_retval
 	;;					// added stop bits to prevent r8 dependency
 END(ia64_ret_from_clone)
 	// fall through
@@ -726,6 +720,7 @@ GLOBAL_ENTRY(ia64_leave_syscall)
 	mov b6=r22				// restore b6
 	shr.u r18=r19,16	// get byte size of existing "dirty" partition
 (pKStk) br.cond.dpnt.many skip_rbs_switch
+(pNonSys) br.cond.dpnt.many dont_preserve_current_frame
 	br.cond.sptk.many rbs_switch
 END(ia64_leave_syscall)
 
@@ -1334,9 +1329,9 @@ sys_call_table:
 	data8 sys_syslog
 	data8 sys_setitimer
 	data8 sys_getitimer
-	data8 ia64_ni_syscall			// 1120		/* was: ia64_oldstat */
-	data8 ia64_ni_syscall					/* was: ia64_oldlstat */
-	data8 ia64_ni_syscall					/* was: ia64_oldfstat */
+	data8 sys_ni_syscall			// 1120		/* was: ia64_oldstat */
+	data8 sys_ni_syscall					/* was: ia64_oldlstat */
+	data8 sys_ni_syscall					/* was: ia64_oldfstat */
 	data8 sys_vhangup
 	data8 sys_lchown
 	data8 sys_remap_file_pages		// 1125
@@ -1346,16 +1341,16 @@ sys_call_table:
 	data8 sys_setdomainname
 	data8 sys_newuname			// 1130
 	data8 sys_adjtimex
-	data8 ia64_ni_syscall					/* was: ia64_create_module */
+	data8 sys_ni_syscall					/* was: ia64_create_module */
 	data8 sys_init_module
 	data8 sys_delete_module
-	data8 ia64_ni_syscall			// 1135		/* was: sys_get_kernel_syms */
-	data8 ia64_ni_syscall					/* was: sys_query_module */
+	data8 sys_ni_syscall			// 1135		/* was: sys_get_kernel_syms */
+	data8 sys_ni_syscall					/* was: sys_query_module */
 	data8 sys_quotactl
 	data8 sys_bdflush
 	data8 sys_sysfs
 	data8 sys_personality			// 1140
-	data8 ia64_ni_syscall		// sys_afs_syscall
+	data8 sys_ni_syscall		// sys_afs_syscall
 	data8 sys_setfsuid
 	data8 sys_setfsgid
 	data8 sys_getdents
@@ -1473,26 +1468,26 @@ sys_call_table:
 	data8 sys_clock_nanosleep
 	data8 sys_fstatfs64
 	data8 sys_statfs64
-	data8 ia64_ni_syscall
-	data8 ia64_ni_syscall			// 1260
-	data8 ia64_ni_syscall
-	data8 ia64_ni_syscall
-	data8 ia64_ni_syscall
-	data8 ia64_ni_syscall
-	data8 ia64_ni_syscall			// 1265
-	data8 ia64_ni_syscall
-	data8 ia64_ni_syscall
-	data8 ia64_ni_syscall
-	data8 ia64_ni_syscall
-	data8 ia64_ni_syscall			// 1270
-	data8 ia64_ni_syscall
-	data8 ia64_ni_syscall
-	data8 ia64_ni_syscall
-	data8 ia64_ni_syscall
-	data8 ia64_ni_syscall			// 1275
-	data8 ia64_ni_syscall
-	data8 ia64_ni_syscall
-	data8 ia64_ni_syscall
-	data8 ia64_ni_syscall
+	data8 sys_ni_syscall
+	data8 sys_ni_syscall			// 1260
+	data8 sys_ni_syscall
+	data8 sys_ni_syscall
+	data8 sys_ni_syscall
+	data8 sys_ni_syscall
+	data8 sys_ni_syscall			// 1265
+	data8 sys_ni_syscall
+	data8 sys_ni_syscall
+	data8 sys_ni_syscall
+	data8 sys_ni_syscall
+	data8 sys_ni_syscall			// 1270
+	data8 sys_ni_syscall
+	data8 sys_ni_syscall
+	data8 sys_ni_syscall
+	data8 sys_ni_syscall
+	data8 sys_ni_syscall			// 1275
+	data8 sys_ni_syscall
+	data8 sys_ni_syscall
+	data8 sys_ni_syscall
+	data8 sys_ni_syscall
 
