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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>
hifive-unleashed-5.1
Jeremy Fitzhardinge 2009-03-14 23:20:47 -07:00
parent 0b1c723d0b
commit 704439ddf9
2 changed files with 8 additions and 4 deletions
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8
arch/x86/kernel/vmlinux_32.lds.S
View File

@ -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)

4
arch/x86/kernel/vmlinux_64.lds.S
View File

@ -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 = . ;
}