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