From e5483b4ffc20614463e42741f132a55d58c01880 Mon Sep 17 00:00:00 2001
From: Jakub Konka <kubkon@jakubkonka.com>
Date: Tue, 13 Feb 2024 10:48:10 +0100
Subject: [PATCH] elf: fix 32bit build

---
 src/link/Elf.zig        | 4 ++--
 src/link/Elf/Object.zig | 4 +++-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/link/Elf.zig b/src/link/Elf.zig
index 9f8c6c1793..7f421d5d26 100644
--- a/src/link/Elf.zig
+++ b/src/link/Elf.zig
@@ -5903,8 +5903,8 @@ fn fmtDumpState(
 }
 
 /// Caller owns the memory.
-pub fn preadAllAlloc(allocator: Allocator, handle: std.fs.File, offset: usize, size: usize) ![]u8 {
-    const buffer = try allocator.alloc(u8, size);
+pub fn preadAllAlloc(allocator: Allocator, handle: std.fs.File, offset: u64, size: u64) ![]u8 {
+    const buffer = try allocator.alloc(u8, math.cast(usize, size) orelse return error.Overflow);
     errdefer allocator.free(buffer);
     const amt = try handle.preadAll(buffer, offset);
     if (amt != size) return error.InputOutput;
diff --git a/src/link/Elf/Object.zig b/src/link/Elf/Object.zig
index 92ac64169a..882025ab8c 100644
--- a/src/link/Elf/Object.zig
+++ b/src/link/Elf/Object.zig
@@ -945,7 +945,9 @@ fn preadShdrContentsAlloc(self: Object, allocator: Allocator, handle: std.fs.Fil
     assert(index < self.shdrs.items.len);
     const offset = if (self.archive) |ar| ar.offset else 0;
     const shdr = self.shdrs.items[index];
-    return Elf.preadAllAlloc(allocator, handle, offset + shdr.sh_offset, shdr.sh_size);
+    const sh_offset = math.cast(u64, shdr.sh_offset) orelse return error.Overflow;
+    const sh_size = math.cast(u64, shdr.sh_size) orelse return error.Overflow;
+    return Elf.preadAllAlloc(allocator, handle, offset + sh_offset, sh_size);
 }
 
 /// Caller owns the memory.