Toolchain/binutils-gdb
1
0
Fork 0
forked from Imagelibrary/binutils-gdb
Code Pull Requests Activity

libctf, create, types: encoding, BTF floats

Browse Source 
This adds support for the nearly useless BTF_KIND_FLOAT, under the name
CTF_K_BTF_FLOAT.  At the same time we fix up the ctf_add_encoding and
ctf_type_encoding machinery for the new API changes.

I expect this to change a bit: Ali Bahrami reckons I've oversimplified the
CTFv4 encoding representation and need to reintroduce at least a width.

New API:

ctf_id_t ctf_add_btf_float (ctf_dict_t *, uint32_t,
                            const char *, const ctf_encoding_t *);
This commit is contained in:
Nick Alcock
2025-04-24 17:28:34 +01:00
parent 03609073b0
commit 2c1a0a70d1
4 changed files with 46 additions and 36 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
libctf/ctf-types.c
View File

@@ -871,6 +871,7 @@ ctf_type_aname (ctf_dict_t *fp, ctf_id_t type)
case CTF_K_FLOAT:
case CTF_K_TYPEDEF:
/* Integers, floats, and typedefs must always be named types. */
case CTF_K_BTF_FLOAT:
if (name[0] == '\0')
{
@@ -1387,24 +1388,19 @@ int
ctf_type_encoding (ctf_dict_t *fp, ctf_id_t type, ctf_encoding_t *ep)
{
ctf_dict_t *ofp = fp;
ctf_dtdef_t *dtd;
const ctf_type_t *tp;
ssize_t increment;
const ctf_type_t *tp, *suffix;
const unsigned char *vlen;
uint32_t data;
if ((tp = ctf_lookup_by_id (&fp, type)) == NULL)
if ((tp = ctf_lookup_by_id (&fp, type, &suffix)) == NULL)
return -1; /* errno is set for us. */
if ((dtd = ctf_dynamic_type (ofp, type)) != NULL)
vlen = dtd->dtd_vlen;
else
{
ctf_get_ctt_size (fp, tp, NULL, &increment);
vlen = (const unsigned char *) ((uintptr_t) tp + increment);
}
if ((type = ctf_type_resolve (fp, type)) == CTF_ERR)
return (ctf_set_typed_errno (ofp, ECTF_NOTYPE));
switch (LCTF_INFO_KIND (fp, tp->ctt_info))
vlen = ctf_vlen (fp, type, tp, NULL);
switch (LCTF_KIND (fp, tp))
{
case CTF_K_INTEGER:
data = *(const uint32_t *) vlen;
@@ -1424,6 +1420,11 @@ ctf_type_encoding (ctf_dict_t *fp, ctf_id_t type, ctf_encoding_t *ep)
ep->cte_offset = 0;
ep->cte_bits = 0;
break;
case CTF_K_BTF_FLOAT:
ep->cte_format = 0;
ep->cte_offset = 0;
ep->cte_bits = suffix->ctt_size * CHAR_BIT;
break;
case CTF_K_SLICE:
{
const ctf_slice_t *slice;