 	.org sys_call_table + 8*NR_syscalls	// guard against failures to increase NR_syscalls

arch/ia64/kernel/entry.h

@@ -4,7 +4,7 @@
  * Preserved registers that are shared between code in ivt.S and entry.S.  Be
  * careful not to step on these!
  */
-#define pLvSys		p1	/* set 1 if leave from syscall; otherwise, set 0*/
+#define pLvSys		p1	/* set 1 if leave from syscall; otherwise, set 0 */
 #define pKStk		p2	/* will leave_{kernel,syscall} return to kernel-stacks? */
 #define pUStk		p3	/* will leave_{kernel,syscall} return to user-stacks? */
 #define pSys		p4	/* are we processing a (synchronous) system call? */

arch/ia64/kernel/ivt.S

@@ -42,6 +42,7 @@
 
 #include <asm/asmmacro.h>
 #include <asm/break.h>
+#include <asm/ia32.h>
 #include <asm/kregs.h>
 #include <asm/offsets.h>
 #include <asm/pgtable.h>
@@ -705,13 +706,14 @@ ENTRY(break_fault)
 	movl r2=ia64_ret_from_syscall
 	;;
 	shladd r20=r15,3,r16			// r20 = sys_call_table + 8*(syscall-1024)
-	cmp.geu p0,p7=r3,r15			// (syscall > 0 && syscall < 1024 + NR_syscalls) ?
+	cmp.leu p6,p7=r15,r3			// (syscall > 0 && syscall < 1024 + NR_syscalls) ?
 	mov rp=r2				// set the real return addr
 	;;
-(p7)	add r20=(__NR_ni_syscall-1024)*8,r16	// force __NR_ni_syscall
+(p6)	ld8 r20=[r20]				// load address of syscall entry point
+(p7)	movl r20=sys_ni_syscall
+
 	add r2=TI_FLAGS+IA64_TASK_SIZE,r13
 	;;
-	ld8 r20=[r20]				// load address of syscall entry point
 	ld4 r2=[r2]				// r2 = current_thread_info()->flags
 	;;
 	tbit.z p8,p0=r2,TIF_SYSCALL_TRACE
@@ -1513,7 +1515,7 @@ ENTRY(dispatch_to_ia32_handler)
 	alloc r15=ar.pfs,0,0,6,0	// must first in an insn group
 	;;
 	ld4 r8=[r14],8		// r8 == eax (syscall number)
-	mov r15=270		// number of entries in ia32 system call table
+	mov r15=IA32_NR_syscalls
 	;;
 	cmp.ltu.unc p6,p7=r8,r15
 	ld4 out1=[r14],8	// r9 == ecx

arch/ia64/kernel/perfmon_default_smpl.c

@@ -114,7 +114,7 @@ default_handler(struct task_struct *task, void *buf, pfm_ovfl_arg_t *arg, struct
 	pfm_default_smpl_hdr_t *hdr;
 	pfm_default_smpl_entry_t *ent;
 	void *cur, *last;
-	unsigned long *e;
+	unsigned long *e, entry_size;
 	unsigned int npmds, i;
 	unsigned char ovfl_pmd;
 	unsigned char ovfl_notify;
@@ -131,8 +131,7 @@ default_handler(struct task_struct *task, void *buf, pfm_ovfl_arg_t *arg, struct
 	ovfl_notify = arg->ovfl_notify;
 
 	/*
-	 * check for space against largest possibly entry.
-	 * We may waste space at the end of the buffer.
+	 * precheck for sanity
 	 */
 	if ((last - cur) < PFM_DEFAULT_MAX_ENTRY_SIZE) goto full;
 
@@ -142,6 +141,8 @@ default_handler(struct task_struct *task, void *buf, pfm_ovfl_arg_t *arg, struct
 
 	prefetch(arg->smpl_pmds_values);
 
+	entry_size = sizeof(*ent) + (npmds << 3);
+
 	/* position for first pmd */
 	e = (unsigned long *)(ent+1);
 
