We don't want to map EFI_BOOT_SERVICES_DATA regions, so move the stack from its EFI_BOOT_SERVICES_DATA region to EFI_LOADER_CODE, which we always map. We'll still map the stack as R/W instead of R/X because we split EFI_LOADER_CODE regions on the _etext boundary and map addresses before _etext as R/X and the rest as R/W. Reviewed-by: Nikos Nikoleris <nikos.nikoleris@xxxxxxx> Signed-off-by: Andrew Jones <andrew.jones@xxxxxxxxx> --- arm/efi/crt0-efi-aarch64.S | 22 +++++++++++++++++----- lib/arm/setup.c | 4 ---- lib/memregions.c | 6 ------ 3 files changed, 17 insertions(+), 15 deletions(-) diff --git a/arm/efi/crt0-efi-aarch64.S b/arm/efi/crt0-efi-aarch64.S index 5fd3dc94dae8..71ce2794f059 100644 --- a/arm/efi/crt0-efi-aarch64.S +++ b/arm/efi/crt0-efi-aarch64.S @@ -125,12 +125,18 @@ _start: ldp x0, x1, [sp, #16] - /* Align sp; this is necessary due to way we store cpu0's thread_info */ + /* + * Switch to our own stack and align sp; this is necessary due + * to way we store cpu0's thread_info + */ + adrp x2, stacktop + add x2, x2, :lo12:stacktop + and x2, x2, #THREAD_MASK + mov x3, sp + mov sp, x2 + stp xzr, xzr, [sp, #-16]! mov x29, sp - mov x30, sp - and x30, x30, #THREAD_MASK - mov sp, x30 - str x29, [sp, #-16]! + str x3, [sp, #-16]! bl efi_main @@ -140,3 +146,9 @@ _start: 0: ldp x29, x30, [sp], #32 ret + + .section .data + +.balign 65536 +.space 65536 +stacktop: diff --git a/lib/arm/setup.c b/lib/arm/setup.c index 50a3bb65d865..2f649aff5551 100644 --- a/lib/arm/setup.c +++ b/lib/arm/setup.c @@ -340,10 +340,6 @@ efi_status_t setup_efi(efi_bootinfo_t *efi_bootinfo) { efi_status_t status; - struct thread_info *ti = current_thread_info(); - - memset(ti, 0, sizeof(*ti)); - exceptions_init(); memregions_init(arm_mem_regions, NR_MEM_REGIONS); diff --git a/lib/memregions.c b/lib/memregions.c index 3c6f751eb4f2..53fc0c7cfc58 100644 --- a/lib/memregions.c +++ b/lib/memregions.c @@ -114,12 +114,6 @@ void memregions_efi_init(struct efi_boot_memmap *mem_map, break; case EFI_LOADER_DATA: break; - case EFI_BOOT_SERVICES_DATA: - /* - * FIXME: This would ideally be MR_F_RESERVED, but the - * primary stack is in a region of this EFI type. - */ - break; case EFI_PERSISTENT_MEMORY: r.flags = MR_F_PERSISTENT; break; -- 2.44.0