Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 1 | /* Copyright 2008 The Android Open Source Project |
| 2 | */ |
| 3 | |
Mark Salyzyn | a5e161b | 2016-09-29 08:08:05 -0700 | [diff] [blame] | 4 | #define LOG_TAG "Binder" |
| 5 | |
| 6 | #include <errno.h> |
| 7 | #include <fcntl.h> |
Arve Hjønnevåg | 399b6c3 | 2014-01-28 21:25:12 -0800 | [diff] [blame] | 8 | #include <inttypes.h> |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 9 | #include <stdio.h> |
| 10 | #include <stdlib.h> |
Elliott Hughes | 824e30e | 2015-01-29 22:32:32 -0800 | [diff] [blame] | 11 | #include <string.h> |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 12 | #include <sys/mman.h> |
Mark Salyzyn | a5e161b | 2016-09-29 08:08:05 -0700 | [diff] [blame] | 13 | #include <unistd.h> |
| 14 | |
Mark Salyzyn | 7823e12 | 2016-09-29 08:08:05 -0700 | [diff] [blame] | 15 | #include <log/log.h> |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 16 | |
| 17 | #include "binder.h" |
| 18 | |
| 19 | #define MAX_BIO_SIZE (1 << 30) |
| 20 | |
| 21 | #define TRACE 0 |
| 22 | |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 23 | void bio_init_from_txn(struct binder_io *io, struct binder_transaction_data *txn); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 24 | |
| 25 | #if TRACE |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 26 | void hexdump(void *_data, size_t len) |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 27 | { |
| 28 | unsigned char *data = _data; |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 29 | size_t count; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 30 | |
| 31 | for (count = 0; count < len; count++) { |
| 32 | if ((count & 15) == 0) |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 33 | fprintf(stderr,"%04zu:", count); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 34 | fprintf(stderr," %02x %c", *data, |
| 35 | (*data < 32) || (*data > 126) ? '.' : *data); |
| 36 | data++; |
| 37 | if ((count & 15) == 15) |
| 38 | fprintf(stderr,"\n"); |
| 39 | } |
| 40 | if ((count & 15) != 0) |
| 41 | fprintf(stderr,"\n"); |
| 42 | } |
| 43 | |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 44 | void binder_dump_txn(struct binder_transaction_data *txn) |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 45 | { |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 46 | struct flat_binder_object *obj; |
Arve Hjønnevåg | 399b6c3 | 2014-01-28 21:25:12 -0800 | [diff] [blame] | 47 | binder_size_t *offs = (binder_size_t *)(uintptr_t)txn->data.ptr.offsets; |
| 48 | size_t count = txn->offsets_size / sizeof(binder_size_t); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 49 | |
Arve Hjønnevåg | 399b6c3 | 2014-01-28 21:25:12 -0800 | [diff] [blame] | 50 | fprintf(stderr," target %016"PRIx64" cookie %016"PRIx64" code %08x flags %08x\n", |
| 51 | (uint64_t)txn->target.ptr, (uint64_t)txn->cookie, txn->code, txn->flags); |
| 52 | fprintf(stderr," pid %8d uid %8d data %"PRIu64" offs %"PRIu64"\n", |
| 53 | txn->sender_pid, txn->sender_euid, (uint64_t)txn->data_size, (uint64_t)txn->offsets_size); |
| 54 | hexdump((void *)(uintptr_t)txn->data.ptr.buffer, txn->data_size); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 55 | while (count--) { |
Arve Hjønnevåg | 399b6c3 | 2014-01-28 21:25:12 -0800 | [diff] [blame] | 56 | obj = (struct flat_binder_object *) (((char*)(uintptr_t)txn->data.ptr.buffer) + *offs++); |
| 57 | fprintf(stderr," - type %08x flags %08x ptr %016"PRIx64" cookie %016"PRIx64"\n", |
| 58 | obj->type, obj->flags, (uint64_t)obj->binder, (uint64_t)obj->cookie); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 59 | } |
| 60 | } |
| 61 | |
| 62 | #define NAME(n) case n: return #n |
| 63 | const char *cmd_name(uint32_t cmd) |
| 64 | { |
| 65 | switch(cmd) { |
| 66 | NAME(BR_NOOP); |
| 67 | NAME(BR_TRANSACTION_COMPLETE); |
| 68 | NAME(BR_INCREFS); |
| 69 | NAME(BR_ACQUIRE); |
| 70 | NAME(BR_RELEASE); |
| 71 | NAME(BR_DECREFS); |
| 72 | NAME(BR_TRANSACTION); |
| 73 | NAME(BR_REPLY); |
| 74 | NAME(BR_FAILED_REPLY); |
| 75 | NAME(BR_DEAD_REPLY); |
| 76 | NAME(BR_DEAD_BINDER); |
| 77 | default: return "???"; |
| 78 | } |
| 79 | } |
| 80 | #else |
| 81 | #define hexdump(a,b) do{} while (0) |
| 82 | #define binder_dump_txn(txn) do{} while (0) |
