コード例 #1
0
int
gelf_update_rela(Elf_Data *d, int ndx, GElf_Rela *dr)
{
	int ec;
	Elf *e;
	Elf_Scn *scn;
	Elf32_Rela *rela32;
	Elf64_Rela *rela64;
	size_t msz;
	uint32_t sh_type;

	if (d == NULL || ndx < 0 || dr == NULL ||
	    (scn = d->d_scn) == NULL ||
	    (e = scn->s_elf) == NULL) {
		LIBELF_SET_ERROR(ARGUMENT, 0);
		return (0);
	}

	ec = e->e_class;
	assert(ec == ELFCLASS32 || ec == ELFCLASS64);

	if (ec == ELFCLASS32)
		sh_type = scn->s_shdr.s_shdr32.sh_type;
	else
		sh_type = scn->s_shdr.s_shdr64.sh_type;

	if (_libelf_xlate_shtype(sh_type) != ELF_T_RELA) {
		LIBELF_SET_ERROR(ARGUMENT, 0);
		return (0);
	}

	msz = _libelf_msize(ELF_T_RELA, ec, e->e_version);
	assert(msz > 0);

	if (msz * ndx >= d->d_size) {
		LIBELF_SET_ERROR(ARGUMENT, 0);
		return (0);
	}

	if (ec == ELFCLASS32) {
		rela32 = (Elf32_Rela *) d->d_buf + ndx;

		LIBELF_COPY_U32(rela32, dr, r_offset);

		if (ELF64_R_SYM(dr->r_info) > ELF32_R_SYM(~0UL) ||
		    ELF64_R_TYPE(dr->r_info) > ELF32_R_TYPE(~0U)) {
			LIBELF_SET_ERROR(RANGE, 0);
			return (0);
		}
		rela32->r_info = ELF32_R_INFO(ELF64_R_SYM(dr->r_info),
		    ELF64_R_TYPE(dr->r_info));

		LIBELF_COPY_S32(rela32, dr, r_addend);
	} else {
		rela64 = (Elf64_Rela *) d->d_buf + ndx;

		*rela64 = *dr;
	}

	return (1);
}
コード例 #2
0
ファイル: elf_data.c プロジェクト: AndrewScull/freebsd
Elf_Data *
elf_getdata(Elf_Scn *s, Elf_Data *ed)
{
	Elf *e;
	unsigned int sh_type;
	int elfclass, elftype;
	size_t count, fsz, msz;
	struct _Libelf_Data *d;
	uint64_t sh_align, sh_offset, sh_size;
	int (*xlate)(unsigned char *_d, size_t _dsz, unsigned char *_s,
	    size_t _c, int _swap);

	d = (struct _Libelf_Data *) ed;

	if (s == NULL || (e = s->s_elf) == NULL ||
	    (d != NULL && s != d->d_scn)) {
		LIBELF_SET_ERROR(ARGUMENT, 0);
		return (NULL);
	}

	assert(e->e_kind == ELF_K_ELF);

	if (d == NULL && (d = STAILQ_FIRST(&s->s_data)) != NULL)
		return (&d->d_data);

	if (d != NULL)
		return (&STAILQ_NEXT(d, d_next)->d_data);

	if (e->e_rawfile == NULL) {
		/*
		 * In the ELF_C_WRITE case, there is no source that
		 * can provide data for the section.
		 */
		LIBELF_SET_ERROR(ARGUMENT, 0);
		return (NULL);
	}

	elfclass = e->e_class;

	assert(elfclass == ELFCLASS32 || elfclass == ELFCLASS64);

	if (elfclass == ELFCLASS32) {
		sh_type   = s->s_shdr.s_shdr32.sh_type;
		sh_offset = (uint64_t) s->s_shdr.s_shdr32.sh_offset;
		sh_size   = (uint64_t) s->s_shdr.s_shdr32.sh_size;
		sh_align  = (uint64_t) s->s_shdr.s_shdr32.sh_addralign;
	} else {
		sh_type   = s->s_shdr.s_shdr64.sh_type;
		sh_offset = s->s_shdr.s_shdr64.sh_offset;
		sh_size   = s->s_shdr.s_shdr64.sh_size;
		sh_align  = s->s_shdr.s_shdr64.sh_addralign;
	}

	if (sh_type == SHT_NULL) {
		LIBELF_SET_ERROR(SECTION, 0);
		return (NULL);
	}

	if ((elftype = _libelf_xlate_shtype(sh_type)) < ELF_T_FIRST ||
	    elftype > ELF_T_LAST || (sh_type != SHT_NOBITS &&
	    sh_offset + sh_size > (uint64_t) e->e_rawsize)) {
		LIBELF_SET_ERROR(SECTION, 0);
		return (NULL);
	}

	if ((fsz = (elfclass == ELFCLASS32 ? elf32_fsize : elf64_fsize)
            (elftype, (size_t) 1, e->e_version)) == 0) {
		LIBELF_SET_ERROR(UNIMPL, 0);
		return (NULL);
	}

