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fpr=35CCFB63B283D6D3AEB783944CB5F6848BBC56EE X-Developer-Signature: v=1; a=openpgp-sha256; l=4692; i=samitolvanen@google.com; h=from:subject; bh=IxWZKsLfDtf9kxevQsdRvL9iAtwcYd0l83K436mpqAw=; b=owEB7QES/pANAwAKAUy19oSLvFbuAcsmYgBmvj04GkWhb24TKJqKw4JVSD8OHepYkerwtLdQx qaACpYCrKWJAbMEAAEKAB0WIQQ1zPtjsoPW0663g5RMtfaEi7xW7gUCZr49OAAKCRBMtfaEi7xW 7sWTDACcHTL9GfULRb2s9iLakapapeokqgn87VvgRoaESLeX4qLc/RanJQknVLtcLG6YhJp8RYv qRY2Rko4zoQCzFOWW8UPaaT4qc+mgEicvOfhMlLL8Rnw9kzYr5FSGz1n1Z8ALY0EsEOx3wtW/1k zuEpLF63tTCSLwE7scyHu2pF5B6aAhXbt427egI0quLd1Svj8a1D0fYSZKkb1F76YHEbiMGwyan JoIluQ0Fn9iFOzcXfVeGQWMlTF55oEKVU0lPOrtgtEdwL8o4aLUqI+UF9abnadVnptTuxVJ8WV9 4u6bmfWXL6SXXQwMSDkHaE712B0M7EXa23aBV3cLpglNfnQXKvv7U3MgyjoYRDnbAHo40UMWKiR UMTWMR+DcoOXWQ14S0LaPEr+tsiuwpJCzBLwcUcmMkhrR0KPZI9l5OFCrMHaabH+r0+8NaARQpd dzycoPwoG+9DjaCujbi6uQFh4iPqACsslbf0N/X03KJOJcuZWkndB3IjqDwtl88LliXeg= X-Mailer: git-send-email 2.46.0.184.g6999bdac58-goog Message-ID: <20240815173903.4172139-29-samitolvanen@google.com> Subject: [PATCH v2 08/19] gendwarfksyms: Expand subroutine_type From: Sami Tolvanen To: Masahiro Yamada , Luis Chamberlain , Miguel Ojeda , Greg Kroah-Hartman Cc: Matthew Maurer , Alex Gaynor , Wedson Almeida Filho , Gary Guo , Petr Pavlu , Neal Gompa , Hector Martin , Janne Grunau , Asahi Linux , linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-modules@vger.kernel.org, rust-for-linux@vger.kernel.org, Sami Tolvanen Add support for expanding DW_TAG_subroutine_type and the parameters in DW_TAG_formal_parameter. Use this to also expand subprograms. Example output with --debug: subprogram( formal_parameter base_type usize byte_size(8), formal_parameter base_type usize byte_size(8), ) -> base_type void; Signed-off-by: Sami Tolvanen --- scripts/gendwarfksyms/dwarf.c | 57 ++++++++++++++++++++++++++- scripts/gendwarfksyms/gendwarfksyms.h | 1 + 2 files changed, 57 insertions(+), 1 deletion(-) diff --git a/scripts/gendwarfksyms/dwarf.c b/scripts/gendwarfksyms/dwarf.c index 82185737fa2a..c81652426be8 100644 --- a/scripts/gendwarfksyms/dwarf.c +++ b/scripts/gendwarfksyms/dwarf.c @@ -210,6 +210,15 @@ DEFINE_PROCESS_UDATA_ATTRIBUTE(alignment) DEFINE_PROCESS_UDATA_ATTRIBUTE(byte_size) DEFINE_PROCESS_UDATA_ATTRIBUTE(encoding) +/* Match functions -- die_match_callback_t */ +#define DEFINE_MATCH(type) \ + static bool match_##type##_type(Dwarf_Die *die) \ + { \ + return dwarf_tag(die) == DW_TAG_##type##_type; \ + } + +DEFINE_MATCH(formal_parameter) + bool match_all(Dwarf_Die *die) { return true; @@ -247,6 +256,25 @@ static int process_type_attr(struct state *state, struct die *cache, return check(process(state, cache, "base_type void")); } +/* Comma-separated with DW_AT_type */ +static int __process_list_type(struct state *state, struct die *cache, + Dwarf_Die *die, const char *type) +{ + check(process(state, cache, type)); + check(process_type_attr(state, cache, die)); + check(process(state, cache, ",")); + return check(process_linebreak(cache, 0)); +} + +#define DEFINE_PROCESS_LIST_TYPE(type) \ + static int process_##type##_type(struct state *state, \ + struct die *cache, Dwarf_Die *die) \ + { \ + return __process_list_type(state, cache, die, #type " "); \ + } + +DEFINE_PROCESS_LIST_TYPE(formal_parameter) + /* Container types with DW_AT_type */ static int __process_type(struct state *state, struct die *cache, Dwarf_Die *die, const char *type) @@ -281,6 +309,29 @@ DEFINE_PROCESS_TYPE(shared) DEFINE_PROCESS_TYPE(volatile) DEFINE_PROCESS_TYPE(typedef) +static int __process_subroutine_type(struct state *state, struct die *cache, + Dwarf_Die *die, const char *type) +{ + check(process(state, cache, type)); + check(process(state, cache, "(")); + check(process_linebreak(cache, 1)); + /* Parameters */ + check(process_die_container(state, cache, die, process_type, + match_formal_parameter_type)); + check(process_linebreak(cache, -1)); + check(process(state, cache, ")")); + process_linebreak(cache, 0); + /* Return type */ + check(process(state, cache, "-> ")); + return check(process_type_attr(state, cache, die)); +} + +static int process_subroutine_type(struct state *state, struct die *cache, + Dwarf_Die *die) +{ + return check(__process_subroutine_type(state, cache, die, + "subroutine_type")); +} static int process_base_type(struct state *state, struct die *cache, Dwarf_Die *die) { @@ -358,8 +409,11 @@ static int process_type(struct state *state, struct die *parent, Dwarf_Die *die) PROCESS_TYPE(rvalue_reference) PROCESS_TYPE(shared) PROCESS_TYPE(volatile) + /* Subtypes */ + PROCESS_TYPE(formal_parameter) /* Other types */ PROCESS_TYPE(base) + PROCESS_TYPE(subroutine) PROCESS_TYPE(typedef) default: debug("unimplemented type: %x", tag); @@ -379,7 +433,8 @@ static int process_type(struct state *state, struct die *parent, Dwarf_Die *die) */ static int process_subprogram(struct state *state, Dwarf_Die *die) { - return check(process(state, NULL, "subprogram;\n")); + check(__process_subroutine_type(state, NULL, die, "subprogram")); + return check(process(state, NULL, ";\n")); } static int process_variable(struct state *state, Dwarf_Die *die) diff --git a/scripts/gendwarfksyms/gendwarfksyms.h b/scripts/gendwarfksyms/gendwarfksyms.h index e8b4da0fc9a8..25f87485eb69 100644 --- a/scripts/gendwarfksyms/gendwarfksyms.h +++ b/scripts/gendwarfksyms/gendwarfksyms.h @@ -59,6 +59,7 @@ extern bool debug; #define checkp(expr) __check(expr, __res < 0, __res) /* Consistent aliases (DW_TAG__type) for DWARF tags */ +#define DW_TAG_formal_parameter_type DW_TAG_formal_parameter #define DW_TAG_typedef_type DW_TAG_typedef /*