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target-alpha: Fixes for alpha-linux syscalls.

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1. Add correct definitions of error numbers.
2. Implement SYS_osf_sigprocmask
3. Implement SYS_osf_get/setsysinfo for IEEE_FP_CONTROL.

This last requires exposing the FPCR value to do_syscall.
Since this value is actually split up into the float_status,
expose routines from helper.c to access it.

Finally, also add a float_exception_mask field to float_status.
We don't actually use it to control delivery of exceptions to
the emulator yet, but simply hold the value that we placed there
when loading/storing the FPCR.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Richard Henderson 2009-12-09 15:56:29 -08:00 • committed by Aurelien Jarno
parent 990b3e1901
commit ba0e276db4
6 changed files with 468 additions and 49 deletions
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137
linux-user/syscall.c
View file

@ -6390,25 +6390,142 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
#if defined(TARGET_NR_getxuid) && defined(TARGET_ALPHA)
/* Alpha specific */
case TARGET_NR_getxuid:
{
uid_t euid;
euid=geteuid();
((CPUAlphaState *)cpu_env)->ir[IR_A4]=euid;
}
{
uid_t euid;
euid=geteuid();
((CPUAlphaState *)cpu_env)->ir[IR_A4]=euid;
}
ret = get_errno(getuid());
break;
#endif
#if defined(TARGET_NR_getxgid) && defined(TARGET_ALPHA)
/* Alpha specific */
case TARGET_NR_getxgid:
{
uid_t egid;
egid=getegid();
((CPUAlphaState *)cpu_env)->ir[IR_A4]=egid;
}
{
uid_t egid;
egid=getegid();
((CPUAlphaState *)cpu_env)->ir[IR_A4]=egid;
}
ret = get_errno(getgid());
break;
#endif
#if defined(TARGET_NR_osf_getsysinfo) && defined(TARGET_ALPHA)
/* Alpha specific */
case TARGET_NR_osf_getsysinfo:
ret = -TARGET_EOPNOTSUPP;
switch (arg1) {
case TARGET_GSI_IEEE_FP_CONTROL:
{
uint64_t swcr, fpcr = cpu_alpha_load_fpcr (cpu_env);
/* Copied from linux ieee_fpcr_to_swcr. */
swcr = (fpcr >> 35) & SWCR_STATUS_MASK;
swcr |= (fpcr >> 36) & SWCR_MAP_DMZ;
swcr |= (~fpcr >> 48) & (SWCR_TRAP_ENABLE_INV
| SWCR_TRAP_ENABLE_DZE
| SWCR_TRAP_ENABLE_OVF);
swcr |= (~fpcr >> 57) & (SWCR_TRAP_ENABLE_UNF
| SWCR_TRAP_ENABLE_INE);
swcr |= (fpcr >> 47) & SWCR_MAP_UMZ;
swcr |= (~fpcr >> 41) & SWCR_TRAP_ENABLE_DNO;
if (put_user_u64 (swcr, arg2))
goto efault;
ret = 0;
}
break;
/* case GSI_IEEE_STATE_AT_SIGNAL:
-- Not implemented in linux kernel.
case GSI_UACPROC:
-- Retrieves current unaligned access state; not much used.
case GSI_PROC_TYPE:
-- Retrieves implver information; surely not used.
case GSI_GET_HWRPB:
-- Grabs a copy of the HWRPB; surely not used.
*/
}
break;
#endif
#if defined(TARGET_NR_osf_setsysinfo) && defined(TARGET_ALPHA)
/* Alpha specific */
case TARGET_NR_osf_setsysinfo:
ret = -TARGET_EOPNOTSUPP;
switch (arg1) {
case TARGET_SSI_IEEE_FP_CONTROL:
case TARGET_SSI_IEEE_RAISE_EXCEPTION:
{
uint64_t swcr, fpcr, orig_fpcr;
if (get_user_u64 (swcr, arg2))
goto efault;
orig_fpcr = cpu_alpha_load_fpcr (cpu_env);
fpcr = orig_fpcr & FPCR_DYN_MASK;
/* Copied from linux ieee_swcr_to_fpcr. */
fpcr |= (swcr & SWCR_STATUS_MASK) << 35;
fpcr |= (swcr & SWCR_MAP_DMZ) << 36;
fpcr |= (~swcr & (SWCR_TRAP_ENABLE_INV
| SWCR_TRAP_ENABLE_DZE
| SWCR_TRAP_ENABLE_OVF)) << 48;
fpcr |= (~swcr & (SWCR_TRAP_ENABLE_UNF
| SWCR_TRAP_ENABLE_INE)) << 57;
fpcr |= (swcr & SWCR_MAP_UMZ ? FPCR_UNDZ | FPCR_UNFD : 0);
fpcr |= (~swcr & SWCR_TRAP_ENABLE_DNO) << 41;
cpu_alpha_store_fpcr (cpu_env, fpcr);
ret = 0;
if (arg1 == TARGET_SSI_IEEE_RAISE_EXCEPTION) {
/* Old exceptions are not signaled. */
fpcr &= ~(orig_fpcr & FPCR_STATUS_MASK);
/* If any exceptions set by this call, and are unmasked,
send a signal. */
/* ??? FIXME */
}
}
break;
/* case SSI_NVPAIRS:
-- Used with SSIN_UACPROC to enable unaligned accesses.
case SSI_IEEE_STATE_AT_SIGNAL:
case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
-- Not implemented in linux kernel
*/
}
break;
#endif
#ifdef TARGET_NR_osf_sigprocmask
/* Alpha specific. */
case TARGET_NR_osf_sigprocmask:
{
abi_ulong mask;
int how = arg1;
sigset_t set, oldset;
switch(arg1) {
case TARGET_SIG_BLOCK:
how = SIG_BLOCK;
break;
case TARGET_SIG_UNBLOCK:
how = SIG_UNBLOCK;
break;
case TARGET_SIG_SETMASK:
how = SIG_SETMASK;
break;
default:
ret = -TARGET_EINVAL;
goto fail;
}
mask = arg2;
target_to_host_old_sigset(&set, &mask);
sigprocmask(arg1, &set, &oldset);
host_to_target_old_sigset(&mask, &oldset);
ret = mask;
}
break;
#endif
#ifdef TARGET_NR_getgid32
case TARGET_NR_getgid32: