diff options
Diffstat (limited to 'arch/arm/lib/relocate_64.S')
| -rw-r--r-- | arch/arm/lib/relocate_64.S | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/arch/arm/lib/relocate_64.S b/arch/arm/lib/relocate_64.S index fdba004363..04804524ed 100644 --- a/arch/arm/lib/relocate_64.S +++ b/arch/arm/lib/relocate_64.S @@ -27,11 +27,24 @@ ENTRY(relocate_code) /* * Copy u-boot from flash to RAM */ - ldr x1, =__image_copy_start /* x1 <- SRC &__image_copy_start */ - subs x9, x0, x1 /* x9 <- relocation offset */ + adr x1, __image_copy_start /* x1 <- Run &__image_copy_start */ + subs x9, x0, x1 /* x8 <- Run to copy offset */ b.eq relocate_done /* skip relocation */ - ldr x2, =__image_copy_end /* x2 <- SRC &__image_copy_end */ + /* + * Don't ldr x1, __image_copy_start here, since if the code is already + * running at an address other than it was linked to, that instruction + * will load the relocated value of __image_copy_start. To + * correctly apply relocations, we need to know the linked value. + * + * Linked &__image_copy_start, which we know was at + * CONFIG_SYS_TEXT_BASE, which is stored in _TEXT_BASE, as a non- + * relocated value, since it isn't a symbol reference. + */ + ldr x1, _TEXT_BASE /* x1 <- Linked &__image_copy_start */ + subs x9, x0, x1 /* x9 <- Link to copy offset */ + adr x1, __image_copy_start /* x1 <- Run &__image_copy_start */ + adr x2, __image_copy_end /* x2 <- Run &__image_copy_end */ copy_loop: ldp x10, x11, [x1], #16 /* copy from source address [x1] */ stp x10, x11, [x0], #16 /* copy to target address [x0] */ @@ -42,8 +55,8 @@ copy_loop: /* * Fix .rela.dyn relocations */ - ldr x2, =__rel_dyn_start /* x2 <- SRC &__rel_dyn_start */ - ldr x3, =__rel_dyn_end /* x3 <- SRC &__rel_dyn_end */ + adr x2, __rel_dyn_start /* x2 <- Run &__rel_dyn_start */ + adr x3, __rel_dyn_end /* x3 <- Run &__rel_dyn_end */ fixloop: ldp x0, x1, [x2], #16 /* (x0,x1) <- (SRC location, fixup) */ ldr x4, [x2], #8 /* x4 <- addend */ |