Commit e2a2e6c14f

Jonathan Marler <johnnymarler@gmail.com>
2021-10-18 23:54:56
InstallRawStep: handle empty segments
This fixes InstallRawStep to handle the cases when there are empty segments (segments with no sections). Before this change, if there was an empty segment with no sections, then the fixup of binaryOffsets is skipped. This fixes that by looping through each segment until a non-empty one is found and then fixing up the sections. This fixed an issue I was having with InstallRawStep for a bootloader I'm writing.
master
1 parent da2b615
Changed files (1)
lib
std
build
InstallRawStep.zig
lib/std/build/InstallRawStep.zig
@@ -96,8 +96,7 @@ const BinaryElfOutput = struct {
 
         sort.sort(*BinaryElfSegment, self.segments.items, {}, segmentSortCompare);
 
-        if (self.segments.items.len > 0) {
-            const firstSegment = self.segments.items[0];
+        for (self.segments.items) |firstSegment, i| {
             if (firstSegment.firstSection) |firstSection| {
                 const diff = firstSection.elfOffset - firstSegment.elfOffset;
 
@@ -107,9 +106,10 @@ const BinaryElfOutput = struct {
 
                 const basePhysicalAddress = firstSegment.physicalAddress;
 
-                for (self.segments.items) |segment| {
+                for (self.segments.items[i + 1 ..]) |segment| {
                     segment.binaryOffset = segment.physicalAddress - basePhysicalAddress;
                 }
+                break;
             }
         }