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macho: code signature needs to be 16 bytes aligned

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Jakub Konka 2022-01-14 22:32:33 +01:00 committed by Andrew Kelley
parent e67e15a29a
commit 57d7ad9172
1 changed files with 5 additions and 2 deletions
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7
src/link/MachO.zig
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@ -5774,7 +5774,10 @@ fn writeCodeSignaturePadding(self: *MachO) !void {
const linkedit_segment = &self.load_commands.items[self.linkedit_segment_cmd_index.?].segment;
const code_sig_cmd = &self.load_commands.items[self.code_signature_cmd_index.?].linkedit_data;
const fileoff = linkedit_segment.inner.fileoff + linkedit_segment.inner.filesize;
// Code signature data has to be 16-bytes aligned for Apple tools to recognize the file
// https://github.com/opensource-apple/cctools/blob/fdb4825f303fd5c0751be524babd32958181b3ed/libstuff/checkout.c#L271
const fileoff = mem.alignForwardGeneric(u64, linkedit_segment.inner.fileoff + linkedit_segment.inner.filesize, 16);
const padding = fileoff - (linkedit_segment.inner.fileoff + linkedit_segment.inner.filesize);
const needed_size = CodeSignature.calcCodeSignaturePaddingSize(
self.base.options.emit.?.sub_path,
fileoff,
@ -5784,7 +5787,7 @@ fn writeCodeSignaturePadding(self: *MachO) !void {
code_sig_cmd.datasize = needed_size;
// Advance size of __LINKEDIT segment
linkedit_segment.inner.filesize += needed_size;
linkedit_segment.inner.filesize += needed_size + padding;
if (linkedit_segment.inner.vmsize < linkedit_segment.inner.filesize) {
linkedit_segment.inner.vmsize = mem.alignForwardGeneric(u64, linkedit_segment.inner.filesize, self.page_size);
}