From 5e0b8d508ed51004bd836384293be00950ee62c9 Mon Sep 17 00:00:00 2001
From: Pasha <pasha@member.fsf.org>
Date: Tue, 20 Feb 2024 18:49:50 +0000
Subject: init gnumach copy

---
 ddb/db_ext_symtab.c | 123 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 ddb/db_ext_symtab.c

(limited to 'ddb/db_ext_symtab.c')

diff --git a/ddb/db_ext_symtab.c b/ddb/db_ext_symtab.c
new file mode 100644
index 0000000..db7bec2
--- /dev/null
+++ b/ddb/db_ext_symtab.c
@@ -0,0 +1,123 @@
+/*
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989 Carnegie Mellon University
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+
+#if MACH_KDB
+
+#if	MACH_DEBUG
+
+#include <mach/mach_types.h>	/* vm_address_t */
+#include <mach/std_types.h>	/* pointer_t */
+#include <mach/vm_param.h>
+#include <vm/vm_map.h>
+#include <vm/vm_kern.h>
+#include <vm/vm_user.h>
+#include <kern/host.h>
+#include <kern/mach_debug.server.h>
+#include <kern/task.h>
+#include <ddb/db_sym.h>
+
+
+
+/*
+ *	Loads a symbol table for an external file into the kernel debugger.
+ *	The symbol table data is an array of characters.  It is assumed that
+ *	the caller and the kernel debugger agree on its format.
+ */
+kern_return_t
+host_load_symbol_table(
+	host_t		host,
+	task_t		task,
+	const char *	name,
+	pointer_t	symtab,
+	unsigned int	symtab_count)
+{
+	kern_return_t	result;
+	vm_offset_t	symtab_start;
+	vm_offset_t	symtab_end;
+	vm_map_t	map;
+	vm_map_copy_t	symtab_copy_object;
+
+	if (host == HOST_NULL)
+	    return (KERN_INVALID_ARGUMENT);
+
+	/*
+	 * Copy the symbol table array into the kernel.
+	 * We make a copy of the copy object, and clear
+	 * the old one, so that returning error will not
+	 * deallocate the data twice.
+	 */
+	symtab_copy_object = (vm_map_copy_t) symtab;
+	result = vm_map_copyout(
+			kernel_map,
+			&symtab_start,
+			vm_map_copy_copy(symtab_copy_object));
+	if (result != KERN_SUCCESS)
+	    return (result);
+
+	symtab_end = symtab_start + symtab_count;
+
+	/*
+	 * Add the symbol table.
+	 * Do not keep a reference for the task map.	XXX
+	 */
+	if (task == TASK_NULL)
+	    map = VM_MAP_NULL;
+	else
+	    map = task->map;
+	if (!X_db_sym_init((char *)symtab_start,
+			(char *)symtab_end,
+			name,
+			(char *)map))
+	{
+	    /*
+	     * Not enough room for symbol table - failure.
+	     */
+	    (void) vm_deallocate(kernel_map,
+			symtab_start,
+			symtab_count);
+	    return (KERN_FAILURE);
+	}
+
+	/*
+	 * Wire down the symbol table
+	 */
+	(void) vm_map_pageable(kernel_map,
+		symtab_start,
+		round_page(symtab_end),
+		VM_PROT_READ|VM_PROT_WRITE,
+		TRUE, TRUE);
+
+	/*
+	 * Discard the original copy object
+	 */
+	vm_map_copy_discard(symtab_copy_object);
+
+	return (KERN_SUCCESS);
+}
+
+#endif	/* MACH_DEBUG */
+
+#endif /* MACH_KDB */
-- 
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