radeon_elf_util.c revision 6974eb907600b9d0176d3158ff0fd30ac3e56a55 
1/*
2 * Copyright 2014 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 *
23 * Authors: Tom Stellard <thomas.stellard@amd.com>
24 *
25 */
26
27#include "radeon_elf_util.h"
28#include "r600_pipe_common.h"
29
30#include "util/u_memory.h"
31
32#include <gelf.h>
33#include <libelf.h>
34#include <stdio.h>
35
36void radeon_elf_read(const char *elf_data, unsigned elf_size,
37					struct radeon_shader_binary *binary,
38					unsigned debug)
39{
40	char *elf_buffer;
41	Elf *elf;
42	Elf_Scn *section = NULL;
43	size_t section_str_index;
44
45	/* One of the libelf implementations
46	 * (http://www.mr511.de/software/english.htm) requires calling
47	 * elf_version() before elf_memory().
48	 */
49	elf_version(EV_CURRENT);
50	elf_buffer = MALLOC(elf_size);
51	memcpy(elf_buffer, elf_data, elf_size);
52
53	elf = elf_memory(elf_buffer, elf_size);
54
55	elf_getshdrstrndx(elf, &section_str_index);
56	binary->disassembled = 0;
57
58	while ((section = elf_nextscn(elf, section))) {
59		const char *name;
60		Elf_Data *section_data = NULL;
61		GElf_Shdr section_header;
62		if (gelf_getshdr(section, &section_header) != &section_header) {
63			fprintf(stderr, "Failed to read ELF section header\n");
64			return;
65		}
66		name = elf_strptr(elf, section_str_index, section_header.sh_name);
67		if (!strcmp(name, ".text")) {
68			section_data = elf_getdata(section, section_data);
69			binary->code_size = section_data->d_size;
70			binary->code = MALLOC(binary->code_size * sizeof(unsigned char));
71			memcpy(binary->code, section_data->d_buf, binary->code_size);
72		} else if (!strcmp(name, ".AMDGPU.config")) {
73			section_data = elf_getdata(section, section_data);
74			binary->config_size = section_data->d_size;
75			binary->config = MALLOC(binary->config_size * sizeof(unsigned char));
76			memcpy(binary->config, section_data->d_buf, binary->config_size);
77		} else if (debug && !strcmp(name, ".AMDGPU.disasm")) {
78			binary->disassembled = 1;
79			section_data = elf_getdata(section, section_data);
80			fprintf(stderr, "\nShader Disassembly:\n\n");
81			fprintf(stderr, "%.*s\n", (int)section_data->d_size,
82						  (char *)section_data->d_buf);
83		}
84	}
85
86	if (elf){
87		elf_end(elf);
88	}
89	FREE(elf_buffer);
90}
91