Commit graph

3469 commits

Author SHA1 Message Date
Jiang Jiang Jian
3452845063 Merge branch 'bugfix/btdm_avrc_connect_state_evt' into 'master'
Bugfix/btdm avrc connect state evt

See merge request !1717
2018-01-09 19:33:06 +08:00
Jiang Jiang Jian
6daa52d2ca Merge branch 'bugfix/update_bt_lib_with_updated_toolchain_for_master' into 'master'
component/bt: build libbtdm_app.a with updated toolchain

See merge request !1728
2018-01-09 16:55:45 +08:00
wangmengyang
e07b43e924 component/bt: add AVRC event for remote features indication
1. remove the feature mask parameter from AVRC connection state event, as the AVCTP connection can be initiated by remote device before service discovery to remote device is performed. \
In this case, AVRCP connection state event may not be reported after connection initated by remote device is established.
2. remove ESP_AVRC_CT_MAX_EVT
3. add more documentations to AVRC APIs
2018-01-09 16:33:48 +08:00
Jack
11c0daef62 Fix bug that when we do full calibration init data bin is not used 2018-01-09 15:31:34 +08:00
Jiang Jiang Jian
ff726b4c79 Merge branch 'bugfix/btdm_fix_cant_remove_boned_device_if_its_connected' into 'master'
Component/bt: fix can not remove boned device if it is connected

See merge request !1758
2018-01-09 11:42:45 +08:00
Jiang Jiang Jian
c147d7b03e Merge branch 'feature/btdm_bt_spp' into 'master'
component/bt: Add bt spp profile

See merge request !1593
2018-01-09 10:44:46 +08:00
Ivan Grokhotkov
8e8cb1a139 panic: prevent INT WDT from re-triggering in OCD mode
When INT WDT fires, panicHandler is invoked. In OCD mode, panicHandler
sets a breakpoint on the PC from the exception frame and returns.
However in case of INT WDT, interrupt flag is still set in TIMERG1
peripheral, which causes INT WDT to trigger again. This causes an
endless stream of "Core  0 panic'ed (Interrupt wdt timeout on CPU1)"
messages. OpenOCD also gets terribly confused at this point.

Disable watchdogs when exiting panic handler in OCD mode.
Clear TIMERG1 WDT interrupt flag to prevent re-entry into panic handler.
2018-01-09 01:46:24 +08:00
Ivan Grokhotkov
7c584e80b0 soc/rtc_clk: fix loss of precision in estimation of XTAL frequency
RTC_FAST_CLK_FREQ_APPROX is defined as 8500000, so 0.5MHz part was lost
when dividing by MHZ. Since cal_val is 64-bit the parens can be removed.

With 40MHz XTAL for a nominal ESP32 chip, this fixes estimated XTAL
frequency from 38 to 40MHz.
2018-01-08 23:31:21 +08:00
Ivan Grokhotkov
dba291416f soc,ulp: add register definitions of RTC_I2C peripheral 2018-01-08 21:28:14 +08:00
Jiang Jiang Jian
0cd97cecb2 Merge branch 'bugfix/btdm_error_when_add_device_to_whitelist_twice' into 'master'
component/bt: Fix bug when add device to whitelist twice

See merge request !1700
2018-01-08 19:16:34 +08:00
zhiweijian
831b2c0441 Component/bt: fix can not remove boned device if it is connected 2018-01-08 17:55:00 +08:00
Ivan Grokhotkov
f61dcf4d1a Merge branch 'bugfix/freertos_eventgroup_isr_test' into 'master'
freertos/Fix Event Group ISR test case

See merge request !1733
2018-01-08 16:51:27 +08:00
Ivan Grokhotkov
ddf3d92a25 Merge branch 'bugfix/esp_log_local_level' into 'master'
Log: fix definition of LOG_LOCAL_LEVEL, fix typos

See merge request !1747
2018-01-08 16:41:42 +08:00
Angus Gratton
da1bf60904 esptool: Update to v2.2 2018-01-08 11:45:09 +11:00
Angus Gratton
f9ad17eee4 Merge branch 'bugfix/BLE_SM_Security_Flags_pr1320' into 'master'
bt: Fix ble sm security flags (Github PR 1320)

See merge request !1740
2018-01-08 07:35:19 +08:00
Jiang Jiang Jian
a1b59679f9 Merge branch 'bugfix/btdm_standardize_code' into 'master'
component/bt: Standardize code

See merge request !1696
2018-01-05 18:56:08 +08:00
baohongde
d2663c866e component/bt: Add SPP profile 2018-01-05 16:48:29 +08:00
Jiang Jiang Jian
4d4c055a1a Merge branch 'bugfix/recompile_with_new_psram_toolchain' into 'master'
recompile wifi lib with new toolchain 1.22.0-78-g4b87650