@@ -191,7 +192,13 @@ default_handler(struct task_struct *task, void *buf, pfm_ovfl_arg_t *arg, struct
 	/*
 	 * update position for next entry
 	 */
-	hdr->hdr_cur_offs += sizeof(*ent) + (npmds << 3);
+	hdr->hdr_cur_offs += entry_size;
+	cur               += entry_size;
+
+	/*
+	 * post check to avoid losing the last sample
+	 */
+	if ((last - cur) < PFM_DEFAULT_MAX_ENTRY_SIZE) goto full;
 
 	/*
 	 * keep same ovfl_pmds, ovfl_notify

arch/ia64/kernel/ptrace.c

@@ -29,6 +29,11 @@
 #include <asm/perfmon.h>
 #endif
 
+#include "entry.h"
+
+#define p4	(1UL << 4)	/* for pSys (see entry.h) */
+#define p5	(1UL << 5)	/* for pNonSys (see entry.h) */
+
 /*
  * Bits in the PSR that we allow ptrace() to change:
  *	be, up, ac, mfl, mfh (the user mask; five bits total)
@@ -51,6 +56,14 @@
 # define dprintk(format...)
 #endif
 
+/* Return TRUE if PT was created due to kernel-entry via a system-call.  */
+
+static inline int
+in_syscall (struct pt_regs *pt)
+{
+	return (long) pt->cr_ifs >= 0;
+}
+
 /*
  * Collect the NaT bits for r1-r31 from scratch_unat and return a NaT
  * bitset where bit i is set iff the NaT bit of register i is set.
@@ -272,7 +285,7 @@ put_rnat (struct task_struct *task, struct switch_stack *sw,
 	ubspstore = (unsigned long *) pt->ar_bspstore;
 
 	urbs_kargs = urbs_end;
-	if ((long)pt->cr_ifs >= 0) {
+	if (in_syscall(pt)) {
 		/*
 		 * If entered via syscall, don't allow user to set rnat bits
 		 * for syscall args.
@@ -331,6 +344,13 @@ put_rnat (struct task_struct *task, struct switch_stack *sw,
 		*rnat1_kaddr = ((*rnat1_kaddr & ~m) | (rnat1 & m));
 }
 
+static inline int
+on_kernel_rbs (unsigned long addr, unsigned long bspstore, unsigned long urbs_end)
+{
+	return (addr >= bspstore
+		&& addr <= (unsigned long) ia64_rse_rnat_addr((unsigned long *) urbs_end));
+}
+
 /*
  * Read a word from the user-level backing store of task CHILD.  ADDR is the user-level
  * address to read the word from, VAL a pointer to the return value, and USER_BSP gives
@@ -355,7 +375,7 @@ ia64_peek (struct task_struct *child, struct switch_stack *child_stack, unsigned
 	child_regs = ia64_task_regs(child);
 	bspstore = (unsigned long *) child_regs->ar_bspstore;
 	krbs = (unsigned long *) child + IA64_RBS_OFFSET/8;
-	if (laddr >= bspstore && laddr <= ia64_rse_rnat_addr(urbs_end)) {
+	if (on_kernel_rbs(addr, (unsigned long) bspstore, (unsigned long) urbs_end)) {
 		/*
 		 * Attempt to read the RBS in an area that's actually on the kernel RBS =>
 		 * read the corresponding bits in the kernel RBS.
@@ -406,7 +426,7 @@ ia64_poke (struct task_struct *child, struct switch_stack *child_stack, unsigned
 	child_regs = ia64_task_regs(child);
 	bspstore = (unsigned long *) child_regs->ar_bspstore;
 	krbs = (unsigned long *) child + IA64_RBS_OFFSET/8;
-	if (laddr >= bspstore && laddr <= ia64_rse_rnat_addr(urbs_end)) {
+	if (on_kernel_rbs(addr, (unsigned long) bspstore, (unsigned long) urbs_end)) {
 		/*
 		 * Attempt to write the RBS in an area that's actually on the kernel RBS
 		 * => write the corresponding bits in the kernel RBS.
@@ -443,7 +463,7 @@ ia64_get_user_rbs_end (struct task_struct *child, struct pt_regs *pt, unsigned l
 	ndirty = ia64_rse_num_regs(krbs, krbs + (pt->loadrs >> 19));
 	cfm = pt->cr_ifs & ~(1UL << 63);
 
