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authorblueswir1 <blueswir1@c046a42c-6fe2-441c-8c8c-71466251a162>2008-07-26 15:05:57 +0000
committerblueswir1 <blueswir1@c046a42c-6fe2-441c-8c8c-71466251a162>2008-07-26 15:05:57 +0000
commit141ac468abbd1f1d17d8969e8ee1b62cce65091e (patch)
treed1053442cb10b8af8351dbf76045947e19d68650 /exec.c
parentc070355d398160b6c1ed7ea22753903e96a298d6 (diff)
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Map code buffers below 2G on Sparc64
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4951 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'exec.c')
-rw-r--r--exec.c20
1 files changed, 14 insertions, 6 deletions
diff --git a/exec.c b/exec.c
index 47f35e5..3ab4ad0 100644
--- a/exec.c
+++ b/exec.c
@@ -89,9 +89,9 @@ int nb_tbs;
/* any access to the tbs or the page table must use this lock */
spinlock_t tb_lock = SPIN_LOCK_UNLOCKED;
-#if defined(__arm__)
-/* The prologue must be reachable with a direct jump. ARM has a
- limited branch range (possibly also PPC and SPARC?) so place it in a
+#if defined(__arm__) || defined(__sparc_v9__)
+/* The prologue must be reachable with a direct jump. ARM and Sparc64
+ have limited branch ranges (possibly also PPC) so place it in a
section close to code segment. */
#define code_gen_section \
__attribute__((__section__(".gen_code"))) \
@@ -410,15 +410,23 @@ void code_gen_alloc(unsigned long tb_size)
#if defined(__linux__)
{
int flags;
+ void *start = NULL;
+
flags = MAP_PRIVATE | MAP_ANONYMOUS;
#if defined(__x86_64__)
flags |= MAP_32BIT;
/* Cannot map more than that */
if (code_gen_buffer_size > (800 * 1024 * 1024))
code_gen_buffer_size = (800 * 1024 * 1024);
-#endif
- code_gen_buffer = mmap(NULL, code_gen_buffer_size,
- PROT_WRITE | PROT_READ | PROT_EXEC,
+#elif defined(__sparc_v9__)
+ // Map the buffer below 2G, so we can use direct calls and branches
+ flags |= MAP_FIXED;
+ start = (void *) 0x60000000UL;
+ if (code_gen_buffer_size > (512 * 1024 * 1024))
+ code_gen_buffer_size = (512 * 1024 * 1024);
+#endif
+ code_gen_buffer = mmap(start, code_gen_buffer_size,
+ PROT_WRITE | PROT_READ | PROT_EXEC,
flags, -1, 0);
if (code_gen_buffer == MAP_FAILED) {
fprintf(stderr, "Could not allocate dynamic translator buffer\n");