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Differential D7944 Diff 20464 head/usr.bin/elfdump/elfdump.c

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head/usr.bin/elfdump/elfdump.c

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#include <err.h> #include <err.h>
#include <errno.h> #include <errno.h>
#include <fcntl.h> #include <fcntl.h>
#include <inttypes.h> #include <inttypes.h>
#include <stddef.h> #include <stddef.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <termios.h>
#include <unistd.h> #include <unistd.h>
#define ED_DYN (1<<0) #define ED_DYN (1<<0)
#define ED_EHDR (1<<1) #define ED_EHDR (1<<1)
#define ED_GOT (1<<2) #define ED_GOT (1<<2)
#define ED_HASH (1<<3) #define ED_HASH (1<<3)
#define ED_INTERP (1<<4) #define ED_INTERP (1<<4)
#define ED_NOTE (1<<5) #define ED_NOTE (1<<5)
▲ Show 20 Lines • Show All 444 Lines • ▼ Show 20 Linesmain(int ac, char **av)
u_int64_t phnum; u_int64_t phnum;
u_int64_t shentsize; u_int64_t shentsize;
u_int64_t shnum; u_int64_t shnum;
u_int64_t shstrndx; u_int64_t shstrndx;
u_int64_t offset; u_int64_t offset;
u_int64_t name; u_int64_t name;
u_int64_t type; u_int64_t type;
struct stat sb; struct stat sb;
unsigned long cmd;
u_int flags; u_int flags;
Elf32_Ehdr *e; Elf32_Ehdr *e;
void *p; void *p;
void *sh; void *sh;
void *v; void *v;
int fd; int fd;
int ch; int ch;
int i; int i;
▲ Show 20 Lines • Show All 52 Lines • ▼ Show 20 Lines if (ac == 0 || flags == 0)
usage(); usage();
if ((fd = open(*av, O_RDONLY)) < 0 || if ((fd = open(*av, O_RDONLY)) < 0 ||
fstat(fd, &sb) < 0) fstat(fd, &sb) < 0)
err(1, "%s", *av); err(1, "%s", *av);
cap_rights_init(&rights, CAP_MMAP_R); cap_rights_init(&rights, CAP_MMAP_R);
if (cap_rights_limit(fd, &rights) < 0 && errno != ENOSYS) if (cap_rights_limit(fd, &rights) < 0 && errno != ENOSYS)
err(1, "unable to limit rights for %s", *av); err(1, "unable to limit rights for %s", *av);
close(STDIN_FILENO); close(STDIN_FILENO);
cap_rights_init(&rights, CAP_WRITE); cap_rights_init(&rights, CAP_FSTAT, CAP_IOCTL, CAP_WRITE);
if (cap_rights_limit(STDOUT_FILENO, &rights) < 0 && errno != ENOSYS) cmd = TIOCGETA; /* required by isatty(3) in printf(3) */
err(1, "unable to limit rights for stdout"); if ((cap_rights_limit(STDOUT_FILENO, &rights) < 0 && errno != ENOSYS) ||
if (cap_rights_limit(STDERR_FILENO, &rights) < 0 && errno != ENOSYS) (cap_ioctls_limit(STDOUT_FILENO, &cmd, 1) < 0 && errno != ENOSYS) ||
err(1, "unable to limit rights for stderr"); (cap_rights_limit(STDERR_FILENO, &rights) < 0 && errno != ENOSYS) ||
(cap_ioctls_limit(STDERR_FILENO, &cmd, 1) < 0 && errno != ENOSYS))
err(1, "unable to limit rights for stdout/stderr");
if (cap_enter() < 0 && errno != ENOSYS) if (cap_enter() < 0 && errno != ENOSYS)
err(1, "unable to enter capability mode"); err(1, "unable to enter capability mode");
e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0); e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0);
if (e == MAP_FAILED) if (e == MAP_FAILED)
err(1, NULL); err(1, NULL);
if (!IS_ELF(*(Elf32_Ehdr *)e)) if (!IS_ELF(*(Elf32_Ehdr *)e))
errx(1, "not an elf file"); errx(1, "not an elf file");
phoff = elf_get_off(e, e, E_PHOFF); phoff = elf_get_off(e, e, E_PHOFF);
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