artiq/artiq/compiler/kernel.ld
David Nadlinger dee154b35b compiler: Add missing sections to kernel linker script
This caused sporadic LoadFaults with LLD 14 and above, as they
happened to lay out the (not otherwise mentioned) GOT/PLT such
that they would overlap with the stack guard page.

LLD does support the --orphan-handling=error option, which
would be useful to avoid similar problems in the future, but
then we'd need to mention all the other misc sections
(symbol table, comments) in the linker script as well.

GitHub: Fixes #1975.
2022-11-24 16:57:31 +00:00

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/* Force ld to make the ELF header as loadable. */
PHDRS
{
headers PT_LOAD FILEHDR PHDRS ;
text PT_LOAD ;
data PT_LOAD ;
dynamic PT_DYNAMIC ;
eh_frame PT_GNU_EH_FRAME ;
}
SECTIONS
{
/* Push back .text section enough so that ld.lld not complain */
. = SIZEOF_HEADERS;
.text :
{
*(.text .text.*)
} : text
.rodata :
{
*(.rodata .rodata.*)
}
.eh_frame :
{
KEEP(*(.eh_frame))
} : text
.eh_frame_hdr :
{
KEEP(*(.eh_frame_hdr))
} : text : eh_frame
.got :
{
*(.got)
} : text
.got.plt :
{
*(.got.plt)
} : text
.data :
{
*(.data .data.*)
} : data
.dynamic :
{
*(.dynamic)
} : data : dynamic
.bss (NOLOAD) : ALIGN(4)
{
__bss_start = .;
*(.sbss .sbss.* .bss .bss.*);
. = ALIGN(4);
_end = .;
}
/* Kernel stack grows downward from end of memory, so put guard page after
* all the program contents. Note: This requires all loaded sections (at
* least those accessed) to be explicitly listed in the above!
*/
. = ALIGN(0x1000);
_sstack_guard = .;
}