| 83 | #endif |
| 84 | |
| 85 | #define BIO_F_SHARED 0x01 /* needs to be buffer freed */ |
| 86 | #define BIO_F_OVERFLOW 0x02 /* ran out of space */ |
| 87 | #define BIO_F_IOERROR 0x04 |
| 88 | #define BIO_F_MALLOCED 0x08 /* needs to be free()'d */ |
| 89 | |
| 90 | struct binder_state |
| 91 | { |
| 92 | int fd; |
| 93 | void *mapped; |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 94 | size_t mapsize; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 95 | }; |
| 96 | |
Martijn Coenen | 69b0515 | 2017-03-21 10:00:38 -0700 | [diff] [blame] | 97 | struct binder_state *binder_open(const char* driver, size_t mapsize) |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 98 | { |
| 99 | struct binder_state *bs; |
Serban Constantinescu | a44542c | 2014-01-30 15:16:45 +0000 | [diff] [blame] | 100 | struct binder_version vers; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 101 | |
| 102 | bs = malloc(sizeof(*bs)); |
| 103 | if (!bs) { |
| 104 | errno = ENOMEM; |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 105 | return NULL; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 106 | } |
| 107 | |
Martijn Coenen | 69b0515 | 2017-03-21 10:00:38 -0700 | [diff] [blame] | 108 | bs->fd = open(driver, O_RDWR | O_CLOEXEC); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 109 | if (bs->fd < 0) { |
Martijn Coenen | 69b0515 | 2017-03-21 10:00:38 -0700 | [diff] [blame] | 110 | fprintf(stderr,"binder: cannot open %s (%s)\n", |
| 111 | driver, strerror(errno)); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 112 | goto fail_open; |
| 113 | } |
| 114 | |
Serban Constantinescu | a44542c | 2014-01-30 15:16:45 +0000 | [diff] [blame] | 115 | if ((ioctl(bs->fd, BINDER_VERSION, &vers) == -1) || |
| 116 | (vers.protocol_version != BINDER_CURRENT_PROTOCOL_VERSION)) { |
Serban Constantinescu | 018cf41 | 2014-02-19 15:34:02 +0000 | [diff] [blame] | 117 | fprintf(stderr, |
| 118 | "binder: kernel driver version (%d) differs from user space version (%d)\n", |
| 119 | vers.protocol_version, BINDER_CURRENT_PROTOCOL_VERSION); |
Serban Constantinescu | a44542c | 2014-01-30 15:16:45 +0000 | [diff] [blame] | 120 | goto fail_open; |
| 121 | } |
| 122 | |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 123 | bs->mapsize = mapsize; |
| 124 | bs->mapped = mmap(NULL, mapsize, PROT_READ, MAP_PRIVATE, bs->fd, 0); |
| 125 | if (bs->mapped == MAP_FAILED) { |
| 126 | fprintf(stderr,"binder: cannot map device (%s)\n", |
| 127 | strerror(errno)); |
| 128 | goto fail_map; |
| 129 | } |
| 130 | |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 131 | return bs; |
| 132 | |
| 133 | fail_map: |
| 134 | close(bs->fd); |
| 135 | fail_open: |
| 136 | free(bs); |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 137 | return NULL; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 138 | } |
| 139 | |
| 140 | void binder_close(struct binder_state *bs) |
| 141 | { |
| 142 | munmap(bs->mapped, bs->mapsize); |
| 143 | close(bs->fd); |
| 144 | free(bs); |
| 145 | } |
| 146 | |
| 147 | int binder_become_context_manager(struct binder_state *bs) |
| 148 | { |
Steven Moreland | 3d79547 | 2019-01-04 17:51:30 -0800 | [diff] [blame^] | 149 | struct flat_binder_object obj; |
| 150 | memset(&obj, 0, sizeof(obj)); |
| 151 | obj.flags = FLAT_BINDER_FLAG_TXN_SECURITY_CTX; |
| 152 | |
| 153 | int result = ioctl(bs->fd, BINDER_SET_CONTEXT_MGR_EXT, &obj); |
| 154 | |
| 155 | // fallback to original method |
| 156 | if (result != 0) { |
| 157 | #ifndef VENDORSERVICEMANAGER |
| 158 | android_errorWriteLog(0x534e4554, "121035042"); |
| 159 | #endif |
| 160 | |
| 161 | result = ioctl(bs->fd, BINDER_SET_CONTEXT_MGR, 0); |
| 162 | } |
| 163 | return result; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 164 | } |
| 165 | |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 166 | int binder_write(struct binder_state *bs, void *data, size_t len) |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 167 | { |
| 168 | struct binder_write_read bwr; |
| 169 | int res; |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 170 | |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 171 | bwr.write_size = len; |