-	if ((long) pt->cr_ifs >= 0) {
+	if (in_syscall(pt)) {
 		/*
 		 * If bit 63 of cr.ifs is cleared, the kernel was entered via a system
 		 * call and we need to recover the CFM that existed on entry to the
@@ -483,134 +503,80 @@ ia64_sync_user_rbs (struct task_struct *child, struct switch_stack *sw,
 	return 0;
 }
 
-/*
- * Simulate user-level "flushrs".  Note: we can't just add pt->loadrs>>16 to
- * pt->ar_bspstore because the kernel backing store and the user-level backing store may
- * have different alignments (and therefore a different number of intervening rnat slots).
- */
-static void
-user_flushrs (struct task_struct *task, struct pt_regs *pt)
+static inline int
+thread_matches (struct task_struct *thread, unsigned long addr)
 {
-	unsigned long *krbs;
-	long ndirty;
+	unsigned long thread_rbs_end;
+	struct pt_regs *thread_regs;
 
-	krbs = (unsigned long *) task + IA64_RBS_OFFSET/8;
-	ndirty = ia64_rse_num_regs(krbs, krbs + (pt->loadrs >> 19));
-
-	pt->ar_bspstore = (unsigned long) ia64_rse_skip_regs((unsigned long *) pt->ar_bspstore,
-							     ndirty);
-	pt->loadrs = 0;
-}
-
-static inline void
-sync_user_rbs_one_thread (struct task_struct *p, int make_writable)
-{
-	struct switch_stack *sw;
-	unsigned long urbs_end;
-	struct pt_regs *pt;
-
-	sw = (struct switch_stack *) (p->thread.ksp + 16);
-	pt = ia64_task_regs(p);
-	urbs_end = ia64_get_user_rbs_end(p, pt, NULL);
-	ia64_sync_user_rbs(p, sw, pt->ar_bspstore, urbs_end);
-	if (make_writable)
-		user_flushrs(p, pt);
-}
-
-struct task_list {
-	struct task_list *next;
-	struct task_struct *task;
-};
-
-#ifdef CONFIG_SMP
-
-static inline void
-collect_task (struct task_list **listp, struct task_struct *p, int make_writable)
-{
-	struct task_list *e;
-
-	e = kmalloc(sizeof(*e), GFP_KERNEL);
-	if (!e)
-		/* oops, can't collect more: finish at least what we collected so far... */
-		return;
-
-	get_task_struct(p);
-	e->task = p;
-	e->next = *listp;
-	*listp = e;
-}
+	if (ptrace_check_attach(thread, 0) < 0)
+		/*
+		 * If the thread is not in an attachable state, we'll ignore it.
+		 * The net effect is that if ADDR happens to overlap with the
+		 * portion of the thread's register backing store that is
+		 * currently residing on the thread's kernel stack, then ptrace()
+		 * may end up accessing a stale value.  But if the thread isn't
+		 * stopped, that's a problem anyhow, so we're doing as well as we
+		 * can...
+		 */
+		return 0;
 
-static inline struct task_list *
-finish_task (struct task_list *list, int make_writable)
-{
-	struct task_list *next = list->next;
+	thread_regs = ia64_task_regs(thread);
+	thread_rbs_end = ia64_get_user_rbs_end(thread, thread_regs, NULL);
+	if (!on_kernel_rbs(addr, thread_regs->ar_bspstore, thread_rbs_end))
+		return 0;
 
-	sync_user_rbs_one_thread(list->task, make_writable);
-	put_task_struct(list->task);
-	kfree(list);
-	return next;
+	return 1;	/* looks like we've got a winner */
 }
 
-#else
-# define collect_task(list, p, make_writable)	sync_user_rbs_one_thread(p, make_writable)
-# define finish_task(list, make_writable)	(NULL)
-#endif
-
 /*
- * Synchronize the RSE backing store of CHILD and all tasks that share the address space
- * with it.  CHILD_URBS_END is the address of the end of the register backing store of
- * CHILD.  If MAKE_WRITABLE is set, a user-level "flushrs" is simulated such that the VM
- * can be written via ptrace() and the tasks will pick up the newly written values.  It
- * would be OK to unconditionally simulate a "flushrs", but this would be more intrusive
- * than strictly necessary (e.g., it would make it impossible to obtain the original value
- * of ar.bspstore).
+ * GDB apparently wants to be able to read the register-backing store of any thread when
+ * attached to a given process.  If we are peeking or poking an address that happens to
+ * reside in the kernel-backing store of another thread, we need to attach to that thread,
+ * because otherwise we end up accessing stale data.
+ *
+ * task_list_lock must be read-locked before calling this routine!
  */
-static void
-threads_sync_user_rbs (struct task_struct *child, unsigned long child_urbs_end, int make_writable)
+static struct task_struct *
+find_thread_for_addr (struct task_struct *child, unsigned long addr)
 {
-	struct switch_stack *sw;
 	struct task_struct *g, *p;
 	struct mm_struct *mm;
-	struct pt_regs *pt;
-	long multi_threaded;
+	int mm_users;
 