See merge request !1730
2018-01-05 16:40:30 +08:00
Ivan Grokhotkov
3a6962b8ec log: fix typos in header files 2018-01-05 16:10:58 +08:00
Ivan Grokhotkov
6a5c105753 log: define LOG_LOCAL_LEVEL before using it, don't use type cast
LOG_LOCAL_LEVEL is now used in a construct like:
 #if (LOG_LOCAL_LEVEL >= ESP_LOG_INFO)
Make sure that LOG_LOCAL_LEVEL is defined, and don't use a type cast in
its definition, because preprocessor can not parse that.
2018-01-05 16:10:58 +08:00
Angus Gratton
2227c44254 rmt: Add void * argument for end-of-transmission callback
Ref https://github.com/espressif/esp-idf/pull/1174
2018-01-05 17:31:59 +11:00
Krzysztof Bociurko
1066c74b74 rmt: Adds a simple handler that can be called when transmission ends.
Merges https://github.com/espressif/esp-idf/pull/1174
2018-01-05 17:14:02 +11:00
Ivan Grokhotkov
30aacb79d5 Merge branch 'bugfix/uart_semaphore_pr1387' into 'master'
uart driver: Remove unnecessary xSemaphoreGive()

See merge request !1739
2018-01-05 11:05:05 +08:00
Angus Gratton
eb659e401d Merge branch 'feature/esp_intr_set_in_iram' into 'master'
Add esp_intr_set_in_iram (Github PR)

See merge request !1629
2018-01-04 06:04:05 +08:00
Angus Gratton
6e23ee704b Merge branch 'refactor/spi_clk_pre_cal' into 'master'
bugfix(spi_master): improve spi time cost for each transfer.

See merge request !1670
2018-01-04 06:03:12 +08:00
Tim Cook
2b24177d2b n btm_sec_save_le_key() set BTM_SEC_LE_LINK_KEY_KNOWN (and BTM_SEC_LE_LINK_KEY_AUTHED if MITM was used) when process a local Long Term Key (key type BTM_LE_KEY_LENC). This is because these flags share bits with the BTM_SEC_FLAG_LKEY_KNOWN (and BTM_SEC_FLAG_LKEY_AUTHED) flag in btm_api.h. Without this code a link that is encrypted via SM pairing where only the local device exchanges the LTK (peer does not send its LTK) will not allow GATT operations that require encryption (request will be incorrectly rejected with insufficient authentication reason, regardless of if MITM is required).
Merges https://github.com/espressif/esp-idf/pull/1320
2018-01-03 14:14:24 +11:00
Tim Cook
5b87177831 set ble_rsp_key member of structure bte_appl_cfg in function bta_dm_co_ble_set_rsp_key_req (function incorrectly uses ble_init_key member).
Merges https://github.com/espressif/esp-idf/pull/1320
2018-01-03 14:14:24 +11:00
Alexey Morozov
25b8642835 uart driver: Remove unnecessary xSemaphoreGive()
avoid unnecessary call of xSemaphoreGive(p_uart_obj[uart_num]->tx_mux);

Merges https://github.com/espressif/esp-idf/pull/1387
2018-01-03 13:44:19 +11:00
baohongde
2530e0aeb9 component/bt: Standardize code
Reported from github:
https://github.com/espressif/esp-idf/issues/1402
https://github.com/espressif/esp-idf/issues/1403
2018-01-03 10:31:30 +08:00
JoveToo
6746d31620 fix typo
Merges https://github.com/espressif/esp-idf/pull/1430
2018-01-03 10:50:50 +11:00
Per Malmberg
f7f52414ec Removed logging in RMT driver which skews the timing. Issue #1345
Merges https://github.com/espressif/esp-idf/pull/1450
2018-01-03 10:50:03 +11:00
Darian Leung
9df9e2363e freertos/Fix Event Group ISR test case
This commit fixes and reimplements the Event Group ISR test case. The test
case tests xEventGroupSetBitsFromISR() and xEventGroupClearBitsFromISR()
2018-01-02 18:57:28 +08:00
baohongde
e55b5433aa component/bt: Fix bug when add device to whitelist twice 2018-01-02 17:20:34 +08:00
Jiang Jiang Jian
c401a74bfb Merge branch 'bugfix/btdm_aes_encrypt_workaround' into 'master'
component/bt: disable Secure Connections to workaround AES encryption issue

See merge request !1719
2018-01-02 16:15:39 +08:00
XiaXiaotian
3fd421ab01 recompile wifi lib with new toolchain 1.22.0-78-g4b87650 2018-01-02 14:23:37 +08:00
Angus Gratton
b16e1d84d0 AWS IoT SDK: Update version from v2.1.1 to v2.2.1
Closes https://github.com/espressif/esp-idf/issues/1355
2018-01-02 13:46:58 +11:00
Angus Gratton
e798957d16 Merge branch 'bugfix/ci_log_examples' into 'master'
Fix a sporadic bug in building of the examples

