fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / arch / powerpc / kernel / module_64.c

diff --git a/arch/powerpc/kernel/module_64.c b/arch/powerpc/kernel/module_64.c
index 928b858..75c7c4f 100644 (file)
--- a/arch/powerpc/kernel/module_64.c
+++ b/arch/powerpc/kernel/module_64.c
@@ -20,8 +20,12 @@
 #include <linux/moduleloader.h>
 #include <linux/err.h>
 #include <linux/vmalloc.h>
+#include <linux/bug.h>
 #include <asm/module.h>
 #include <asm/uaccess.h>
+#include <asm/firmware.h>
+
+#include "setup.h"
 
 /* FIXME: We don't do .init separately.  To do this, we'd need to have
    a separate r2 value in the init and core section, and stub between
@@ -191,11 +195,19 @@ int module_frob_arch_sections(Elf64_Ehdr *hdr,
                                 (void *)hdr
                                 + sechdrs[sechdrs[i].sh_link].sh_offset);
        }
-       if (!me->arch.stubs_section || !me->arch.toc_section) {
-               printk("%s: doesn't contain .toc or .stubs.\n", me->name);
+
+       if (!me->arch.stubs_section) {
+               printk("%s: doesn't contain .stubs.\n", me->name);
                return -ENOEXEC;
        }
 
+       /* If we don't have a .toc, just use .stubs.  We need to set r2
+          to some reasonable value in case the module calls out to
+          other functions via a stub, or if a function pointer escapes
+          the module by some means.  */
+       if (!me->arch.toc_section)
+               me->arch.toc_section = me->arch.stubs_section;
+
        /* Override the stubs size */
        sechdrs[me->arch.stubs_section].sh_size = get_stubs_size(hdr, sechdrs);
        return 0;
@@ -342,7 +354,7 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
                        break;
 
                case R_PPC64_TOC16:
-                       /* Subtact TOC pointer */
+                       /* Subtract TOC pointer */
                        value -= my_r2(sechdrs, me);
                        if (value + 0x8000 > 0xffff) {
                                printk("%s: bad TOC16 relocation (%lu)\n",
@@ -355,7 +367,7 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
                        break;
 
                case R_PPC64_TOC16_DS:
-                       /* Subtact TOC pointer */
+                       /* Subtract TOC pointer */
                        value -= my_r2(sechdrs, me);
                        if ((value & 3) != 0 || value + 0x8000 > 0xffff) {
                                printk("%s: bad TOC16_DS relocation (%lu)\n",
@@ -392,6 +404,11 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
                                | (value & 0x03fffffc);
                        break;
 
+               case R_PPC64_REL64:
+                       /* 64 bits relative (used by features fixups) */
+                       *location = value - (unsigned long)location;
+                       break;
+
                default:
                        printk("%s: Unknown ADD relocation: %lu\n",
                               me->name,
@@ -405,38 +422,49 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
 
 LIST_HEAD(module_bug_list);
 
-int module_finalize(const Elf_Ehdr *hdr,
-               const Elf_Shdr *sechdrs, struct module *me)
+static const Elf_Shdr *find_section(const Elf_Ehdr *hdr,
+                                   const Elf_Shdr *sechdrs,
+                                   const char *name)
 {
        char *secstrings;
        unsigned int i;
 
-       me->arch.bug_table = NULL;
-       me->arch.num_bugs = 0;
-
-       /* Find the __bug_table section, if present */
        secstrings = (char *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
-       for (i = 1; i < hdr->e_shnum; i++) {
-               if (strcmp(secstrings+sechdrs[i].sh_name, "__bug_table"))
-                       continue;
-               me->arch.bug_table = (void *) sechdrs[i].sh_addr;
-               me->arch.num_bugs = sechdrs[i].sh_size / sizeof(struct bug_entry);
-               break;
-       }
+       for (i = 1; i < hdr->e_shnum; i++)
+               if (strcmp(secstrings+sechdrs[i].sh_name, name) == 0)
+                       return &sechdrs[i];
+       return NULL;
+}
 
-       /*
-        * Strictly speaking this should have a spinlock to protect against
-        * traversals, but since we only traverse on BUG()s, a spinlock
-        * could potentially lead to deadlock and thus be counter-productive.
-        */
-       list_add(&me->arch.bug_list, &module_bug_list);
+int module_finalize(const Elf_Ehdr *hdr,
+               const Elf_Shdr *sechdrs, struct module *me)
+{
+       const Elf_Shdr *sect;
+       int err;
+
+       err = module_bug_finalize(hdr, sechdrs, me);
+       if (err)
+               return err;
+
+       /* Apply feature fixups */
+       sect = find_section(hdr, sechdrs, "__ftr_fixup");
+       if (sect != NULL)
+               do_feature_fixups(cur_cpu_spec->cpu_features,
+                                 (void *)sect->sh_addr,
+                                 (void *)sect->sh_addr + sect->sh_size);
+
+       sect = find_section(hdr, sechdrs, "__fw_ftr_fixup");
+       if (sect != NULL)
+               do_feature_fixups(powerpc_firmware_features,
+                                 (void *)sect->sh_addr,
+                                 (void *)sect->sh_addr + sect->sh_size);
 
        return 0;
 }
 
 void module_arch_cleanup(struct module *mod)
 {
-       list_del(&mod->arch.bug_list);
+       module_bug_cleanup(mod);
 }
 
 struct bug_entry *module_find_bug(unsigned long bugaddr)