	if (sh_size % fsz) {
		LIBELF_SET_ERROR(SECTION, 0);
		return (NULL);
	}

	if (sh_size / fsz > SIZE_MAX) {
		LIBELF_SET_ERROR(RANGE, 0);
		return (NULL);
	}

	count = (size_t) (sh_size / fsz);

	msz = _libelf_msize(elftype, elfclass, e->e_version);

	if (count > 0 && msz > SIZE_MAX / count) {
		LIBELF_SET_ERROR(RANGE, 0);
		return (NULL);
	}

	assert(msz > 0);
	assert(count <= SIZE_MAX);
	assert(msz * count <= SIZE_MAX);

	if ((d = _libelf_allocate_data(s)) == NULL)
		return (NULL);

	d->d_data.d_buf     = NULL;
	d->d_data.d_off     = 0;
	d->d_data.d_align   = sh_align;
	d->d_data.d_size    = msz * count;
	d->d_data.d_type    = elftype;
	d->d_data.d_version = e->e_version;

	if (sh_type == SHT_NOBITS || sh_size == 0) {
	        STAILQ_INSERT_TAIL(&s->s_data, d, d_next);
		return (&d->d_data);
        }

	if ((d->d_data.d_buf = malloc(msz * count)) == NULL) {
		(void) _libelf_release_data(d);
		LIBELF_SET_ERROR(RESOURCE, 0);
		return (NULL);
	}

	d->d_flags  |= LIBELF_F_DATA_MALLOCED;

	xlate = _libelf_get_translator(elftype, ELF_TOMEMORY, elfclass);
	if (!(*xlate)(d->d_data.d_buf, (size_t) d->d_data.d_size,
	    e->e_rawfile + sh_offset, count,
	    e->e_byteorder != LIBELF_PRIVATE(byteorder))) {
		_libelf_release_data(d);
		LIBELF_SET_ERROR(DATA, 0);
		return (NULL);
	}

	STAILQ_INSERT_TAIL(&s->s_data, d, d_next);

	return (&d->d_data);
}
コード例 #3
0
ファイル: gelf_rela.c プロジェクト: emaste/elftoolchain
GElf_Rela *
gelf_getrela(Elf_Data *ed, int ndx, GElf_Rela *dst)
{
	int ec;
	Elf *e;
	size_t msz;
	Elf_Scn *scn;
	uint32_t sh_type;
	Elf32_Rela *rela32;
	Elf64_Rela *rela64;
	struct _Libelf_Data *d;

	d = (struct _Libelf_Data *) ed;

	if (d == NULL || ndx < 0 || dst == NULL ||
	    (scn = d->d_scn) == NULL ||
	    (e = scn->s_elf) == NULL) {
		LIBELF_SET_ERROR(ARGUMENT, 0);
		return (NULL);
	}

	ec = e->e_class;
	assert(ec == ELFCLASS32 || ec == ELFCLASS64);

	if (ec == ELFCLASS32)
		sh_type = scn->s_shdr.s_shdr32.sh_type;
	else
		sh_type = scn->s_shdr.s_shdr64.sh_type;

	if (_libelf_xlate_shtype(sh_type) != ELF_T_RELA) {
		LIBELF_SET_ERROR(ARGUMENT, 0);
		return (NULL);
	}

	msz = _libelf_msize(ELF_T_RELA, ec, e->e_version);

	assert(msz > 0);
	assert(ndx >= 0);

	if (msz * (size_t) ndx >= d->d_data.d_size) {
		LIBELF_SET_ERROR(ARGUMENT, 0);
		return (NULL);
	}

	if (ec == ELFCLASS32) {
		rela32 = (Elf32_Rela *) d->d_data.d_buf + ndx;

		dst->r_offset = (Elf64_Addr) rela32->r_offset;
		dst->r_info   = ELF64_R_INFO(
		    (Elf64_Xword) ELF32_R_SYM(rela32->r_info),
		    ELF32_R_TYPE(rela32->r_info));
		dst->r_addend = (Elf64_Sxword) rela32->r_addend;

	} else {

		rela64 = (Elf64_Rela *) d->d_data.d_buf + ndx;

		*dst = *rela64;
	}

	return (dst);
}
コード例 #4
0
ファイル: elf_data.c プロジェクト: AndrewScull/gem5
Elf_Data *
elf_getdata(Elf_Scn *s, Elf_Data *d)
{
        Elf *e;
        char *dst;
        size_t fsz, msz, count;
        int elfclass, elftype;
        unsigned int sh_type;
        uint64_t sh_align, sh_offset, sh_size;
        void (*xlate)(char *_d, char *_s, size_t _c, int _swap);

        if (s == NULL || (e = s->s_elf) == NULL || e->e_kind != ELF_K_ELF ||
            (d != NULL && s != d->d_scn)) {
                LIBELF_SET_ERROR(ARGUMENT, 0);
                return (NULL);
        }

