Merge http://lia64.bkbits.net/to-linus-2.5

into home.osdl.org:/home/torvalds/v2.5/linux

arch/ia64/kernel/efi.c

@@ -711,6 +711,32 @@ efi_mem_attributes (unsigned long phys_addr)
 	return 0;
 }
 
+int
+valid_phys_addr_range (unsigned long phys_addr, unsigned long *size)
+{
+	void *efi_map_start, *efi_map_end, *p;
+	efi_memory_desc_t *md;
+	u64 efi_desc_size;
+
+	efi_map_start = __va(ia64_boot_param->efi_memmap);
+	efi_map_end   = efi_map_start + ia64_boot_param->efi_memmap_size;
+	efi_desc_size = ia64_boot_param->efi_memdesc_size;
+
+	for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
+		md = p;
+
+		if (phys_addr - md->phys_addr < (md->num_pages << EFI_PAGE_SHIFT)) {
+			if (!(md->attribute & EFI_MEMORY_WB))
+				return 0;
+
+			if (*size > md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - phys_addr)
+				*size = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - phys_addr;
+			return 1;
+		}
+	}
+	return 0;
+}
+
 static void __exit
 efivars_exit (void)
 {

arch/ia64/kernel/gate-data.S

-	.section .data.gate, "ax"
+	.section .data.gate, "aw"
 
 	.incbin "arch/ia64/kernel/gate.so"

arch/ia64/kernel/irq.c

@@ -405,7 +405,7 @@ void enable_irq(unsigned int irq)
 	spin_lock_irqsave(&desc->lock, flags);
 	switch (desc->depth) {
 	case 1: {
-		unsigned int status = desc->status & ~(IRQ_DISABLED | IRQ_INPROGRESS);
+		unsigned int status = desc->status & ~IRQ_DISABLED;
 		desc->status = status;
 		if ((status & (IRQ_PENDING | IRQ_REPLAY)) == IRQ_PENDING) {
 			desc->status = status | IRQ_REPLAY;

arch/ia64/kernel/module.c

@@ -322,6 +322,10 @@ module_alloc (unsigned long size)
 void
 module_free (struct module *mod, void *module_region)
 {
+	if (mod->arch.init_unw_table && module_region == mod->module_init) {
+		unw_remove_unwind_table(mod->arch.init_unw_table);
+		mod->arch.init_unw_table = NULL;
+	}
 	vfree(module_region);
 }
 
@@ -843,23 +847,87 @@ apply_relocate (Elf64_Shdr *sechdrs, const char *strtab, unsigned int symindex,
 	return -ENOEXEC;
 }
 
+/*
+ * Modules contain a single unwind table which covers both the core and the init text
+ * sections but since the two are not contiguous, we need to split this table up such that
+ * we can register (and unregister) each "segment" seperately.  Fortunately, this sounds
+ * more complicated than it really is.
+ */
+static void
+register_unwind_table (struct module *mod)
+{
+	struct unw_table_entry *start = (void *) mod->arch.unwind->sh_addr;
+	struct unw_table_entry *end = start + mod->arch.unwind->sh_size / sizeof (*start);
+	struct unw_table_entry tmp, *e1, *e2, *core, *init;
+	unsigned long num_init = 0, num_core = 0;
+
+	/* First, count how many init and core unwind-table entries there are.  */
+	for (e1 = start; e1 < end; ++e1)
+		if (in_init(mod, e1->start_offset))
+			++num_init;
+		else
+			++num_core;
+	/*
+	 * Second, sort the table such that all unwind-table entries for the init and core
+	 * text sections are nicely separated.  We do this with a stupid bubble sort
+	 * (unwind tables don't get ridiculously huge).
+	 */
+	for (e1 = start; e1 < end; ++e1) {
+		for (e2 = e1 + 1; e2 < end; ++e2) {
+			if (e2->start_offset < e1->start_offset) {
+				tmp = *e1;
+				*e1 = *e2;
+				*e2 = tmp;
+			}
+		}
+	}
+	/*
+	 * Third, locate the init and core segments in the unwind table:
+	 */
+	if (in_init(mod, start->start_offset)) {
+		init = start;
+		core = start + num_init;
+	} else {
+		core = start;
+		init = start + num_core;
+	}
+
+	DEBUGP("%s: name=%s, gp=%lx, num_init=%lu, num_core=%lu\n", __FUNCTION__,
+	       mod->name, mod->arch.gp, num_init, num_core);
+
+	/*
+	 * Fourth, register both tables (if not empty).
+	 */
+	if (num_core > 0) {
+		mod->arch.core_unw_table = unw_add_unwind_table(mod->name, 0, mod->arch.gp,
+								core, core + num_core);
+		DEBUGP("%s:  core: handle=%p [%p-%p)\n", __FUNCTION__,
+		       mod->arch.core_unw_table, core, core + num_core);
+	}
+	if (num_init > 0) {
+		mod->arch.init_unw_table = unw_add_unwind_table(mod->name, 0, mod->arch.gp,
+								init, init + num_init);
+		DEBUGP("%s:  init: handle=%p [%p-%p)\n", __FUNCTION__,
+		       mod->arch.init_unw_table, init, init + num_init);
+	}
+}
+
 int
 module_finalize (const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, struct module *mod)
 {
 	DEBUGP("%s: init: entry=%p\n", __FUNCTION__, mod->init);
 	if (mod->arch.unwind)
-		mod->arch.unw_table = unw_add_unwind_table(mod->name, 0, mod->arch.gp,
-							   (void *) mod->arch.unwind->sh_addr,
-							   ((void *) mod->arch.unwind->sh_addr
-							    + mod->arch.unwind->sh_size));
+		register_unwind_table(mod);
 	return 0;
 }
 