-	task_lock(child);
-	{
-		mm = child->mm;
-		multi_threaded = mm && (atomic_read(&mm->mm_users) > 1);
-	}
-	task_unlock(child);
+	if (!(mm = get_task_mm(child)))
+		return child;
+
+	mm_users = atomic_read(&mm->mm_users) - 1;	/* -1 because of our get_task_mm()... */
+	if (mm_users <= 1)
+		goto out;		/* not multi-threaded */
 
-	if (!multi_threaded) {
-		sw = (struct switch_stack *) (child->thread.ksp + 16);
-		pt = ia64_task_regs(child);
-		ia64_sync_user_rbs(child, sw, pt->ar_bspstore, child_urbs_end);
-		if (make_writable)
-			user_flushrs(child, pt);
-	} else {
 	/*
-		 * Note: we can't call ia64_sync_user_rbs() while holding the
-		 * tasklist_lock because that may cause a dead-lock: ia64_sync_user_rbs()
-		 * may indirectly call tlb_flush_all(), which triggers an IPI.
-		 * Furthermore, tasklist_lock is acquired by fork() with interrupts
-		 * disabled, so with the right timing, the IPI never completes, hence
-		 * tasklist_lock never gets released, hence fork() never completes...
+	 * First, traverse the child's thread-list.  Good for scalability with
+	 * NPTL-threads.
 	 */
-		struct task_list *list = NULL;
+	p = child;
+	do {
+		if (thread_matches(p, addr)) {
+			child = p;
+			goto out;
+		}
+		if (mm_users-- <= 1)
+			goto out;
+	} while ((p = next_thread(p)) != child);
 
-		read_lock(&tasklist_lock);
-		{
 	do_each_thread(g, p) {
-				if (p->mm == mm && p->state != TASK_RUNNING)
-					collect_task(&list, p, make_writable);
-			} while_each_thread(g, p);
-		}
-		read_unlock(&tasklist_lock);
+		if (child->mm != mm)
+			continue;
 
-		while (list)
-			list = finish_task(list, make_writable);
+		if (thread_matches(p, addr)) {
+			child = p;
+			goto out;
 		}
-	child->thread.flags |= IA64_THREAD_KRBS_SYNCED;	/* set the flag in the child thread only */
+	} while_each_thread(g, p);
+  out:
+	mmput(mm);
+	return child;
 }
 
 /*
@@ -668,12 +634,40 @@ access_fr (struct unw_frame_info *info, int regnum, int hi, unsigned long *data,
 	return ret;
 }
 
+/*
+ * Change the machine-state of CHILD such that it will return via the normal
+ * kernel exit-path, rather than the syscall-exit path.
+ */
+static void
+convert_to_non_syscall (struct task_struct *child, struct pt_regs  *pt, unsigned long cfm)
+{
+	struct unw_frame_info info, prev_info;
+	unsigned long ip, pr;
+
+	unw_init_from_blocked_task(&info, child);
+	while (1) {
+		prev_info = info;
+		if (unw_unwind(&info) < 0)
+			return;
+		if (unw_get_rp(&info, &ip) < 0)
+			return;
+		if (ip < FIXADDR_USER_END)
+			break;
+	}
+
+	unw_get_pr(&prev_info, &pr);
+	pr &= ~pSys;
+	pr |= pNonSys;
+	unw_set_pr(&prev_info, pr);
+
+	pt->cr_ifs = (1UL << 63) | cfm;
+}
+
 static int
 access_uarea (struct task_struct *child, unsigned long addr, unsigned long *data, int write_access)
 {
-	unsigned long *ptr, regnum, urbs_end, rnat_addr;
+	unsigned long *ptr, regnum, urbs_end, rnat_addr, cfm;
 	struct switch_stack *sw;
-	struct unw_frame_info info;
 	struct pt_regs *pt;
 
