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SPARC fixes : syscall fixes - added user register window exception support 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@494 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2004-01-04 15:50:01 +00:00
parent 6da41eafc4
commit 060366c5ad
1 changed files with 129 additions and 21 deletions
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126
linux-user/main.c
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@ -299,23 +299,123 @@ void cpu_loop(CPUARMState *env)
#ifdef TARGET_SPARC
//#define DEBUG_WIN
/* WARNING: dealing with register windows _is_ complicated */
static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
{
index = (index + cwp * 16) & (16 * NWINDOWS - 1);
/* wrap handling : if cwp is on the last window, then we use the
registers 'after' the end */
if (index < 8 && env->cwp == (NWINDOWS - 1))
index += (16 * NWINDOWS);
return index;
}
static inline void save_window_offset(CPUSPARCState *env, int offset)
{
unsigned int new_wim, i, cwp1;
uint32_t *sp_ptr;
new_wim = ((env->wim >> 1) | (env->wim << (NWINDOWS - 1))) &
((1LL << NWINDOWS) - 1);
/* save the window */
cwp1 = (env->cwp + offset) & (NWINDOWS - 1);
sp_ptr = (uint32_t *)(env->regbase[get_reg_index(env, cwp1, 6)]);
#if defined(DEBUG_WIN)
printf("win_overflow: sp_ptr=0x%x save_cwp=%d\n",
(int)sp_ptr, cwp1);
#endif
for(i = 0; i < 16; i++)
stl_raw(sp_ptr + i, env->regbase[get_reg_index(env, cwp1, 8 + i)]);
env->wim = new_wim;
}
static void save_window(CPUSPARCState *env)
{
save_window_offset(env, 2);
}
static void restore_window(CPUSPARCState *env)
{
unsigned int new_wim, i, cwp1;
uint32_t *sp_ptr;
new_wim = ((env->wim << 1) | (env->wim >> (NWINDOWS - 1))) &
((1LL << NWINDOWS) - 1);
/* restore the invalid window */
cwp1 = (env->cwp + 1) & (NWINDOWS - 1);
sp_ptr = (uint32_t *)(env->regbase[get_reg_index(env, cwp1, 6)]);
#if defined(DEBUG_WIN)
printf("win_underflow: sp_ptr=0x%x load_cwp=%d\n",
(int)sp_ptr, cwp1);
#endif
for(i = 0; i < 16; i++)
env->regbase[get_reg_index(env, cwp1, 8 + i)] = ldl_raw(sp_ptr + i);
env->wim = new_wim;
}
static void flush_windows(CPUSPARCState *env)
{
int offset, cwp1;
#if defined(DEBUG_WIN)
printf("flush_windows:\n");
#endif
offset = 2;
for(;;) {
/* if restore would invoke restore_window(), then we can stop */
cwp1 = (env->cwp + 1) & (NWINDOWS - 1);
if (env->wim & (1 << cwp1))
break;
#if defined(DEBUG_WIN)
printf("offset=%d: ", offset);
#endif
save_window_offset(env, offset);
offset++;
}
}
void cpu_loop (CPUSPARCState *env)
{
int trapnr;
int trapnr, ret;
while (1) {
trapnr = cpu_sparc_exec (env);
switch (trapnr) {
case 0x8: case 0x10:
env->regwptr[0] = do_syscall (env, env->gregs[1],
env->regwptr[0], env->regwptr[1], env->regwptr[2],
env->regwptr[3], env->regwptr[4], env->regwptr[13]);
if (env->regwptr[0] >= 0xffffffe0)
case 0x88:
case 0x90:
ret = do_syscall (env, env->gregs[1],
env->regwptr[0], env->regwptr[1],
env->regwptr[2], env->regwptr[3],
env->regwptr[4], env->regwptr[5]);
if ((unsigned int)ret >= (unsigned int)(-515)) {
env->psr |= PSR_CARRY;
ret = -ret;
} else {
env->psr &= ~PSR_CARRY;
}
env->regwptr[0] = ret;
/* next instruction */
env->pc = env->npc;
env->npc = env->npc + 4;
break;
case 0x83: /* flush windows */
// flush_windows(env);
/* next instruction */
env->pc = env->npc;
env->npc = env->npc + 4;
break;
case TT_WIN_OVF: /* window overflow */
save_window(env);
break;
case TT_WIN_UNF: /* window underflow */
restore_window(env);
break;
default:
printf ("Invalid trap: %d\n", trapnr);
printf ("Unhandled trap: 0x%x\n", trapnr);
cpu_sparc_dump_state(env, stderr, 0);
exit (1);
}
process_pending_signals (env);
@ -636,8 +736,16 @@ int main(int argc, char **argv)
env->cpsr = regs->uregs[16];
}
#elif defined(TARGET_SPARC)
env->pc = regs->u_regs[0];
env->regwptr[6] = regs->u_regs[1]-0x40;
{
int i;
env->pc = regs->pc;
env->npc = regs->npc;
env->y = regs->y;
for(i = 0; i < 8; i++)
env->gregs[i] = regs->u_regs[i];
for(i = 0; i < 8; i++)
env->regwptr[i] = regs->u_regs[i + 8];
}
#elif defined(TARGET_PPC)
{
int i;