X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fpowerpc%2Fkernel%2Fvdso.c;h=4b3b0fc506f570da451b18aec2b501bef4627216;hb=refs%2Fheads%2Fvserver;hp=1d135e93d376549ed03d67c4c9bb609ebbbd6bde;hpb=16c70f8c1b54b61c3b951b6fb220df250fe09b32;p=linux-2.6.git

diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c
index 1d135e93d..4b3b0fc50 100644
--- a/arch/powerpc/kernel/vdso.c
+++ b/arch/powerpc/kernel/vdso.c
@@ -37,6 +37,8 @@
 #include <asm/vdso.h>
 #include <asm/vdso_datapage.h>
 
+#include "setup.h"
+
 #undef DEBUG
 
 #ifdef DEBUG
@@ -264,7 +266,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm,
 
 
 	/* Allocate a VMA structure and fill it up */
-	vma = kmem_cache_zalloc(vm_area_cachep, SLAB_KERNEL);
+	vma = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL);
 	if (vma == NULL) {
 		rc = -ENOMEM;
 		goto fail_mmapsem;
@@ -284,6 +286,13 @@ int arch_setup_additional_pages(struct linux_binprm *bprm,
 	 * pages though
 	 */
 	vma->vm_flags = VM_READ|VM_EXEC|VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC;
+	/*
+	 * Make sure the vDSO gets into every core dump.
+	 * Dumping its contents makes post-mortem fully interpretable later
+	 * without matching up the same kernel and hardware config to see
+	 * what PC values meant.
+	 */
+	vma->vm_flags |= VM_ALWAYSDUMP;
 	vma->vm_flags |= mm->def_flags;
 	vma->vm_page_prot = protection_map[vma->vm_flags & 0x7];
 	vma->vm_ops = &vdso_vmops;
@@ -588,6 +597,43 @@ static __init int vdso_fixup_datapage(struct lib32_elfinfo *v32,
 	return 0;
 }
 
+
+static __init int vdso_fixup_features(struct lib32_elfinfo *v32,
+				      struct lib64_elfinfo *v64)
+{
+	void *start32;
+	unsigned long size32;
+
+#ifdef CONFIG_PPC64
+	void *start64;
+	unsigned long size64;
+
+	start64 = find_section64(v64->hdr, "__ftr_fixup", &size64);
+	if (start64)
+		do_feature_fixups(cur_cpu_spec->cpu_features,
+				  start64, start64 + size64);
+
+	start64 = find_section64(v64->hdr, "__fw_ftr_fixup", &size64);
+	if (start64)
+		do_feature_fixups(powerpc_firmware_features,
+				  start64, start64 + size64);
+#endif /* CONFIG_PPC64 */
+
+	start32 = find_section32(v32->hdr, "__ftr_fixup", &size32);
+	if (start32)
+		do_feature_fixups(cur_cpu_spec->cpu_features,
+				  start32, start32 + size32);
+
+#ifdef CONFIG_PPC64
+	start32 = find_section32(v32->hdr, "__fw_ftr_fixup", &size32);
+	if (start32)
+		do_feature_fixups(powerpc_firmware_features,
+				  start32, start32 + size32);
+#endif /* CONFIG_PPC64 */
+
+	return 0;
+}
+
 static __init int vdso_fixup_alt_funcs(struct lib32_elfinfo *v32,
 				       struct lib64_elfinfo *v64)
 {
@@ -636,6 +682,9 @@ static __init int vdso_setup(void)
 	if (vdso_fixup_datapage(&v32, &v64))
 		return -1;
 
+	if (vdso_fixup_features(&v32, &v64))
+		return -1;
+
 	if (vdso_fixup_alt_funcs(&v32, &v64))
 		return -1;
 
@@ -716,6 +765,7 @@ void __init vdso_init(void)
 	 * Setup the syscall map in the vDOS
 	 */
 	vdso_setup_syscall_map();
+
 	/*
 	 * Initialize the vDSO images in memory, that is do necessary
 	 * fixups of vDSO symbols, locate trampolines, etc...