 	pt = ia64_task_regs(child);
@@ -778,13 +772,30 @@ access_uarea (struct task_struct *child, unsigned long addr, unsigned long *data
 			 * By convention, we use PT_AR_BSP to refer to the end of the user-level
 			 * backing store.  Use ia64_rse_skip_regs(PT_AR_BSP, -CFM.sof) to get
 			 * the real value of ar.bsp at the time the kernel was entered.
+			 *
+			 * Furthermore, when changing the contents of PT_AR_BSP (or
+			 * PT_CFM) we MUST copy any users-level stacked registers that are
+			 * stored on the kernel stack back to user-space because
+			 * otherwise, we might end up clobbering kernel stacked registers.
+			 * Also, if this happens while the task is blocked in a system
+			 * call, which convert the state such that the non-system-call
+			 * exit path is used.  This ensures that the proper state will be
+			 * picked up when resuming execution.  However, it *also* means
+			 * that once we write PT_AR_BSP/PT_CFM, it won't be possible to
+			 * modify the syscall arguments of the pending system call any
+			 * longer.  This shouldn't be an issue because modifying
+			 * PT_AR_BSP/PT_CFM generally implies that we're either abandoning
+			 * the pending system call or that we defer it's re-execution
+			 * (e.g., due to GDB doing an inferior function call).
 			 */
-			urbs_end = ia64_get_user_rbs_end(child, pt, NULL);
+			urbs_end = ia64_get_user_rbs_end(child, pt, &cfm);
 			if (write_access) {
 				if (*data != urbs_end) {
 					if (ia64_sync_user_rbs(child, sw,
 							       pt->ar_bspstore, urbs_end) < 0)
 						return -1;
+					if (in_syscall(pt))
+						convert_to_non_syscall(child, pt, cfm);
 					/* simulate user-level write of ar.bsp: */
 					pt->loadrs = 0;
 					pt->ar_bspstore = *data;
@@ -794,27 +805,19 @@ access_uarea (struct task_struct *child, unsigned long addr, unsigned long *data
 			return 0;
 
 		      case PT_CFM:
-			if ((long) pt->cr_ifs < 0) {
-				if (write_access)
+			urbs_end = ia64_get_user_rbs_end(child, pt, &cfm);
+			if (write_access) {
+				if (((cfm ^ *data) & 0x3fffffffffU) != 0) {
+					if (ia64_sync_user_rbs(child, sw,
+							       pt->ar_bspstore, urbs_end) < 0)
+						return -1;
+					if (in_syscall(pt))
+						convert_to_non_syscall(child, pt, cfm);
 					pt->cr_ifs = ((pt->cr_ifs & ~0x3fffffffffUL)
 						      | (*data & 0x3fffffffffUL));
-				else
-					*data = pt->cr_ifs & 0x3fffffffffUL;
-			} else {
-				/* kernel was entered through a system call */
-				unsigned long cfm;
-
-				unw_init_from_blocked_task(&info, child);
-				if (unw_unwind_to_user(&info) < 0)
-					return -1;
-
-				unw_get_cfm(&info, &cfm);
-				if (write_access)
-					unw_set_cfm(&info, ((cfm & ~0x3fffffffffU)
-							    | (*data & 0x3fffffffffUL)));
-				else
-					*data = cfm;
 				}
+			} else
+				*data = cfm;
 			return 0;
 
 		      case PT_CR_IPSR:
@@ -1240,9 +1243,6 @@ ptrace_disable (struct task_struct *child)
 	/* make sure the single step/take-branch tra bits are not set: */
 	child_psr->ss = 0;
 	child_psr->tb = 0;
-
-	/* Turn off flag indicating that the KRBS is sync'd with child's VM: */
-	child->thread.flags &= ~IA64_THREAD_KRBS_SYNCED;
 }
 
 asmlinkage long
@@ -1250,7 +1250,7 @@ sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data,
 	    long arg4, long arg5, long arg6, long arg7, long stack)
 {
 	struct pt_regs *pt, *regs = (struct pt_regs *) &stack;
-	unsigned long urbs_end;
+	unsigned long urbs_end, peek_or_poke;
 	struct task_struct *child;
 	struct switch_stack *sw;
 	long ret;
@@ -1269,13 +1269,18 @@ sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data,
 		goto out;
 	}
 