| 172 | bwr.write_consumed = 0; |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 173 | bwr.write_buffer = (uintptr_t) data; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 174 | bwr.read_size = 0; |
| 175 | bwr.read_consumed = 0; |
| 176 | bwr.read_buffer = 0; |
| 177 | res = ioctl(bs->fd, BINDER_WRITE_READ, &bwr); |
| 178 | if (res < 0) { |
| 179 | fprintf(stderr,"binder_write: ioctl failed (%s)\n", |
| 180 | strerror(errno)); |
| 181 | } |
| 182 | return res; |
| 183 | } |
| 184 | |
dcashman | 51f592c | 2016-03-11 10:38:10 -0800 | [diff] [blame] | 185 | void binder_free_buffer(struct binder_state *bs, |
| 186 | binder_uintptr_t buffer_to_free) |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 187 | { |
| 188 | struct { |
| 189 | uint32_t cmd_free; |
Arve Hjønnevåg | 399b6c3 | 2014-01-28 21:25:12 -0800 | [diff] [blame] | 190 | binder_uintptr_t buffer; |
dcashman | 51f592c | 2016-03-11 10:38:10 -0800 | [diff] [blame] | 191 | } __attribute__((packed)) data; |
| 192 | data.cmd_free = BC_FREE_BUFFER; |
| 193 | data.buffer = buffer_to_free; |
| 194 | binder_write(bs, &data, sizeof(data)); |
| 195 | } |
| 196 | |
| 197 | void binder_send_reply(struct binder_state *bs, |
| 198 | struct binder_io *reply, |
Mark Salyzyn | 52aa4a7 | 2016-05-25 13:14:10 -0700 | [diff] [blame] | 199 | binder_uintptr_t buffer_to_free, |
dcashman | 51f592c | 2016-03-11 10:38:10 -0800 | [diff] [blame] | 200 | int status) |
| 201 | { |
| 202 | struct { |
Mark Salyzyn | 52aa4a7 | 2016-05-25 13:14:10 -0700 | [diff] [blame] | 203 | uint32_t cmd_free; |
| 204 | binder_uintptr_t buffer; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 205 | uint32_t cmd_reply; |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 206 | struct binder_transaction_data txn; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 207 | } __attribute__((packed)) data; |
| 208 | |
Mark Salyzyn | 52aa4a7 | 2016-05-25 13:14:10 -0700 | [diff] [blame] | 209 | data.cmd_free = BC_FREE_BUFFER; |
| 210 | data.buffer = buffer_to_free; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 211 | data.cmd_reply = BC_REPLY; |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 212 | data.txn.target.ptr = 0; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 213 | data.txn.cookie = 0; |
| 214 | data.txn.code = 0; |
| 215 | if (status) { |
| 216 | data.txn.flags = TF_STATUS_CODE; |
| 217 | data.txn.data_size = sizeof(int); |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 218 | data.txn.offsets_size = 0; |
Arve Hjønnevåg | 399b6c3 | 2014-01-28 21:25:12 -0800 | [diff] [blame] | 219 | data.txn.data.ptr.buffer = (uintptr_t)&status; |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 220 | data.txn.data.ptr.offsets = 0; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 221 | } else { |
| 222 | data.txn.flags = 0; |
| 223 | data.txn.data_size = reply->data - reply->data0; |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 224 | data.txn.offsets_size = ((char*) reply->offs) - ((char*) reply->offs0); |
Arve Hjønnevåg | 399b6c3 | 2014-01-28 21:25:12 -0800 | [diff] [blame] | 225 | data.txn.data.ptr.buffer = (uintptr_t)reply->data0; |
| 226 | data.txn.data.ptr.offsets = (uintptr_t)reply->offs0; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 227 | } |
| 228 | binder_write(bs, &data, sizeof(data)); |
| 229 | } |
| 230 | |
| 231 | int binder_parse(struct binder_state *bs, struct binder_io *bio, |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 232 | uintptr_t ptr, size_t size, binder_handler func) |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 233 | { |
| 234 | int r = 1; |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 235 | uintptr_t end = ptr + (uintptr_t) size; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 236 | |
| 237 | while (ptr < end) { |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 238 | uint32_t cmd = *(uint32_t *) ptr; |
| 239 | ptr += sizeof(uint32_t); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 240 | #if TRACE |
| 241 | fprintf(stderr,"%s:\n", cmd_name(cmd)); |
| 242 | #endif |
| 243 | switch(cmd) { |
| 244 | case BR_NOOP: |
| 245 | break; |
| 246 | case BR_TRANSACTION_COMPLETE: |
| 247 | break; |
| 248 | case BR_INCREFS: |
| 249 | case BR_ACQUIRE: |
| 250 | case BR_RELEASE: |
| 251 | case BR_DECREFS: |
| 252 | #if TRACE |
