[PATCH] HPUX emulation updates

Build fixes, PA64 fixes, some new hpux syscalls, VFS fixes.

arch/parisc/hpux/Makefile

 #
-# Makefile for the linux kernel.
+# Makefile for HPUX emulation
 #
 
 obj-y := entry_hpux.o gate.o wrappers.o fs.o ioctl.o sys_hpux.o
-
-EXTRA_AFLAGS := -traditional
-
-include $(TOPDIR)/Rules.make

arch/parisc/hpux/fs.c

@@ -34,8 +34,7 @@ int hpux_execve(struct pt_regs *regs)
 }
 
 struct hpux_dirent {
-	long	d_off_pad; /* we only have a 32-bit off_t */
-	long	d_off;
+	loff_t	d_off;
 	ino_t	d_ino;
 	short	d_reclen;
 	short	d_namlen;
@@ -52,7 +51,8 @@ struct getdents_callback {
 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char *) (de)))
 #define ROUND_UP(x) (((x)+sizeof(long)-1) & ~(sizeof(long)-1))
 
-static int filldir(void * __buf, const char * name, int namlen, loff_t offset, ino_t ino)
+static int filldir(void * __buf, const char * name, int namlen, loff_t offset,
+		ino_t ino, unsigned d_type)
 {
 	struct hpux_dirent * dirent;
 	struct getdents_callback * buf = (struct getdents_callback *) __buf;
@@ -96,7 +96,7 @@ int hpux_getdents(unsigned int fd, struct hpux_dirent *dirent, unsigned int coun
 	buf.count = count;
 	buf.error = 0;
 
-	error = vfs_readdir(file, &buf, filldir);
+	error = vfs_readdir(file, filldir, &buf);
 	if (error < 0)
 		goto out_putf;
 	error = buf.error;
@@ -139,7 +139,7 @@ static int cp_hpux_stat(struct kstat *stat, struct hpux_stat64 *statbuf)
 	return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
 }
 
-long hpux_stat64(const char *path, struct hpux_stat64 *buf)
+long hpux_stat64(char *filename, struct hpux_stat64 *statbuf)
 {
 	struct kstat stat;
 	int error = vfs_stat(filename, &stat);

arch/parisc/hpux/gate.S

-/* ------------------------------------------------------------------------------
+/*
  *
- * Linux/PARISC Project (http://www.thepuffingroup.com/parisc)
+ * Linux/PARISC Project (http://www.parisc-linux.org/)
  *
  * System call entry code Copyright (c) Matthew Wilcox 1999 <willy@bofh.ai>
  * Licensed under the GNU GPL.
@@ -8,14 +8,23 @@
  * sorry about the wall, puffin..
  */
 
-#define __ASSEMBLY__
 #include <asm/assembly.h>
-#include <asm/offset.h>
+#include <asm/offsets.h>
 #include <asm/unistd.h>
 #include <asm/errno.h>
 
