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137 lines
4.6 KiB
Diff
137 lines
4.6 KiB
Diff
From 7db2accc3fdea0aaa0c3a76a413d8e8030e022c3 Mon Sep 17 00:00:00 2001
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From: Max Filippov <jcmvbkbc@gmail.com>
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Date: Tue, 16 Feb 2016 02:23:28 +0300
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Subject: [PATCH] xtensa: fix .init/.fini literals moving
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Despite the documentation and the comment in xtensa_move_literals, in
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the presence of --text-section-literals and --auto-litpools literals are
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moved from the separate literal sections into .init and .fini, because
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the check in the xtensa_move_literals is incorrect.
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This moving was broken with introduction of auto litpools: some literals
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now may be lost. This happens because literal frags emitted from .init
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and .fini are not closed when new .literal_position marks new literal
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pool. Then frag_align(2, 0, 0) changes type of the last literal frag to
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rs_align. rs_align frags are skipped in the xtensa_move_literals. As a
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result fixups against such literals are not moved out of .init.literal/
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.fini.literal sections producing the following assembler error:
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test.S: Warning: fixes not all moved from .init.literal
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test.S: Internal error!
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Fix check for .init.literal/.fini.literal in the xtensa_move_literals
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and don't let it move literals from there in the presence of
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--text-section-literals or --auto-litpools.
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2016-02-17 Max Filippov <jcmvbkbc@gmail.com>
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gas/
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* config/tc-xtensa.c (xtensa_move_literals): Fix check for
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.init.literal/.fini.literal section name.
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* testsuite/gas/xtensa/all.exp: Add init-fini-literals to the
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list of xtensa tests.
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* testsuite/gas/xtensa/init-fini-literals.d: New file:
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init-fini-literals test result patterns.
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* testsuite/gas/xtensa/init-fini-literals.s: New file:
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init-fini-literals test.
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Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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---
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Backported from: 4111950f363221c4641dc2f33bea61cc94f34906
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gas/config/tc-xtensa.c | 12 ++++++++++--
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gas/testsuite/gas/xtensa/all.exp | 1 +
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gas/testsuite/gas/xtensa/init-fini-literals.d | 24 ++++++++++++++++++++++++
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gas/testsuite/gas/xtensa/init-fini-literals.s | 19 +++++++++++++++++++
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4 files changed, 54 insertions(+), 2 deletions(-)
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create mode 100644 gas/testsuite/gas/xtensa/init-fini-literals.d
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create mode 100644 gas/testsuite/gas/xtensa/init-fini-literals.s
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--- a/gas/config/tc-xtensa.c
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+++ b/gas/config/tc-xtensa.c
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@@ -11061,6 +11061,10 @@
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fixS *fix, *next_fix, **fix_splice;
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sym_list *lit;
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struct litpool_seg *lps;
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+ const char *init_name = INIT_SECTION_NAME;
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+ const char *fini_name = FINI_SECTION_NAME;
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+ int init_name_len = strlen(init_name);
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+ int fini_name_len = strlen(fini_name);
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mark_literal_frags (literal_head->next);
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@@ -11171,9 +11175,13 @@
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for (segment = literal_head->next; segment; segment = segment->next)
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{
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+ const char *seg_name = segment_name (segment->seg);
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+
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/* Keep the literals for .init and .fini in separate sections. */
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- if (!strcmp (segment_name (segment->seg), INIT_SECTION_NAME)
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- || !strcmp (segment_name (segment->seg), FINI_SECTION_NAME))
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+ if ((!memcmp (seg_name, init_name, init_name_len) &&
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+ !strcmp (seg_name + init_name_len, ".literal")) ||
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+ (!memcmp (seg_name, fini_name, fini_name_len) &&
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+ !strcmp (seg_name + fini_name_len, ".literal")))
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continue;
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frchain_from = seg_info (segment->seg)->frchainP;
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--- a/gas/testsuite/gas/xtensa/all.exp
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+++ b/gas/testsuite/gas/xtensa/all.exp
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@@ -102,6 +102,7 @@
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run_dump_test "first_frag_align"
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run_dump_test "auto-litpools"
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run_dump_test "loc"
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+ run_dump_test "init-fini-literals"
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}
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if [info exists errorInfo] then {
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--- /dev/null
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+++ b/gas/testsuite/gas/xtensa/init-fini-literals.d
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@@ -0,0 +1,24 @@
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+#as: --text-section-literals
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+#objdump: -r
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+#name: check that literals for .init and .fini always go to separate sections
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+
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+.*: +file format .*xtensa.*
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+#...
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+RELOCATION RECORDS FOR \[\.init\.literal\]:
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+#...
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+00000000 R_XTENSA_PLT init
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+#...
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+RELOCATION RECORDS FOR \[\.fini\.literal\]:
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+#...
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+00000000 R_XTENSA_PLT fini
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+#...
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+RELOCATION RECORDS FOR \[\.init\]:
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+#...
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+.* R_XTENSA_SLOT0_OP \.init\.literal
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+.* R_XTENSA_SLOT0_OP \.init\.literal\+0x00000004
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+#...
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+RELOCATION RECORDS FOR \[\.fini\]:
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+#...
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+.* R_XTENSA_SLOT0_OP \.fini\.literal
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+.* R_XTENSA_SLOT0_OP \.fini\.literal\+0x00000004
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+#...
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--- /dev/null
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+++ b/gas/testsuite/gas/xtensa/init-fini-literals.s
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@@ -0,0 +1,19 @@
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+ .section .init,"ax",@progbits
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+ .literal_position
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+ .literal .LC0, init@PLT
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+ .literal_position
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+ .literal .LC1, 1
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+ .align 4
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+
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+ l32r a2, .LC0
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+ l32r a2, .LC1
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+
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+ .section .fini,"ax",@progbits
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+ .literal_position
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+ .literal .LC2, fini@PLT
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+ .literal_position
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+ .literal .LC3, 1
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+ .align 4
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+
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+ l32r a2, .LC2
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+ l32r a2, .LC3
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