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macho: actually set SG_READ_ONLY on __DATA_CONST segment

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This commit is contained in:
Jakub Konka 2024-02-24 18:47:37 +01:00
parent aa39e98d90
commit d7276c1527
1 changed files with 7 additions and 3 deletions
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10
src/link/MachO.zig
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@ -2170,8 +2170,7 @@ fn initSegments(self: *MachO) !void {
for (slice.items(.header)) |header| {
const segname = header.segName();
if (self.getSegmentByName(segname) == null) {
const flags: u32 = if (mem.startsWith(u8, segname, "__DATA_CONST")) macho.SG_READ_ONLY else 0;
_ = try self.addSegment(segname, .{ .prot = getSegmentProt(segname), .flags = flags });
_ = try self.addSegment(segname, .{ .prot = getSegmentProt(segname) });
}
}
@ -2247,6 +2246,12 @@ fn initSegments(self: *MachO) !void {
segment.nsects += 1;
seg_id.* = segment_id;
}
// Set __DATA_CONST as READ_ONLY
if (self.getSegmentByName("__DATA_CONST")) |seg_id| {
const seg = &self.segments.items[seg_id];
seg.flags |= macho.SG_READ_ONLY;
}
}
fn allocateSections(self: *MachO) !void {
@ -3727,7 +3732,6 @@ pub fn addSegment(self: *MachO, name: []const u8, opts: struct {
fileoff: u64 = 0,
filesize: u64 = 0,
prot: macho.vm_prot_t = macho.PROT.NONE,
flags: u32 = 0,
}) error{OutOfMemory}!u8 {
const gpa = self.base.comp.gpa;
const index = @as(u8, @intCast(self.segments.items.len));