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tcg/arm: remove fixed map code buffer restriction

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On ARM, don't map the code buffer at a fixed location, and fix up the
call/goto tcg routines to let it do long jumps.

Mapping the code buffer at a fixed address could sometimes result in it being
mapped over the top of the heap with pretty random results.

Signed-off-by: Dr. David Alan Gilbert <david.gilbert@linaro.org>
Signed-off-by: Andrzej Zaborowski <andrew.zaborowski@intel.com>
This commit is contained in:
Dr. David Alan Gilbert 2011-12-12 16:37:31 +01:00 • committed by Andrzej Zaborowski
parent 23ce84b1bb
commit 222f23f508
2 changed files with 13 additions and 22 deletions
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4
exec.c
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@ -497,9 +497,7 @@ static void code_gen_alloc(unsigned long tb_size)
if (code_gen_buffer_size > (512 * 1024 * 1024))
code_gen_buffer_size = (512 * 1024 * 1024);
#elif defined(__arm__)
/* Map the buffer below 32M, so we can use direct calls and branches */
flags |= MAP_FIXED;
start = (void *) 0x01000000UL;
/* Keep the buffer no bigger than 16GB to branch between blocks */
if (code_gen_buffer_size > 16 * 1024 * 1024)
code_gen_buffer_size = 16 * 1024 * 1024;
#elif defined(__s390x__)