Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 405 insertions, 0 deletions

diff --git a/arch/s390/kernel/module.c b/arch/s390/kernel/module.c
new file mode 100644
index 000000000000..607d506689c8
--- /dev/null
+++ b/arch/s390/kernel/module.c
@@ -0,0 +1,405 @@
+/*
+ *  arch/s390/kernel/module.c - Kernel module help for s390.
+ *
+ *  S390 version
+ *    Copyright (C) 2002, 2003 IBM Deutschland Entwicklung GmbH,
+ *			       IBM Corporation
+ *    Author(s): Arnd Bergmann (arndb@de.ibm.com)
+ *		 Martin Schwidefsky (schwidefsky@de.ibm.com)
+ *
+ *  based on i386 version
+ *    Copyright (C) 2001 Rusty Russell.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#include <linux/module.h>
+#include <linux/elf.h>
+#include <linux/vmalloc.h>
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+
+#if 0
+#define DEBUGP printk
+#else
+#define DEBUGP(fmt , ...)
+#endif
+
+#ifndef CONFIG_ARCH_S390X
+#define PLT_ENTRY_SIZE 12
+#else /* CONFIG_ARCH_S390X */
+#define PLT_ENTRY_SIZE 20
+#endif /* CONFIG_ARCH_S390X */
+
+void *module_alloc(unsigned long size)
+{
+	if (size == 0)
+		return NULL;
+	return vmalloc(size);
+}
+
+/* Free memory returned from module_alloc */
+void module_free(struct module *mod, void *module_region)
+{
+	vfree(module_region);
+	/* FIXME: If module_region == mod->init_region, trim exception
+           table entries. */
+}
+
+static inline void
+check_rela(Elf_Rela *rela, struct module *me)
+{
+	struct mod_arch_syminfo *info;
+
+	info = me->arch.syminfo + ELF_R_SYM (rela->r_info);
+	switch (ELF_R_TYPE (rela->r_info)) {
+	case R_390_GOT12:	/* 12 bit GOT offset.  */
+	case R_390_GOT16:	/* 16 bit GOT offset.  */
+	case R_390_GOT20:	/* 20 bit GOT offset.  */
+	case R_390_GOT32:	/* 32 bit GOT offset.  */
+	case R_390_GOT64:	/* 64 bit GOT offset.  */
+	case R_390_GOTENT:	/* 32 bit PC rel. to GOT entry shifted by 1. */
+	case R_390_GOTPLT12:	/* 12 bit offset to jump slot.	*/
+	case R_390_GOTPLT16:	/* 16 bit offset to jump slot.  */
+	case R_390_GOTPLT20:	/* 20 bit offset to jump slot.  */
+	case R_390_GOTPLT32:	/* 32 bit offset to jump slot.  */
+	case R_390_GOTPLT64:	/* 64 bit offset to jump slot.	*/
+	case R_390_GOTPLTENT:	/* 32 bit rel. offset to jump slot >> 1. */
+		if (info->got_offset == -1UL) {
+			info->got_offset = me->arch.got_size;
+			me->arch.got_size += sizeof(void*);
+		}
+		break;
+	case R_390_PLT16DBL:	/* 16 bit PC rel. PLT shifted by 1.  */
+	case R_390_PLT32DBL:	/* 32 bit PC rel. PLT shifted by 1.  */
+	case R_390_PLT32:	/* 32 bit PC relative PLT address.  */
+	case R_390_PLT64:	/* 64 bit PC relative PLT address.  */
+	case R_390_PLTOFF16:	/* 16 bit offset from GOT to PLT. */
+	case R_390_PLTOFF32:	/* 32 bit offset from GOT to PLT. */
+	case R_390_PLTOFF64:	/* 16 bit offset from GOT to PLT. */
+		if (info->plt_offset == -1UL) {
+			info->plt_offset = me->arch.plt_size;
+			me->arch.plt_size += PLT_ENTRY_SIZE;
+		}
+		break;
+	case R_390_COPY:
+	case R_390_GLOB_DAT:
+	case R_390_JMP_SLOT:
+	case R_390_RELATIVE:
+		/* Only needed if we want to support loading of 
+		   modules linked with -shared. */
+		break;
+	}
+}
+
+/*
+ * Account for GOT and PLT relocations. We can't add sections for
+ * got and plt but we can increase the core module size.
