From: Juergen Lock <n...@jelal.kn-bremen.de>
do_freebsd_sysctl_oid filters out some of the binary and special sysctls
where host != target. This commit focuses on the simple sysctls that can
be done in a few lines.
Signed-off-by: Juergen Lock <n...@jelal.kn-bremen.de>
Co-Authored-by: Stacey Son <s...@freebsd.org>
Signed-off-by: Stacey Son <s...@freebsd.org>
Signed-off-by: Warner Losh <i...@bsdimp.com>
---
bsd-user/freebsd/os-sys.c | 212 ++++++++++++++++++++++++++++++++++++++
bsd-user/qemu.h | 5 +
2 files changed, 217 insertions(+)
diff --git a/bsd-user/freebsd/os-sys.c b/bsd-user/freebsd/os-sys.c
index ac5ab9b17bc..a8fb29f36b7 100644
--- a/bsd-user/freebsd/os-sys.c
+++ b/bsd-user/freebsd/os-sys.c
@@ -133,6 +133,218 @@ static inline void sysctl_oidfmt(uint32_t *holdp)
holdp[0] = tswap32(holdp[0]);
}
+#define bsd_get_ncpu() 1 /* Placeholder */
+
+static abi_long do_freebsd_sysctl_oid(CPUArchState *env, int32_t *snamep,
+ int32_t namelen, void *holdp, size_t *holdlenp, void *hnewp,
+ size_t newlen)
+{
+ uint32_t kind = 0;
+#if TARGET_ABI_BITS != HOST_LONG_BITS
+ const abi_ulong maxmem = -0x100c000;
+#endif
+ abi_long ret;
+ size_t holdlen, oldlen;
+
+ holdlen = oldlen = *holdlenp;
+ oidfmt(snamep, namelen, NULL, &kind);
+
+ /* Handle some arch/emulator dependent sysctl()'s here. */
+ switch (snamep[0]) {
+#if defined(TARGET_PPC) || defined(TARGET_PPC64)
+ case CTL_MACHDEP:
+ switch (snamep[1]) {
+ case 1: /* CPU_CACHELINE */
+ holdlen = sizeof(uint32_t);
+ (*(uint32_t *)holdp) = tswap32(env->dcache_line_size);
+ ret = 0;
+ goto out;
+ }
+ break;
+#endif
+ case CTL_KERN:
+ switch (snamep[1]) {
+ case KERN_USRSTACK:
+ if (oldlen) {
+ (*(abi_ulong *)holdp) = tswapal(TARGET_USRSTACK);
+ }
+ holdlen = sizeof(abi_ulong);
+ ret = 0;
+ goto out;
+
+ case KERN_PS_STRINGS:
+ if (oldlen) {
+ (*(abi_ulong *)holdp) = tswapal(TARGET_PS_STRINGS);
+ }
+ holdlen = sizeof(abi_ulong);
+ ret = 0;
+ goto out;
+
+ default:
+ break;
+ }
+ break;
+
+ case CTL_HW:
+ switch (snamep[1]) {
+ case HW_MACHINE:
+ holdlen = sizeof(TARGET_HW_MACHINE);
+ if (holdp) {
+ strlcpy(holdp, TARGET_HW_MACHINE, oldlen);
+ }
+ ret = 0;
+ goto out;
+
+ case HW_MACHINE_ARCH:
+ {
+ holdlen = sizeof(TARGET_HW_MACHINE_ARCH);
+ if (holdp) {
+ strlcpy(holdp, TARGET_HW_MACHINE_ARCH, oldlen);
+ }
+ ret = 0;
+ goto out;
+ }
+ case HW_NCPU:
+ if (oldlen) {
+ (*(int32_t *)holdp) = tswap32(bsd_get_ncpu());
+ }
+ holdlen = sizeof(int32_t);
+ ret = 0;
+ goto out;
+#if defined(TARGET_ARM)
+ case HW_FLOATINGPT:
+ if (oldlen) {
+#ifdef ARM_FEATURE_VFP /* XXX FIXME XXX */
+ if (env->features & ((1ULL << ARM_FEATURE_VFP)|
+ (1ULL << ARM_FEATURE_VFP3)|
+ (1ULL << ARM_FEATURE_VFP4)))
+ *(int32_t *)holdp = 1;
+ else
+ *(int32_t *)holdp = 0;
+#else
+ *(int32_t *)holdp = 1;
+#endif
+ }
+ holdlen = sizeof(int32_t);
+ ret = 0;
+ goto out;
+#endif
+
+
+#if TARGET_ABI_BITS != HOST_LONG_BITS
+ case HW_PHYSMEM:
+ case HW_USERMEM:
+ case HW_REALMEM:
+ holdlen = sizeof(abi_ulong);
