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author | Emilio G. Cota <cota@braap.org> | 2017-07-15 02:28:47 -0400 |
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committer | Richard Henderson <richard.henderson@linaro.org> | 2017-10-24 13:53:42 -0700 |
commit | 5fa64b3130af9a45e7e2a904bde1f8cfb72be5c9 (patch) | |
tree | a72d9970a7ad3d12caa1afc5b60ba449369e643c /util | |
parent | 34184b071817b4f9edbfd1aa2225c196f05a0947 (diff) | |
download | qemu-5fa64b3130af9a45e7e2a904bde1f8cfb72be5c9.zip qemu-5fa64b3130af9a45e7e2a904bde1f8cfb72be5c9.tar.gz qemu-5fa64b3130af9a45e7e2a904bde1f8cfb72be5c9.tar.bz2 |
osdep: introduce qemu_mprotect_rwx/none
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'util')
-rw-r--r-- | util/osdep.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/util/osdep.c b/util/osdep.c index a479fed..1231f9f 100644 --- a/util/osdep.c +++ b/util/osdep.c @@ -73,6 +73,47 @@ int qemu_madvise(void *addr, size_t len, int advice) #endif } +static int qemu_mprotect__osdep(void *addr, size_t size, int prot) +{ + g_assert(!((uintptr_t)addr & ~qemu_real_host_page_mask)); + g_assert(!(size & ~qemu_real_host_page_mask)); + +#ifdef _WIN32 + DWORD old_protect; + + if (!VirtualProtect(addr, size, prot, &old_protect)) { + error_report("%s: VirtualProtect failed with error code %ld", + __func__, GetLastError()); + return -1; + } + return 0; +#else + if (mprotect(addr, size, prot)) { + error_report("%s: mprotect failed: %s", __func__, strerror(errno)); + return -1; + } + return 0; +#endif +} + +int qemu_mprotect_rwx(void *addr, size_t size) +{ +#ifdef _WIN32 + return qemu_mprotect__osdep(addr, size, PAGE_EXECUTE_READWRITE); +#else + return qemu_mprotect__osdep(addr, size, PROT_READ | PROT_WRITE | PROT_EXEC); +#endif +} + +int qemu_mprotect_none(void *addr, size_t size) +{ +#ifdef _WIN32 + return qemu_mprotect__osdep(addr, size, PAGE_NOACCESS); +#else + return qemu_mprotect__osdep(addr, size, PROT_NONE); +#endif +} + #ifndef _WIN32 static int fcntl_op_setlk = -1; |