s390: use %r15 instead of %sp

Milad Fa · V8 LUCI CQ · commit 7b91e3e2cbaf · 2025-05-29T12:25:02.000-07:00
Some compilers do not recognize %sp and output: ``` error: invalid register ``` Change-Id: I2e1b64dd0e799a03afccbd12f5b2db17b3130e07 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/6603554 Reviewed-by: Michael Lippautz <mlippautz@chromium.org> Commit-Queue: Milad Farazmand <mfarazma@redhat.com> Reviewed-by: Junliang Yan <junyan@redhat.com> Cr-Commit-Position: refs/heads/main@{#100576}
diff --git a/src/heap/base/asm/s390/push_registers_asm.cc b/src/heap/base/asm/s390/push_registers_asm.cc
@@ -21,17 +21,17 @@ asm(".text                                              \n"
     "PushAllRegistersAndIterateStack:                   \n"
     // Push all callee-saved registers.
     // r6-r13, r14 and sp(r15)
-    "  stmg %r6, %sp, 48(%sp)                           \n"
+    "  stmg %r6, %r15, 48(%r15)                         \n"
     // Allocate frame.
-    "  lay %sp, -160(%sp)                               \n"
+    "  lay %r15, -160(%r15)                             \n"
     // Pass 1st parameter (r2) unchanged (Stack*).
     // Pass 2nd parameter (r3) unchanged (StackVisitor*).
     // Save 3rd parameter (r4; IterateStackCallback).
     "  lgr %r5, %r4                                     \n"
     // Pass sp as 3rd parameter. 160+48 to point
     // to callee saved region stored above.
-    "  lay %r4, 208(%sp)                                \n"
+    "  lay %r4, 208(%r15)                               \n"
     // Call the callback.
     "  basr %r14, %r5                                   \n"
-    "  lmg %r14,%sp, 272(%sp)                           \n"
+    "  lmg %r14,%r15, 272(%r15)                         \n"
     "  br %r14                                          \n");
