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Date: Thu, 26 Mar 2009 20:40:31 +0530
From: Jaswinder Singh Rajput <jaswinder@...nel.org>
To: Ingo Molnar <mingo@...e.hu>, x86 maintainers <x86@...nel.org>,
LKML <linux-kernel@...r.kernel.org>,
Andi Kleen <andi@...stfloor.org>,
Rusty Russell <rusty@...tcorp.com.au>
Subject: [git-pull -tip] x86: unification and cleanup patches 20090326
Individual log and patches are available at:
http://git.kernel.org/?p=linux/kernel/git/jaswinder/linux-2.6-tip.git;a=shortlog;h=x86/core
The following changes since commit 29219683c46cb89edf5c58418b5305b14646d030:
Ingo Molnar (1):
Merge branches 'x86/apic', 'x86/cleanups', 'x86/mm', 'x86/pat', 'x86/setup' and 'x86/signal'; commit 'v2.6.29' into x86/core
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/jaswinder/linux-2.6-tip.git x86/core
Jaswinder Singh Rajput (3):
x86: unification of cpu/bugs.c
x86: cpu/bugs.c cleanup
x86: unification of module.c
arch/x86/kernel/Makefile | 2 +-
arch/x86/kernel/cpu/Makefile | 5 +-
arch/x86/kernel/cpu/bugs.c | 87 ++++++++++++-----
arch/x86/kernel/cpu/bugs_64.c | 33 ------
arch/x86/kernel/{module_64.c => module.c} | 123 ++++++++++++++++++------
arch/x86/kernel/module_32.c | 152 -----------------------------
6 files changed, 160 insertions(+), 242 deletions(-)
delete mode 100644 arch/x86/kernel/cpu/bugs_64.c
rename arch/x86/kernel/{module_64.c => module.c} (70%)
delete mode 100644 arch/x86/kernel/module_32.c
Complete diff:
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 339ce35..87b1c05 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -72,7 +72,7 @@ obj-$(CONFIG_KEXEC) += relocate_kernel_$(BITS).o crash.o
obj-$(CONFIG_CRASH_DUMP) += crash_dump_$(BITS).o
obj-$(CONFIG_X86_VSMP) += vsmp_64.o
obj-$(CONFIG_KPROBES) += kprobes.o
-obj-$(CONFIG_MODULES) += module_$(BITS).o
+obj-$(CONFIG_MODULES) += module.o
obj-$(CONFIG_EFI) += efi.o efi_$(BITS).o efi_stub_$(BITS).o
obj-$(CONFIG_DOUBLEFAULT) += doublefault_32.o
obj-$(CONFIG_KGDB) += kgdb.o
diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile
index 4e242f9..90a96ee 100644
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -9,10 +9,9 @@ endif
obj-y := intel_cacheinfo.o addon_cpuid_features.o
obj-y += proc.o capflags.o powerflags.o common.o
-obj-y += vmware.o hypervisor.o
+obj-y += vmware.o hypervisor.o bugs.o
-obj-$(CONFIG_X86_32) += bugs.o cmpxchg.o
-obj-$(CONFIG_X86_64) += bugs_64.o
+obj-$(CONFIG_X86_32) += cmpxchg.o
obj-$(CONFIG_X86_CPU_DEBUG) += cpu_debug.o
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index c8e315f..e314704 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -6,17 +6,25 @@
* <rreilova@...cs.uc.edu>
* - Channing Corn (tests & fixes),
* - Andrew D. Balsa (code cleanup).
+ *
+ * Copyright (C) 2000 SuSE
*/
-#include <linux/init.h>
+
#include <linux/utsname.h>
-#include <asm/bugs.h>
-#include <asm/processor.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+
#include <asm/processor-flags.h>
+#include <asm/alternative.h>
+#include <asm/cacheflush.h>
+#include <asm/processor.h>
+#include <asm/paravirt.h>
+#include <asm/pgtable.h>
#include <asm/i387.h>
+#include <asm/bugs.h>
#include <asm/msr.h>
-#include <asm/paravirt.h>
-#include <asm/alternative.h>
+#ifdef CONFIG_X86_32
static int __init no_halt(char *s)
{
boot_cpu_data.hlt_works_ok = 0;
@@ -56,7 +64,8 @@ static void __init check_fpu(void)
#ifndef CONFIG_MATH_EMULATION
printk(KERN_EMERG "No coprocessor found and no math emulation present.\n");
printk(KERN_EMERG "Giving up.\n");
- for (;;) ;
+ for (;;)
+ ;
#endif
return;
}
@@ -67,21 +76,21 @@ static void __init check_fpu(void)
*
* Test for the divl bug..
