From dbaab49f92ff6ae6255762a948375e4036cbdbd2 Mon Sep 17 00:00:00 2001 From: Vivek Goyal Date: Sat, 21 Oct 2006 18:37:03 +0200 Subject: [PATCH] [PATCH] x86-64: Overlapping program headers in physical addr space fix o A recent change to vmlinux.ld.S file broke kexec as now resulting vmlinux program headers are overlapping in physical address space. o Now all the vsyscall related sections are placed after data and after that mostly init data sections are placed. To avoid physical overlap among phdrs, there are three possible solutions. - Place vsyscall sections also in data phdrs instead of user - move vsyscal sections after init data in bss. - create another phdrs say data.init and move all the sections after vsyscall into this new phdr. o This patch implements the third solution. Signed-off-by: Vivek Goyal Signed-off-by: Andi Kleen Cc: Magnus Damm Cc: Andi Kleen Cc: "Eric W. Biederman" Signed-off-by: Andrew Morton --- arch/x86_64/kernel/vmlinux.lds.S | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86_64/kernel/vmlinux.lds.S b/arch/x86_64/kernel/vmlinux.lds.S index b9df2ab6529f..1283614c9b24 100644 --- a/arch/x86_64/kernel/vmlinux.lds.S +++ b/arch/x86_64/kernel/vmlinux.lds.S @@ -17,6 +17,7 @@ PHDRS { text PT_LOAD FLAGS(5); /* R_E */ data PT_LOAD FLAGS(7); /* RWE */ user PT_LOAD FLAGS(7); /* RWE */ + data.init PT_LOAD FLAGS(7); /* RWE */ note PT_NOTE FLAGS(4); /* R__ */ } SECTIONS @@ -131,7 +132,7 @@ SECTIONS . = ALIGN(8192); /* init_task */ .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) { *(.data.init_task) - } :data + }:data.init . = ALIGN(4096); .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {