diff options
author | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2023-10-11 18:12:53 +0100 |
---|---|---|
committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2024-01-08 12:32:59 +0000 |
commit | a1cc8f6f851d6a4480781dcb431eacedee476cb8 (patch) | |
tree | cd45adf8a31a50d7cfb9b48f5b99094f0629bbfb /arch/arm64/mm/ktext.c | |
parent | 13cd9286564983305e5ca137d964d7781bacfcaa (diff) |
arm64: text replication: handle aarch64_insn_write_literal_u64()
aarch64_insn_write_literal_u64() was introduced in v6.3-rc1 for
updating ftrace ops pointers in the kernel text. This needs to be
fixed up for kernel text replication, so provide a version that
will update the mapping.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch/arm64/mm/ktext.c')
-rw-r--r-- | arch/arm64/mm/ktext.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm64/mm/ktext.c b/arch/arm64/mm/ktext.c index 04b5ceddae4e..0017e7760d36 100644 --- a/arch/arm64/mm/ktext.c +++ b/arch/arm64/mm/ktext.c @@ -17,6 +17,27 @@ static void *kernel_texts[MAX_NUMNODES]; +noinstr void ktext_replication_write(void *addr, void *data, size_t size) +{ + unsigned long offset; + void *ptr; + int nid; + + if (!is_kernel_text((unsigned long)addr)) + return; + + offset = (unsigned long)addr - (unsigned long)_stext; + + for_each_node(nid) { + if (!kernel_texts[nid] || !nid) + continue; + + ptr = kernel_texts[nid] + offset; + + memcpy(ptr, data, size); + } +} + void __kprobes ktext_replication_patch(u32 *tp, __le32 insn) { unsigned long offset; |