13925 core files should include DWARF

Reviewed by: Rich Lowe <richlowe@richlowe.net>
Reviewed by: C Fraire <cfraire@me.com>
Reviewed by: Adam Leventhal <adam.leventhal@gmail.com>
Approved by: Dan McDonald <danmcd@joyent.com>

2 files changed, 218 insertions, 0 deletions

diff --git a/usr/src/common/core/core_shstrtab.c b/usr/src/common/core/core_shstrtab.c
new file mode 100644
index 0000000000..b1bcbce682
--- /dev/null
+++ b/usr/src/common/core/core_shstrtab.c
@@ -0,0 +1,145 @@
+/*
+ * This file and its contents are supplied under the terms of the
+ * Common Development and Distribution License ("CDDL"), version 1.0.
+ * You may only use this file in accordance with the terms of version
+ * 1.0 of the CDDL.
+ *
+ * A full copy of the text of the CDDL should have accompanied this
+ * source.  A copy of the CDDL is also available via the Internet at
+ * http://www.illumos.org/license/CDDL.
+ */
+
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*
+ * Copyright 2021 Oxide Computer Company
+ */
+
+#ifndef	_KERNEL
+#include <stdlib.h>
+#include <strings.h>
+#include <stddef.h>
+#else
+#include <sys/types.h>
+#include <sys/kmem.h>
+#include <sys/ddi.h>
+#include <sys/sunddi.h>
+#include <sys/stddef.h>
+#endif	/* _KERNEL */
+
+#include <core_shstrtab.h>
+
+const char *shstrtab_data[STR_NUM] = {
+	"",
+	".SUNW_ctf",
+	".symtab",
+	".dynsym",
+	".strtab",
+	".dynstr",
+	".shstrtab"
+};
+
+static void *
+shstrtab_alloc(void)
+{
+#ifdef	_KERNEL
+	return (kmem_zalloc(sizeof (shstrtab_ent_t),
+	    KM_NOSLEEP | KM_NORMALPRI));
+#else
+	return (calloc(1, sizeof (shstrtab_ent_t)));
+#endif
+}
+
+static void
+shstrtab_free(shstrtab_ent_t *ent)
+{
+#ifdef	_KERNEL
+	if (ent->sste_name != NULL) {
+		strfree(ent->sste_name);
+	}
+	kmem_free(ent, sizeof (*ent));
+#else
+	free(ent->sste_name);
+	free(ent);
+#endif
+}
+
+
+boolean_t
+shstrtab_ndx(shstrtab_t *s, const char *name, Elf32_Word *offp)
+{
+	shstrtab_ent_t *ent;
+
+	for (ent = list_head(&s->sst_names); ent != NULL;
+	    ent = list_next(&s->sst_names, ent)) {
+		if (strcmp(name, ent->sste_name) == 0) {
+			if (offp != NULL)
+				*offp = ent->sste_offset;
+			return (B_TRUE);
+		}
+	}
+
+	ent = shstrtab_alloc();
+	if (ent == NULL) {
+		return (B_FALSE);
+	}
+
+	ent->sste_name = strdup(name);
+	if (ent->sste_name == NULL) {
+		shstrtab_free(ent);
+		return (B_FALSE);
+	}
+	ent->sste_len = strlen(name) + 1;
+	ent->sste_offset = s->sst_len;
+	s->sst_len += ent->sste_len;
+
+	list_insert_tail(&s->sst_names, ent);
+
+	if (offp != NULL)
+		*offp = ent->sste_offset;
+	return (B_TRUE);
+}
+
+boolean_t
+shstrtab_init(shstrtab_t *s)
+{
+	bzero(s, sizeof (*s));
+	list_create(&s->sst_names, sizeof (shstrtab_ent_t),
+	    offsetof(shstrtab_ent_t, sste_link));
+
+	return (shstrtab_ndx(s, shstrtab_data[STR_NONE], NULL));
+}
+
+void
+shstrtab_fini(shstrtab_t *s)
+{
+	shstrtab_ent_t *ent;
+
+	if (s->sst_len == 0)
+		return;
+
+	while ((ent = list_remove_head(&s->sst_names)) != NULL) {
+		shstrtab_free(ent);
+	}
+}
+
+size_t
+shstrtab_size(const shstrtab_t *s)
+{
+	return (s->sst_len);
+}
+
+void
+shstrtab_dump(shstrtab_t *s, void *buf)
+{
+	size_t off = 0;
+
+	for (shstrtab_ent_t *ent = list_head(&s->sst_names); ent != NULL;
+	    ent = list_next(&s->sst_names, ent)) {
+		bcopy(ent->sste_name, buf + off, ent->sste_len);
+		off += ent->sste_len;
+	}
+}
diff --git a/usr/src/common/core/core_shstrtab.h b/usr/src/common/core/core_shstrtab.h
new file mode 100644
index 0000000000..111c3226a8
--- /dev/null
+++ b/usr/src/common/core/core_shstrtab.h
@@ -0,0 +1,73 @@
+/*
+ * This file and its contents are supplied under the terms of the
+ * Common Development and Distribution License ("CDDL"), version 1.0.
+ * You may only use this file in accordance with the terms of version
+ * 1.0 of the CDDL.
+ *
+ * A full copy of the text of the CDDL should have accompanied this
+ * source.  A copy of the CDDL is also available via the Internet at
+ * http://www.illumos.org/license/CDDL.
+ */
+
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*
+ * Copyright 2021 Oxide Computer Company
+ */
+
+#ifndef _CORE_SHSTRTAB_H
+#define	_CORE_SHSTRTAB_H
+
+/*
+ * This header contains common definitions that are used to generate a
+ * shstrtab_t for core files. This is used by libproc and the kernel to generate
+ * core files in a similar way.
+ */
+
+#include <sys/list.h>
+#include <sys/stdint.h>
+#include <sys/elf.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum {
+	STR_NONE,
+	STR_CTF,
+	STR_SYMTAB,
+	STR_DYNSYM,
+	STR_STRTAB,
+	STR_DYNSTR,
+	STR_SHSTRTAB,
+	STR_NUM
+} shstrtype_t;
+
+extern const char *shstrtab_data[STR_NUM];
+
+typedef struct shstrtab_ent {
+	list_node_t	sste_link;
+	char		*sste_name;
+	size_t		sste_len;
+	uint32_t	sste_offset;
+} shstrtab_ent_t;
+
+typedef struct shstrtab {
+	list_t		sst_names;
+	uint32_t	sst_len;
+} shstrtab_t;
+
+extern boolean_t shstrtab_init(shstrtab_t *s);
+extern boolean_t shstrtab_ndx(shstrtab_t *, const char *, Elf32_Word *);
+extern void shstrtab_fini(shstrtab_t *);
+extern size_t shstrtab_size(const shstrtab_t *);
+extern void shstrtab_dump(shstrtab_t *, void *);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _CORE_SHSTRTAB_H */