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authormalc <malc@c046a42c-6fe2-441c-8c8c-71466251a162>2008-07-29 20:08:17 +0000
committermalc <malc@c046a42c-6fe2-441c-8c8c-71466251a162>2008-07-29 20:08:17 +0000
commit52781543adc9590fee28d77b15634795a096fc86 (patch)
tree0c8d0ede25e604a3758912ef1e068a5087c7dea7 /tcg
parent23cde8bb1265bc9dba63dac64055bd9857d7285f (diff)
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On ppc32 make tb_set_jmp_target1 behave like it does on a ppc64
Avoids nasty warnings about flush_icache_range from gcc4 and inability to compile [cpu-]exec.c with gcc3 and -O, also the function is much too large to be candidate for inlining anyway. git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4974 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'tcg')
-rw-r--r--tcg/ppc/tcg-target.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/tcg/ppc/tcg-target.c b/tcg/ppc/tcg-target.c
index 7f95dd1..218e4bc 100644
--- a/tcg/ppc/tcg-target.c
+++ b/tcg/ppc/tcg-target.c
@@ -1015,6 +1015,37 @@ static void tcg_out_brcond2 (TCGContext *s, const TCGArg *args,
tcg_out_bc (s, (BC | BI (7, CR_EQ) | BO_COND_TRUE), label_index);
}
+void ppc_tb_set_jmp_target (unsigned long jmp_addr, unsigned long addr)
+{
+ uint32_t *ptr;
+ long disp = addr - jmp_addr;
+ unsigned long patch_size;
+
+ ptr = (uint32_t *)jmp_addr;
+
+ if ((disp << 6) >> 6 != disp) {
+ ptr[0] = 0x3c000000 | (addr >> 16); /* lis 0,addr@ha */
+ ptr[1] = 0x60000000 | (addr & 0xffff); /* la 0,addr@l(0) */
+ ptr[2] = 0x7c0903a6; /* mtctr 0 */
+ ptr[3] = 0x4e800420; /* brctr */
+ patch_size = 16;
+ } else {
+ /* patch the branch destination */
+ if (disp != 16) {
+ *ptr = 0x48000000 | (disp & 0x03fffffc); /* b disp */
+ patch_size = 4;
+ } else {
+ ptr[0] = 0x60000000; /* nop */
+ ptr[1] = 0x60000000;
+ ptr[2] = 0x60000000;
+ ptr[3] = 0x60000000;
+ patch_size = 16;
+ }
+ }
+ /* flush icache */
+ flush_icache_range(jmp_addr, jmp_addr + patch_size);
+}
+
static void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
const int *const_args)
{