+ */
+int
+module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
+			  char *secstrings, struct module *me)
+{
+	Elf_Shdr *symtab;
+	Elf_Sym *symbols;
+	Elf_Rela *rela;
+	char *strings;
+	int nrela, i, j;
+
+	/* Find symbol table and string table. */
+	symtab = 0;
+	for (i = 0; i < hdr->e_shnum; i++)
+		switch (sechdrs[i].sh_type) {
+		case SHT_SYMTAB:
+			symtab = sechdrs + i;
+			break;
+		}
+	if (!symtab) {
+		printk(KERN_ERR "module %s: no symbol table\n", me->name);
+		return -ENOEXEC;
+	}
+
+	/* Allocate one syminfo structure per symbol. */
+	me->arch.nsyms = symtab->sh_size / sizeof(Elf_Sym);
+	me->arch.syminfo = vmalloc(me->arch.nsyms *
+				   sizeof(struct mod_arch_syminfo));
+	if (!me->arch.syminfo)
+		return -ENOMEM;
+	symbols = (void *) hdr + symtab->sh_offset;
+	strings = (void *) hdr + sechdrs[symtab->sh_link].sh_offset;
+	for (i = 0; i < me->arch.nsyms; i++) {
+		if (symbols[i].st_shndx == SHN_UNDEF &&
+		    strcmp(strings + symbols[i].st_name,
+			   "_GLOBAL_OFFSET_TABLE_") == 0)
+			/* "Define" it as absolute. */
+			symbols[i].st_shndx = SHN_ABS;
+		me->arch.syminfo[i].got_offset = -1UL;
+		me->arch.syminfo[i].plt_offset = -1UL;
+		me->arch.syminfo[i].got_initialized = 0;
+		me->arch.syminfo[i].plt_initialized = 0;
+	}
+
+	/* Search for got/plt relocations. */
+	me->arch.got_size = me->arch.plt_size = 0;
+	for (i = 0; i < hdr->e_shnum; i++) {
+		if (sechdrs[i].sh_type != SHT_RELA)
+			continue;
+		nrela = sechdrs[i].sh_size / sizeof(Elf_Rela);
+		rela = (void *) hdr + sechdrs[i].sh_offset;
+		for (j = 0; j < nrela; j++)
+			check_rela(rela + j, me);
+	}
+
+	/* Increase core size by size of got & plt and set start
+	   offsets for got and plt. */
+	me->core_size = ALIGN(me->core_size, 4);
+	me->arch.got_offset = me->core_size;
+	me->core_size += me->arch.got_size;
+	me->arch.plt_offset = me->core_size;
+	me->core_size += me->arch.plt_size;
+	return 0;
+}
+
+int
+apply_relocate(Elf_Shdr *sechdrs, const char *strtab, unsigned int symindex,
+	       unsigned int relsec, struct module *me)
+{
+	printk(KERN_ERR "module %s: RELOCATION unsupported\n",
+	       me->name);
+	return -ENOEXEC;
+}
+
+static inline int
+apply_rela(Elf_Rela *rela, Elf_Addr base, Elf_Sym *symtab, 
+	   struct module *me)
+{
+	struct mod_arch_syminfo *info;
+	Elf_Addr loc, val;
+	int r_type, r_sym;
+
+	/* This is where to make the change */
+	loc = base + rela->r_offset;
+	/* This is the symbol it is referring to.  Note that all
+	   undefined symbols have been resolved.  */
+	r_sym = ELF_R_SYM(rela->r_info);
+	r_type = ELF_R_TYPE(rela->r_info);
+	info = me->arch.syminfo + r_sym;
+	val = symtab[r_sym].st_value;
+
+	switch (r_type) {
+	case R_390_8:		/* Direct 8 bit.   */
+	case R_390_12:		/* Direct 12 bit.  */
+	case R_390_16:		/* Direct 16 bit.  */
+	case R_390_20:		/* Direct 20 bit.  */
+	case R_390_32:		/* Direct 32 bit.  */
+	case R_390_64:		/* Direct 64 bit.  */
+		val += rela->r_addend;
+		if (r_type == R_390_8)
+			*(unsigned char *) loc = val;
+		else if (r_type == R_390_12)
+			*(unsigned short *) loc = (val & 0xfff) |
+				(*(unsigned short *) loc & 0xf000);
+		else if (r_type == R_390_16)
+			*(unsigned short *) loc = val;
+		else if (r_type == R_390_20)