Arve Hjønnevåg | 399b6c3 | 2014-01-28 21:25:12 -0800 | [diff] [blame] | 253 | fprintf(stderr," %p, %p\n", (void *)ptr, (void *)(ptr + sizeof(void *))); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 254 | #endif |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 255 | ptr += sizeof(struct binder_ptr_cookie); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 256 | break; |
Steven Moreland | 3d79547 | 2019-01-04 17:51:30 -0800 | [diff] [blame^] | 257 | case BR_TRANSACTION_SEC_CTX: |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 258 | case BR_TRANSACTION: { |
Steven Moreland | 3d79547 | 2019-01-04 17:51:30 -0800 | [diff] [blame^] | 259 | struct binder_transaction_data_secctx txn; |
| 260 | if (cmd == BR_TRANSACTION_SEC_CTX) { |
| 261 | if ((end - ptr) < sizeof(struct binder_transaction_data_secctx)) { |
| 262 | ALOGE("parse: txn too small (binder_transaction_data_secctx)!\n"); |
| 263 | return -1; |
| 264 | } |
| 265 | memcpy(&txn, (void*) ptr, sizeof(struct binder_transaction_data_secctx)); |
| 266 | ptr += sizeof(struct binder_transaction_data_secctx); |
| 267 | } else /* BR_TRANSACTION */ { |
| 268 | if ((end - ptr) < sizeof(struct binder_transaction_data)) { |
| 269 | ALOGE("parse: txn too small (binder_transaction_data)!\n"); |
| 270 | return -1; |
| 271 | } |
| 272 | memcpy(&txn.transaction_data, (void*) ptr, sizeof(struct binder_transaction_data)); |
| 273 | ptr += sizeof(struct binder_transaction_data); |
| 274 | |
| 275 | txn.secctx = 0; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 276 | } |
Steven Moreland | 3d79547 | 2019-01-04 17:51:30 -0800 | [diff] [blame^] | 277 | |
| 278 | binder_dump_txn(&txn.transaction_data); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 279 | if (func) { |
| 280 | unsigned rdata[256/4]; |
| 281 | struct binder_io msg; |
| 282 | struct binder_io reply; |
| 283 | int res; |
| 284 | |
| 285 | bio_init(&reply, rdata, sizeof(rdata), 4); |
Steven Moreland | 3d79547 | 2019-01-04 17:51:30 -0800 | [diff] [blame^] | 286 | bio_init_from_txn(&msg, &txn.transaction_data); |
| 287 | res = func(bs, &txn, &msg, &reply); |
| 288 | if (txn.transaction_data.flags & TF_ONE_WAY) { |
| 289 | binder_free_buffer(bs, txn.transaction_data.data.ptr.buffer); |
Mark Salyzyn | 52aa4a7 | 2016-05-25 13:14:10 -0700 | [diff] [blame] | 290 | } else { |
Steven Moreland | 3d79547 | 2019-01-04 17:51:30 -0800 | [diff] [blame^] | 291 | binder_send_reply(bs, &reply, txn.transaction_data.data.ptr.buffer, res); |
Mark Salyzyn | 52aa4a7 | 2016-05-25 13:14:10 -0700 | [diff] [blame] | 292 | } |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 293 | } |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 294 | break; |
| 295 | } |
| 296 | case BR_REPLY: { |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 297 | struct binder_transaction_data *txn = (struct binder_transaction_data *) ptr; |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 298 | if ((end - ptr) < sizeof(*txn)) { |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 299 | ALOGE("parse: reply too small!\n"); |
| 300 | return -1; |
| 301 | } |
| 302 | binder_dump_txn(txn); |
| 303 | if (bio) { |
| 304 | bio_init_from_txn(bio, txn); |
| 305 | bio = 0; |
| 306 | } else { |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 307 | /* todo FREE BUFFER */ |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 308 | } |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 309 | ptr += sizeof(*txn); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 310 | r = 0; |
| 311 | break; |
| 312 | } |
| 313 | case BR_DEAD_BINDER: { |
Arve Hjønnevåg | 399b6c3 | 2014-01-28 21:25:12 -0800 | [diff] [blame] | 314 | struct binder_death *death = (struct binder_death *)(uintptr_t) *(binder_uintptr_t *)ptr; |
| 315 | ptr += sizeof(binder_uintptr_t); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 316 | death->func(bs, death->ptr); |
| 317 | break; |
| 318 | } |
| 319 | case BR_FAILED_REPLY: |
| 320 | r = -1; |
| 321 | break; |
| 322 | case BR_DEAD_REPLY: |
| 323 | r = -1; |
| 324 | break; |
| 325 | default: |
| 326 | ALOGE("parse: OOPS %d\n", cmd); |
| 327 | return -1; |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | return r; |
| 332 | } |
| 333 | |