+#ifdef __LP64__
+	.level          2.0w
+#else
+	.level		1.1
+#endif
 	.text
 
+#ifdef __LP64__
+#define FRAME_SIZE	128
+#else
+#define FRAME_SIZE	64
+#endif
 	.import hpux_call_table
 	.import hpux_syscall_exit,code
 	.export hpux_gateway_page
@@ -23,35 +32,70 @@
 	.align 4096
 hpux_gateway_page:
 	nop
-	mfsp	%sr7,%r1			;! we must set sr3 to the space
-	mtsp	%r1,%sr3			;! of the user before the gate
 #ifdef __LP64__
 #warning NEEDS WORK for 64-bit
 #endif
-	ldw	-64(%r30), %r28			;! 8th argument
+	ldw     -64(%r30), %r29                 ;! 8th argument
 	ldw	-60(%r30), %r19			;! 7th argument
 	ldw	-56(%r30), %r20			;! 6th argument
 	ldw	-52(%r30), %r21			;! 5th argument
-	gate	.+8, %r0			;! become privileged
-	mtsp	%r0,%sr4			;! get kernel space into sr4
-	mtsp	%r0,%sr5			;! get kernel space into sr5
-	mtsp	%r0,%sr6			;! get kernel space into sr6
-	mtsp	%r0,%sr7			;! get kernel space into sr7
-	mfctl	%cr30,%r1			;! get the kernel task ptr
-	mtctl	%r0,%cr30			;! zero it (flag)
-	STREG	%r30,TASK_PT_GR30(%r1)		;! preserve userspace sp
-	STREG	%r2,TASK_PT_GR2(%r1)		;! preserve rp
-	STREG	%r27,TASK_PT_GR27(%r1)		;! user dp
-	STREG	%r31,TASK_PT_GR31(%r1)		;! preserve syscall return ptr
+	gate	.+8, %r0			/* become privileged */
+	mtsp	%r0,%sr4			/* get kernel space into sr4 */
+	mtsp	%r0,%sr5			/* get kernel space into sr5 */
+	mtsp	%r0,%sr6			/* get kernel space into sr6 */
+	mfsp    %sr7,%r1                        /* save user sr7 */
+	mtsp    %r1,%sr3                        /* and store it in sr3 */
+
+	mtctl   %r30,%cr28
+	mfctl   %cr30,%r1
+	xor     %r1,%r30,%r30                   /* ye olde xor trick */
+	xor     %r1,%r30,%r1
+	xor     %r1,%r30,%r30
+	ldo     TASK_SZ_ALGN+FRAME_SIZE(%r30),%r30  /* set up kernel stack */
+
+	/* N.B.: It is critical that we don't set sr7 to 0 until r30
+	 *       contains a valid kernel stack pointer. It is also
+	 *       critical that we don't start using the kernel stack
+	 *       until after sr7 has been set to 0.
+	 */
+
+	mtsp	%r0,%sr7			/* get kernel space into sr7 */
+	STREG   %r1,TASK_PT_GR30-TASK_SZ_ALGN-FRAME_SIZE(%r30) /* save usp */
+	ldo     -TASK_SZ_ALGN-FRAME_SIZE(%r30),%r1   /* get task ptr in %r1 */
+
+	/* Save some registers for sigcontext and potential task
+	   switch (see entry.S for the details of which ones are
+	   saved/restored).  TASK_PT_PSW is zeroed so we can see whether
+	   a process is on a syscall or not.  For an interrupt the real
+	   PSW value is stored.  This is needed for gdb and sys_ptrace. */
+	STREG	%r0,  TASK_PT_PSW(%r1)
+	STREG	%r2,  TASK_PT_GR2(%r1)		/* preserve rp */
+	STREG   %r19, TASK_PT_GR19(%r1)         /* 7th argument */
+	STREG   %r20, TASK_PT_GR20(%r1)         /* 6th argument */
+	STREG   %r21, TASK_PT_GR21(%r1)         /* 5th argument */
+	STREG   %r22, TASK_PT_GR22(%r1)         /* syscall # */
+	STREG	%r23, TASK_PT_GR23(%r1)		/* 4th argument */
+	STREG	%r24, TASK_PT_GR24(%r1)		/* 3rd argument */
+	STREG	%r25, TASK_PT_GR25(%r1)		/* 2nd argument */
+	STREG	%r26, TASK_PT_GR26(%r1)	 	/* 1st argument */
+	STREG	%r27, TASK_PT_GR27(%r1)		/* user dp */
+	STREG   %r28, TASK_PT_GR28(%r1)         /* return value 0 */
+	STREG   %r28, TASK_PT_ORIG_R28(%r1)     /* return value 0 (saved for signals) */
+	STREG   %r29, TASK_PT_GR29(%r1)         /* 8th argument */
+	STREG	%r31, TASK_PT_GR31(%r1)		/* preserve syscall return ptr */
+	
+	ldo	TASK_PT_FR0(%r1), %r27		/* save fpregs from the kernel */
+	save_fp	%r27				/* or potential task switch  */
 