+	peek_or_poke = (request == PTRACE_PEEKTEXT || request == PTRACE_PEEKDATA
+			|| request == PTRACE_POKETEXT || request == PTRACE_POKEDATA);
 	ret = -ESRCH;
 	read_lock(&tasklist_lock);
 	{
 		child = find_task_by_pid(pid);
-		if (child)
+		if (child) {
+			if (peek_or_poke)
+				child = find_thread_for_addr(child, addr);
 			get_task_struct(child);
 		}
+	}
 	read_unlock(&tasklist_lock);
 	if (!child)
 		goto out;
@@ -1299,10 +1304,6 @@ sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data,
 	      case PTRACE_PEEKTEXT:
 	      case PTRACE_PEEKDATA:		/* read word at location addr */
 		urbs_end = ia64_get_user_rbs_end(child, pt, NULL);
-
-		if (!(child->thread.flags & IA64_THREAD_KRBS_SYNCED))
-			threads_sync_user_rbs(child, urbs_end, 0);
-
 		ret = ia64_peek(child, sw, urbs_end, addr, &data);
 		if (ret == 0) {
 			ret = data;
@@ -1313,9 +1314,6 @@ sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data,
 	      case PTRACE_POKETEXT:
 	      case PTRACE_POKEDATA:		/* write the word at location addr */
 		urbs_end = ia64_get_user_rbs_end(child, pt, NULL);
-		if (!(child->thread.flags & IA64_THREAD_KRBS_SYNCED))
-			threads_sync_user_rbs(child, urbs_end, 1);
-
 		ret = ia64_poke(child, sw, urbs_end, addr, data);
 		goto out_tsk;
 
@@ -1359,9 +1357,6 @@ sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data,
 		ia64_psr(pt)->ss = 0;
 		ia64_psr(pt)->tb = 0;
 
-		/* Turn off flag indicating that the KRBS is sync'd with child's VM: */
-		child->thread.flags &= ~IA64_THREAD_KRBS_SYNCED;
-
 		wake_up_process(child);
 		ret = 0;
 		goto out_tsk;
@@ -1380,9 +1375,6 @@ sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data,
 		ia64_psr(pt)->ss = 0;
 		ia64_psr(pt)->tb = 0;
 
-		/* Turn off flag indicating that the KRBS is sync'd with child's VM: */
-		child->thread.flags &= ~IA64_THREAD_KRBS_SYNCED;
-
 		wake_up_process(child);
 		ret = 0;
 		goto out_tsk;
@@ -1401,9 +1393,6 @@ sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data,
 		}
 		child->exit_code = data;
 
-		/* Turn off flag indicating that the KRBS is sync'd with child's VM: */
-		child->thread.flags &= ~IA64_THREAD_KRBS_SYNCED;
-
 		/* give it a chance to run. */
 		wake_up_process(child);
 		ret = 0;
@@ -1432,7 +1421,9 @@ sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data,
 	return ret;
 }
 
-void
+/* "asmlinkage" so the input arguments are preserved... */
+
+asmlinkage void
 syscall_trace (void)
 {
 	if (!test_thread_flag(TIF_SYSCALL_TRACE))

arch/ia64/kernel/signal.c

@@ -538,6 +538,19 @@ ia64_do_signal (sigset_t *oldset, struct sigscratch *scr, long in_syscall)
 	if (!oldset)
 		oldset = &current->blocked;
 
+	/*
+	 * This only loops in the rare cases of handle_signal() failing, in which case we
+	 * need to push through a forced SIGSEGV.
+	 */
+	while (1) {
+		int signr = get_signal_to_deliver(&info, &scr->pt, NULL);
+
+		/*
+		 * get_signal_to_deliver() may have run a debugger (via notify_parent())
+		 * and the debugger may have modified the state (e.g., to arrange for an
+		 * inferior call), thus it's important to check for restarting _after_
+		 * get_signal_to_deliver().
+		 */
 		if (IS_IA32_PROCESS(&scr->pt)) {
 			if (in_syscall) {
 				if (errno >= 0)
@@ -554,15 +567,12 @@ ia64_do_signal (sigset_t *oldset, struct sigscratch *scr, long in_syscall)
 			 */
 			restart = 0;
 