Serban Constantinescu | 5fb1b88 | 2014-01-30 14:07:34 +0000 | [diff] [blame] | 334 | void binder_acquire(struct binder_state *bs, uint32_t target) |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 335 | { |
| 336 | uint32_t cmd[2]; |
| 337 | cmd[0] = BC_ACQUIRE; |
Serban Constantinescu | 5fb1b88 | 2014-01-30 14:07:34 +0000 | [diff] [blame] | 338 | cmd[1] = target; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 339 | binder_write(bs, cmd, sizeof(cmd)); |
| 340 | } |
| 341 | |
Serban Constantinescu | 5fb1b88 | 2014-01-30 14:07:34 +0000 | [diff] [blame] | 342 | void binder_release(struct binder_state *bs, uint32_t target) |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 343 | { |
| 344 | uint32_t cmd[2]; |
| 345 | cmd[0] = BC_RELEASE; |
Serban Constantinescu | 5fb1b88 | 2014-01-30 14:07:34 +0000 | [diff] [blame] | 346 | cmd[1] = target; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 347 | binder_write(bs, cmd, sizeof(cmd)); |
| 348 | } |
| 349 | |
Serban Constantinescu | 5fb1b88 | 2014-01-30 14:07:34 +0000 | [diff] [blame] | 350 | void binder_link_to_death(struct binder_state *bs, uint32_t target, struct binder_death *death) |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 351 | { |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 352 | struct { |
| 353 | uint32_t cmd; |
| 354 | struct binder_handle_cookie payload; |
| 355 | } __attribute__((packed)) data; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 356 | |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 357 | data.cmd = BC_REQUEST_DEATH_NOTIFICATION; |
| 358 | data.payload.handle = target; |
| 359 | data.payload.cookie = (uintptr_t) death; |
| 360 | binder_write(bs, &data, sizeof(data)); |
| 361 | } |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 362 | |
| 363 | int binder_call(struct binder_state *bs, |
| 364 | struct binder_io *msg, struct binder_io *reply, |
Serban Constantinescu | 5fb1b88 | 2014-01-30 14:07:34 +0000 | [diff] [blame] | 365 | uint32_t target, uint32_t code) |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 366 | { |
| 367 | int res; |
| 368 | struct binder_write_read bwr; |
| 369 | struct { |
| 370 | uint32_t cmd; |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 371 | struct binder_transaction_data txn; |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 372 | } __attribute__((packed)) writebuf; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 373 | unsigned readbuf[32]; |
| 374 | |
| 375 | if (msg->flags & BIO_F_OVERFLOW) { |
| 376 | fprintf(stderr,"binder: txn buffer overflow\n"); |
| 377 | goto fail; |
| 378 | } |
| 379 | |
| 380 | writebuf.cmd = BC_TRANSACTION; |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 381 | writebuf.txn.target.handle = target; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 382 | writebuf.txn.code = code; |
| 383 | writebuf.txn.flags = 0; |
| 384 | writebuf.txn.data_size = msg->data - msg->data0; |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 385 | writebuf.txn.offsets_size = ((char*) msg->offs) - ((char*) msg->offs0); |
Arve Hjønnevåg | 399b6c3 | 2014-01-28 21:25:12 -0800 | [diff] [blame] | 386 | writebuf.txn.data.ptr.buffer = (uintptr_t)msg->data0; |
| 387 | writebuf.txn.data.ptr.offsets = (uintptr_t)msg->offs0; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 388 | |
| 389 | bwr.write_size = sizeof(writebuf); |
| 390 | bwr.write_consumed = 0; |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 391 | bwr.write_buffer = (uintptr_t) &writebuf; |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 392 | |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 393 | hexdump(msg->data0, msg->data - msg->data0); |
| 394 | for (;;) { |
| 395 | bwr.read_size = sizeof(readbuf); |
| 396 | bwr.read_consumed = 0; |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 397 | bwr.read_buffer = (uintptr_t) readbuf; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 398 | |
| 399 | res = ioctl(bs->fd, BINDER_WRITE_READ, &bwr); |
| 400 | |
| 401 | if (res < 0) { |
| 402 | fprintf(stderr,"binder: ioctl failed (%s)\n", strerror(errno)); |
| 403 | goto fail; |
| 404 | } |
| 405 | |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 406 | res = binder_parse(bs, reply, (uintptr_t) readbuf, bwr.read_consumed, 0); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 407 | if (res == 0) return 0; |