*/
- __asm__("fninit\n\t"
- "fldl %1\n\t"
- "fdivl %2\n\t"
- "fmull %2\n\t"
- "fldl %1\n\t"
- "fsubp %%st,%%st(1)\n\t"
- "fistpl %0\n\t"
- "fwait\n\t"
+ __asm__("fninit \n\t"
+ "fldl %1 \n\t"
+ "fdivl %2 \n\t"
+ "fmull %2 \n\t"
+ "fldl %1 \n\t"
+ "fsubp %%st,%%st(1) \n\t"
+ "fistpl %0 \n\t"
+ "fwait \n\t"
"fninit"
: "=m" (*&fdiv_bug)
: "m" (*&x), "m" (*&y));
boot_cpu_data.fdiv_bug = fdiv_bug;
if (boot_cpu_data.fdiv_bug)
- printk("Hmm, FPU with FDIV bug.\n");
+ printk(KERN_INFO "Hmm, FPU with FDIV bug.\n");
}
static void __init check_hlt(void)
@@ -91,7 +100,7 @@ static void __init check_hlt(void)
printk(KERN_INFO "Checking 'hlt' instruction... ");
if (!boot_cpu_data.hlt_works_ok) {
- printk("disabled\n");
+ printk(KERN_INFO "disabled\n");
return;
}
halt();
@@ -113,10 +122,14 @@ static void __init check_popad(void)
printk(KERN_INFO "Checking for popad bug... ");
__asm__ __volatile__(
- "movl $12345678,%%eax; movl $0,%%edi; pusha; popa; movl (%%edx,%%edi),%%ecx "
- : "=&a" (res)
- : "d" (inp)
- : "ecx", "edi");
+ "movl $12345678,%%eax \n\t"
+ "movl $0,%%edi \n\t"
+ "pusha \n\t"
+ "popa \n\t"
+ "movl (%%edx,%%edi),%%ecx"
+ : "=&a" (res)
+ : "d" (inp)
+ : "ecx", "edi");
/*
* If this fails, it means that any user program may lock the
* CPU hard. Too bad.
@@ -151,19 +164,43 @@ static void __init check_config(void)
#endif
}
+/*
+ * Check various bugs
+ */
+static void __init check_various_bugs(void)
+{
+ check_config();
+ check_fpu();
+ check_hlt();
+ check_popad();
+}
+#else /* CONFIG_X86_32 */
+static inline void __init check_various_bugs(void) {}
+#endif /* CONFIG_X86_32 */
void __init check_bugs(void)
{
identify_boot_cpu();
#ifndef CONFIG_SMP
- printk("CPU: ");
+ printk(KERN_INFO "CPU: ");
print_cpu_info(&boot_cpu_data);
#endif
- check_config();
- check_fpu();
- check_hlt();
- check_popad();
+ check_various_bugs();
+
init_utsname()->machine[1] =
'0' + (boot_cpu_data.x86 > 6 ? 6 : boot_cpu_data.x86);
alternative_instructions();
+
+#ifdef CONFIG_X86_64
+ /*
+ * Make sure the first 2MB area is not mapped by huge pages
+ * There are typically fixed size MTRRs in there and overlapping
+ * MTRRs into large pages causes slow downs.
+ *
+ * Right now we don't do that with gbpages because there seems
+ * very little benefit for that case.
+ */
+ if (!direct_gbpages)
+ set_memory_4k((unsigned long)__va(0), 1);
+#endif /* CONFIG_X86_64 */
}
diff --git a/arch/x86/kernel/cpu/bugs_64.c b/arch/x86/kernel/cpu/bugs_64.c
deleted file mode 100644
index 9a3ed06..0000000
--- a/arch/x86/kernel/cpu/bugs_64.c
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Copyright (C) 1994 Linus Torvalds
- * Copyright (C) 2000 SuSE
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <asm/alternative.h>
-#include <asm/bugs.h>
-#include <asm/processor.h>
-#include <asm/mtrr.h>
-#include <asm/cacheflush.h>
-
-void __init check_bugs(void)
-{
- identify_boot_cpu();
-#if !defined(CONFIG_SMP)
- printk("CPU: ");
- print_cpu_info(&boot_cpu_data);
-#endif
- alternative_instructions();
-
- /*
- * Make sure the first 2MB area is not mapped by huge pages
- * There are typically fixed size MTRRs in there and overlapping
- * MTRRs into large pages causes slow downs.
