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Move clone() register setup to target specific code. Handle fork-like clone.

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4623 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
pbrook 2008-05-30 17:22:15 +00:00
parent a4a99d71b2
commit 6e68e076e7
10 changed files with 92 additions and 58 deletions
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63
linux-user/syscall.c
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@ -2744,64 +2744,8 @@ int do_fork(CPUState *env, unsigned int flags, abi_ulong newsp)
first_task_state = ts;
/* we create a new CPU instance. */
new_env = cpu_copy(env);
#if defined(TARGET_I386)
if (!newsp)
newsp = env->regs[R_ESP];
new_env->regs[R_ESP] = newsp;
new_env->regs[R_EAX] = 0;
#elif defined(TARGET_ARM)
if (!newsp)
newsp = env->regs[13];
new_env->regs[13] = newsp;
new_env->regs[0] = 0;
#elif defined(TARGET_SPARC)
if (!newsp)
newsp = env->regwptr[22];
new_env->regwptr[22] = newsp;
new_env->regwptr[0] = 0;
/* XXXXX */
printf ("HELPME: %s:%d\n", __FILE__, __LINE__);
#elif defined(TARGET_M68K)
if (!newsp)
newsp = env->aregs[7];
new_env->aregs[7] = newsp;
new_env->dregs[0] = 0;
/* ??? is this sufficient? */
#elif defined(TARGET_MIPS)
if (!newsp)
newsp = env->gpr[env->current_tc][29];
new_env->gpr[env->current_tc][29] = newsp;
#elif defined(TARGET_PPC)
if (!newsp)
newsp = env->gpr[1];
new_env->gpr[1] = newsp;
{
int i;
for (i = 7; i < 32; i++)
new_env->gpr[i] = 0;
}
#elif defined(TARGET_SH4)
if (!newsp)
newsp = env->gregs[15];
new_env->gregs[15] = newsp;
/* XXXXX */
#elif defined(TARGET_ALPHA)
if (!newsp)
newsp = env->ir[30];
new_env->ir[30] = newsp;
/* ? */
{
int i;
for (i = 7; i < 30; i++)
new_env->ir[i] = 0;
}
#elif defined(TARGET_CRIS)
if (!newsp)
newsp = env->regs[14];
new_env->regs[14] = newsp;
#else
#error unsupported target CPU
#endif
/* Init regs that differ from the parent. */
cpu_clone_regs(new_env, newsp);
new_env->opaque = ts;
#ifdef __ia64__
ret = __clone2(clone_func, new_stack + NEW_STACK_SIZE, flags, new_env);
@ -2813,6 +2757,9 @@ int do_fork(CPUState *env, unsigned int flags, abi_ulong newsp)
if ((flags & ~CSIGNAL) != 0)
return -EINVAL;
ret = fork();
if (ret == 0) {
cpu_clone_regs(env, newsp);
}
}
return ret;
}