[S] Change in coreboot[main]: lib/program.ld: Make (NOLOAD) and to_load more explicit

[Nico Huber (Code Review)]

Nico Huber has submitted this change. ( https://review.coreboot.org/c/coreboot/+/80803?usp=email )

Change subject: lib/program.ld: Make (NOLOAD) and to_load more explicit
......................................................................

lib/program.ld: Make (NOLOAD) and to_load more explicit

(NOLOAD) indicates that the section occupies no space in the file, but
does take up space in memory during process execution. It's typically
used for bss sections which contain uninitialized global/static
variables.

to_load makes sure the section is part of the program headers. This is
needed for instance with relocatable stages to know how much memory the
program will use.

Although the BFD linker makes some good guesses making this a NOOP,
other linkers like LLD need to mark these sections more explicitly.

Change-Id: Ic14543ba580abe7a34c69bba714eae8cce504977
Signed-off-by: Arthur Heymans 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80803
Reviewed-by: Nico Huber 
Tested-by: build bot (Jenkins) 
Reviewed-by: Julius Werner 
Reviewed-by: Maximilian Brune 
---
M src/lib/program.ld
1 file changed, 6 insertions(+), 6 deletions(-)

Approvals:
  Nico Huber: Looks good to me, approved
  build bot (Jenkins): Verified
  Julius Werner: Looks good to me, approved
  Maximilian Brune: Looks good to me, approved

diff --git a/src/lib/program.ld b/src/lib/program.ld
index 21f4be8..1784447 100644
--- a/src/lib/program.ld
+++ b/src/lib/program.ld
@@ -68,7 +68,7 @@
    LONG(0);
    LONG(0);
    __CTOR_END__ = .;
-}
+} : to_load
 #endif

/* Include data, bss, and heap in that order. Not defined for all stages. */
@@ -113,11 +113,11 @@
    . = ALIGN(ARCH_POINTER_ALIGN_SIZE);
    _edata = .;
    RECORD_SIZE(data)
-}
+} : to_load
 #endif

#if !ENV_SEPARATE_DATA_AND_BSS
-.bss . : {
+.bss . (NOLOAD) : {
    . = ALIGN(ARCH_POINTER_ALIGN_SIZE);
    _bss = .;
    *(.bss)
@@ -127,18 +127,18 @@
    . = ALIGN(ARCH_POINTER_ALIGN_SIZE);
    _ebss = .;
    RECORD_SIZE(bss)
-}
+} : to_load
 #endif

#if ENV_HAS_HEAP_SECTION
-.heap . : {
+.heap . (NOLOAD) : {
    . = ALIGN(ARCH_POINTER_ALIGN_SIZE);
    _heap = .;
    . += CONFIG_HEAP_SIZE;
    . = ALIGN(ARCH_POINTER_ALIGN_SIZE);
    _eheap = .;
    RECORD_SIZE(heap)
-}
+} : to_load
 #endif

#if ENV_RAMSTAGE && CONFIG(ASAN_IN_RAMSTAGE)