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82 lines
2.2 KiB
Diff
82 lines
2.2 KiB
Diff
From 415480d6471e67aef97c0241d451ef2423a1da9d Mon Sep 17 00:00:00 2001
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From: Max Filippov <jcmvbkbc@gmail.com>
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Date: Tue, 25 Nov 2014 21:33:21 +0300
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Subject: [PATCH] Fix trampolines search code for conditional branches
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For conditional branches that need more than one trampoline to reach its
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target assembler couldn't always find suitable trampoline because
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post-loop condition check was placed inside the loop, resulting in
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premature loop termination. Move check outside the loop.
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This fixes the following build errors seen when assembling huge files
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produced by gcc:
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Error: jump target out of range; no usable trampoline found
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Error: operand 1 of 'j' has out of range value '307307'
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2014-11-25 Max Filippov <jcmvbkbc@gmail.com>
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gas/
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* config/tc-xtensa.c (search_trampolines): Move post-loop
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condition check outside the search loop.
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gas/testsuite/
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* gas/xtensa/trampoline.d: Add expected output for branches.
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* gas/xtensa/trampoline.s: Add test case for branches.
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Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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---
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Backported from: d92b6eece424f0ad35d96fdd85bf207295e8c4c3
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Changes to ChangeLogs are dropped.
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gas/config/tc-xtensa.c | 8 ++++----
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gas/testsuite/gas/xtensa/trampoline.d | 9 +++++++++
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gas/testsuite/gas/xtensa/trampoline.s | 7 +++++++
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3 files changed, 20 insertions(+), 4 deletions(-)
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--- a/gas/config/tc-xtensa.c
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+++ b/gas/config/tc-xtensa.c
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@@ -9515,11 +9515,11 @@
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if (next_addr == 0 || addr - next_addr > J_RANGE)
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break;
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}
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- if (abs (addr - this_addr) < J_RANGE)
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- return tf;
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-
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- return NULL;
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}
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+ if (abs (addr - this_addr) < J_RANGE)
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+ return tf;
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+
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+ return NULL;
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}
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for ( ; tf; tf = tf->next)
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{
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--- a/gas/testsuite/gas/xtensa/trampoline.d
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+++ b/gas/testsuite/gas/xtensa/trampoline.d
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@@ -24,3 +24,12 @@
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.*33462:.*j.0x49407
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#...
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.*49407:.*j.0x49407
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+.*4940a:.*beqz.n.a2,.0x4940f
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+.*4940c:.*j.0x693d1
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+#...
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+.*693d1:.*j.0x7ddd4
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+#...
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+.*7ddd4:.*j.0x927f5
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+#...
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+.*927f5:.*j.0x927f5
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+#...
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--- a/gas/testsuite/gas/xtensa/trampoline.s
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+++ b/gas/testsuite/gas/xtensa/trampoline.s
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@@ -19,3 +19,10 @@
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.endr
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3:
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j 3b
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+ bnez a2, 4f
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+ .rep 50000
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+ and a2, a2, a3
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+ _ret
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+ .endr
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+4:
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+ j 4b
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