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authorPavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>2018-04-13 16:30:41 +0300
committerLaurent Vivier <laurent@vivier.eu>2018-04-15 11:37:58 +0200
commit000761dc0c97d70e7314db3e8f52783880325a22 (patch)
tree8899a58ee758c62079e2f2053b9a390a48c1b1e1
parent38e83a71d02e026d4a6d0ab1ef9855c4924c2c68 (diff)
downloadqemu-arm-000761dc0c97d70e7314db3e8f52783880325a22.tar.gz
m68k: fix exception stack frame for 68000
68000 CPUs do not save format in the exception stack frame. This patch adds feature checking to prevent format saving for 68000. m68k_ret() already includes this modification, this patch fixes the exception processing function too. Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20180413133041.29509.59064.stgit@pasha-VirtualBox> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
-rw-r--r--target/m68k/op_helper.c33
1 files changed, 18 insertions, 15 deletions
diff --git a/target/m68k/op_helper.c b/target/m68k/op_helper.c
index 3a7f7f2219..8d09ed91c4 100644
--- a/target/m68k/op_helper.c
+++ b/target/m68k/op_helper.c
@@ -287,22 +287,25 @@ static inline void do_stack_frame(CPUM68KState *env, uint32_t *sp,
uint16_t format, uint16_t sr,
uint32_t addr, uint32_t retaddr)
{
- CPUState *cs = CPU(m68k_env_get_cpu(env));
- switch (format) {
- case 4:
- *sp -= 4;
- cpu_stl_kernel(env, *sp, env->pc);
- *sp -= 4;
- cpu_stl_kernel(env, *sp, addr);
- break;
- case 3:
- case 2:
- *sp -= 4;
- cpu_stl_kernel(env, *sp, addr);
- break;
+ if (m68k_feature(env, M68K_FEATURE_QUAD_MULDIV)) {
+ /* all except 68000 */
+ CPUState *cs = CPU(m68k_env_get_cpu(env));
+ switch (format) {
+ case 4:
+ *sp -= 4;
+ cpu_stl_kernel(env, *sp, env->pc);
+ *sp -= 4;
+ cpu_stl_kernel(env, *sp, addr);
+ break;
+ case 3:
+ case 2:
+ *sp -= 4;
+ cpu_stl_kernel(env, *sp, addr);
+ break;
+ }
+ *sp -= 2;
+ cpu_stw_kernel(env, *sp, (format << 12) + (cs->exception_index << 2));
}
- *sp -= 2;
- cpu_stw_kernel(env, *sp, (format << 12) + (cs->exception_index << 2));
*sp -= 4;
cpu_stl_kernel(env, *sp, retaddr);
*sp -= 2;