^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * Copyright (c) 2019 Alexey Dobriyan <adobriyan@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Permission to use, copy, modify, and distribute this software for any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * purpose with or without fee is hereby granted, provided that the above
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * copyright notice and this permission notice appear in all copies.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * Fork and exec tiny 1 page executable which precisely controls its VM.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * Test /proc/$PID/maps
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * Test /proc/$PID/smaps
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * Test /proc/$PID/smaps_rollup
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * Test /proc/$PID/statm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * FIXME require CONFIG_TMPFS which can be disabled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * FIXME test other values from "smaps"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * FIXME support other archs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #undef NDEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <assert.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <stdbool.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <stdint.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <sys/mount.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <sys/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <sys/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include <sys/wait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include <fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include <sys/syscall.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #include <sys/uio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #include <linux/kdev_t.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #include <sys/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #include <sys/resource.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static inline long sys_execveat(int dirfd, const char *pathname, char **argv, char **envp, int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) return syscall(SYS_execveat, dirfd, pathname, argv, envp, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static void make_private_tmp(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (unshare(CLONE_NEWNS) == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (errno == ENOSYS || errno == EPERM) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) exit(4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) exit(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (mount(NULL, "/", NULL, MS_PRIVATE|MS_REC, NULL) == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) exit(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (mount(NULL, "/tmp", "tmpfs", 0, NULL) == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) exit(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static pid_t pid = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static void ate(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (pid > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) kill(pid, SIGTERM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) struct elf64_hdr {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) uint8_t e_ident[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) uint16_t e_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) uint16_t e_machine;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) uint32_t e_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) uint64_t e_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) uint64_t e_phoff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) uint64_t e_shoff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) uint32_t e_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) uint16_t e_ehsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) uint16_t e_phentsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) uint16_t e_phnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) uint16_t e_shentsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) uint16_t e_shnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) uint16_t e_shstrndx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) struct elf64_phdr {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) uint32_t p_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) uint32_t p_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) uint64_t p_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) uint64_t p_vaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) uint64_t p_paddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) uint64_t p_filesz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) uint64_t p_memsz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) uint64_t p_align;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) #ifdef __x86_64__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #define PAGE_SIZE 4096
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) #define VADDR (1UL << 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #define MAPS_OFFSET 73
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) #define syscall 0x0f, 0x05
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) #define mov_rdi(x) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 0x48, 0xbf, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) (x)&0xff, ((x)>>8)&0xff, ((x)>>16)&0xff, ((x)>>24)&0xff, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) ((x)>>32)&0xff, ((x)>>40)&0xff, ((x)>>48)&0xff, ((x)>>56)&0xff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #define mov_rsi(x) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 0x48, 0xbe, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) (x)&0xff, ((x)>>8)&0xff, ((x)>>16)&0xff, ((x)>>24)&0xff, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) ((x)>>32)&0xff, ((x)>>40)&0xff, ((x)>>48)&0xff, ((x)>>56)&0xff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) #define mov_eax(x) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 0xb8, (x)&0xff, ((x)>>8)&0xff, ((x)>>16)&0xff, ((x)>>24)&0xff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) static const uint8_t payload[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) /* Casually unmap stack, vDSO and everything else. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) /* munmap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) mov_rdi(VADDR + 4096),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) mov_rsi((1ULL << 47) - 4096 - VADDR - 4096),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) mov_eax(11),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) syscall,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) /* Ping parent. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) /* write(0, &c, 1); */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 0x31, 0xff, /* xor edi, edi */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 0x48, 0x8d, 0x35, 0x00, 0x00, 0x00, 0x00, /* lea rsi, [rip] */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 0xba, 0x01, 0x00, 0x00, 0x00, /* mov edx, 1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) mov_eax(1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) syscall,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) /* 1: pause(); */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) mov_eax(34),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) syscall,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 0xeb, 0xf7, /* jmp 1b */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) static int make_exe(const uint8_t *payload, size_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) struct elf64_hdr h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) struct elf64_phdr ph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) struct iovec iov[3] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) {&h, sizeof(struct elf64_hdr)},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) {&ph, sizeof(struct elf64_phdr)},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) {(void *)payload, len},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) int fd, fd1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) char buf[64];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) memset(&h, 0, sizeof(h));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) h.e_ident[0] = 0x7f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) h.e_ident[1] = 'E';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) h.e_ident[2] = 'L';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) h.e_ident[3] = 'F';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) h.e_ident[4] = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) h.e_ident[5] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) h.e_ident[6] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) h.e_ident[7] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) h.e_type = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) h.e_machine = 0x3e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) h.e_version = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) h.e_entry = VADDR + sizeof(struct elf64_hdr) + sizeof(struct elf64_phdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) h.e_phoff = sizeof(struct elf64_hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) h.e_shoff = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) h.e_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) h.e_ehsize = sizeof(struct elf64_hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) h.e_phentsize = sizeof(struct elf64_phdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) h.e_phnum = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) h.e_shentsize = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) h.e_shnum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) h.e_shstrndx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) memset(&ph, 0, sizeof(ph));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) ph.p_type = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) ph.p_flags = (1<<2)|1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) ph.p_offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) ph.p_vaddr = VADDR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) ph.p_paddr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) ph.p_filesz = sizeof(struct elf64_hdr) + sizeof(struct elf64_phdr) + len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) ph.p_memsz = sizeof(struct elf64_hdr) + sizeof(struct elf64_phdr) + len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) ph.p_align = 4096;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) fd = openat(AT_FDCWD, "/tmp", O_WRONLY|O_EXCL|O_TMPFILE, 0700);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) if (fd == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) exit(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) if (writev(fd, iov, 3) != sizeof(struct elf64_hdr) + sizeof(struct elf64_phdr) + len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) exit(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) /* Avoid ETXTBSY on exec. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) snprintf(buf, sizeof(buf), "/proc/self/fd/%u", fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) fd1 = open(buf, O_RDONLY|O_CLOEXEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) close(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) return fd1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) static bool g_vsyscall = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) static const char str_vsyscall[] =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) "ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]\n";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) #ifdef __x86_64__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) static void sigaction_SIGSEGV(int _, siginfo_t *__, void *___)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) _exit(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) * vsyscall page can't be unmapped, probe it with memory load.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) static void vsyscall(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) pid_t pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) int wstatus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) pid = fork();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (pid < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) fprintf(stderr, "fork, errno %d\n", errno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) exit(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) if (pid == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) struct rlimit rlim = {0, 0};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) (void)setrlimit(RLIMIT_CORE, &rlim);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) /* Hide "segfault at ffffffffff600000" messages. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) struct sigaction act;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) memset(&act, 0, sizeof(struct sigaction));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) act.sa_flags = SA_SIGINFO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) act.sa_sigaction = sigaction_SIGSEGV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) (void)sigaction(SIGSEGV, &act, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) *(volatile int *)0xffffffffff600000UL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) exit(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) waitpid(pid, &wstatus, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) if (WIFEXITED(wstatus) && WEXITSTATUS(wstatus) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) g_vsyscall = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) int main(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) int pipefd[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) int exec_fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) vsyscall();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) atexit(ate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) make_private_tmp();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) /* Reserve fd 0 for 1-byte pipe ping from child. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) close(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) if (open("/", O_RDONLY|O_DIRECTORY|O_PATH) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) exec_fd = make_exe(payload, sizeof(payload));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) if (pipe(pipefd) == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) if (dup2(pipefd[1], 0) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) pid = fork();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) if (pid == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) if (pid == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) sys_execveat(exec_fd, "", NULL, NULL, AT_EMPTY_PATH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) char _;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) if (read(pipefd[0], &_, 1) != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) struct stat st;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) if (fstat(exec_fd, &st) == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) /* Generate "head -n1 /proc/$PID/maps" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) char buf0[256];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) memset(buf0, ' ', sizeof(buf0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) int len = snprintf(buf0, sizeof(buf0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) "%08lx-%08lx r-xp 00000000 %02lx:%02lx %llu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) VADDR, VADDR + PAGE_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) MAJOR(st.st_dev), MINOR(st.st_dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) (unsigned long long)st.st_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) buf0[len] = ' ';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) snprintf(buf0 + MAPS_OFFSET, sizeof(buf0) - MAPS_OFFSET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) "/tmp/#%llu (deleted)\n", (unsigned long long)st.st_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) /* Test /proc/$PID/maps */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) const size_t len = strlen(buf0) + (g_vsyscall ? strlen(str_vsyscall) : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) char buf[256];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) ssize_t rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) int fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) snprintf(buf, sizeof(buf), "/proc/%u/maps", pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) fd = open(buf, O_RDONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) if (fd == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) rv = read(fd, buf, sizeof(buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) assert(rv == len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) assert(memcmp(buf, buf0, strlen(buf0)) == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) if (g_vsyscall) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) assert(memcmp(buf + strlen(buf0), str_vsyscall, strlen(str_vsyscall)) == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) /* Test /proc/$PID/smaps */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) char buf[4096];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) ssize_t rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) int fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) snprintf(buf, sizeof(buf), "/proc/%u/smaps", pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) fd = open(buf, O_RDONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (fd == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) rv = read(fd, buf, sizeof(buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) assert(0 <= rv && rv <= sizeof(buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) assert(rv >= strlen(buf0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) assert(memcmp(buf, buf0, strlen(buf0)) == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) #define RSS1 "Rss: 4 kB\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) #define RSS2 "Rss: 0 kB\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) #define PSS1 "Pss: 4 kB\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) #define PSS2 "Pss: 0 kB\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) assert(memmem(buf, rv, RSS1, strlen(RSS1)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) memmem(buf, rv, RSS2, strlen(RSS2)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) assert(memmem(buf, rv, PSS1, strlen(PSS1)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) memmem(buf, rv, PSS2, strlen(PSS2)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) static const char *S[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) "Size: 4 kB\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) "KernelPageSize: 4 kB\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) "MMUPageSize: 4 kB\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) "Anonymous: 0 kB\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) "AnonHugePages: 0 kB\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) "Shared_Hugetlb: 0 kB\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) "Private_Hugetlb: 0 kB\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) "Locked: 0 kB\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) for (i = 0; i < sizeof(S)/sizeof(S[0]); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) assert(memmem(buf, rv, S[i], strlen(S[i])));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) if (g_vsyscall) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) assert(memmem(buf, rv, str_vsyscall, strlen(str_vsyscall)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) /* Test /proc/$PID/smaps_rollup */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) char bufr[256];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) memset(bufr, ' ', sizeof(bufr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) len = snprintf(bufr, sizeof(bufr),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) "%08lx-%08lx ---p 00000000 00:00 0",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) VADDR, VADDR + PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) bufr[len] = ' ';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) snprintf(bufr + MAPS_OFFSET, sizeof(bufr) - MAPS_OFFSET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) "[rollup]\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) char buf[1024];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) ssize_t rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) int fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) snprintf(buf, sizeof(buf), "/proc/%u/smaps_rollup", pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) fd = open(buf, O_RDONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) if (fd == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) rv = read(fd, buf, sizeof(buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) assert(0 <= rv && rv <= sizeof(buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) assert(rv >= strlen(bufr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) assert(memcmp(buf, bufr, strlen(bufr)) == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) assert(memmem(buf, rv, RSS1, strlen(RSS1)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) memmem(buf, rv, RSS2, strlen(RSS2)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) assert(memmem(buf, rv, PSS1, strlen(PSS1)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) memmem(buf, rv, PSS2, strlen(PSS2)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) static const char *S[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) "Anonymous: 0 kB\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) "AnonHugePages: 0 kB\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) "Shared_Hugetlb: 0 kB\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) "Private_Hugetlb: 0 kB\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) "Locked: 0 kB\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) for (i = 0; i < sizeof(S)/sizeof(S[0]); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) assert(memmem(buf, rv, S[i], strlen(S[i])));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) /* Test /proc/$PID/statm */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) char buf[64];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) ssize_t rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) int fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) snprintf(buf, sizeof(buf), "/proc/%u/statm", pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) fd = open(buf, O_RDONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) if (fd == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) rv = read(fd, buf, sizeof(buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) assert(rv == 7 * 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) assert(buf[0] == '1'); /* ->total_vm */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) assert(buf[1] == ' ');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) assert(buf[2] == '0' || buf[2] == '1'); /* rss */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) assert(buf[3] == ' ');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) assert(buf[4] == '0' || buf[2] == '1'); /* file rss */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) assert(buf[5] == ' ');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) assert(buf[6] == '1'); /* ELF executable segments */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) assert(buf[7] == ' ');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) assert(buf[8] == '0');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) assert(buf[9] == ' ');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) assert(buf[10] == '0'); /* ->data_vm + ->stack_vm */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) assert(buf[11] == ' ');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) assert(buf[12] == '0');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) assert(buf[13] == '\n');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) int main(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) return 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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