43 lines
1.9 KiB
Diff
43 lines
1.9 KiB
Diff
Upstream-Status: Backport
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[Appears to fix the random segfaults we were seeing in a variety of architectures:
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https://bugzilla.yoctoproject.org/show_bug.cgi?id=4216 ]
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From: Yeongkyoon Lee <yeongkyoon.lee@samsung.com>
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Date: Fri, 22 Mar 2013 12:50:17 +0000 (+0900)
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Subject: tcg: Fix occasional TCG broken problem when ldst optimization enabled
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X-Git-Url: http://git.qemu.org/?p=qemu.git;a=commitdiff_plain;h=52ae646d4a3ebdcdcc973492c6a56f2c49b6578f;hp=3f08ffb4a4741d147634761dc053ed386243a0de
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tcg: Fix occasional TCG broken problem when ldst optimization enabled
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is_tcg_gen_code() checks the upper limit of TCG generated code range wrong, so
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that TCG could get broken occasionally only when CONFIG_QEMU_LDST_OPTIMIZATION
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enabled. The reason is code_gen_buffer_max_size does not cover the upper range
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up to (TCG_MAX_OP_SIZE * OPC_BUF_SIZE), thus code_gen_buffer_max_size should be
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modified to code_gen_buffer_size.
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CC: qemu-stable@nongnu.org
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Signed-off-by: Yeongkyoon Lee <yeongkyoon.lee@samsung.com>
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Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
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Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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---
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Index: qemu-1.4.0/translate-all.c
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===================================================================
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--- qemu-1.4.0.orig/translate-all.c 2013-04-09 10:58:19.000000000 +0000
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+++ qemu-1.4.0/translate-all.c 2013-04-09 10:58:34.783203406 +0000
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@@ -1310,10 +1310,10 @@
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/* check whether the given addr is in TCG generated code buffer or not */
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bool is_tcg_gen_code(uintptr_t tc_ptr)
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{
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- /* This can be called during code generation, code_gen_buffer_max_size
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+ /* This can be called during code generation, code_gen_buffer_size
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is used instead of code_gen_ptr for upper boundary checking */
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return (tc_ptr >= (uintptr_t)code_gen_buffer &&
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- tc_ptr < (uintptr_t)(code_gen_buffer + code_gen_buffer_max_size));
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+ tc_ptr < (uintptr_t)(code_gen_buffer + code_gen_buffer_size));
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}
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#endif
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