Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 108 insertions, 79 deletions

diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c
index 6b4605893f1e..016d6a0830a3 100644
--- a/arch/arm/kernel/module.c
+++ b/arch/arm/kernel/module.c
@@ -22,6 +22,7 @@
 
 #include <asm/pgtable.h>
 #include <asm/sections.h>
+#include <asm/smp_plat.h>
 #include <asm/unwind.h>
 
 #ifdef CONFIG_XIP_KERNEL
@@ -38,17 +39,9 @@
 #ifdef CONFIG_MMU
 void *module_alloc(unsigned long size)
 {
-        struct vm_struct *area;
-
-        size = PAGE_ALIGN(size);
-        if (!size)
-                return NULL;
-
-        area = __get_vm_area(size, VM_ALLOC, MODULES_VADDR, MODULES_END);
-        if (!area)
-                return NULL;
-
-        return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL_EXEC);
+        return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END,
+                                GFP_KERNEL, PAGE_KERNEL_EXEC, -1,
+                                __builtin_return_address(0));
 }
 #else /* CONFIG_MMU */
 void *module_alloc(unsigned long size)
@@ -67,24 +60,6 @@ int module_frob_arch_sections(Elf_Ehdr *hdr,
                               char *secstrings,
                               struct module *mod)
 {
-#ifdef CONFIG_ARM_UNWIND
-        Elf_Shdr *s, *sechdrs_end = sechdrs + hdr->e_shnum;
-
-        for (s = sechdrs; s < sechdrs_end; s++) {
-                if (strcmp(".ARM.exidx.init.text", secstrings + s->sh_name) == 0)
-                        mod->arch.unw_sec_init = s;
-                else if (strcmp(".ARM.exidx.devinit.text", secstrings + s->sh_name) == 0)
-                        mod->arch.unw_sec_devinit = s;
-                else if (strcmp(".ARM.exidx", secstrings + s->sh_name) == 0)
-                        mod->arch.unw_sec_core = s;
-                else if (strcmp(".init.text", secstrings + s->sh_name) == 0)
-                        mod->arch.sec_init_text = s;
-                else if (strcmp(".devinit.text", secstrings + s->sh_name) == 0)
-                        mod->arch.sec_devinit_text = s;
-                else if (strcmp(".text", secstrings + s->sh_name) == 0)
-                        mod->arch.sec_core_text = s;
-        }
-#endif
         return 0;
 }
 
@@ -101,6 +76,7 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
         for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rel); i++, rel++) {
                 unsigned long loc;
                 Elf32_Sym *sym;
+                const char *symname;
                 s32 offset;
 #ifdef CONFIG_THUMB2_KERNEL
                 u32 upper, lower, sign, j1, j2;
@@ -108,18 +84,18 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
 
                 offset = ELF32_R_SYM(rel->r_info);
                 if (offset < 0 || offset > (symsec->sh_size / sizeof(Elf32_Sym))) {
-                        printk(KERN_ERR "%s: bad relocation, section %d reloc %d\n",
+                        pr_err("%s: section %u reloc %u: bad relocation sym offset\n",
                                 module->name, relindex, i);
                         return -ENOEXEC;
                 }
 
                 sym = ((Elf32_Sym *)symsec->sh_addr) + offset;
+                symname = strtab + sym->st_name;
 
                 if (rel->r_offset < 0 || rel->r_offset > dstsec->sh_size - sizeof(u32)) {
-                        printk(KERN_ERR "%s: out of bounds relocation, "
-                                "section %d reloc %d offset %d size %d\n",
-                                module->name, relindex, i, rel->r_offset,
-                                dstsec->sh_size);
+                        pr_err("%s: section %u reloc %u sym '%s': out of bounds relocation, offset %d size %u\n",
+                               module->name, relindex, i, symname,
+                               rel->r_offset, dstsec->sh_size);
                         return -ENOEXEC;
                 }
 
