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[packages/trusty/cirros-testvm.git] / cirros-testvm / src-cirros / buildroot-2015.05 / package / binutils / 2.22 / 905-Fix-trampolines-search-code-for-conditional-branches.patch

diff --git a/cirros-testvm/src-cirros/buildroot-2015.05/package/binutils/2.22/905-Fix-trampolines-search-code-for-conditional-branches.patch b/cirros-testvm/src-cirros/buildroot-2015.05/package/binutils/2.22/905-Fix-trampolines-search-code-for-conditional-branches.patch
new file mode 100644 (file)
index 0000000..8aeb064
--- /dev/null
+++ b/cirros-testvm/src-cirros/buildroot-2015.05/package/binutils/2.22/905-Fix-trampolines-search-code-for-conditional-branches.patch
@@ -0,0 +1,90 @@
+From 415480d6471e67aef97c0241d451ef2423a1da9d Mon Sep 17 00:00:00 2001
+From: Max Filippov <jcmvbkbc@gmail.com>
+Date: Tue, 25 Nov 2014 21:33:21 +0300
+Subject: [PATCH] Fix trampolines search code for conditional branches
+
+For conditional branches that need more than one trampoline to reach its
+target assembler couldn't always find suitable trampoline because
+post-loop condition check was placed inside the loop, resulting in
+premature loop termination. Move check outside the loop.
+
+This fixes the following build errors seen when assembling huge files
+produced by gcc:
+    Error: jump target out of range; no usable trampoline found
+    Error: operand 1 of 'j' has out of range value '307307'
+
+2014-11-25  Max Filippov  <jcmvbkbc@gmail.com>
+
+gas/
+       * config/tc-xtensa.c (search_trampolines): Move post-loop
+       condition check outside the search loop.
+
+gas/testsuite/
+       * gas/xtensa/trampoline.d: Add expected output for branches.
+       * gas/xtensa/trampoline.s: Add test case for branches.
+
+Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
+---
+Backported from: d92b6eece424f0ad35d96fdd85bf207295e8c4c3
+Changes to ChangeLogs are dropped.
+
+ gas/config/tc-xtensa.c                | 8 ++++----
+ gas/testsuite/gas/xtensa/trampoline.d | 9 +++++++++
+ gas/testsuite/gas/xtensa/trampoline.s | 7 +++++++
+ 3 files changed, 20 insertions(+), 4 deletions(-)
+
+diff --git a/gas/config/tc-xtensa.c b/gas/config/tc-xtensa.c
+index d11b0c7..f23ccf8 100644
+--- a/gas/config/tc-xtensa.c
++++ b/gas/config/tc-xtensa.c
+@@ -9514,11 +9514,11 @@ search_trampolines (TInsn *tinsn, fragS *fragP, bfd_boolean unreachable_only)
+             if (next_addr == 0 || addr - next_addr > J_RANGE)
+               break;
+           }
+-        if (abs (addr - this_addr) < J_RANGE)
+-          return tf;
+-
+-        return NULL;
+       }
++      if (abs (addr - this_addr) < J_RANGE)
++      return tf;
++
++      return NULL;
+     }
+   for ( ; tf; tf = tf->next)
+     {
+diff --git a/gas/testsuite/gas/xtensa/trampoline.d b/gas/testsuite/gas/xtensa/trampoline.d
+index b4f65dc..5ae32a6 100644
+--- a/gas/testsuite/gas/xtensa/trampoline.d
++++ b/gas/testsuite/gas/xtensa/trampoline.d
+@@ -24,3 +24,12 @@
+ .*33462:.*j.0x49407
+ #...
+ .*49407:.*j.0x49407
++.*4940a:.*beqz.n.a2,.0x4940f
++.*4940c:.*j.0x693d1
++#...
++.*693d1:.*j.0x7ddd4
++#...
++.*7ddd4:.*j.0x927f5
++#...
++.*927f5:.*j.0x927f5
++#...
+diff --git a/gas/testsuite/gas/xtensa/trampoline.s b/gas/testsuite/gas/xtensa/trampoline.s
+index 259a3bb..4465786 100644
+--- a/gas/testsuite/gas/xtensa/trampoline.s
++++ b/gas/testsuite/gas/xtensa/trampoline.s
+@@ -19,3 +19,10 @@
+       .endr
+ 3:
+       j       3b
++      bnez    a2, 4f
++      .rep    50000
++      and     a2, a2, a3
++      _ret
++      .endr
++4:
++      j       4b
+-- 
+1.8.1.4
+