[lld] [llvm] [lld][WebAssembly] Support for the custom-page-sizes WebAssembly proposal (PR #128942)

[Sam Clegg via llvm-commits]

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@@ -0,0 +1,42 @@
+# RUN: llvm-mc -filetype=obj -triple=wasm32-unknown-unknown %s -o %t.o
+# RUN: wasm-ld -no-gc-sections -o %t.wasm %t.o --page-size=1
+# RUN: obj2yaml %t.wasm | FileCheck %s
+
+        .section .data.foo,"",@
+foo:
+        .int32  0xffffffff
+        .size   foo, 4
+
+        .section .text._start,"",@
+        .globl  _start
+_start:
+        .functype _start () -> (i32)
+        i32.const __wasm_first_page_end
+        end_function
+
+        .section .data.bar,"",@
+bar:
+        .int32  0x11111111
+        .size   bar, 4
----------------
sbc100 wrote:

I don't think its useful to place data before and after `_start` like this.   Code and data don't interleave like that, and `__wasm_first_page_end` is only created once all objects a read is, its not created in some way in between these data data sections.

If you want to have some data there that is fine but I think `foo` is enough.  If you put the data after `_start` you can also drop the `.section` for `_start`.



https://github.com/llvm/llvm-project/pull/128942