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libctf: Sanitize error types for PR 30836

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Made sure there is no implicit conversion between signed and unsigned
return value for functions setting the ctf_errno value.
An example of the problem is that in ctf_member_next, the "offset" value
is either 0L or (ctf_id_t)-1L, but it should have been 0L or -1L.
The issue was discovered while building a 64 bit ld binary to be
executed on the Windows platform.
Example object file that demonstrates the issue is attached in the PR.

libctf/
	Affected functions adjusted.

Signed-off-by: Torbjörn SVENSSON <torbjorn.svensson@foss.st.com>
Co-Authored-By: Yvan ROUX <yvan.roux@foss.st.com>
This commit is contained in:
Torbjörn SVENSSON
2023-09-13 11:02:36 +02:00
parent 22bfda88f8
commit 998a4f589d
8 changed files with 114 additions and 134 deletions
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libctf/ctf-impl.h
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@@ -741,7 +741,6 @@ extern struct ctf_archive *ctf_arc_open_internal (const char *, int *);
extern void ctf_arc_close_internal (struct ctf_archive *);
extern const ctf_preamble_t *ctf_arc_bufpreamble (const ctf_sect_t *);
extern void *ctf_set_open_errno (int *, int);
extern unsigned long ctf_set_errno (ctf_dict_t *, int);
extern void ctf_flip_header (ctf_header_t *);
extern int ctf_flip (ctf_dict_t *, ctf_header_t *, unsigned char *, int);