- *
- * Right now we don't do that with gbpages because there seems
- * very little benefit for that case.
- */
- if (!direct_gbpages)
- set_memory_4k((unsigned long)__va(0), 1);
-}
diff --git a/arch/x86/kernel/module.c b/arch/x86/kernel/module.c
new file mode 100644
index 0000000..051b4d0
--- /dev/null
+++ b/arch/x86/kernel/module.c
@@ -0,0 +1,261 @@
+/* Kernel module help for x86.
+ Copyright (C) 2001 Rusty Russell.
+ Copyright (C) 2002,2003 Andi Kleen, SuSE Labs.
+
+ 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/moduleloader.h>
+#include <linux/vmalloc.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/bug.h>
+#include <linux/elf.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+
+#include <asm/pgtable.h>
+#include <asm/system.h>
+#include <asm/page.h>
+
+#define DEBUGP(fmt...)
+
+#if (defined(CONFIG_X86_32) || !defined(CONFIG_UML))
+
+#ifdef CONFIG_X86_64
+static inline void *module_vmalloc(unsigned long size)
+{
+ struct vm_struct *area;
+
+ size = PAGE_ALIGN(size);
+ if (size > MODULES_LEN)
+ 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);
+}
+#else
+static inline void *module_vmalloc(unsigned long size)
+{
+ return vmalloc_exec(size);
+}
+#endif
+
+void *module_alloc(unsigned long size)
+{
+ if (size == 0)
+ return NULL;
+ return module_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. */
+}
+#endif
+
+/* We don't need anything special. */
+int module_frob_arch_sections(Elf_Ehdr *hdr,
+ Elf_Shdr *sechdrs,
+ char *secstrings,
+ struct module *mod)
+{
+ return 0;
+}
+
+#ifdef CONFIG_X86_32
+int apply_relocate(Elf32_Shdr *sechdrs,
+ const char *strtab,
+ unsigned int symindex,
+ unsigned int relsec,
+ struct module *me)
+{
+ unsigned int i;
+ Elf32_Rel *rel = (void *)sechdrs[relsec].sh_addr;
+ Elf32_Sym *sym;
+ uint32_t *location;
+
+ DEBUGP("Applying relocate section %u to %u\n", relsec,
+ sechdrs[relsec].sh_info);
+ for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
+ /* This is where to make the change */
+ location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
+ + rel[i].r_offset;
+ /* This is the symbol it is referring to. Note that all
+ undefined symbols have been resolved. */
+ sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
+ + ELF32_R_SYM(rel[i].r_info);
+
+ switch (ELF32_R_TYPE(rel[i].r_info)) {
+ case R_386_32:
+ /* We add the value into the location given */
+ *location += sym->st_value;
+ break;
+ case R_386_PC32:
+ /* Add the value, subtract its postition */
+ *location += sym->st_value - (uint32_t)location;
+ break;
+ default:
+ printk(KERN_ERR "module %s: Unknown relocation: %u\n",
+ me->name, ELF32_R_TYPE(rel[i].r_info));
+ return -ENOEXEC;
+ }
+ }
+ return 0;
+}
+
+int apply_relocate_add(Elf32_Shdr *sechdrs,
+ const char *strtab,
+ unsigned int symindex,
+ unsigned int relsec,
+ struct module *me)
+{
+ printk(KERN_ERR "module %s: add relocation not supported\n", me->name);
+ return -ENOEXEC;
+}
+
+#else /* CONFIG_X86_32 */
+int apply_relocate_add(Elf64_Shdr *sechdrs,
+ const char *strtab,
+ unsigned int symindex,
+ unsigned int relsec,
+ struct module *me)
+{
+ unsigned int i;
+ Elf64_Rela *rel = (void *)sechdrs[relsec].sh_addr;
+ Elf64_Sym *sym;
+ void *loc;
+ u64 val;
+
+ DEBUGP("Applying relocate section %u to %u\n", relsec,
+ sechdrs[relsec].sh_info);
+ for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
+ /* This is where to make the change */
+ loc = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
+ + rel[i].r_offset;
+
+ /*
+ * This is the symbol it is referring to. Note that all
+ * undefined symbols have been resolved.
