Linux-2.6.12-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, 237 insertions, 0 deletions

diff --git a/arch/v850/kernel/module.c b/arch/v850/kernel/module.c
new file mode 100644
index 000000000000..64aeb3e37c52
--- /dev/null
+++ b/arch/v850/kernel/module.c
@@ -0,0 +1,237 @@
+/*
+ * arch/v850/kernel/module.c -- Architecture-specific module functions
+ *
+ *  Copyright (C) 2002,03  NEC Electronics Corporation
+ *  Copyright (C) 2002,03  Miles Bader <miles@gnu.org>
+ *  Copyright (C) 2001,03  Rusty Russell
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file COPYING in the main directory of this
+ * archive for more details.
+ *
+ * Written by Miles Bader <miles@gnu.org>
+ *
+ * Derived in part from arch/ppc/kernel/module.c
+ */
+
+#include <linux/kernel.h>
+#include <linux/vmalloc.h>
+#include <linux/moduleloader.h>
+#include <linux/elf.h>
+
+#if 0
+#define DEBUGP printk
+#else
+#define DEBUGP(fmt , ...)
+#endif
+
+void *module_alloc (unsigned long size)
+{
+	return size == 0 ? 0 : vmalloc (size);
+}
+
+void module_free (struct module *mod, void *module_region)
+{
+	vfree (module_region);
+	/* FIXME: If module_region == mod->init_region, trim exception
+           table entries. */
+}
+
+int module_finalize (const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs,
+		     struct module *mod)
+{
+	return 0;
+}
+
+/* Count how many different relocations (different symbol, different
+   addend) */
+static unsigned int count_relocs(const Elf32_Rela *rela, unsigned int num)
+{
+	unsigned int i, j, ret = 0;
+
+	/* Sure, this is order(n^2), but it's usually short, and not
+           time critical */
+	for (i = 0; i < num; i++) {
+		for (j = 0; j < i; j++) {
+			/* If this addend appeared before, it's
+                           already been counted */
+			if (ELF32_R_SYM(rela[i].r_info)
+			    == ELF32_R_SYM(rela[j].r_info)
+			    && rela[i].r_addend == rela[j].r_addend)
+				break;
+		}
+		if (j == i) ret++;
+	}
+	return ret;
+}
+
+/* Get the potential trampolines size required of the init and
+   non-init sections */
+static unsigned long get_plt_size(const Elf32_Ehdr *hdr,
+				  const Elf32_Shdr *sechdrs,
+				  const char *secstrings,
+				  int is_init)
+{
+	unsigned long ret = 0;
+	unsigned i;
+
+	/* Everything marked ALLOC (this includes the exported
+           symbols) */
+	for (i = 1; i < hdr->e_shnum; i++) {
+		/* If it's called *.init*, and we're not init, we're
+                   not interested */
+		if ((strstr(secstrings + sechdrs[i].sh_name, ".init") != 0)
+		    != is_init)
+			continue;
+
+		if (sechdrs[i].sh_type == SHT_RELA) {
+			DEBUGP("Found relocations in section %u\n", i);
+			DEBUGP("Ptr: %p.  Number: %u\n",
+			       (void *)hdr + sechdrs[i].sh_offset,
+			       sechdrs[i].sh_size / sizeof(Elf32_Rela));
+			ret += count_relocs((void *)hdr
+					     + sechdrs[i].sh_offset,
+					     sechdrs[i].sh_size
+					     / sizeof(Elf32_Rela))
+				* sizeof(struct v850_plt_entry);
+		}
+	}
+
+	return ret;
+}
+
+int module_frob_arch_sections(Elf32_Ehdr *hdr,
+			      Elf32_Shdr *sechdrs,
+			      char *secstrings,
+			      struct module *me)
+{
+	unsigned int i;
+
+	/* Find .plt and .pltinit sections */
+	for (i = 0; i < hdr->e_shnum; i++) {
+		if (strcmp(secstrings + sechdrs[i].sh_name, ".init.plt") == 0)
+			me->arch.init_plt_section = i;
+		else if (strcmp(secstrings + sechdrs[i].sh_name, ".plt") == 0)
+			me->arch.core_plt_section = i;
+	}
+	if (!me->arch.core_plt_section || !me->arch.init_plt_section) {
+		printk("Module doesn't contain .plt or .plt.init sections.\n");
+		return -ENOEXEC;
+	}
+
+	/* Override their sizes */
