LoongArch: Add -mignore-start-align option

Ignore .align at the start of a section may result in misalignment when
partial linking. Manually add -mignore-start-align option without partial
linking.

Gcc -falign-functions add .align 5 to the start of a section, it causes some
error message mismatch. Set these testcases to xfail on LoongArch target.

7 files changed, 43 insertions, 2 deletions

diff --git a/ld/testsuite/ld-elf/dwarf.exp b/ld/testsuite/ld-elf/dwarf.exp
index 6a63269..a4748a4 100644
--- a/ld/testsuite/ld-elf/dwarf.exp
+++ b/ld/testsuite/ld-elf/dwarf.exp
@@ -52,6 +52,9 @@ set build_tests {
   {"DWARF parse during linker error"
    "" "-fno-toplevel-reorder"
    {dwarf2a.c dwarf2b.c} {{error_output "dwarf2.err"}} "dwarf2.x"}
+}
+
+set build_tests_dwarf3 {
   {"Handle no DWARF information"
    "" "-g0"
    {dwarf3.c} {{error_output "dwarf3.err"}} "dwarf3.x"}
@@ -72,6 +75,8 @@ set run_tests {
 set old_CFLAGS "$CFLAGS_FOR_TARGET"
 append CFLAGS_FOR_TARGET " $NOSANITIZE_CFLAGS"
 run_cc_link_tests $build_tests
+setup_xfail loongarch*-*-*
+run_cc_link_tests $build_tests_dwarf3
 run_ld_link_exec_tests $run_tests
 set CFLAGS_FOR_TARGET "$old_CFLAGS"
 
diff --git a/ld/testsuite/ld-loongarch-elf/partial-link-align-a.s b/ld/testsuite/ld-loongarch-elf/partial-link-align-a.s
new file mode 100644
index 0000000..a8b4f29
--- /dev/null
+++ b/ld/testsuite/ld-loongarch-elf/partial-link-align-a.s
@@ -0,0 +1,2 @@
+.text
+la.local $t0, .text
diff --git a/ld/testsuite/ld-loongarch-elf/partial-link-align-b.s b/ld/testsuite/ld-loongarch-elf/partial-link-align-b.s
new file mode 100644
index 0000000..46fa058
--- /dev/null
+++ b/ld/testsuite/ld-loongarch-elf/partial-link-align-b.s
@@ -0,0 +1,3 @@
+.text
+.align 4
+ret
diff --git a/ld/testsuite/ld-loongarch-elf/relax-align-first.d b/ld/testsuite/ld-loongarch-elf/relax-align-ignore-start.d
index 9a4fad8..939cf42 100644
--- a/ld/testsuite/ld-loongarch-elf/relax-align-first.d
+++ b/ld/testsuite/ld-loongarch-elf/relax-align-ignore-start.d
@@ -1,3 +1,4 @@
+#as: -mignore-start-align
 #ld: -e0
 #objdump: -d
 
diff --git a/ld/testsuite/ld-loongarch-elf/relax-align-first.s b/ld/testsuite/ld-loongarch-elf/relax-align-ignore-start.s
index 0a9115b..0a9115b 100644
--- a/ld/testsuite/ld-loongarch-elf/relax-align-first.s
+++ b/ld/testsuite/ld-loongarch-elf/relax-align-ignore-start.s
diff --git a/ld/testsuite/ld-loongarch-elf/relax.exp b/ld/testsuite/ld-loongarch-elf/relax.exp
index 2345214..890f139 100644
--- a/ld/testsuite/ld-loongarch-elf/relax.exp
+++ b/ld/testsuite/ld-loongarch-elf/relax.exp
@@ -19,10 +19,38 @@
 # MA 02110-1301, USA.
 #
 
-if [istarget loongarch64-*-*] {
-  run_dump_test "relax-align-first"
+proc run_partial_linking_align_test {} {
+  global as
+  global ld
+  global srcdir
+  global subdir
+  global runtests
+
+  set testname "partial-link-align"
+  if ![runtest_file_p $runtests $testname] then {
+    return
+  }
 
+  if { ![ld_assemble $as "$srcdir/$subdir/$testname-a.s" tmpdir/a.o]
+      || ![ld_assemble $as "$srcdir/$subdir/$testname-b.s" tmpdir/b.o]
+      || ![ld_link $ld tmpdir/$testname.os "tmpdir/a.o tmpdir/b.o -r"]
+      || ![ld_link $ld tmpdir/$testname "tmpdir/$testname.os -e0 -Ttext 0x1000"] } {
+    fail $testname
+  } else {
+    set objdump_output [run_host_cmd "objdump" "-d tmpdir/$testname"]
+    if { [ regexp ".*1010:\\s*4c000020\\s*jirl.*" $objdump_output ] } {
+      pass $testname
+    } else {
+      fail $testname
+    }
+  }
+}
+
+if [istarget loongarch64-*-*] {
   if [isbuild loongarch64-*-*] {
+    run_dump_test "relax-align-ignore-start"
+    run_partial_linking_align_test
+
     set testname "loongarch relax .exe build"
     set pre_builds [list \
       [list \
diff --git a/ld/testsuite/ld-undefined/undefined.exp b/ld/testsuite/ld-undefined/undefined.exp
index 6f7ea00..2cc67fe 100644
--- a/ld/testsuite/ld-undefined/undefined.exp
+++ b/ld/testsuite/ld-undefined/undefined.exp
@@ -74,6 +74,7 @@ if { ![check_compiler_available] } {
     # in a literal pool outside the function, so that both the
     # "undefined function" and "undefined line" tests fail.
     setup_xfail xtensa*-*-linux*
+    setup_xfail loongarch*-*-*
 
     set mf "tmpdir/undefined.o* in function `function':"
     checkund $mf $testfn
@@ -154,6 +155,7 @@ if { ![check_compiler_available] } {
 
     # eBPF doesn't support dwarf yet.
     setup_xfail bpf-*-*
+    setup_xfail loongarch*-*-*
 
     checkund $ml $testline
 }