+			*(unsigned int *) loc =
+				(*(unsigned int *) loc & 0xf00000ff) |
+				(val & 0xfff) << 16 | (val & 0xff000) >> 4;
+		else if (r_type == R_390_32)
+			*(unsigned int *) loc = val;
+		else if (r_type == R_390_64)
+			*(unsigned long *) loc = val;
+		break;
+	case R_390_PC16:	/* PC relative 16 bit.  */
+	case R_390_PC16DBL:	/* PC relative 16 bit shifted by 1.  */
+	case R_390_PC32DBL:	/* PC relative 32 bit shifted by 1.  */
+	case R_390_PC32:	/* PC relative 32 bit.  */
+	case R_390_PC64:	/* PC relative 64 bit.	*/
+		val += rela->r_addend - loc;
+		if (r_type == R_390_PC16)
+			*(unsigned short *) loc = val;
+		else if (r_type == R_390_PC16DBL)
+			*(unsigned short *) loc = val >> 1;
+		else if (r_type == R_390_PC32DBL)
+			*(unsigned int *) loc = val >> 1;
+		else if (r_type == R_390_PC32)
+			*(unsigned int *) loc = val;
+		else if (r_type == R_390_PC64)
+			*(unsigned long *) loc = val;
+		break;
+	case R_390_GOT12:	/* 12 bit GOT offset.  */
+	case R_390_GOT16:	/* 16 bit GOT offset.  */
+	case R_390_GOT20:	/* 20 bit GOT offset.  */
+	case R_390_GOT32:	/* 32 bit GOT offset.  */
+	case R_390_GOT64:	/* 64 bit GOT offset.  */
+	case R_390_GOTENT:	/* 32 bit PC rel. to GOT entry shifted by 1. */
+	case R_390_GOTPLT12:	/* 12 bit offset to jump slot.	*/
+	case R_390_GOTPLT20:	/* 20 bit offset to jump slot.  */
+	case R_390_GOTPLT16:	/* 16 bit offset to jump slot.  */
+	case R_390_GOTPLT32:	/* 32 bit offset to jump slot.  */
+	case R_390_GOTPLT64:	/* 64 bit offset to jump slot.	*/
+	case R_390_GOTPLTENT:	/* 32 bit rel. offset to jump slot >> 1. */
+		if (info->got_initialized == 0) {
+			Elf_Addr *gotent;
+
+			gotent = me->module_core + me->arch.got_offset +
+				info->got_offset;
+			*gotent = val;
+			info->got_initialized = 1;
+		}
+		val = info->got_offset + rela->r_addend;
+		if (r_type == R_390_GOT12 ||
+		    r_type == R_390_GOTPLT12)
+			*(unsigned short *) loc = (val & 0xfff) |
+				(*(unsigned short *) loc & 0xf000);
+		else if (r_type == R_390_GOT16 ||
+			 r_type == R_390_GOTPLT16)
+			*(unsigned short *) loc = val;
+		else if (r_type == R_390_GOT20 ||
+			 r_type == R_390_GOTPLT20)
+			*(unsigned int *) loc =
+				(*(unsigned int *) loc & 0xf00000ff) |
+				(val & 0xfff) << 16 | (val & 0xff000) >> 4;
+		else if (r_type == R_390_GOT32 ||
+			 r_type == R_390_GOTPLT32)
+			*(unsigned int *) loc = val;
+		else if (r_type == R_390_GOTENT ||
+			 r_type == R_390_GOTPLTENT)
+			*(unsigned int *) loc =
+				(val + (Elf_Addr) me->module_core - loc) >> 1;
+		else if (r_type == R_390_GOT64 ||
+			 r_type == R_390_GOTPLT64)
+			*(unsigned long *) loc = val;
+		break;
+	case R_390_PLT16DBL:	/* 16 bit PC rel. PLT shifted by 1.  */
+	case R_390_PLT32DBL:	/* 32 bit PC rel. PLT shifted by 1.  */
+	case R_390_PLT32:	/* 32 bit PC relative PLT address.  */
+	case R_390_PLT64:	/* 64 bit PC relative PLT address.  */
+	case R_390_PLTOFF16:	/* 16 bit offset from GOT to PLT. */
+	case R_390_PLTOFF32:	/* 32 bit offset from GOT to PLT. */
+	case R_390_PLTOFF64:	/* 16 bit offset from GOT to PLT. */
+		if (info->plt_initialized == 0) {
+			unsigned int *ip;
+			ip = me->module_core + me->arch.plt_offset +
+				info->plt_offset;
+#ifndef CONFIG_ARCH_S390X
+			ip[0] = 0x0d105810; /* basr 1,0; l 1,6(1); br 1 */
+			ip[1] = 0x100607f1;
+			ip[2] = val;
+#else /* CONFIG_ARCH_S390X */
+			ip[0] = 0x0d10e310; /* basr 1,0; lg 1,10(1); br 1 */
+			ip[1] = 0x100a0004;
+			ip[2] = 0x07f10000;
+			ip[3] = (unsigned int) (val >> 32);
+			ip[4] = (unsigned int) val;
+#endif /* CONFIG_ARCH_S390X */
+			info->plt_initialized = 1;
+		}
+		if (r_type == R_390_PLTOFF16 ||
+		    r_type == R_390_PLTOFF32
+		    || r_type == R_390_PLTOFF64
+			)
+			val = me->arch.plt_offset - me->arch.got_offset +
+				info->plt_offset + rela->r_addend;
+		else
+			val =  (Elf_Addr) me->module_core +
+				me->arch.plt_offset + info->plt_offset + 
+				rela->r_addend - loc;
+		if (r_type == R_390_PLT16DBL)
+			*(unsigned short *) loc = val >> 1;
+		else if (r_type == R_390_PLTOFF16)
+			*(unsigned short *) loc = val;
+		else if (r_type == R_390_PLT32DBL)
+			*(unsigned int *) loc = val >> 1;
+		else if (r_type == R_390_PLT32 ||
+			 r_type == R_390_PLTOFF32)
+			*(unsigned int *) loc = val;
+		else if (r_type == R_390_PLT64 ||
+			 r_type == R_390_PLTOFF64)
+			*(unsigned long *) loc = val;
+		break;
+	case R_390_GOTOFF16:	/* 16 bit offset to GOT.  */
+	case R_390_GOTOFF32:	/* 32 bit offset to GOT.  */
+	case R_390_GOTOFF64:	/* 64 bit offset to GOT. */
+		val = val + rela->r_addend -
+			((Elf_Addr) me->module_core + me->arch.got_offset);
+		if (r_type == R_390_GOTOFF16)
+			*(unsigned short *) loc = val;
+		else if (r_type == R_390_GOTOFF32)
+			*(unsigned int *) loc = val;
+		else if (r_type == R_390_GOTOFF64)
+			*(unsigned long *) loc = val;
+		break;
+	case R_390_GOTPC:	/* 32 bit PC relative offset to GOT. */
+	case R_390_GOTPCDBL:	/* 32 bit PC rel. off. to GOT shifted by 1. */
+		val = (Elf_Addr) me->module_core + me->arch.got_offset +
+			rela->r_addend - loc;
+		if (r_type == R_390_GOTPC)
+			*(unsigned int *) loc = val;
+		else if (r_type == R_390_GOTPCDBL)
+			*(unsigned int *) loc = val >> 1;
+		break;
+	case R_390_COPY:
+	case R_390_GLOB_DAT:	/* Create GOT entry.  */
+	case R_390_JMP_SLOT:	/* Create PLT entry.  */
+	case R_390_RELATIVE:	/* Adjust by program base.  */
+		/* Only needed if we want to support loading of 
+		   modules linked with -shared. */
+		break;
+	default:
+		printk(KERN_ERR "module %s: Unknown relocation: %u\n",
+		       me->name, r_type);
+		return -ENOEXEC;
+	}
+	return 0;
+}
+
+int
+apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab,
+		   unsigned int symindex, unsigned int relsec,
+		   struct module *me)
+{
+	Elf_Addr base;
+	Elf_Sym *symtab;
+	Elf_Rela *rela;
+	unsigned long i, n;
+	int rc;
+
+	DEBUGP("Applying relocate section %u to %u\n",
+	       relsec, sechdrs[relsec].sh_info);
+	base = sechdrs[sechdrs[relsec].sh_info].sh_addr;
+	symtab = (Elf_Sym *) sechdrs[symindex].sh_addr;
+	rela = (Elf_Rela *) sechdrs[relsec].sh_addr;
+	n = sechdrs[relsec].sh_size / sizeof(Elf_Rela);
+
+	for (i = 0; i < n; i++, rela++) {
+		rc = apply_rela(rela, base, symtab, me);
+		if (rc)
+			return rc;
+	}
+	return 0;
+}
+
+int module_finalize(const Elf_Ehdr *hdr,
+		    const Elf_Shdr *sechdrs,
+		    struct module *me)
+{
+	vfree(me->arch.syminfo);
+	return 0;
+}
+
+void module_arch_cleanup(struct module *mod)
+{
+}