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authorJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>2009-03-14 23:20:47 -0700
committerJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>2009-03-17 12:58:15 -0700
commit704439ddf9f8ff1fc8c6d8abaac4bc4c95697e39 (patch)
tree51faea24d641a53086d5c37cad9f4cbb0b5c6f0b
parent0b1c723d0bd199300a1a2de57a46000d17577498 (diff)
x86/brk: put the brk reservations in their own section
Impact: disambiguate real .bss variables from .brk storage Add a .brk section after the .bss section. This has no effect on the final vmlinux, but it more clearly distinguishes the space taken by actual .bss symbols, and the variable space reserved by .brk users. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
-rw-r--r--arch/x86/kernel/vmlinux_32.lds.S8
-rw-r--r--arch/x86/kernel/vmlinux_64.lds.S4
2 files changed, 8 insertions, 4 deletions
diff --git a/arch/x86/kernel/vmlinux_32.lds.S b/arch/x86/kernel/vmlinux_32.lds.S
index 98424f33e07..de14973e47f 100644
--- a/arch/x86/kernel/vmlinux_32.lds.S
+++ b/arch/x86/kernel/vmlinux_32.lds.S
@@ -189,16 +189,18 @@ SECTIONS
*(.bss)
. = ALIGN(4);
__bss_stop = .;
+ }
+ .brk : AT(ADDR(.brk) - LOAD_OFFSET) {
. = ALIGN(PAGE_SIZE);
__brk_base = . ;
- . += 64 * 1024 ; /* 64k slop space */
+ . += 64 * 1024 ; /* 64k alignment slop space */
*(.brk_reservation) /* areas brk users have reserved */
__brk_limit = . ;
-
- _end = . ;
}
+ _end = . ;
+
/* Sections to be discarded */
/DISCARD/ : {
*(.exitcall.exit)
diff --git a/arch/x86/kernel/vmlinux_64.lds.S b/arch/x86/kernel/vmlinux_64.lds.S
index 7996687663a..c8742507b03 100644
--- a/arch/x86/kernel/vmlinux_64.lds.S
+++ b/arch/x86/kernel/vmlinux_64.lds.S
@@ -247,10 +247,12 @@ SECTIONS
*(.bss.page_aligned)
*(.bss)
__bss_stop = .;
+ }
+ .brk : AT(ADDR(.brk) - LOAD_OFFSET) {
. = ALIGN(PAGE_SIZE);
__brk_base = . ;
- . += 64 * 1024; /* 64k slop space */
+ . += 64 * 1024 ; /* 64k alignment slop space */
*(.brk_reservation) /* areas brk users have reserved */
__brk_limit = . ;
}