diff options
Diffstat (limited to 'sys/kern/imgact_elf.c')
| -rw-r--r-- | sys/kern/imgact_elf.c | 54 |
1 files changed, 29 insertions, 25 deletions
diff --git a/sys/kern/imgact_elf.c b/sys/kern/imgact_elf.c index 2690ad3b2679..5a53fac50f2c 100644 --- a/sys/kern/imgact_elf.c +++ b/sys/kern/imgact_elf.c @@ -84,6 +84,13 @@ #define ELF_NOTE_ROUNDSIZE 4 #define OLD_EI_BRAND 8 +/* + * ELF_ABI_NAME is a string name of the ELF ABI. ELF_ABI_ID is used + * to build variable names. + */ +#define ELF_ABI_NAME __XSTRING(__CONCAT(ELF, __ELF_WORD_SIZE)) +#define ELF_ABI_ID __CONCAT(elf, __ELF_WORD_SIZE) + static int __elfN(check_header)(const Elf_Ehdr *hdr); static Elf_Brandinfo *__elfN(get_brandinfo)(struct image_params *imgp, const char *interp, int32_t *osrel, uint32_t *fctl0); @@ -104,14 +111,15 @@ static Elf_Word __elfN(untrans_prot)(vm_prot_t); static size_t __elfN(prepare_register_notes)(struct thread *td, struct note_info_list *list, struct thread *target_td); -SYSCTL_NODE(_kern, OID_AUTO, __CONCAT(elf, __ELF_WORD_SIZE), - CTLFLAG_RW | CTLFLAG_MPSAFE, 0, +SYSCTL_NODE(_kern, OID_AUTO, ELF_ABI_ID, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, ""); +#define ELF_NODE_OID __CONCAT(_kern_, ELF_ABI_ID) + int __elfN(fallback_brand) = -1; -SYSCTL_INT(__CONCAT(_kern_elf, __ELF_WORD_SIZE), OID_AUTO, +SYSCTL_INT(ELF_NODE_OID, OID_AUTO, fallback_brand, CTLFLAG_RWTUN, &__elfN(fallback_brand), 0, - __XSTRING(__CONCAT(ELF, __ELF_WORD_SIZE)) " brand of last resort"); + ELF_ABI_NAME " brand of last resort"); static int elf_legacy_coredump = 0; SYSCTL_INT(_debug, OID_AUTO, __elfN(legacy_coredump), CTLFLAG_RW, @@ -126,22 +134,22 @@ int __elfN(nxstack) = #else 0; #endif -SYSCTL_INT(__CONCAT(_kern_elf, __ELF_WORD_SIZE), OID_AUTO, +SYSCTL_INT(ELF_NODE_OID, OID_AUTO, nxstack, CTLFLAG_RW, &__elfN(nxstack), 0, - __XSTRING(__CONCAT(ELF, __ELF_WORD_SIZE)) ": support PT_GNU_STACK for non-executable stack control"); + ELF_ABI_NAME ": support PT_GNU_STACK for non-executable stack control"); #if defined(__amd64__) static int __elfN(vdso) = 1; -SYSCTL_INT(__CONCAT(_kern_elf, __ELF_WORD_SIZE), OID_AUTO, +SYSCTL_INT(ELF_NODE_OID, OID_AUTO, vdso, CTLFLAG_RWTUN, &__elfN(vdso), 0, - __XSTRING(__CONCAT(ELF, __ELF_WORD_SIZE)) ": enable vdso preloading"); + ELF_ABI_NAME ": enable vdso preloading"); #else static int __elfN(vdso) = 0; #endif #if __ELF_WORD_SIZE == 32 && (defined(__amd64__) || defined(__i386__)) int i386_read_exec = 0; -SYSCTL_INT(_kern_elf32, OID_AUTO, read_exec, CTLFLAG_RW, &i386_read_exec, 0, +SYSCTL_INT(ELF_NODE_OID, OID_AUTO, read_exec, CTLFLAG_RW, &i386_read_exec, 0, "enable execution from readable segments"); #endif @@ -161,15 +169,15 @@ sysctl_pie_base(SYSCTL_HANDLER_ARGS) __elfN(pie_base) = val; return (0); } -SYSCTL_PROC(__CONCAT(_kern_elf, __ELF_WORD_SIZE), OID_AUTO, pie_base, +SYSCTL_PROC(ELF_NODE_OID, OID_AUTO, pie_base, CTLTYPE_ULONG | CTLFLAG_MPSAFE | CTLFLAG_RW, NULL, 0, sysctl_pie_base, "LU", "PIE load base without randomization"); -SYSCTL_NODE(__CONCAT(_kern_elf, __ELF_WORD_SIZE), OID_AUTO, aslr, +SYSCTL_NODE(ELF_NODE_OID, OID_AUTO, aslr, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, ""); -#define ASLR_NODE_OID __CONCAT(__CONCAT(_kern_elf, __ELF_WORD_SIZE), _aslr) +#define ASLR_NODE_OID __CONCAT(ELF_NODE_OID, _aslr) /* * Enable ASLR by default for 64-bit non-PIE binaries. 