diff mbox series

[V3,1/3] debug: add BTF_WITH_CORE_DEBUG debug format

Message ID 1630418895-23520-2-git-send-email-indu.bhagat@oracle.com
State New
Headers show
Series Allow means for late BTF generation for BPF CO-RE | expand

Commit Message

Indu Bhagat Aug. 31, 2021, 2:08 p.m. UTC 
To best handle BTF/CO-RE in GCC, a distinct BTF_WITH_CORE_DEBUG debug format is
being added.  This helps the compiler detect whether BTF with CO-RE relocations
needs to be emitted.

gcc/ChangeLog:

	* flag-types.h (enum debug_info_type): Add new enum
	DINFO_TYPE_BTF_WITH_CORE.
	(BTF_WITH_CORE_DEBUG): New bitmask.
	* flags.h (btf_with_core_debuginfo_p): New declaration.
	* opts.c (btf_with_core_debuginfo_p): New definition.
---
 gcc/flag-types.h | 6 +++++-
 gcc/flags.h      | 4 ++++
 gcc/opts.c       | 8 ++++++++
 3 files changed, 17 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/gcc/flag-types.h b/gcc/flag-types.h
index 4fb1cb4..cc41b2a 100644
--- a/gcc/flag-types.h
+++ b/gcc/flag-types.h
@@ -31,7 +31,8 @@  enum debug_info_type
   DINFO_TYPE_VMS = 4,		  /* VMS debug info.  */
   DINFO_TYPE_CTF = 5,		  /* CTF debug info.  */
   DINFO_TYPE_BTF = 6,		  /* BTF debug info.  */
-  DINFO_TYPE_MAX = DINFO_TYPE_BTF /* Marker only.  */
+  DINFO_TYPE_BTF_WITH_CORE = 7,	  /* BTF debug info with CO-RE relocations.  */
+  DINFO_TYPE_MAX = DINFO_TYPE_BTF_WITH_CORE /* Marker only.  */
 };
 
 #define NO_DEBUG      (0U)
@@ -47,6 +48,9 @@  enum debug_info_type
 #define CTF_DEBUG     (1U << DINFO_TYPE_CTF)
 /* Write BTF debug info (using btfout.c).  */
 #define BTF_DEBUG     (1U << DINFO_TYPE_BTF)
+/* Write BTF debug info for BPF CO-RE usecase (using btfout.c).  */
+#define BTF_WITH_CORE_DEBUG     (1U << DINFO_TYPE_BTF_WITH_CORE)
+
 /* Note: Adding new definitions to handle -combination- of debug formats,
    like VMS_AND_DWARF2_DEBUG is not recommended.  This definition remains
    here for historical reasons.  */
diff --git a/gcc/flags.h b/gcc/flags.h
index afedef0..af61bcd 100644
--- a/gcc/flags.h
+++ b/gcc/flags.h
@@ -44,6 +44,10 @@  const char * debug_set_names (uint32_t w_symbols);
 
 extern bool btf_debuginfo_p ();
 
+/* Return true iff BTF with CO-RE debug info is enabled.  */
+
+extern bool btf_with_core_debuginfo_p ();
+
 /* Return true iff CTF debug info is enabled.  */
 
 extern bool ctf_debuginfo_p ();
diff --git a/gcc/opts.c b/gcc/opts.c
index e050155..1d2d22d 100644
--- a/gcc/opts.c
+++ b/gcc/opts.c
@@ -135,6 +135,14 @@  btf_debuginfo_p ()
   return (write_symbols & BTF_DEBUG);
 }
 
+/* Return TRUE iff BTF with CO-RE debug info is enabled.  */
+
+bool
+btf_with_core_debuginfo_p ()
+{
+  return (write_symbols & BTF_WITH_CORE_DEBUG);
+}
+
 /* Return TRUE iff CTF debug info is enabled.  */
 
 bool