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Date: Fri, 24 Jul 2009 17:15:22 +0900 From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, xiyou.wangcong@...il.com, "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>, ralf@...ux-mips.org, benh@...nel.crashing.org, lethal@...ux-sh.org Subject: [RFC][PATCH 4/6] kcore: kcore unify text range entry From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> Some 64bit arch has a special segment for mapping kernel text. It should be entried to /proc/kcore in addtion to direct-linear-map, vmalloc area. This patch unifies KCORE_TEXT entry scattered under x86 and ia64. I'm not familiar with other archs (mips has its own even after this patch) If range of [_stext ..._end) is a valid area of text/data and it's not in direct-map/vmalloc area, defining CONFIG_ARCH_PROC_KCORE_TEXT is only a necessary thing to do for archs. Note: I left mips-64 as it is now. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> --- Index: mmotm-2.6.31-Jul16/arch/x86/Kconfig =================================================================== --- mmotm-2.6.31-Jul16.orig/arch/x86/Kconfig +++ mmotm-2.6.31-Jul16/arch/x86/Kconfig @@ -1244,6 +1244,10 @@ config ARCH_MEMORY_PROBE def_bool X86_64 depends on MEMORY_HOTPLUG +config ARCH_PROC_KCORE_TEXT + def_bool y + depends on X86_64 && PROC_KCORE + config ILLEGAL_POINTER_VALUE hex default 0 if X86_32 Index: mmotm-2.6.31-Jul16/arch/ia64/Kconfig =================================================================== --- mmotm-2.6.31-Jul16.orig/arch/ia64/Kconfig +++ mmotm-2.6.31-Jul16/arch/ia64/Kconfig @@ -496,6 +496,10 @@ config HAVE_ARCH_NODEDATA_EXTENSION def_bool y depends on NUMA +config ARCH_PROC_KCORE_TEXT + def_bool y + depends on PROC_KCORE + config IA32_SUPPORT bool "Support for Linux/x86 binaries" help Index: mmotm-2.6.31-Jul16/arch/ia64/mm/init.c =================================================================== --- mmotm-2.6.31-Jul16.orig/arch/ia64/mm/init.c +++ mmotm-2.6.31-Jul16/arch/ia64/mm/init.c @@ -617,7 +617,6 @@ mem_init (void) long reserved_pages, codesize, datasize, initsize; pg_data_t *pgdat; int i; - static struct kcore_list kcore_kernel; BUG_ON(PTRS_PER_PGD * sizeof(pgd_t) != PAGE_SIZE); BUG_ON(PTRS_PER_PMD * sizeof(pmd_t) != PAGE_SIZE); @@ -637,7 +636,6 @@ mem_init (void) max_mapnr = max_low_pfn; #endif high_memory = __va(max_low_pfn * PAGE_SIZE); - kclist_add(&kcore_kernel, _stext, _end - _stext, KCORE_TEXT); for_each_online_pgdat(pgdat) if (pgdat->bdata->node_bootmem_map) Index: mmotm-2.6.31-Jul16/arch/x86/mm/init_64.c =================================================================== --- mmotm-2.6.31-Jul16.orig/arch/x86/mm/init_64.c +++ mmotm-2.6.31-Jul16/arch/x86/mm/init_64.c @@ -647,8 +647,7 @@ EXPORT_SYMBOL_GPL(memory_add_physaddr_to #endif /* CONFIG_MEMORY_HOTPLUG */ -static struct kcore_list kcore_mem, kcore_kernel, - kcore_modules, kcore_vsyscall; +static struct kcore_list kcore_mem, kcore_modules, kcore_vsyscall; void __init mem_init(void) { @@ -678,7 +677,6 @@ void __init mem_init(void) /* Register memory areas for /proc/kcore */ kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT, KCORE_RAM); - kclist_add(&kcore_kernel, &_stext, _end - _stext, KCORE_TEXT); kclist_add(&kcore_modules, (void *)MODULES_VADDR, MODULES_LEN, KCORE_OTHER); kclist_add(&kcore_vsyscall, (void *)VSYSCALL_START, Index: mmotm-2.6.31-Jul16/fs/proc/kcore.c =================================================================== --- mmotm-2.6.31-Jul16.orig/fs/proc/kcore.c +++ mmotm-2.6.31-Jul16/fs/proc/kcore.c @@ -21,6 +21,7 @@ #include <asm/uaccess.h> #include <asm/io.h> #include <linux/list.h> +#include <asm/sections.h> #define CORE_STR "CORE" @@ -408,10 +409,26 @@ read_kcore(struct file *file, char __use static struct kcore_list kcore_vmalloc; +#ifdef CONFIG_ARCH_PROC_KCORE_TEXT +static struct kcore_list kcore_text; +/* + * If defined, special segment is used for mapping kernel text instead of + * direct-map area. We need to create special TEXT section. + */ +static void __init proc_kcore_text_init(void) +{ + kclist_add(&kcore_text, _stext, _end - _stext, KCORE_TEXT); +} +#else +static void __init proc_kcore_text_init(void) +{ +} +#endif + static int __init proc_kcore_init(void) { proc_root_kcore = proc_create("kcore", S_IRUSR, NULL, &proc_kcore_operations); - + proc_kcore_text_init(); kclist_add(&kcore_vmalloc, (void *)VMALLOC_START, VMALLOC_END - VMALLOC_START, KCORE_VMALLOC); return 0; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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