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