Masahiro Yamada | c43d685 | 2018-01-26 11:42:01 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <assert.h> |
Masahiro Yamada | c43d685 | 2018-01-26 11:42:01 +0900 | [diff] [blame] | 8 | #include <errno.h> |
| 9 | #include <string.h> |
Antonio Nino Diaz | 09d40e0 | 2018-12-14 00:18:21 +0000 | [diff] [blame] | 10 | |
| 11 | #include <common/debug.h> |
| 12 | #include <lib/utils.h> |
Masahiro Yamada | c43d685 | 2018-01-26 11:42:01 +0900 | [diff] [blame] | 13 | #include <tf_gunzip.h> |
Masahiro Yamada | c43d685 | 2018-01-26 11:42:01 +0900 | [diff] [blame] | 14 | |
| 15 | #include "zutil.h" |
| 16 | |
| 17 | /* |
| 18 | * memory allocated by malloc() is supposed to be aligned for any built-in type |
| 19 | */ |
| 20 | #define ZALLOC_ALIGNMENT sizeof(void *) |
| 21 | |
| 22 | static uintptr_t zalloc_start; |
| 23 | static uintptr_t zalloc_end; |
| 24 | static uintptr_t zalloc_current; |
| 25 | |
| 26 | static void * ZLIB_INTERNAL zcalloc(void *opaque, unsigned int items, |
| 27 | unsigned int size) |
| 28 | { |
| 29 | uintptr_t p, p_end; |
| 30 | |
| 31 | size *= items; |
| 32 | |
| 33 | p = round_up(zalloc_current, ZALLOC_ALIGNMENT); |
| 34 | p_end = p + size; |
| 35 | |
| 36 | if (p_end > zalloc_end) |
| 37 | return NULL; |
| 38 | |
| 39 | memset((void *)p, 0, size); |
| 40 | |
| 41 | zalloc_current = p_end; |
| 42 | |
| 43 | return (void *)p; |
| 44 | } |
| 45 | |
| 46 | static void ZLIB_INTERNAL zfree(void *opaque, void *ptr) |
| 47 | { |
| 48 | } |
| 49 | |
| 50 | /* |
| 51 | * gunzip - decompress gzip data |
| 52 | * @in_buf: source of compressed input. Upon exit, the end of input. |
| 53 | * @in_len: length of in_buf |
| 54 | * @out_buf: destination of decompressed output. Upon exit, the end of output. |
| 55 | * @out_len: length of out_buf |
| 56 | * @work_buf: workspace |
| 57 | * @work_len: length of workspace |
| 58 | */ |
| 59 | int gunzip(uintptr_t *in_buf, size_t in_len, uintptr_t *out_buf, |
| 60 | size_t out_len, uintptr_t work_buf, size_t work_len) |
| 61 | { |
| 62 | z_stream stream; |
| 63 | int zret, ret; |
| 64 | |
| 65 | zalloc_start = work_buf; |
| 66 | zalloc_end = work_buf + work_len; |
| 67 | zalloc_current = zalloc_start; |
| 68 | |
| 69 | stream.next_in = (typeof(stream.next_in))*in_buf; |
| 70 | stream.avail_in = in_len; |
| 71 | stream.next_out = (typeof(stream.next_out))*out_buf; |
| 72 | stream.avail_out = out_len; |
| 73 | stream.zalloc = zcalloc; |
| 74 | stream.zfree = zfree; |
| 75 | stream.opaque = (voidpf)0; |
| 76 | |
| 77 | zret = inflateInit(&stream); |
| 78 | if (zret != Z_OK) { |
| 79 | ERROR("zlib: inflate init failed (ret = %d)\n", zret); |
| 80 | return (zret == Z_MEM_ERROR) ? -ENOMEM : -EIO; |
| 81 | } |
| 82 | |
| 83 | zret = inflate(&stream, Z_NO_FLUSH); |
| 84 | if (zret == Z_STREAM_END) { |
| 85 | ret = 0; |
| 86 | } else { |
| 87 | if (stream.msg) |
| 88 | ERROR("%s\n", stream.msg); |
| 89 | ERROR("zlib: inflate failed (ret = %d)\n", zret); |
| 90 | ret = (zret == Z_MEM_ERROR) ? -ENOMEM : -EIO; |
| 91 | } |
| 92 | |
Sandrine Bailleux | 5754607 | 2018-02-07 10:32:01 +0100 | [diff] [blame] | 93 | VERBOSE("zlib: %lu byte input\n", stream.total_in); |
| 94 | VERBOSE("zlib: %lu byte output\n", stream.total_out); |
Masahiro Yamada | c43d685 | 2018-01-26 11:42:01 +0900 | [diff] [blame] | 95 | |
| 96 | *in_buf = (uintptr_t)stream.next_in; |
| 97 | *out_buf = (uintptr_t)stream.next_out; |
| 98 | |
| 99 | inflateEnd(&stream); |
| 100 | |
| 101 | return ret; |
| 102 | } |