| 408 | if (res < 0) goto fail; |
| 409 | } |
| 410 | |
| 411 | fail: |
| 412 | memset(reply, 0, sizeof(*reply)); |
| 413 | reply->flags |= BIO_F_IOERROR; |
| 414 | return -1; |
| 415 | } |
| 416 | |
| 417 | void binder_loop(struct binder_state *bs, binder_handler func) |
| 418 | { |
| 419 | int res; |
| 420 | struct binder_write_read bwr; |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 421 | uint32_t readbuf[32]; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 422 | |
| 423 | bwr.write_size = 0; |
| 424 | bwr.write_consumed = 0; |
| 425 | bwr.write_buffer = 0; |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 426 | |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 427 | readbuf[0] = BC_ENTER_LOOPER; |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 428 | binder_write(bs, readbuf, sizeof(uint32_t)); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 429 | |
| 430 | for (;;) { |
| 431 | bwr.read_size = sizeof(readbuf); |
| 432 | bwr.read_consumed = 0; |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 433 | bwr.read_buffer = (uintptr_t) readbuf; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 434 | |
| 435 | res = ioctl(bs->fd, BINDER_WRITE_READ, &bwr); |
| 436 | |
| 437 | if (res < 0) { |
| 438 | ALOGE("binder_loop: ioctl failed (%s)\n", strerror(errno)); |
| 439 | break; |
| 440 | } |
| 441 | |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 442 | res = binder_parse(bs, 0, (uintptr_t) readbuf, bwr.read_consumed, func); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 443 | if (res == 0) { |
| 444 | ALOGE("binder_loop: unexpected reply?!\n"); |
| 445 | break; |
| 446 | } |
| 447 | if (res < 0) { |
| 448 | ALOGE("binder_loop: io error %d %s\n", res, strerror(errno)); |
| 449 | break; |
| 450 | } |
| 451 | } |
| 452 | } |
| 453 | |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 454 | void bio_init_from_txn(struct binder_io *bio, struct binder_transaction_data *txn) |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 455 | { |
Arve Hjønnevåg | 399b6c3 | 2014-01-28 21:25:12 -0800 | [diff] [blame] | 456 | bio->data = bio->data0 = (char *)(intptr_t)txn->data.ptr.buffer; |
| 457 | bio->offs = bio->offs0 = (binder_size_t *)(intptr_t)txn->data.ptr.offsets; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 458 | bio->data_avail = txn->data_size; |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 459 | bio->offs_avail = txn->offsets_size / sizeof(size_t); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 460 | bio->flags = BIO_F_SHARED; |
| 461 | } |
| 462 | |
| 463 | void bio_init(struct binder_io *bio, void *data, |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 464 | size_t maxdata, size_t maxoffs) |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 465 | { |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 466 | size_t n = maxoffs * sizeof(size_t); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 467 | |
| 468 | if (n > maxdata) { |
| 469 | bio->flags = BIO_F_OVERFLOW; |
| 470 | bio->data_avail = 0; |
| 471 | bio->offs_avail = 0; |
| 472 | return; |
| 473 | } |
| 474 | |
| 475 | bio->data = bio->data0 = (char *) data + n; |
| 476 | bio->offs = bio->offs0 = data; |
| 477 | bio->data_avail = maxdata - n; |
| 478 | bio->offs_avail = maxoffs; |
| 479 | bio->flags = 0; |
| 480 | } |
| 481 | |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 482 | static void *bio_alloc(struct binder_io *bio, size_t size) |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 483 | { |
| 484 | size = (size + 3) & (~3); |
| 485 | if (size > bio->data_avail) { |
| 486 | bio->flags |= BIO_F_OVERFLOW; |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 487 | return NULL; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 488 | } else { |
| 489 | void *ptr = bio->data; |
| 490 | bio->data += size; |
| 491 | bio->data_avail -= size; |
| 492 | return ptr; |
| 493 | } |
| 494 | } |
| 495 | |
| 496 | void binder_done(struct binder_state *bs, |
Ian Pedowitz | d57d9b9 | 2016-02-19 08:34:43 +0000 | [diff] [blame] | 497 | __unused struct binder_io *msg, |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 498 | struct binder_io *reply) |
| 499 | { |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 500 | struct { |