+	sechdrs[me->arch.core_plt_section].sh_size
+		= get_plt_size(hdr, sechdrs, secstrings, 0);
+	sechdrs[me->arch.init_plt_section].sh_size
+		= get_plt_size(hdr, sechdrs, secstrings, 1);
+	return 0;
+}
+
+int apply_relocate (Elf32_Shdr *sechdrs, const char *strtab,
+		    unsigned int symindex, unsigned int relsec,
+		    struct module *mod)
+{
+	printk ("Barf\n");
+	return -ENOEXEC;
+}
+
+/* Set up a trampoline in the PLT to bounce us to the distant function */
+static uint32_t do_plt_call (void *location, Elf32_Addr val,
+			     Elf32_Shdr *sechdrs, struct module *mod)
+{
+	struct v850_plt_entry *entry;
+	/* Instructions used to do the indirect jump.  */
+	uint32_t tramp[2];
+
+	/* We have to trash a register, so we assume that any control
+	   transfer more than 21-bits away must be a function call
+	   (so we can use a call-clobbered register).  */
+	tramp[0] = 0x0621 + ((val & 0xffff) << 16);   /* mov sym, r1 ... */
+	tramp[1] = ((val >> 16) & 0xffff) + 0x610000; /* ...; jmp r1 */
+
+	/* Init, or core PLT? */
+	if (location >= mod->module_core
+	    && location < mod->module_core + mod->core_size)
+		entry = (void *)sechdrs[mod->arch.core_plt_section].sh_addr;
+	else
+		entry = (void *)sechdrs[mod->arch.init_plt_section].sh_addr;
+
+	/* Find this entry, or if that fails, the next avail. entry */
+	while (entry->tramp[0])
+		if (entry->tramp[0] == tramp[0] && entry->tramp[1] == tramp[1])
+			return (uint32_t)entry;
+		else
+			entry++;
+
+	entry->tramp[0] = tramp[0];
+	entry->tramp[1] = tramp[1];
+
+	return (uint32_t)entry;
+}
+
+int apply_relocate_add (Elf32_Shdr *sechdrs, const char *strtab,
+			unsigned int symindex, unsigned int relsec,
+			struct module *mod)
+{
+	unsigned int i;
+	Elf32_Rela *rela = (void *)sechdrs[relsec].sh_addr;
+
+	DEBUGP ("Applying relocate section %u to %u\n", relsec,
+		sechdrs[relsec].sh_info);
+
+	for (i = 0; i < sechdrs[relsec].sh_size / sizeof (*rela); i++) {
+		/* This is where to make the change */
+		uint32_t *loc
+			= ((void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
+			   + rela[i].r_offset);
+		/* This is the symbol it is referring to.  Note that all
+		   undefined symbols have been resolved.  */
+		Elf32_Sym *sym
+			= ((Elf32_Sym *)sechdrs[symindex].sh_addr
+			   + ELF32_R_SYM (rela[i].r_info));
+		uint32_t val = sym->st_value + rela[i].r_addend;
+
+		switch (ELF32_R_TYPE (rela[i].r_info)) {
+		case R_V850_32:
+			/* We write two shorts instead of a long because even
+			   32-bit insns only need half-word alignment, but
+			   32-bit data writes need to be long-word aligned.  */
+			val += ((uint16_t *)loc)[0];
+			val += ((uint16_t *)loc)[1] << 16;
+			((uint16_t *)loc)[0] = val & 0xffff;
+			((uint16_t *)loc)[1] = (val >> 16) & 0xffff;
+			break;
+
+		case R_V850_22_PCREL:
+			/* Maybe jump indirectly via a PLT table entry.  */
+			if ((int32_t)(val - (uint32_t)loc) > 0x1fffff
+			    || (int32_t)(val - (uint32_t)loc) < -0x200000)
+				val = do_plt_call (loc, val, sechdrs, mod);
+
+			val -= (uint32_t)loc;
+
+			/* We write two shorts instead of a long because
+			   even 32-bit insns only need half-word alignment,
+			   but 32-bit data writes need to be long-word
+			   aligned.  */
+			((uint16_t *)loc)[0] =
+				(*(uint16_t *)loc & 0xffc0) /* opcode + reg */
+				| ((val >> 16) & 0xffc03f); /* offs high */
+			((uint16_t *)loc)[1] =
+				(val & 0xffff);		    /* offs low */
+			break;
+
+		default:
+			printk (KERN_ERR "module %s: Unknown reloc: %u\n",
+				mod->name, ELF32_R_TYPE (rela[i].r_info));
+			return -ENOEXEC;
+		}
+	}
+
+	return 0;
+}
+
+void
+module_arch_cleanup(struct module *mod)
+{
+}