2016-01-03 11:05:27 +00:00
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From a35d5e823fdfe8a6e7e05ca8e3fb8bb5697335b1 Mon Sep 17 00:00:00 2001
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From: Max Filippov <jcmvbkbc@gmail.com>
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Date: Tue, 15 Apr 2014 19:12:46 +0400
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Subject: [PATCH] Fix alignment for the first section frag on xtensa
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Linking object files produced by partial linking with link-time
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relaxation enabled sometimes fails with the following error message:
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dangerous relocation: call8: misaligned call target: (.text.unlikely+0x63)
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This happens because no basic block with an XTENSA_PROP_ALIGN flag in the
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property table is generated for the first basic block, even if the
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.align directive is present.
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It was believed that the first frag alignment could be derived from the
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section alignment, but this was not implemented for the partial linking
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case: after partial linking first frag of a section may become not
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first, but no additional alignment frag is inserted before it.
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Basic block for such frag may be merged with previous basic block into
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extended basic block during relaxation pass losing its alignment
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restrictions.
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Fix this by always recording alignment for the first section frag.
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2014-04-22 Max Filippov <jcmvbkbc@gmail.com>
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gas/
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* config/tc-xtensa.c (xtensa_handle_align): record alignment for the
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first section frag.
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---
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Backported from: a35d5e823fdfe8a6e7e05ca8e3fb8bb5697335b1
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Changes to Changelog files and tests are dropped.
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2017-12-02 20:44:39 +00:00
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gas/config/tc-xtensa.c | 1 -
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2016-01-03 11:05:27 +00:00
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1 file changed, 1 deletion(-)
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--- a/gas/config/tc-xtensa.c
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+++ b/gas/config/tc-xtensa.c
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2017-12-02 20:44:39 +00:00
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@@ -5610,7 +5610,6 @@
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2016-01-03 11:05:27 +00:00
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&& ! fragP->tc_frag_data.is_literal
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&& (fragP->fr_type == rs_align
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|| fragP->fr_type == rs_align_code)
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- && fragP->fr_address + fragP->fr_fix > 0
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&& fragP->fr_offset > 0
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&& now_seg != bss_section)
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{
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