diff options
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/start.S | 4 | ||||
| -rw-r--r-- | arch/arm64/kernel/tashaboot.lds | 10 |
2 files changed, 12 insertions, 2 deletions
diff --git a/arch/arm64/kernel/start.S b/arch/arm64/kernel/start.S index 705721f..2d4b5c0 100644 --- a/arch/arm64/kernel/start.S +++ b/arch/arm64/kernel/start.S @@ -143,8 +143,8 @@ c_entry: 3: isb - /* stack for the bootloader, grows down from the image end */ - ldr x0, =__image_end + /* stack for the bootloader, its own region above the bss */ + ldr x0, =__stack_top mov sp, x0 /* clear bss */ diff --git a/arch/arm64/kernel/tashaboot.lds b/arch/arm64/kernel/tashaboot.lds index 4f8dfb1..4d7adad 100644 --- a/arch/arm64/kernel/tashaboot.lds +++ b/arch/arm64/kernel/tashaboot.lds @@ -52,6 +52,16 @@ SECTIONS . = ALIGN(8); __bss_end = .; + /* + * the stack lives in its own region, clear of bss. page tables + * and buffers are bss objects, a stack sharing their address + * space grows down into them and the first deep call crushes + * whatever it meets. + */ + . = ALIGN(4096); + __stack_bottom = .; + . += 0x4000; + __stack_top = .; __image_copy_end = .; /DISCARD/ : { *(.dynsym) } |