-	while (1) {
-		int signr = get_signal_to_deliver(&info, &scr->pt, NULL);
-
 		if (signr <= 0)
 			break;
 
 		ka = &current->sighand->action[signr - 1];
 
-		if (restart) {
+		if (unlikely(restart)) {
 			switch (errno) {
 			      case ERESTART_RESTARTBLOCK:
 			      case ERESTARTNOHAND:
@@ -582,6 +592,7 @@ ia64_do_signal (sigset_t *oldset, struct sigscratch *scr, long in_syscall)
 					scr->pt.cr_iip -= 2;
 				} else
 					ia64_decrement_ip(&scr->pt);
+				restart = 0; /* don't restart twice if handle_signal() fails... */
 			}
 		}
 

arch/ia64/kernel/traps.c

@@ -215,21 +215,6 @@ ia64_bad_break (unsigned long break_num, struct pt_regs *regs)
 	force_sig_info(sig, &siginfo, current);
 }
 
-/*
- * Unimplemented system calls.  This is called only for stuff that
- * we're supposed to implement but haven't done so yet.  Everything
- * else goes to sys_ni_syscall.
- *
- * XXX Remove this for v2.6.1.
- */
-asmlinkage long
-ia64_ni_syscall (unsigned long arg0, unsigned long arg1, unsigned long arg2, unsigned long arg3,
-		 unsigned long arg4, unsigned long arg5, unsigned long arg6, unsigned long arg7,
-		 unsigned long stack)
-{
-	return -ENOSYS;
-}
-
 /*
  * disabled_fph_fault() is called when a user-level process attempts to access f32..f127
  * and it doesn't own the fp-high register partition.  When this happens, we save the

include/asm-ia64/ia32.h

@@ -6,7 +6,11 @@
 #include <asm/ptrace.h>
 #include <asm/signal.h>
 
-#ifdef CONFIG_IA32_SUPPORT
+#define IA32_NR_syscalls		270 /* length of syscall table */
+
+#ifndef __ASSEMBLY__
+
+# ifdef CONFIG_IA32_SUPPORT
 
 extern void ia32_cpu_init (void);
 extern void ia32_boot_gdt_init (void);
@@ -15,10 +19,12 @@ extern int ia32_exception (struct pt_regs *regs, unsigned long isr);
 extern int ia32_intercept (struct pt_regs *regs, unsigned long isr);
 extern int ia32_clone_tls (struct task_struct *child, struct pt_regs *childregs);
 
-#endif /* !CONFIG_IA32_SUPPORT */
+# endif /* !CONFIG_IA32_SUPPORT */
 
 /* Declare this unconditionally, so we don't get warnings for unreachable code.  */
 extern int ia32_setup_frame1 (int sig, struct k_sigaction *ka, siginfo_t *info,
 			      sigset_t *set, struct pt_regs *regs);
 
+#endif /* !__ASSEMBLY__ */
+
 #endif /* _ASM_IA64_IA32_H */

include/asm-ia64/processor.h

@@ -64,7 +64,7 @@
 #define IA64_THREAD_PM_VALID	(__IA64_UL(1) << 2)	/* performance registers valid? */
 #define IA64_THREAD_UAC_NOPRINT	(__IA64_UL(1) << 3)	/* don't log unaligned accesses */
 #define IA64_THREAD_UAC_SIGBUS	(__IA64_UL(1) << 4)	/* generate SIGBUS on unaligned acc. */
-#define IA64_THREAD_KRBS_SYNCED	(__IA64_UL(1) << 5)	/* krbs synced with process vm? */
+							/* bit 5 is currently unused */
 #define IA64_THREAD_FPEMU_NOPRINT (__IA64_UL(1) << 6)	/* don't log any fpswa faults */
 #define IA64_THREAD_FPEMU_SIGFPE  (__IA64_UL(1) << 7)	/* send a SIGFPE for fpswa faults */
 #define IA64_THREAD_XSTACK	(__IA64_UL(1) << 8)	/* stack executable by default? */