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da67e6e62c
Attempting to retrieve an md_cval string from a kernel module with kldxref would throw a offset error for modules created using lld, since this value would be placed at the end of all allocated sections. Add an ef_read_seg_string method to the ef interface, to allow reading strings of varying size without attempting to read beyond the segment's bounds. PR: 224875 Submitted by: Mitchell Horne <mhorne063@gmail.com> Reviewed by: cem, kib Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D13923
74 lines
2.6 KiB
C
74 lines
2.6 KiB
C
/* $FreeBSD$ */
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#ifndef _EF_H_
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#define _EF_H_
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#define EFT_KLD 1
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#define EFT_KERNEL 2
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#define EF_RELOC_REL 1
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#define EF_RELOC_RELA 2
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#define EF_GET_TYPE(ef) \
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(ef)->ef_ops->get_type((ef)->ef_ef)
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#define EF_CLOSE(ef) \
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(ef)->ef_ops->close((ef)->ef_ef)
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#define EF_READ(ef, offset, len, dest) \
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(ef)->ef_ops->read((ef)->ef_ef, offset, len, dest)
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#define EF_READ_ENTRY(ef, offset, len, ptr) \
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(ef)->ef_ops->read_entry((ef)->ef_ef, offset, len, ptr)
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#define EF_SEG_READ(ef, offset, len, dest) \
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(ef)->ef_ops->seg_read((ef)->ef_ef, offset, len, dest)
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#define EF_SEG_READ_REL(ef, offset, len, dest) \
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(ef)->ef_ops->seg_read_rel((ef)->ef_ef, offset, len, dest)
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#define EF_SEG_READ_STRING(ef, offset, len, dest) \
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(ef)->ef_ops->seg_read_string((ef)->ef_ef, offset, len, dest)
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#define EF_SEG_READ_ENTRY(ef, offset, len, ptr) \
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(ef)->ef_ops->seg_read_entry((ef)->kf_ef, offset, len, ptr)
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#define EF_SEG_READ_ENTRY_REL(ef, offset, len, ptr) \
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(ef)->ef_ops->seg_read_entry_rel((ef)->ef_ef, offset, len, ptr)
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#define EF_SYMADDR(ef, symidx) \
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(ef)->ef_ops->symaddr((ef)->ef_ef, symidx)
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#define EF_LOOKUP_SET(ef, name, startp, stopp, countp) \
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(ef)->ef_ops->lookup_set((ef)->ef_ef, name, startp, stopp, countp)
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#define EF_LOOKUP_SYMBOL(ef, name, sym) \
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(ef)->ef_ops->lookup_symbol((ef)->ef_ef, name, sym)
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/* XXX, should have a different name. */
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typedef struct ef_file *elf_file_t;
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struct elf_file_ops {
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int (*get_type)(elf_file_t ef);
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int (*close)(elf_file_t ef);
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int (*read)(elf_file_t ef, Elf_Off offset, size_t len, void* dest);
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int (*read_entry)(elf_file_t ef, Elf_Off offset, size_t len,
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void **ptr);
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int (*seg_read)(elf_file_t ef, Elf_Off offset, size_t len, void *dest);
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int (*seg_read_rel)(elf_file_t ef, Elf_Off offset, size_t len,
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void *dest);
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int (*seg_read_string)(elf_file_t, Elf_Off offset, size_t len,
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char *dest);
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int (*seg_read_entry)(elf_file_t ef, Elf_Off offset, size_t len,
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void**ptr);
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int (*seg_read_entry_rel)(elf_file_t ef, Elf_Off offset, size_t len,
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void**ptr);
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Elf_Addr (*symaddr)(elf_file_t ef, Elf_Size symidx);
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int (*lookup_set)(elf_file_t ef, const char *name, long *startp,
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long *stopp, long *countp);
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int (*lookup_symbol)(elf_file_t ef, const char* name, Elf_Sym** sym);
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};
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struct elf_file {
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elf_file_t ef_ef;
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struct elf_file_ops *ef_ops;
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};
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__BEGIN_DECLS
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int ef_open(const char *filename, struct elf_file *ef, int verbose);
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int ef_obj_open(const char *filename, struct elf_file *ef, int verbose);
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int ef_reloc(struct elf_file *ef, const void *reldata, int reltype,
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Elf_Off relbase, Elf_Off dataoff, size_t len, void *dest);
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__END_DECLS
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#endif /* _EF_H_*/
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