From 9bdf2be420d4477838bfb11d9cd4c2d6ad257119 Mon Sep 17 00:00:00 2001
From: mengqinggang <[email protected]>
Date: Thu, 30 May 2024 19:52:34 +0800
Subject: [PATCH 090/123] LoongArch: Disable linker relaxation if set the
 address of section or segment

If set the address of section or segment, the offset from pc to symbol
may become bigger and cause overflow.
---
 ld/emultempl/loongarchelf.em                | 16 ++++++++++++++++
 ld/testsuite/ld-loongarch-elf/relax-ttext.s | 13 +++++++++++++
 ld/testsuite/ld-loongarch-elf/relax.exp     | 12 ++++++++++++
 3 files changed, 41 insertions(+)
 create mode 100644 ld/testsuite/ld-loongarch-elf/relax-ttext.s

diff --git a/ld/emultempl/loongarchelf.em b/ld/emultempl/loongarchelf.em
index 99749894..13f8dacb 100644
--- a/ld/emultempl/loongarchelf.em
+++ b/ld/emultempl/loongarchelf.em
@@ -25,6 +25,22 @@ fragment <<EOF
 #include "elf/loongarch.h"
 #include "elfxx-loongarch.h"
 
+EOF
+
+# Disable linker relaxation if set address of section or segment.
+PARSE_AND_LIST_ARGS_CASES=${PARSE_AND_LIST_ARGS_CASES}'
+    case OPTION_SECTION_START:
+    case OPTION_TTEXT:
+    case OPTION_TBSS:
+    case OPTION_TDATA:
+    case OPTION_TTEXT_SEGMENT:
+    case OPTION_TRODATA_SEGMENT:
+    case OPTION_TLDATA_SEGMENT:
+      link_info.disable_target_specific_optimizations = 2;
+      return false;
+'
+
+fragment <<EOF
 static void
 larch_elf_before_allocation (void)
 {
diff --git a/ld/testsuite/ld-loongarch-elf/relax-ttext.s b/ld/testsuite/ld-loongarch-elf/relax-ttext.s
new file mode 100644
index 00000000..1bbd85a0
--- /dev/null
+++ b/ld/testsuite/ld-loongarch-elf/relax-ttext.s
@@ -0,0 +1,13 @@
+# At relax pass 0, offset is 0x120204000-0x12000bff8=0x1f8008 < 0x200000
+# At relax pass 1, delete 0x7ff8 bytes NOP,
+# offset is 0x120204000-0x120004000=0x200000 >= 0x200000, overflow
+.text
+.align 14 # delete at relax pass 1
+.fill 0x4000
+.align 14 # delete at relax pass 1
+la.local $t2, a # relax to pcaddi at relax pass 0
+
+.section ".text1", "ax"
+  .fill 0x4000
+a:	     # 0x120204000
+  ret
diff --git a/ld/testsuite/ld-loongarch-elf/relax.exp b/ld/testsuite/ld-loongarch-elf/relax.exp
index 05c4ed0a..05b268f4 100644
--- a/ld/testsuite/ld-loongarch-elf/relax.exp
+++ b/ld/testsuite/ld-loongarch-elf/relax.exp
@@ -51,6 +51,18 @@ if [istarget loongarch64-*-*] {
     run_dump_test "relax-align-ignore-start"
     run_partial_linking_align_test
 
+    run_ld_link_tests \
+	[list \
+	    [list \
+		"loongarch relax ttext" \
+		"" "" \
+		"" \
+		{relax-ttext.s} \
+		{} \
+		"relax-ttext" \
+	    ] \
+	]
+
     set testname "loongarch relax .exe build"
     set pre_builds [list \
       [list \
-- 
2.33.0