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Map code buffers below 2G on Sparc64

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4951 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
blueswir1 2008-07-26 15:05:57 +00:00
parent c070355d39
commit 141ac468ab
2 changed files with 14 additions and 5 deletions
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18
exec.c
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@ -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);
#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(NULL, code_gen_buffer_size,
PROT_WRITE | PROT_READ | PROT_EXEC,
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");

1
sparc64.ld
View File

@ -69,6 +69,7 @@ SECTIONS
. = ALIGN(0x100000) + (. & (0x100000 - 1));
.data :
{
*(.gen_code)
*(.data)
*(.gnu.linkonce.d*)
CONSTRUCTORS