objtool: Create disassembly context

Create a structure to store information for disassembling functions.
For now, it is just a wrapper around an objtool file.

Signed-off-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Josh Poimboeuf <jpoimboe@kernel.org>
Link: https://patch.msgid.link/20251121095340.464045-3-alexandre.chartre@oracle.com

1 files changed, 30 insertions, 2 deletions

diff --git a/tools/objtool/disas.c b/tools/objtool/disas.c
index 3a7cb1b8002e..7a18e51d43e6 100644
--- a/tools/objtool/disas.c
+++ b/tools/objtool/disas.c
@@ -4,10 +4,35 @@
  */
 
 #include <objtool/arch.h>
+#include <objtool/disas.h>
 #include <objtool/warn.h>
 
 #include <linux/string.h>
 
+struct disas_context {
+	struct objtool_file *file;
+};
+
+struct disas_context *disas_context_create(struct objtool_file *file)
+{
+	struct disas_context *dctx;
+
+	dctx = malloc(sizeof(*dctx));
+	if (!dctx) {
+		WARN("failed to allocate disassembly context");
+		return NULL;
+	}
+
+	dctx->file = file;
+
+	return dctx;
+}
+
+void disas_context_destroy(struct disas_context *dctx)
+{
+	free(dctx);
+}
+
 /* 'funcs' is a space-separated list of function names */
 static void disas_funcs(const char *funcs)
 {
@@ -58,12 +83,15 @@ static void disas_funcs(const char *funcs)
 	}
 }
 
-void disas_warned_funcs(struct objtool_file *file)
+void disas_warned_funcs(struct disas_context *dctx)
 {
 	struct symbol *sym;
 	char *funcs = NULL, *tmp;
 
-	for_each_sym(file->elf, sym) {
+	if (!dctx)
+		return;
+
+	for_each_sym(dctx->file->elf, sym) {
 		if (sym->warned) {
 			if (!funcs) {
 				funcs = malloc(strlen(sym->name) + 1);