 void
 module_arch_cleanup (struct module *mod)
 {
-	if (mod->arch.unwind)
-		unw_remove_unwind_table(mod->arch.unw_table);
+	if (mod->arch.init_unw_table)
+		unw_remove_unwind_table(mod->arch.init_unw_table);
+	if (mod->arch.core_unw_table)
+		unw_remove_unwind_table(mod->arch.core_unw_table);
 }
 
 #ifdef CONFIG_SMP

arch/ia64/kernel/process.c

@@ -353,9 +353,13 @@ copy_thread (int nr, unsigned long clone_flags,
 	/* copy parts of thread_struct: */
 	p->thread.ksp = (unsigned long) child_stack - 16;
 
-	/* stop some PSR bits from being inherited: */
+	/* stop some PSR bits from being inherited.
+	 * the psr.up/psr.pp bits must be cleared on fork but inherited on execve()
+	 * therefore we must specify them explicitly here and not include them in
+	 * IA64_PSR_BITS_TO_CLEAR.
+	 */
 	child_ptregs->cr_ipsr =  ((child_ptregs->cr_ipsr | IA64_PSR_BITS_TO_SET)
-				  & ~IA64_PSR_BITS_TO_CLEAR);
+			      & ~(IA64_PSR_BITS_TO_CLEAR | IA64_PSR_PP | IA64_PSR_UP));
 
 	/*
 	 * NOTE: The calling convention considers all floating point

arch/ia64/kernel/unwind_i.h

 /*
- * Copyright (C) 2000, 2002 Hewlett-Packard Co
+ * Copyright (C) 2000, 2002-2003 Hewlett-Packard Co
  *	David Mosberger-Tang <davidm@hpl.hp.com>
  *
  * Kernel unwind support.
@@ -45,12 +45,6 @@ struct unw_info_block {
 	/* personality routine and language-specific data follow behind descriptors */
 };
 
-struct unw_table_entry {
-	u64 start_offset;
-	u64 end_offset;
-	u64 info_offset;
-};
-
 struct unw_table {
 	struct unw_table *next;		/* must be first member! */
 	const char *name;

include/asm-ia64/io.h

@@ -72,6 +72,9 @@ phys_to_virt (unsigned long address)
 	return (void *) (address + PAGE_OFFSET);
 }
 
+#define ARCH_HAS_VALID_PHYS_ADDR_RANGE
+extern int valid_phys_addr_range (unsigned long addr, size_t *count); /* efi.c */
+
 /*
  * The following two macros are deprecated and scheduled for removal.
  * Please use the PCI-DMA interface defined in <asm/pci.h> instead.

include/asm-ia64/module.h

@@ -18,7 +18,8 @@ struct mod_arch_specific {
 	struct elf64_shdr *unwind;	/* unwind-table section */
 	unsigned long gp;		/* global-pointer for module */
 
-	void *unw_table;		/* unwind-table cookie returned by unwinder */
+	void *core_unw_table;		/* core unwind-table cookie returned by unwinder */
+	void *init_unw_table;		/* init unwind-table cookie returned by unwinder */
 	unsigned int next_got_entry;	/* index of next available got entry */
 };
 

include/asm-ia64/namei.h

@@ -9,7 +9,7 @@
 #include <asm/ptrace.h>
 #include <asm/system.h>
 
-#define EMUL_PREFIX_LINUX_IA32 "emul/ia32-linux/"
+#define EMUL_PREFIX_LINUX_IA32 "/emul/ia32-linux/"
 
 static inline char *
 __emul_prefix (void)

include/asm-ia64/unwind.h

@@ -93,6 +93,12 @@ struct unw_frame_info {
  * The official API follows below:
  */
 
+struct unw_table_entry {
+	u64 start_offset;
+	u64 end_offset;
+	u64 info_offset;
+};
+
 /*
  * Initialize unwind support.
  */