readelf: dump elf note data
Output format is compatible with GNU readelf's handling of unknown note types (modulo a GNU char signedness bug); future changes will add type- specific decoding. Reviewed by: kib MFC after: 1 week Relnotes: Yes Sponsored by: The FreeBSD Foundation
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=343614
@ -3567,6 +3567,7 @@ dump_notes_content(struct readelf *re, const char *buf, size_t sz, off_t off)
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{
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Elf_Note *note;
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const char *end, *name;
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uint32_t i;
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printf("\nNotes at offset %#010jx with length %#010jx:\n",
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(uintmax_t) off, (uintmax_t) sz);
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@ -3578,7 +3579,9 @@ dump_notes_content(struct readelf *re, const char *buf, size_t sz, off_t off)
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return;
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}
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note = (Elf_Note *)(uintptr_t) buf;
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name = (char *)(uintptr_t)(note + 1);
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buf += sizeof(Elf_Note);
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name = buf;
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buf += roundup2(note->n_namesz, 4);
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/*
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* The name field is required to be nul-terminated, and
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* n_namesz includes the terminating nul in observed
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@ -3596,8 +3599,11 @@ dump_notes_content(struct readelf *re, const char *buf, size_t sz, off_t off)
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printf(" %-13s %#010jx", name, (uintmax_t) note->n_descsz);
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printf(" %s\n", note_type(name, re->ehdr.e_type,
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note->n_type));
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buf += sizeof(Elf_Note) + roundup2(note->n_namesz, 4) +
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roundup2(note->n_descsz, 4);
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printf(" description data:");
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for (i = 0; i < note->n_descsz; i++)
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printf(" %02x", (unsigned char)buf[i]);
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printf("\n");
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buf += roundup2(note->n_descsz, 4);
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}
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}
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