+ */
+ sym = (Elf64_Sym *)sechdrs[symindex].sh_addr
+ + ELF64_R_SYM(rel[i].r_info);
+
+ DEBUGP("type %d st_value %Lx r_addend %Lx loc %Lx\n",
+ (int)ELF64_R_TYPE(rel[i].r_info),
+ sym->st_value, rel[i].r_addend, (u64)loc);
+
+ val = sym->st_value + rel[i].r_addend;
+
+ switch (ELF64_R_TYPE(rel[i].r_info)) {
+ case R_X86_64_NONE:
+ break;
+ case R_X86_64_64:
+ *(u64 *)loc = val;
+ break;
+ case R_X86_64_32:
+ *(u32 *)loc = val;
+ if (val != *(u32 *)loc)
+ goto overflow;
+ break;
+ case R_X86_64_32S:
+ *(s32 *)loc = val;
+ if ((s64)val != *(s32 *)loc)
+ goto overflow;
+ break;
+ case R_X86_64_PC32:
+ val -= (u64)loc;
+ *(u32 *)loc = val;
+ break;
+ default:
+ printk(KERN_ERR "module %s: Unknown rela relocation: %llu\n",
+ me->name, ELF64_R_TYPE(rel[i].r_info));
+ return -ENOEXEC;
+ }
+ }
+ return 0;
+
+overflow:
+ printk(KERN_ERR "overflow in relocation type %d val %Lx\n",
+ (int)ELF64_R_TYPE(rel[i].r_info), val);
+ printk(KERN_ERR "`%s' likely not compiled with -mcmodel=kernel\n",
+ me->name);
+ return -ENOEXEC;
+}
+
+int apply_relocate(Elf_Shdr *sechdrs,
+ const char *strtab,
+ unsigned int symindex,
+ unsigned int relsec,
+ struct module *me)
+{
+ printk(KERN_ERR "module %s: add relocation not supported\n", me->name);
+ return -ENOSYS;
+}
+
+#endif /* CONFIG_X86_32 */
+
+int module_finalize(const Elf_Ehdr *hdr,
+ const Elf_Shdr *sechdrs,
+ struct module *me)
+{
+ const Elf_Shdr *s, *text = NULL, *alt = NULL, *locks = NULL,
+ *para = NULL;
+ char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
+
+ for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) {
+ if (!strcmp(".text", secstrings + s->sh_name))
+ text = s;
+ if (!strcmp(".altinstructions", secstrings + s->sh_name))
+ alt = s;
+ if (!strcmp(".smp_locks", secstrings + s->sh_name))
+ locks = s;
+ if (!strcmp(".parainstructions", secstrings + s->sh_name))
+ para = s;
+ }
+
+ if (alt) {
+ /* patch .altinstructions */
+ void *aseg = (void *)alt->sh_addr;
+ apply_alternatives(aseg, aseg + alt->sh_size);
+ }
+ if (locks && text) {
+ void *lseg = (void *)locks->sh_addr;
+ void *tseg = (void *)text->sh_addr;
+ alternatives_smp_module_add(me, me->name,
+ lseg, lseg + locks->sh_size,
+ tseg, tseg + text->sh_size);
+ }
+
+ if (para) {
+ void *pseg = (void *)para->sh_addr;
+ apply_paravirt(pseg, pseg + para->sh_size);
+ }
+
+ return module_bug_finalize(hdr, sechdrs, me);
+}
+
+void module_arch_cleanup(struct module *mod)
+{
+ alternatives_smp_module_del(mod);
+ module_bug_cleanup(mod);
+}
diff --git a/arch/x86/kernel/module_32.c b/arch/x86/kernel/module_32.c
deleted file mode 100644
index 0edd819..0000000
--- a/arch/x86/kernel/module_32.c
+++ /dev/null
@@ -1,152 +0,0 @@
-/* Kernel module help for i386.
- 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/moduleloader.h>
-#include <linux/elf.h>
-#include <linux/vmalloc.h>
-#include <linux/fs.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/bug.h>
-
-#if 0
-#define DEBUGP printk
-#else
-#define DEBUGP(fmt...)