@@ -145,10 +121,10 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
                         if (offset & 3 ||
                             offset <= (s32)0xfe000000 ||
                             offset >= (s32)0x02000000) {
-                                printk(KERN_ERR
-                                       "%s: relocation out of range, section "
-                                       "%d reloc %d sym '%s'\n", module->name,
-                                       relindex, i, strtab + sym->st_name);
+                                pr_err("%s: section %u reloc %u sym '%s': relocation %u out of range (%#lx -> %#x)\n",
+                                       module->name, relindex, i, symname,
+                                       ELF32_R_TYPE(rel->r_info), loc,
+                                       sym->st_value);
                                 return -ENOEXEC;
                         }
 
@@ -217,14 +193,23 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
                                 offset -= 0x02000000;
                         offset += sym->st_value - loc;
 
-                        /* only Thumb addresses allowed (no interworking) */
-                        if (!(offset & 1) ||
+                        /*
+                         * For function symbols, only Thumb addresses are
+                         * allowed (no interworking).
+                         *
+                         * For non-function symbols, the destination
+                         * has no specific ARM/Thumb disposition, so
+                         * the branch is resolved under the assumption
+                         * that interworking is not required.
+                         */
+                        if ((ELF32_ST_TYPE(sym->st_info) == STT_FUNC &&
+                                !(offset & 1)) ||
                             offset <= (s32)0xff000000 ||
                             offset >= (s32)0x01000000) {
-                                printk(KERN_ERR
-                                       "%s: relocation out of range, section "
-                                       "%d reloc %d sym '%s'\n", module->name,
-                                       relindex, i, strtab + sym->st_name);
+                                pr_err("%s: section %u reloc %u sym '%s': relocation %u out of range (%#lx -> %#x)\n",
+                                       module->name, relindex, i, symname,
+                                       ELF32_R_TYPE(rel->r_info), loc,
+                                       sym->st_value);
                                 return -ENOEXEC;
                         }
 
@@ -289,50 +274,94 @@ apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab,
         return -ENOEXEC;
 }
 
-#ifdef CONFIG_ARM_UNWIND
-static void register_unwind_tables(struct module *mod)
-{
-        if (mod->arch.unw_sec_init && mod->arch.sec_init_text)
-                mod->arch.unwind_init =
-                        unwind_table_add(mod->arch.unw_sec_init->sh_addr,
-                                         mod->arch.unw_sec_init->sh_size,
-                                         mod->arch.sec_init_text->sh_addr,
-                                         mod->arch.sec_init_text->sh_size);
-        if (mod->arch.unw_sec_devinit && mod->arch.sec_devinit_text)
-                mod->arch.unwind_devinit =
-                        unwind_table_add(mod->arch.unw_sec_devinit->sh_addr,
-                                         mod->arch.unw_sec_devinit->sh_size,
-                                         mod->arch.sec_devinit_text->sh_addr,
-                                         mod->arch.sec_devinit_text->sh_size);
-        if (mod->arch.unw_sec_core && mod->arch.sec_core_text)
-                mod->arch.unwind_core =
-                        unwind_table_add(mod->arch.unw_sec_core->sh_addr,
-                                         mod->arch.unw_sec_core->sh_size,
-                                         mod->arch.sec_core_text->sh_addr,
-                                         mod->arch.sec_core_text->sh_size);
-}
+struct mod_unwind_map {
+        const Elf_Shdr *unw_sec;
+        const Elf_Shdr *txt_sec;
+};
 
-static void unregister_unwind_tables(struct module *mod)
+static const Elf_Shdr *find_mod_section(const Elf32_Ehdr *hdr,
+        const Elf_Shdr *sechdrs, const char *name)
 {
-        unwind_table_del(mod->arch.unwind_init);
-        unwind_table_del(mod->arch.unwind_devinit);
-        unwind_table_del(mod->arch.unwind_core);
+        const Elf_Shdr *s, *se;
+        const char *secstrs = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
+
+        for (s = sechdrs, se = sechdrs + hdr->e_shnum; s < se; s++)
+                if (strcmp(name, secstrs + s->sh_name) == 0)
+                        return s;
+
+        return NULL;
 }
-#else
-static inline void register_unwind_tables(struct module *mod) { }
-static inline void unregister_unwind_tables(struct module *mod) { }
-#endif
 