-	loadgp					;! setup kernel dp
+	mfctl	%cr11, %r27			/* i.e. SAR */
+	STREG	%r27, TASK_PT_SAR(%r1)
 
-	ldo	TASK_SZ_ALGN+64(%r1),%r30	;! set up kernel stack
+	loadgp
 
 	stw	%r21, -52(%r30)			;! 5th argument
 	stw	%r20, -56(%r30)			;! 6th argument
 	stw	%r19, -60(%r30)			;! 7th argument
-	stw	%r28, -64(%r30)			;! 8th argument
+	stw     %r29, -64(%r30)                 ;! 8th argument
 
 	ldil	L%hpux_call_table, %r21
 	ldo	R%hpux_call_table(%r21), %r21

arch/parisc/hpux/ioctl.c

@@ -19,6 +19,7 @@
  *   TIOCSPGRP
  */
 
+#include <linux/sched.h>
 #include <linux/smp_lock.h>
 #include <asm/errno.h>
 #include <asm/ioctl.h>
@@ -54,10 +55,6 @@ int hpux_ioctl(int fd, unsigned long cmd, unsigned long arg)
 	case 't':
 		result = hpux_ioctl_t(fd, cmd, arg);
 		break;
-	default:
-		/* If my mother ever sees this, I hope she disowns me.
-		 * Take this out after NYLWE. */
-		result = sys_ioctl(fd, cmd, arg);
 	}
 	return result;
 }

arch/parisc/hpux/wrappers.S

-/*------------------------------------------------------------------------------
- * Native PARISC/Linux Project (http://www.puffingroup.com/parisc)
+/*
+ * Linux/PARISC Project (http://www.parisc-linux.org/)
  *
  * HP-UX System Call Wrapper routines and System Call Return Path
  *
@@ -24,12 +24,11 @@
 #warning Must be changed for PA64
 #endif
 
-#include <asm/offset.h>
+#include <asm/offsets.h>
 
 	.level		1.1
 	.text
 
-#define __ASSEMBLY__
 #include <asm/assembly.h>
 #include <asm/signal.h>
 
@@ -81,6 +80,7 @@
 
 
 	.export hpux_fork_wrapper
+	.export hpux_child_return
 	.import sys_fork
 
 hpux_fork_wrapper:
@@ -91,12 +91,10 @@ hpux_fork_wrapper:
 	stw	%r2,-20(%r30)
 	ldo	64(%r30),%r30
 	stw	%r2,PT_GR19(%r1)	;! save for child
-	stw	%r30,PT_GR20(%r1)	;! save for child
-	ldil	L%child_return,%r3
-	ldo	R%child_return(%r3),%r3
-	stw	%r3,PT_GR21(%r1)	;! save for child
+	stw	%r30,PT_GR21(%r1)	;! save for child
 
-	ldw	TASK_PT_GR30(%r1),%r25
+	ldw     PT_GR30(%r1),%r25
+	mtctl   %r25,%cr29
 	copy	%r1,%r24
 	bl	sys_clone,%r2
 	ldi	SIGCHLD,%r26
@@ -130,7 +128,12 @@ fork_exit:
 
 	/* Set the return value for the child */
 
-child_return:
+hpux_child_return:
+#if CONFIG_SMP || CONFIG_PREEMPT
+	bl	schedule_tail, %r2
+	nop
+#endif
+
 	ldw TASK_PT_GR19-TASK_SZ_ALGN-128(%r30),%r2
 	b fork_return
 	copy %r0,%r28
@@ -242,3 +245,10 @@ hpux_syscall_exit:
 no_error:
 	b syscall_exit
 	nop
+
+	.export hpux_unimplemented_wrapper
+	.import hpux_unimplemented
+
+hpux_unimplemented_wrapper:
+	b hpux_unimplemented
+	stw %r22,-64(%r30)  /* overwrite arg8 with syscall number */