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From 59aadb4f5b15eff968ed00ad29816ac19bef507d Mon Sep 17 00:00:00 2001
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From: Richard Henderson <rth@twiddle.net>
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Date: Fri, 21 Sep 2012 10:40:48 -0700
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Subject: [PATCH] tcg-sparc: Don't MAP_FIXED on top of the program
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The address we pick in sparc64.ld is also 0x60000000, so doing a fixed map
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on top of that is guaranteed to blow up. Choosing 0x40000000 is exactly
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right for the max of code_gen_buffer_size set below.
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No need to ever use MAP_FIXED. While getting our desired address helps
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optimize the generated code, we won't fail if we don't get it.
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Signed-off-by: Richard Henderson <rth@twiddle.net>
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Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
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---
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exec.c | 6 ++----
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1 file changed, 2 insertions(+), 4 deletions(-)
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diff --git a/exec.c b/exec.c
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index 5834766..871a68a 100644
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--- a/exec.c
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+++ b/exec.c
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@@ -543,8 +543,7 @@ static void code_gen_alloc(unsigned long tb_size)
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code_gen_buffer_size = (800 * 1024 * 1024);
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#elif defined(__sparc_v9__)
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// Map the buffer below 2G, so we can use direct calls and branches
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- flags |= MAP_FIXED;
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- start = (void *) 0x60000000UL;
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+ start = (void *) 0x40000000UL;
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if (code_gen_buffer_size > (512 * 1024 * 1024))
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code_gen_buffer_size = (512 * 1024 * 1024);
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#elif defined(__arm__)
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@@ -584,8 +583,7 @@ static void code_gen_alloc(unsigned long tb_size)
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code_gen_buffer_size = (800 * 1024 * 1024);
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#elif defined(__sparc_v9__)
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// Map the buffer below 2G, so we can use direct calls and branches
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- flags |= MAP_FIXED;
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- addr = (void *) 0x60000000UL;
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+ addr = (void *) 0x40000000UL;
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if (code_gen_buffer_size > (512 * 1024 * 1024)) {
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code_gen_buffer_size = (512 * 1024 * 1024);
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}
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--
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1.7.12.1
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