| Message ID | 20190916113056.16592-5-wipawel@amazon.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | livepatch-build-tools: new features and fixes | expand |
On 9/16/19 12:30 PM, Pawel Wieczorkiewicz wrote: > With version 2 of a payload structure additional field is supported > to track whether given function has been applied or reverted. > There also comes additional 8-byte alignment padding to reserve > place for future flags and options. > > The new fields are zero-out upon .livepatch.funcs section creation. > > Signed-off-by: Pawel Wieczorkiewicz <wipawel@amazon.de> Reviewed-by: Ross Lagerwall <ross.lagerwall@citrix.com>
diff --git a/common.h b/common.h index 06e19e7..d8cde35 100644 --- a/common.h +++ b/common.h @@ -124,6 +124,8 @@ struct livepatch_patch_func { uint32_t old_size; uint8_t version; unsigned char pad[31]; + uint8_t applied; + uint8_t _pad[7]; }; struct special_section { diff --git a/create-diff-object.c b/create-diff-object.c index 9918b6e..d518503 100644 --- a/create-diff-object.c +++ b/create-diff-object.c @@ -2014,8 +2014,10 @@ static void livepatch_create_patches_sections(struct kpatch_elf *kelf, funcs[index].old_size = result.size; funcs[index].new_addr = 0; funcs[index].new_size = sym->sym.st_size; - funcs[index].version = 1; + funcs[index].version = 2; memset(funcs[index].pad, 0, sizeof funcs[index].pad); + funcs[index].applied = 0; + memset(funcs[index]._pad, 0, sizeof funcs[index]._pad); /* * Add a relocation that will populate
With version 2 of a payload structure additional field is supported to track whether given function has been applied or reverted. There also comes additional 8-byte alignment padding to reserve place for future flags and options. The new fields are zero-out upon .livepatch.funcs section creation. Signed-off-by: Pawel Wieczorkiewicz <wipawel@amazon.de> --- common.h | 2 ++ create-diff-object.c | 4 +++- 2 files changed, 5 insertions(+), 1 deletion(-)