-#endif
-
-void *module_alloc(unsigned long size)
-{
- if (size == 0)
- return NULL;
- return vmalloc_exec(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. */
-}
-
-/* We don't need anything special. */
-int module_frob_arch_sections(Elf_Ehdr *hdr,
- Elf_Shdr *sechdrs,
- char *secstrings,
- struct module *mod)
-{
- return 0;
-}
-
-int apply_relocate(Elf32_Shdr *sechdrs,
- const char *strtab,
- unsigned int symindex,
- unsigned int relsec,
- struct module *me)
-{
- unsigned int i;
- Elf32_Rel *rel = (void *)sechdrs[relsec].sh_addr;
- Elf32_Sym *sym;
- uint32_t *location;
-
- DEBUGP("Applying relocate section %u to %u\n", relsec,
- sechdrs[relsec].sh_info);
- for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
- /* This is where to make the change */
- location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
- + rel[i].r_offset;
- /* This is the symbol it is referring to. Note that all
- undefined symbols have been resolved. */
- sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
- + ELF32_R_SYM(rel[i].r_info);
-
- switch (ELF32_R_TYPE(rel[i].r_info)) {
- case R_386_32:
- /* We add the value into the location given */
- *location += sym->st_value;
- break;
- case R_386_PC32:
- /* Add the value, subtract its postition */
- *location += sym->st_value - (uint32_t)location;
- break;
- default:
- printk(KERN_ERR "module %s: Unknown relocation: %u\n",
- me->name, ELF32_R_TYPE(rel[i].r_info));
- return -ENOEXEC;
- }
- }
- return 0;
-}
-
-int apply_relocate_add(Elf32_Shdr *sechdrs,
- const char *strtab,
- unsigned int symindex,
- unsigned int relsec,
- struct module *me)
-{
- printk(KERN_ERR "module %s: ADD RELOCATION unsupported\n",
- me->name);
- return -ENOEXEC;
-}
-
-int module_finalize(const Elf_Ehdr *hdr,
- const Elf_Shdr *sechdrs,
- struct module *me)
-{
- const Elf_Shdr *s, *text = NULL, *alt = NULL, *locks = NULL,
- *para = NULL;
- char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
-
- for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) {
- if (!strcmp(".text", secstrings + s->sh_name))
- text = s;
- if (!strcmp(".altinstructions", secstrings + s->sh_name))
- alt = s;
- if (!strcmp(".smp_locks", secstrings + s->sh_name))
- locks = s;
- if (!strcmp(".parainstructions", secstrings + s->sh_name))
- para = s;
- }
-
- if (alt) {
- /* patch .altinstructions */
- void *aseg = (void *)alt->sh_addr;
- apply_alternatives(aseg, aseg + alt->sh_size);
- }
- if (locks && text) {
- void *lseg = (void *)locks->sh_addr;
- void *tseg = (void *)text->sh_addr;
- alternatives_smp_module_add(me, me->name,
- lseg, lseg + locks->sh_size,
- tseg, tseg + text->sh_size);
- }
-
- if (para) {
- void *pseg = (void *)para->sh_addr;
- apply_paravirt(pseg, pseg + para->sh_size);
- }
-
- return module_bug_finalize(hdr, sechdrs, me);
-}
-
-void module_arch_cleanup(struct module *mod)
-{
- alternatives_smp_module_del(mod);
- module_bug_cleanup(mod);
-}
diff --git a/arch/x86/kernel/module_64.c b/arch/x86/kernel/module_64.c
deleted file mode 100644
index c23880b..0000000
--- a/arch/x86/kernel/module_64.c
+++ /dev/null
@@ -1,194 +0,0 @@
-/* Kernel module help for x86-64
- Copyright (C) 2001 Rusty Russell.
- Copyright (C) 2002,2003 Andi Kleen, SuSE Labs.
-
- 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/moduleloader.h>
-#include <linux/elf.h>
-#include <linux/vmalloc.h>
-#include <linux/fs.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include <linux/bug.h>
-
-#include <asm/system.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-
-#define DEBUGP(fmt...)