        if (d == NULL && (d = STAILQ_FIRST(&s->s_data)) != NULL)
                return (d);

        if (d != NULL)
                return (STAILQ_NEXT(d, d_next));

        if (e->e_rawfile == NULL) {
                LIBELF_SET_ERROR(SEQUENCE, 0);
                return (NULL);
        }

        elfclass = e->e_class;

        assert(elfclass == ELFCLASS32 || elfclass == ELFCLASS64);

        if (elfclass == ELFCLASS32) {
                sh_type   = s->s_shdr.s_shdr32.sh_type;
                sh_offset = (uint64_t) s->s_shdr.s_shdr32.sh_offset;
                sh_size   = (uint64_t) s->s_shdr.s_shdr32.sh_size;
                sh_align  = (uint64_t) s->s_shdr.s_shdr32.sh_addralign;
        } else {
                sh_type   = s->s_shdr.s_shdr64.sh_type;
                sh_offset = s->s_shdr.s_shdr64.sh_offset;
                sh_size   = s->s_shdr.s_shdr64.sh_size;
                sh_align  = s->s_shdr.s_shdr64.sh_addralign;
        }

        if ((elftype = _libelf_xlate_shtype(sh_type)) < ELF_T_FIRST ||
            elftype > ELF_T_LAST ||
            sh_offset + sh_size > (uint64_t) e->e_rawsize) {
                LIBELF_SET_ERROR(SECTION, 0);
                return (NULL);
        }

        if ((fsz = (elfclass == ELFCLASS32 ? elf32_fsize : elf64_fsize)(elftype,
                 (size_t) 1, e->e_version)) == 0) {
                LIBELF_SET_ERROR(UNIMPL, 0);
                return (NULL);
        }


        if (sh_size % fsz) {
                LIBELF_SET_ERROR(SECTION, 0);
                return (NULL);
        }

        count = sh_size / fsz;

        msz = _libelf_msize(elftype, elfclass, e->e_version);

        assert(msz > 0);

        if ((dst = malloc(msz*count)) == NULL) {
                LIBELF_SET_ERROR(RESOURCE, 0);
                return (NULL);
        }

        if ((d = _libelf_allocate_data(s)) == NULL)
                return (NULL);

        d->d_buf     = dst;
        d->d_off     = 0;
        d->d_align   = sh_align;
        d->d_size    = msz * count;
        d->d_type    = elftype;
        d->d_version = e->e_version;

        d->d_flags  |= LIBELF_F_MALLOCED;
        STAILQ_INSERT_TAIL(&s->s_data, d, d_next);

        xlate = _libelf_get_translator(elftype, ELF_TOMEMORY, elfclass);
        (*xlate)(d->d_buf, e->e_rawfile + sh_offset, count, e->e_byteorder !=
            LIBELF_PRIVATE(byteorder));

        return (d);
}
コード例 #5
0
GElf_Sym *
gelf_getsym(Elf_Data *ed, int ndx, GElf_Sym *dst)
{
	int ec;
	Elf *e;
	size_t msz;
	Elf_Scn *scn;
	uint32_t sh_type;
	Elf32_Sym *sym32;
	Elf64_Sym *sym64;
	struct _Libelf_Data *d;

	d = (struct _Libelf_Data *) ed;

	if (d == NULL || ndx < 0 || dst == NULL ||
	    (scn = d->d_scn) == NULL ||
	    (e = scn->s_elf) == NULL) {
		LIBELF_SET_ERROR(ARGUMENT, 0);
		return (NULL);
	}

	ec = e->e_class;
	assert(ec == ELFCLASS32 || ec == ELFCLASS64);

	if (ec == ELFCLASS32)
		sh_type = scn->s_shdr.s_shdr32.sh_type;
	else
		sh_type = scn->s_shdr.s_shdr64.sh_type;

	if (_libelf_xlate_shtype(sh_type) != ELF_T_SYM) {
		LIBELF_SET_ERROR(ARGUMENT, 0);
		return (NULL);
	}

	msz = _libelf_msize(ELF_T_SYM, ec, e->e_version);

	assert(msz > 0);

	if (msz * ndx >= d->d_data.d_size) {
		LIBELF_SET_ERROR(ARGUMENT, 0);
		return (NULL);
	}

	if (ec == ELFCLASS32) {

		sym32 = (Elf32_Sym *) d->d_data.d_buf + ndx;

		dst->st_name  = sym32->st_name;
		dst->st_value = (Elf64_Addr) sym32->st_value;
		dst->st_size  = (Elf64_Xword) sym32->st_size;
		dst->st_info  = ELF64_ST_INFO(ELF32_ST_BIND(sym32->st_info),
		    ELF32_ST_TYPE(sym32->st_info));
		dst->st_other = sym32->st_other;
		dst->st_shndx = sym32->st_shndx;
	} else {

		sym64 = (Elf64_Sym *) d->d_data.d_buf + ndx;

		*dst = *sym64;
	}

	return (dst);
}