+ ret = 0;
+
+ if (oldlen) {
+ int mib[2] = {snamep[0], snamep[1]};
+ unsigned long lvalue;
+ size_t len = sizeof(lvalue);
+
+ if (sysctl(mib, 2, &lvalue, &len, NULL, 0) == -1) {
+ ret = -1;
+ } else {
+ if (((unsigned long)maxmem) < lvalue) {
+ lvalue = maxmem;
+ }
+ (*(abi_ulong *)holdp) = tswapal((abi_ulong)lvalue);
+ }
+ }
+ goto out;
+#endif
+
+ default:
+ {
+ static int oid_hw_availpages;
+ static int oid_hw_pagesizes;
+
+ if (!oid_hw_availpages) {
+ int real_oid[CTL_MAXNAME + 2];
+ size_t len = sizeof(real_oid) / sizeof(int);
+
+ if (sysctlnametomib("hw.availpages", real_oid, &len) >= 0) {
+ oid_hw_availpages = real_oid[1];
+ }
+ }
+ if (!oid_hw_pagesizes) {
+ int real_oid[CTL_MAXNAME + 2];
+ size_t len = sizeof(real_oid) / sizeof(int);
+
+ if (sysctlnametomib("hw.pagesizes", real_oid, &len) >= 0) {
+ oid_hw_pagesizes = real_oid[1];
+ }
+ }
+
+ if (oid_hw_availpages && snamep[1] == oid_hw_availpages) {
+ long lvalue;
+ size_t len = sizeof(lvalue);
+
+ if (sysctlbyname("hw.availpages", &lvalue, &len, NULL, 0) ==
-1) {
+ ret = -1;
+ } else {
+ if (oldlen) {
+#if TARGET_ABI_BITS != HOST_LONG_BITS
+ abi_ulong maxpages = maxmem / (abi_ulong)getpagesize();
+ if (((unsigned long)maxpages) < lvalue) {
+ lvalue = maxpages;
+ }
+#endif
+ (*(abi_ulong *)holdp) = tswapal((abi_ulong)lvalue);
+ }
+ holdlen = sizeof(abi_ulong);
+ ret = 0;
+ }
+ goto out;
+ }
+
+ if (oid_hw_pagesizes && snamep[1] == oid_hw_pagesizes) {
+ if (oldlen) {
+ (*(abi_ulong *)holdp) = tswapal((abi_ulong)getpagesize());
+ ((abi_ulong *)holdp)[1] = 0;
+ }
+ holdlen = sizeof(abi_ulong) * 2;
+ ret = 0;
+ goto out;
+ }
+ break;
+ }
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ ret = get_errno(sysctl(snamep, namelen, holdp, &holdlen, hnewp, newlen));
+ if (!ret && (holdp != 0)) {
+
+ if (0 == snamep[0] &&
+ (2 == snamep[1] || 3 == snamep[1] || 4 == snamep[1])) {
+ switch (snamep[1]) {
+ case 2:
+ case 3:
+ /* Handle the undocumented name2oid special case. */
+ sysctl_name2oid(holdp, holdlen);
+ break;
+
+ case 4:
+ default:
+ /* Handle oidfmt */
+ sysctl_oidfmt(holdp);
+ break;
+ }
+ } else {
+ sysctl_oldcvt(holdp, &holdlen, kind);
+ }
+ }
+
+out:
+ *holdlenp = holdlen;
+ return ret;
+}
+
/* sysarch() is architecture dependent. */
abi_long do_freebsd_sysarch(void *cpu_env, abi_long arg1, abi_long arg2)
{
diff --git a/bsd-user/qemu.h b/bsd-user/qemu.h
index 0ceecfb6dfa..e24a8cfcfb1 100644
--- a/bsd-user/qemu.h
+++ b/bsd-user/qemu.h
@@ -252,6 +252,11 @@ bool is_error(abi_long ret);
int host_to_target_errno(int err);
/* os-sys.c */
+abi_long do_freebsd_sysctl(CPUArchState *env, abi_ulong namep, int32_t namelen,
+ abi_ulong oldp, abi_ulong oldlenp, abi_ulong newp, abi_ulong newlen);
+abi_long do_freebsd_sysctlbyname(CPUArchState *env, abi_ulong namep,
+ int32_t namelen, abi_ulong oldp, abi_ulong oldlenp, abi_ulong newp,
+ abi_ulong newlen);
abi_long do_freebsd_sysarch(void *cpu_env, abi_long arg1, abi_long arg2);
/* user access */
--
2.39.1