| 501 | uint32_t cmd; |
| 502 | uintptr_t buffer; |
| 503 | } __attribute__((packed)) data; |
| 504 | |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 505 | if (reply->flags & BIO_F_SHARED) { |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 506 | data.cmd = BC_FREE_BUFFER; |
| 507 | data.buffer = (uintptr_t) reply->data0; |
| 508 | binder_write(bs, &data, sizeof(data)); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 509 | reply->flags = 0; |
| 510 | } |
| 511 | } |
| 512 | |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 513 | static struct flat_binder_object *bio_alloc_obj(struct binder_io *bio) |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 514 | { |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 515 | struct flat_binder_object *obj; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 516 | |
| 517 | obj = bio_alloc(bio, sizeof(*obj)); |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 518 | |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 519 | if (obj && bio->offs_avail) { |
| 520 | bio->offs_avail--; |
| 521 | *bio->offs++ = ((char*) obj) - ((char*) bio->data0); |
| 522 | return obj; |
| 523 | } |
| 524 | |
| 525 | bio->flags |= BIO_F_OVERFLOW; |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 526 | return NULL; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 527 | } |
| 528 | |
| 529 | void bio_put_uint32(struct binder_io *bio, uint32_t n) |
| 530 | { |
| 531 | uint32_t *ptr = bio_alloc(bio, sizeof(n)); |
| 532 | if (ptr) |
| 533 | *ptr = n; |
| 534 | } |
| 535 | |
| 536 | void bio_put_obj(struct binder_io *bio, void *ptr) |
| 537 | { |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 538 | struct flat_binder_object *obj; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 539 | |
| 540 | obj = bio_alloc_obj(bio); |
| 541 | if (!obj) |
| 542 | return; |
| 543 | |
| 544 | obj->flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; |
Christopher Ferris | dbaa22a | 2017-07-27 10:38:45 -0700 | [diff] [blame] | 545 | obj->hdr.type = BINDER_TYPE_BINDER; |
Arve Hjønnevåg | 399b6c3 | 2014-01-28 21:25:12 -0800 | [diff] [blame] | 546 | obj->binder = (uintptr_t)ptr; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 547 | obj->cookie = 0; |
| 548 | } |
| 549 | |
Serban Constantinescu | 5fb1b88 | 2014-01-30 14:07:34 +0000 | [diff] [blame] | 550 | void bio_put_ref(struct binder_io *bio, uint32_t handle) |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 551 | { |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 552 | struct flat_binder_object *obj; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 553 | |
Serban Constantinescu | 5fb1b88 | 2014-01-30 14:07:34 +0000 | [diff] [blame] | 554 | if (handle) |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 555 | obj = bio_alloc_obj(bio); |
| 556 | else |
| 557 | obj = bio_alloc(bio, sizeof(*obj)); |
| 558 | |
| 559 | if (!obj) |
| 560 | return; |
| 561 | |
| 562 | obj->flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; |
Christopher Ferris | dbaa22a | 2017-07-27 10:38:45 -0700 | [diff] [blame] | 563 | obj->hdr.type = BINDER_TYPE_HANDLE; |
Serban Constantinescu | 5fb1b88 | 2014-01-30 14:07:34 +0000 | [diff] [blame] | 564 | obj->handle = handle; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 565 | obj->cookie = 0; |
| 566 | } |
| 567 | |
| 568 | void bio_put_string16(struct binder_io *bio, const uint16_t *str) |
| 569 | { |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 570 | size_t len; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 571 | uint16_t *ptr; |
| 572 | |
| 573 | if (!str) { |
| 574 | bio_put_uint32(bio, 0xffffffff); |
| 575 | return; |
| 576 | } |
| 577 | |
| 578 | len = 0; |
| 579 | while (str[len]) len++; |
| 580 | |
| 581 | if (len >= (MAX_BIO_SIZE / sizeof(uint16_t))) { |
| 582 | bio_put_uint32(bio, 0xffffffff); |
| 583 | return; |
| 584 | } |
| 585 | |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 586 | /* Note: The payload will carry 32bit size instead of size_t */ |
| 587 | bio_put_uint32(bio, (uint32_t) len); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 588 | len = (len + 1) * sizeof(uint16_t); |
| 589 | ptr = bio_alloc(bio, len); |
| 590 | if (ptr) |
| 591 | memcpy(ptr, str, len); |
| 592 | } |
| 593 | |
| 594 | void bio_put_string16_x(struct binder_io *bio, const char *_str) |
| 595 | { |
| 596 | unsigned char *str = (unsigned char*) _str; |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 597 | size_t len; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 598 | uint16_t *ptr; |
| 599 | |
| 600 | if (!str) { |
| 601 | bio_put_uint32(bio, 0xffffffff); |
| 602 | return; |
| 603 | } |
| 604 | |
| 605 | len = strlen(_str); |
| 606 | |
| 607 | if (len >= (MAX_BIO_SIZE / sizeof(uint16_t))) { |
| 608 | bio_put_uint32(bio, 0xffffffff); |
| 609 | return; |
| 610 | } |
| 611 | |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 612 | /* Note: The payload will carry 32bit size instead of size_t */ |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 613 | bio_put_uint32(bio, len); |
| 614 | ptr = bio_alloc(bio, (len + 1) * sizeof(uint16_t)); |
| 615 | if (!ptr) |
| 616 | return; |
| 617 | |
| 618 | while (*str) |
| 619 | *ptr++ = *str++; |
| 620 | *ptr++ = 0; |
| 621 | } |
| 622 | |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 623 | static void *bio_get(struct binder_io *bio, size_t size) |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 624 | { |
| 625 | size = (size + 3) & (~3); |
| 626 | |
| 627 | if (bio->data_avail < size){ |
| 628 | bio->data_avail = 0; |
| 629 | bio->flags |= BIO_F_OVERFLOW; |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 630 | return NULL; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 631 | } else { |
| 632 | void *ptr = bio->data; |
| 633 | bio->data += size; |
| 634 | bio->data_avail -= size; |
| 635 | return ptr; |
| 636 | } |
| 637 | } |
| 638 | |
| 639 | uint32_t bio_get_uint32(struct binder_io *bio) |
| 640 | { |
| 641 | uint32_t *ptr = bio_get(bio, sizeof(*ptr)); |
| 642 | return ptr ? *ptr : 0; |
| 643 | } |
| 644 | |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 645 | uint16_t *bio_get_string16(struct binder_io *bio, size_t *sz) |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 646 | { |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 647 | size_t len; |
| 648 | |
| 649 | /* Note: The payload will carry 32bit size instead of size_t */ |
| 650 | len = (size_t) bio_get_uint32(bio); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 651 | if (sz) |
| 652 | *sz = len; |
| 653 | return bio_get(bio, (len + 1) * sizeof(uint16_t)); |
| 654 | } |
| 655 | |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 656 | static struct flat_binder_object *_bio_get_obj(struct binder_io *bio) |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 657 | { |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 658 | size_t n; |
| 659 | size_t off = bio->data - bio->data0; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 660 | |
Serban Constantinescu | 3a345f0 | 2013-12-19 09:11:41 +0000 | [diff] [blame] | 661 | /* TODO: be smarter about this? */ |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 662 | for (n = 0; n < bio->offs_avail; n++) { |
| 663 | if (bio->offs[n] == off) |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 664 | return bio_get(bio, sizeof(struct flat_binder_object)); |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 665 | } |
| 666 | |
| 667 | bio->data_avail = 0; |
| 668 | bio->flags |= BIO_F_OVERFLOW; |
Serban Constantinescu | 9b738bb | 2014-01-10 15:48:29 +0000 | [diff] [blame] | 669 | return NULL; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 670 | } |
| 671 | |
Serban Constantinescu | 5fb1b88 | 2014-01-30 14:07:34 +0000 | [diff] [blame] | 672 | uint32_t bio_get_ref(struct binder_io *bio) |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 673 | { |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 674 | struct flat_binder_object *obj; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 675 | |
| 676 | obj = _bio_get_obj(bio); |
| 677 | if (!obj) |
| 678 | return 0; |
| 679 | |
Christopher Ferris | dbaa22a | 2017-07-27 10:38:45 -0700 | [diff] [blame] | 680 | if (obj->hdr.type == BINDER_TYPE_HANDLE) |
Serban Constantinescu | bcf3888 | 2014-01-10 13:56:27 +0000 | [diff] [blame] | 681 | return obj->handle; |
Mike Lockwood | 94afecf | 2012-10-24 10:45:23 -0700 | [diff] [blame] | 682 | |
| 683 | return 0; |
| 684 | } |