-int
-module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs,
-                struct module *module)
+extern void fixup_pv_table(const void *, unsigned long);
+extern void fixup_smp(const void *, unsigned long);
+
+int module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs,
+                    struct module *mod)
 {
-        register_unwind_tables(module);
+        const Elf_Shdr *s = NULL;
+#ifdef CONFIG_ARM_UNWIND
+        const char *secstrs = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
+        const Elf_Shdr *sechdrs_end = sechdrs + hdr->e_shnum;
+        struct mod_unwind_map maps[ARM_SEC_MAX];
+        int i;
+
+        memset(maps, 0, sizeof(maps));
+
+        for (s = sechdrs; s < sechdrs_end; s++) {
+                const char *secname = secstrs + s->sh_name;
+
+                if (!(s->sh_flags & SHF_ALLOC))
+                        continue;
+
+                if (strcmp(".ARM.exidx.init.text", secname) == 0)
+                        maps[ARM_SEC_INIT].unw_sec = s;
+                else if (strcmp(".ARM.exidx.devinit.text", secname) == 0)
+                        maps[ARM_SEC_DEVINIT].unw_sec = s;
+                else if (strcmp(".ARM.exidx", secname) == 0)
+                        maps[ARM_SEC_CORE].unw_sec = s;
+                else if (strcmp(".ARM.exidx.exit.text", secname) == 0)
+                        maps[ARM_SEC_EXIT].unw_sec = s;
+                else if (strcmp(".ARM.exidx.devexit.text", secname) == 0)
+                        maps[ARM_SEC_DEVEXIT].unw_sec = s;
+                else if (strcmp(".init.text", secname) == 0)
+                        maps[ARM_SEC_INIT].txt_sec = s;
+                else if (strcmp(".devinit.text", secname) == 0)
+                        maps[ARM_SEC_DEVINIT].txt_sec = s;
+                else if (strcmp(".text", secname) == 0)
+                        maps[ARM_SEC_CORE].txt_sec = s;
+                else if (strcmp(".exit.text", secname) == 0)
+                        maps[ARM_SEC_EXIT].txt_sec = s;
+                else if (strcmp(".devexit.text", secname) == 0)
+                        maps[ARM_SEC_DEVEXIT].txt_sec = s;
+        }
+
+        for (i = 0; i < ARM_SEC_MAX; i++)
+                if (maps[i].unw_sec && maps[i].txt_sec)
+                        mod->arch.unwind[i] =
+                                unwind_table_add(maps[i].unw_sec->sh_addr,
+                                                 maps[i].unw_sec->sh_size,
+                                                 maps[i].txt_sec->sh_addr,
+                                                 maps[i].txt_sec->sh_size);
+#endif
+#ifdef CONFIG_ARM_PATCH_PHYS_VIRT
+        s = find_mod_section(hdr, sechdrs, ".pv_table");
+        if (s)
+                fixup_pv_table((void *)s->sh_addr, s->sh_size);
+#endif
+        s = find_mod_section(hdr, sechdrs, ".alt.smp.init");
+        if (s && !is_smp())
+                fixup_smp((void *)s->sh_addr, s->sh_size);
         return 0;
 }
 
 void
 module_arch_cleanup(struct module *mod)
 {
-        unregister_unwind_tables(mod);
+#ifdef CONFIG_ARM_UNWIND
+        int i;
+
+        for (i = 0; i < ARM_SEC_MAX; i++)
+                if (mod->arch.unwind[i])
+                        unwind_table_del(mod->arch.unwind[i]);
+#endif
 }