32-bit architectures @@ -179,8 +187,7 @@ SYSCTL_NODE(__CONCAT(_kern_elf, __ELF_WORD_SIZE), OID_AUTO, aslr, static int __elfN(aslr_enabled) = __ELF_WORD_SIZE == 64; SYSCTL_INT(ASLR_NODE_OID, OID_AUTO, enable, CTLFLAG_RWTUN, &__elfN(aslr_enabled), 0, - __XSTRING(__CONCAT(ELF, __ELF_WORD_SIZE)) - ": enable address map randomization"); + ELF_ABI_NAME ": enable address map randomization"); /* * Enable ASLR by default for 64-bit PIE binaries. @@ -188,8 +195,7 @@ SYSCTL_INT(ASLR_NODE_OID, OID_AUTO, enable, CTLFLAG_RWTUN, static int __elfN(pie_aslr_enabled) = __ELF_WORD_SIZE == 64; SYSCTL_INT(ASLR_NODE_OID, OID_AUTO, pie_enable, CTLFLAG_RWTUN, &__elfN(pie_aslr_enabled), 0, - __XSTRING(__CONCAT(ELF, __ELF_WORD_SIZE)) - ": enable address map randomization for PIE binaries"); + ELF_ABI_NAME ": enable address map randomization for PIE binaries"); /* * Sbrk is deprecated and it can be assumed that in most cases it will not be @@ -199,27 +205,25 @@ SYSCTL_INT(ASLR_NODE_OID, OID_AUTO, pie_enable, CTLFLAG_RWTUN, static int __elfN(aslr_honor_sbrk) = 0; SYSCTL_INT(ASLR_NODE_OID, OID_AUTO, honor_sbrk, CTLFLAG_RW, &__elfN(aslr_honor_sbrk), 0, - __XSTRING(__CONCAT(ELF, __ELF_WORD_SIZE)) ": assume sbrk is used"); + ELF_ABI_NAME ": assume sbrk is used"); static int __elfN(aslr_stack) = __ELF_WORD_SIZE == 64; SYSCTL_INT(ASLR_NODE_OID, OID_AUTO, stack, CTLFLAG_RWTUN, &__elfN(aslr_stack), 0, - __XSTRING(__CONCAT(ELF, __ELF_WORD_SIZE)) - ": enable stack address randomization"); + ELF_ABI_NAME ": enable stack address randomization"); static int __elfN(aslr_shared_page) = __ELF_WORD_SIZE == 64; SYSCTL_INT(ASLR_NODE_OID, OID_AUTO, shared_page, CTLFLAG_RWTUN, &__elfN(aslr_shared_page), 0, - __XSTRING(__CONCAT(ELF, __ELF_WORD_SIZE)) - ": enable shared page address randomization"); + ELF_ABI_NAME ": enable shared page address randomization"); static int __elfN(sigfastblock) = 1; -SYSCTL_INT(__CONCAT(_kern_elf, __ELF_WORD_SIZE), OID_AUTO, sigfastblock, +SYSCTL_INT(ELF_NODE_OID, OID_AUTO, sigfastblock, CTLFLAG_RWTUN, &__elfN(sigfastblock), 0, "enable sigfastblock for new processes"); static bool __elfN(allow_wx) = true; -SYSCTL_BOOL(__CONCAT(_kern_elf, __ELF_WORD_SIZE), OID_AUTO, allow_wx, +SYSCTL_BOOL(ELF_NODE_OID, OID_AUTO, allow_wx, CTLFLAG_RWTUN, &__elfN(allow_wx), 0, "Allow pages to be mapped simultaneously writable and executable"); @@ -2951,9 +2955,9 @@ __elfN(check_note)(struct image_params *imgp, Elf_Brandnote *brandnote, */ static struct execsw __elfN(execsw) = { .ex_imgact = __CONCAT(exec_, __elfN(imgact)), - .ex_name = __XSTRING(__CONCAT(ELF, __ELF_WORD_SIZE)) + .ex_name = ELF_ABI_NAME }; -EXEC_SET(__CONCAT(elf, __ELF_WORD_SIZE), __elfN(execsw)); +EXEC_SET(ELF_ABI_ID, __elfN(execsw)); static vm_prot_t __elfN(trans_prot)(Elf_Word flags) |