elf: clear dynamic relocs before resolving relocs in atoms

When resolving and writing atoms to file, we may add dynamic relocs
to the output buffer so clear the buffers before that happens.

1 files changed, 4 insertions, 4 deletions

diff --git a/src/link/Elf.zig b/src/link/Elf.zig
index 51987eb9cc..14c532640f 100644
--- a/src/link/Elf.zig
+++ b/src/link/Elf.zig
@@ -987,6 +987,9 @@ pub fn flushModule(self: *Elf, arena: Allocator, tid: Zcu.PerThread.Id, prog_nod
     for (self.objects.items) |index| {
         self.file(index).?.object.dirty = false;
     }
+    // TODO: would state tracking be more appropriate here? perhaps even custom relocation type?
+    self.rela_dyn.clearRetainingCapacity();
+    self.rela_plt.clearRetainingCapacity();
 
     if (self.zigObjectPtr()) |zo| {
         var has_reloc_errors = false;
@@ -1017,6 +1020,7 @@ pub fn flushModule(self: *Elf, arena: Allocator, tid: Zcu.PerThread.Id, prog_nod
     try self.writeShdrTable();
     try self.writeAtoms();
     try self.writeMergeSections();
+
     self.writeSyntheticSections() catch |err| switch (err) {
         error.RelocFailure => return error.FlushFailure,
         error.UnsupportedCpuArch => {
@@ -4236,8 +4240,6 @@ fn writeSyntheticSections(self: *Elf) !void {
     }
 
     if (self.rela_dyn_section_index) |shndx| {
-        // TODO: would state tracking be more appropriate here? perhaps even custom relocation type?
-        self.rela_dyn.clearRetainingCapacity();
         const shdr = slice.items(.shdr)[shndx];
         try self.got.addRela(self);
         try self.copy_rel.addRela(self);
@@ -4270,8 +4272,6 @@ fn writeSyntheticSections(self: *Elf) !void {
     }
 
     if (self.rela_plt_section_index) |shndx| {
-        // TODO: would state tracking be more appropriate here? perhaps even custom relocation type?
-        self.rela_plt.clearRetainingCapacity();
         const shdr = slice.items(.shdr)[shndx];
         try self.plt.addRela(self);
         try self.base.file.?.pwriteAll(mem.sliceAsBytes(self.rela_plt.items), shdr.sh_offset);