+ if (section_name == NULL)
+ continue;
+
+ struct btf_var_secinfo info;
+
+ /* +1 for the sentinel type not in the types map. */
+ info.type = func_dtd->dtd_type + 1;
+
+ /* Both zero at compile time. */
+ info.size = 0;
+ info.offset = 0;
+
+ btf_datasec_push_entry (ctfc, section_name, info);
+ }
+ }
+
varpool_node *node;
FOR_EACH_VARIABLE (node)
{
@@ -317,28 +398,13 @@ btf_collect_datasec (ctf_container_ref ctfc)
if (dvd == NULL)
continue;
- const char *section_name = node->get_section ();
/* Mark extern variables. */
if (DECL_EXTERNAL (node->decl))
dvd->dvd_visibility = BTF_LINKAGE_EXTERN;
+ const char *section_name = get_section_name (node);
if (section_name == NULL)
- {
- switch (categorize_decl_for_section (node->decl, 0))
- {
- case SECCAT_BSS:
- section_name = ".bss";
- break;
- case SECCAT_DATA:
- section_name = ".data";
- break;
- case SECCAT_RODATA:
- section_name = ".rodata";
- break;
- default:
- continue;
- }
- }
+ continue;
struct btf_var_secinfo info;
@@ -363,6 +429,8 @@ btf_collect_datasec (ctf_container_ref ctfc)
btf_datasec_push_entry (ctfc, section_name, info);
}
+
+ num_types_created += datasecs.length ();
}
/* Return true if the type ID is that of a type which will not be emitted (for
@@ -461,29 +529,6 @@ btf_dtd_emit_preprocess_cb (ctf_container_ref ctfc,
ctf_dtdef_ref dtd)
if (!btf_emit_id_p (dtd->dtd_type))
return;
- uint32_t btf_kind
- = get_btf_kind (CTF_V2_INFO_KIND (dtd->dtd_data.ctti_info));
-
- if (btf_kind == BTF_KIND_FUNC_PROTO)
- {
- /* Functions actually get two types: a BTF_KIND_FUNC_PROTO, and
- also a BTF_KIND_FUNC. But the CTF container only allocates one
- type per function, which matches closely with BTF_KIND_FUNC_PROTO.
- For each such function, also allocate a BTF_KIND_FUNC entry.
- These will be output later. */
- ctf_dtdef_ref func_dtd = ggc_cleared_alloc<ctf_dtdef_t> ();
- func_dtd->dtd_data = dtd->dtd_data;
- func_dtd->dtd_data.ctti_type = dtd->dtd_type;
- func_dtd->linkage = dtd->linkage;
-
- vec_safe_push (funcs, func_dtd);
- num_types_created++;
-
- /* Only the BTF_KIND_FUNC type actually references the name. The
- BTF_KIND_FUNC_PROTO is always anonymous. */
- dtd->dtd_data.ctti_name = 0;
- }
-
ctfc->ctfc_num_vlen_bytes += btf_calc_num_vbytes (dtd);
}
diff --git a/gcc/testsuite/gcc.dg/debug/btf/btf-datasec-2.c b/gcc/testsuite/gcc.dg/debug/btf/btf-datasec-2.c
new file mode 100644
index 00000000000..f4b298cf019
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/debug/btf/btf-datasec-2.c
@@ -0,0 +1,28 @@
+/* Test BTF generation of DATASEC records for extern functions.
+
+ Only functions declared extern should have entries in DATASEC records. */
+
+/* { dg-do compile } */
+/* { dg-options "-O0 -gbtf -dA" } */
+
+/* Expect one DATASEC with vlen=1 (.foo_sec) and one with vlen=2 (.bar_sec) */
+/* { dg-final { scan-assembler-times "0xf000002\[\t \]+\[^\n\]*btt_info" 1 } }
*/
+/* { dg-final { scan-assembler-times "0xf000001\[\t \]+\[^\n\]*btt_info" 1 } }
*/
+
+/* Function entries should have offset and size of 0 at compile time. */
+/* { dg-final { scan-assembler-times "0\[\t \]+\[^\n\]*bts_offset" 3 } } */
+/* { dg-final { scan-assembler-times "0\[\t \]+\[^\n\]*bts_size" 3 } } */
+
+extern int foo (int a) __attribute__((section(".foo_sec")));
+
+
+extern int bar (int b) __attribute__((section(".bar_sec")));
+extern void chacha (void) __attribute__((section(".bar_sec")));
+
+__attribute__((section(".foo_sec")))
+void baz (int *x)
+{
+ chacha ();
+
+ *x = foo (bar (*x));
+}
diff --git a/gcc/testsuite/gcc.dg/debug/btf/btf-function-6.c
b/gcc/testsuite/gcc.dg/debug/btf/btf-function-6.c
new file mode 100644
index 00000000000..48a946ab14b
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/debug/btf/btf-function-6.c
@@ -0,0 +1,19 @@
+/* Test BTF extern linkage for functions.
+
+ We expect to see one BTF_KIND_FUNC type with global linkage (foo), and
+ one BTF_KIND_FUNC type with extern linkage (extfunc). */
+
+/* { dg-do compile } */
+/* { dg-options "-O0 -gbtf -dA" } */
+
+/* { dg-final { scan-assembler-times "btt_info: kind=12, kflag=0, linkage=2" 1
} } */
+/* { dg-final { scan-assembler-times "btt_info: kind=12, kflag=0, linkage=1" 1
} } */
+
+extern int extfunc(int a, int b);
+
+int foo (int x) {
+
+ int y = extfunc (x, x+1);
+
+ return y;
+}
diff --git a/include/btf.h b/include/btf.h
index 9a757ce5bc9..f41ea94b75f 100644
--- a/include/btf.h
+++ b/include/btf.h
@@ -186,12 +186,13 @@ struct btf_var
};
/* BTF_KIND_DATASEC is followed by VLEN struct btf_var_secinfo entries,
- which describe all BTF_KIND_VAR types contained in the section. */
+ which describe all BTF_KIND_VAR or extern BTF_KIND_FUNC types contained
+ in the section. */
struct btf_var_secinfo
{
- uint32_t type; /* Type of variable. */
- uint32_t offset; /* In-section offset of variable (in bytes). */
- uint32_t size; /* Size (in bytes) of variable. */
+ uint32_t type; /* Type of BTF_KIND_VAR or BTF_KIND_FUNC item. */
+ uint32_t offset; /* In-section offset (in bytes) of item. */
+ uint32_t size; /* Size (in bytes) of item. */
};
/* BTF_KIND_ENUM64 is followed by VLEN struct btf_enum64 entries,
