[PATCH v1] LoongArch: Disable linker relaxation if set the address of section or segment

[mengqinggang]

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 3bb5ddf0db4..2da40582008 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 00000000000..1bbd85a04bb
--- /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 35caa73c11d..4771f1eb429 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 \
-- 
2.38.1