/* * 32-bit test to check vDSO mremap. * * Copyright (c) 2016 Dmitry Safonov * Suggested-by: Andrew Lutomirski * * This program is free software; you can redistribute it and/or modify * it under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. */ /* * Can be built statically: * gcc -Os -Wall -static -m32 test_mremap_vdso.c */ #define _GNU_SOURCE #include #include #include #include #include #include #include #include #define PAGE_SIZE 4096 static int try_to_remap(void *vdso_addr, unsigned long size) { void *dest_addr, *new_addr; /* Searching for memory location where to remap */ dest_addr = mmap(0, size, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); if (dest_addr == MAP_FAILED) { printf("[WARN]\tmmap failed (%d): %m\n", errno); return 0; } printf("[NOTE]\tMoving vDSO: [%p, %#lx] -> [%p, %#lx]\n", vdso_addr, (unsigned long)vdso_addr + size, dest_addr, (unsigned long)dest_addr + size); fflush(stdout); new_addr = mremap(vdso_addr, size, size, MREMAP_FIXED|MREMAP_MAYMOVE, dest_addr); if ((unsigned long)new_addr == (unsigned long)-1) { munmap(dest_addr, size); if (errno == EINVAL) { printf("[NOTE]\tvDSO partial move failed, will try with bigger size\n"); return -1; /* Retry with larger */ } printf("[FAIL]\tmremap failed (%d): %m\n", errno); return 1; } return 0; } int main(int argc, char **argv, char **envp) { pid_t child; child = fork(); if (child == -1) { printf("[WARN]\tfailed to fork (%d): %m\n", errno); return 1; } if (child == 0) { unsigned long vdso_size = PAGE_SIZE; unsigned long auxval; int ret = -1; auxval = getauxval(AT_SYSINFO_EHDR); printf("\tAT_SYSINFO_EHDR is %#lx\n", auxval); if (!auxval || auxval == -ENOENT) { printf("[WARN]\tgetauxval failed\n"); return 0; } /* Simpler than parsing ELF header */ while (ret < 0) { ret = try_to_remap((void *)auxval, vdso_size); vdso_size += PAGE_SIZE; } /* Glibc is likely to explode now - exit with raw syscall */ asm volatile ("int $0x80" : : "a" (__NR_exit), "b" (!!ret)); } else { int status; if (waitpid(child, &status, 0) != child || !WIFEXITED(status)) { printf("[FAIL]\tmremap() of the vDSO does not work on this kernel!\n"); return 1; } else if (WEXITSTATUS(status) != 0) { printf("[FAIL]\tChild failed with %d\n", WEXITSTATUS(status)); return 1; } printf("[OK]\n"); } return 0; } rm>
path: root/include/dt-bindings/interrupt-controller/irq-st.h
diff options
context:
space:
mode:
authorFeng <fgao@ikuai8.com>2017-01-20 21:40:43 +0800
committerPablo Neira Ayuso <pablo@netfilter.org>2017-02-02 14:30:19 +0100
commit10435c1192d06bdb0bac7666452d8219d7e7c477 (patch)
tree93b76419142fe17b1d162d062c663297a3e8a965 /include/dt-bindings/interrupt-controller/irq-st.h
parent1a28ad74ebd8f9d3c7eae0d781f72a6d30545e17 (diff)
netfilter: nf_tables: Eliminate duplicated code in nf_tables_table_enable()
If something fails in nf_tables_table_enable(), it unregisters the chains. But the rollback code is the same as nf_tables_table_disable() almostly, except there is one counter check. Now create one wrapper function to eliminate the duplicated codes. Signed-off-by: Feng <fgao@ikuai8.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include/dt-bindings/interrupt-controller/irq-st.h')