-
-#ifndef CONFIG_UML
-void module_free(struct module *mod, void *module_region)
-{
- vfree(module_region);
- /* FIXME: If module_region == mod->init_region, trim exception
- table entries. */
-}
-
-void *module_alloc(unsigned long size)
-{
- struct vm_struct *area;
-
- if (!size)
- return NULL;
- size = PAGE_ALIGN(size);
- if (size > MODULES_LEN)
- 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);
-}
-#endif
-
-/* We don't need anything special. */
-int module_frob_arch_sections(Elf_Ehdr *hdr,
- Elf_Shdr *sechdrs,
- char *secstrings,
- struct module *mod)
-{
- return 0;
-}
-
-int apply_relocate_add(Elf64_Shdr *sechdrs,
- const char *strtab,
- unsigned int symindex,
- unsigned int relsec,
- struct module *me)
-{
- unsigned int i;
- Elf64_Rela *rel = (void *)sechdrs[relsec].sh_addr;
- Elf64_Sym *sym;
- void *loc;
- u64 val;
-
- DEBUGP("Applying relocate section %u to %u\n", relsec,
- sechdrs[relsec].sh_info);
- for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
- /* This is where to make the change */
- loc = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
- + rel[i].r_offset;
-
- /* This is the symbol it is referring to. Note that all
- undefined symbols have been resolved. */
- sym = (Elf64_Sym *)sechdrs[symindex].sh_addr
- + ELF64_R_SYM(rel[i].r_info);
-
- DEBUGP("type %d st_value %Lx r_addend %Lx loc %Lx\n",
- (int)ELF64_R_TYPE(rel[i].r_info),
- sym->st_value, rel[i].r_addend, (u64)loc);
-
- val = sym->st_value + rel[i].r_addend;
-
- switch (ELF64_R_TYPE(rel[i].r_info)) {
- case R_X86_64_NONE:
- break;
- case R_X86_64_64:
- *(u64 *)loc = val;
- break;
- case R_X86_64_32:
- *(u32 *)loc = val;
- if (val != *(u32 *)loc)
- goto overflow;
- break;
- case R_X86_64_32S:
- *(s32 *)loc = val;
- if ((s64)val != *(s32 *)loc)
- goto overflow;
- break;
- case R_X86_64_PC32:
- val -= (u64)loc;
- *(u32 *)loc = val;
-#if 0
- if ((s64)val != *(s32 *)loc)
- goto overflow;
-#endif
- break;
- default:
- printk(KERN_ERR "module %s: Unknown rela relocation: %llu\n",
- me->name, ELF64_R_TYPE(rel[i].r_info));
- return -ENOEXEC;
- }
- }
- return 0;
-
-overflow:
- printk(KERN_ERR "overflow in relocation type %d val %Lx\n",
- (int)ELF64_R_TYPE(rel[i].r_info), val);
- printk(KERN_ERR "`%s' likely not compiled with -mcmodel=kernel\n",
- me->name);
- return -ENOEXEC;
-}
-
-int apply_relocate(Elf_Shdr *sechdrs,
- const char *strtab,
- unsigned int symindex,
- unsigned int relsec,
- struct module *me)
-{
- printk(KERN_ERR "non add relocation not supported\n");
- return -ENOSYS;
-}
-
-int module_finalize(const Elf_Ehdr *hdr,
- const Elf_Shdr *sechdrs,
- struct module *me)
-{
- const Elf_Shdr *s, *text = NULL, *alt = NULL, *locks = NULL,
- *para = NULL;
- char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
-
- for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) {
- if (!strcmp(".text", secstrings + s->sh_name))
- text = s;
- if (!strcmp(".altinstructions", secstrings + s->sh_name))
- alt = s;
- if (!strcmp(".smp_locks", secstrings + s->sh_name))
- locks = s;
- if (!strcmp(".parainstructions", secstrings + s->sh_name))
- para = s;
- }
-
- if (alt) {
- /* patch .altinstructions */
- void *aseg = (void *)alt->sh_addr;
- apply_alternatives(aseg, aseg + alt->sh_size);
- }
- if (locks && text) {
- void *lseg = (void *)locks->sh_addr;
- void *tseg = (void *)text->sh_addr;
- alternatives_smp_module_add(me, me->name,
- lseg, lseg + locks->sh_size,
- tseg, tseg + text->sh_size);
- }
-
- if (para) {
- void *pseg = (void *)para->sh_addr;
- apply_paravirt(pseg, pseg + para->sh_size);
- }
-
- return module_bug_finalize(hdr, sechdrs, me);
-}
-
-void module_arch_cleanup(struct module *mod)
-{
- alternatives_smp_module_del(mod);
- module_bug_cleanup(mod);
-}
--
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