+++ /dev/null
-From 4fee9f364b9b99f76732f2a6fd6df679a237fa74 Mon Sep 17 00:00:00 2001
-From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
-Date: Mon, 16 Nov 2015 11:18:14 +0100
-Subject: arm64: mm: use correct mapping granularity under DEBUG_RODATA
-
-From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
-
-commit 4fee9f364b9b99f76732f2a6fd6df679a237fa74 upstream.
-
-When booting a 64k pages kernel that is built with CONFIG_DEBUG_RODATA
-and resides at an offset that is not a multiple of 512 MB, the rounding
-that occurs in __map_memblock() and fixup_executable() results in
-incorrect regions being mapped.
-
-The following snippet from /sys/kernel/debug/kernel_page_tables shows
-how, when the kernel is loaded 2 MB above the base of DRAM at 0x40000000,
-the first 2 MB of memory (which may be inaccessible from non-secure EL1
-or just reserved by the firmware) is inadvertently mapped into the end of
-the module region.
-
- ---[ Modules start ]---
- 0xfffffdffffe00000-0xfffffe0000000000 2M RW NX ... UXN MEM/NORMAL
- ---[ Modules end ]---
- ---[ Kernel Mapping ]---
- 0xfffffe0000000000-0xfffffe0000090000 576K RW NX ... UXN MEM/NORMAL
- 0xfffffe0000090000-0xfffffe0000200000 1472K ro x ... UXN MEM/NORMAL
- 0xfffffe0000200000-0xfffffe0000800000 6M ro x ... UXN MEM/NORMAL
- 0xfffffe0000800000-0xfffffe0000810000 64K ro x ... UXN MEM/NORMAL
- 0xfffffe0000810000-0xfffffe0000a00000 1984K RW NX ... UXN MEM/NORMAL
- 0xfffffe0000a00000-0xfffffe00ffe00000 4084M RW NX ... UXN MEM/NORMAL
-
-The same issue is likely to occur on 16k pages kernels whose load
-address is not a multiple of 32 MB (i.e., SECTION_SIZE). So round to
-SWAPPER_BLOCK_SIZE instead of SECTION_SIZE.
-
-Fixes: da141706aea5 ("arm64: add better page protections to arm64")
-Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
-Acked-by: Mark Rutland <mark.rutland@arm.com>
-Acked-by: Laura Abbott <labbott@redhat.com>
-Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-
----
- arch/arm64/mm/mmu.c | 12 ++++++------
- 1 file changed, 6 insertions(+), 6 deletions(-)
-
---- a/arch/arm64/mm/mmu.c
-+++ b/arch/arm64/mm/mmu.c
-@@ -307,8 +307,8 @@ static void __init __map_memblock(phys_a
- * for now. This will get more fine grained later once all memory
- * is mapped
- */
-- unsigned long kernel_x_start = round_down(__pa(_stext), SECTION_SIZE);
-- unsigned long kernel_x_end = round_up(__pa(__init_end), SECTION_SIZE);
-+ unsigned long kernel_x_start = round_down(__pa(_stext), SWAPPER_BLOCK_SIZE);
-+ unsigned long kernel_x_end = round_up(__pa(__init_end), SWAPPER_BLOCK_SIZE);
-
- if (end < kernel_x_start) {
- create_mapping(start, __phys_to_virt(start),
-@@ -396,18 +396,18 @@ void __init fixup_executable(void)
- {
- #ifdef CONFIG_DEBUG_RODATA
- /* now that we are actually fully mapped, make the start/end more fine grained */
-- if (!IS_ALIGNED((unsigned long)_stext, SECTION_SIZE)) {
-+ if (!IS_ALIGNED((unsigned long)_stext, SWAPPER_BLOCK_SIZE)) {
- unsigned long aligned_start = round_down(__pa(_stext),
-- SECTION_SIZE);
-+ SWAPPER_BLOCK_SIZE);
-
- create_mapping(aligned_start, __phys_to_virt(aligned_start),
- __pa(_stext) - aligned_start,
- PAGE_KERNEL);
- }
-
-- if (!IS_ALIGNED((unsigned long)__init_end, SECTION_SIZE)) {
-+ if (!IS_ALIGNED((unsigned long)__init_end, SWAPPER_BLOCK_SIZE)) {
- unsigned long aligned_end = round_up(__pa(__init_end),
-- SECTION_SIZE);
-+ SWAPPER_BLOCK_SIZE);
- create_mapping(__pa(__init_end), (unsigned long)__init_end,
- aligned_end - __pa(__init_end),
- PAGE_KERNEL);
--- /dev/null
+From c84da8b9ad3761eef43811181c7e896e9834b26b Mon Sep 17 00:00:00 2001
+From: libin <huawei.libin@huawei.com>
+Date: Tue, 3 Nov 2015 08:58:47 +0800
+Subject: recordmcount: Fix endianness handling bug for nop_mcount
+
+From: libin <huawei.libin@huawei.com>
+
+commit c84da8b9ad3761eef43811181c7e896e9834b26b upstream.
+
+In nop_mcount, shdr->sh_offset and welp->r_offset should handle
+endianness properly, otherwise it will trigger Segmentation fault
+if the recordmcount main and file.o have different endianness.
+
+Link: http://lkml.kernel.org/r/563806C7.7070606@huawei.com
+
+Signed-off-by: Li Bin <huawei.libin@huawei.com>
+Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ scripts/recordmcount.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/scripts/recordmcount.h
++++ b/scripts/recordmcount.h
+@@ -377,7 +377,7 @@ static void nop_mcount(Elf_Shdr const *c
+
+ if (mcountsym == Elf_r_sym(relp) && !is_fake_mcount(relp)) {
+ if (make_nop)
+- ret = make_nop((void *)ehdr, shdr->sh_offset + relp->r_offset);
++ ret = make_nop((void *)ehdr, _w(shdr->sh_offset) + _w(relp->r_offset));
+ if (warn_on_notrace_sect && !once) {
+ printf("Section %s has mcount callers being ignored\n",
+ txtname);
projects / thirdparty / kernel / stable-queue.git / commitdiff