See merge request !1723
2018-01-02 07:55:26 +08:00
wangmengyang
ba06683834 component/bt: build libbtdm_app.a with updated toolchain 2017-12-29 15:31:11 +08:00
Ivan Grokhotkov
f82048018b Merge branch 'bugfix/i2c_regression' into 'master'
Bugfix/i2c regression (Github PR 1443)

See merge request !1725
2017-12-29 15:19:38 +08:00
Per Malmberg
f2370b2830 Removed logging from pthread conditional variable which completely drowned out any other logging and also had negative effects on the RMT due to sharing the same log system. Related to #1345 / TW#16842 2017-12-28 15:21:00 +01:00
Per Malmberg
5fb16d9b2b Fix regression in i2c_master_read() which rejected all data lenths. 2017-12-28 14:54:15 +01:00
Anton Maklakov
301751ede0 build system: Fix undefined variables
make/project.mk:315: warning: undefined variable `CC'
    make/project.mk:316: warning: undefined variable `LD'
    make/project.mk:317: warning: undefined variable `AR'
    make/project.mk:62: warning: undefined variable `MAKECMDGOALS'
    components/partition_table/Makefile.projbuild:24: warning: undefined variable `quote'
    components/bootloader/Makefile.projbuild:123: warning: undefined variable 'BOOTLOADER_DIGEST_BIN'
    components/bootloader/Makefile.projbuild:123: warning: undefined variable 'SECURE_BOOTLOADER_KEY'
2017-12-28 19:21:34 +08:00
Ivan Grokhotkov
98dff491c8 Merge branch 'bugfix/static_mem_workaround' into 'master'
esp32: Change 192KB runtime static limit workaround to a 176KB link time workaround

See merge request !1704
2017-12-28 18:52:47 +08:00
wangmengyang
1bbd67f7d7 component/bt: disable Secure Connections(Host Supported) of classic Bluetooth to workaround AES encryption issue in controller
1. ESP32 is found to suffer from AES encryption start/resume failure with specific device. Therefore temporarily disable BR/EDR Secure Connections for a workaround
2. BR/EDR Secure Connections is a feature for BT Classic introduced in Bluetooth 4.1. This change disables the setting of Secure Connections(Host Supported), and will result in the use of legacy authentication instead of secure authentication, and E0 encryption(legacy) instead of AES-CCM encryption. BLE security procedures are not affected.
2017-12-28 14:51:19 +08:00
michael
2552fdccd1 chore(spi): add log to show native pins or not when configure pins. 2017-12-28 12:03:29 +08:00
michael
f4be6ac84d fix(spi_master): fix the logic in the ISR to prevent re-config registers when device is not changed. 2017-12-28 12:03:29 +08:00
michael
7a7b8fc182 refactor(spi_master): move the clock calculation from ISR to initialization. 2017-12-28 12:03:28 +08:00
Jiang Jiang Jian
7d0d2854d3 Merge branch 'bugfix/btdm_error_when_white_list_is_full' into 'master'
component/bt: Fix bug of adding device to white list has no callback when while list is full

See merge request !1689
2017-12-27 18:03:38 +08:00
Jiang Jiang Jian
566fab02df Merge branch 'bugfix/btdm_disconnect_fail_during_pairing' into 'master'
component/bt: Fix bug of disconnected fail during pairing

See merge request !1672
2017-12-27 18:03:13 +08:00
Ivan Grokhotkov
cbfd162ea8 Merge branch 'bugfix/idle_task_deletes_currently_running_task' into 'master'
freertos: prvCheckTasksWaitingTermination bugfix

See merge request !1686
2017-12-27 16:44:06 +08:00
Jiang Jiang Jian
8051ac469a Merge branch 'cherry-pick-4837f939-2' into 'master'
esp_timer:fix three bugs about timer get and timer alarm where overflow is not correct

See merge request !1695
2017-12-27 11:43:52 +08:00
Jiang Jiang Jian
d31b654f3f Merge branch 'bugfix/btdm_fix_memory_leak_for_SMP' into 'master'
component/bt: fix memory leak in SMP

See merge request !1690
2017-12-27 11:43:18 +08:00
Angus Gratton
ec7cac5fe8 Merge branch 'feature/docs_update_rmt_api' into 'master'
RMT API docs update, new example

See merge request !1564
2017-12-27 09:23:47 +08:00
Angus Gratton
f8580ea98f esp32: Change 192KB runtime static limit workaround to a 176KB link time workaround
Turns out some app memory around 0x3ffdc000 is also used by APP CPU.

This is a workaround until code to remove the 176KB limit is committed.
2017-12-27 11:59:54 +11:00
kooho
d78be97154 add NACK for the last byte to read 2017-12-26 21:50:18 +08:00
Darian Leung
c41c02872f freertos: prvCheckTasksWaitingTermination bugfix
Bugfix to prevent a self deleting no affinity task's memory from being freed by the
idle task of the other core before the self deleting no affinity task is able to context
switch out.  prvCheckTasksWaitingTermination now checks if the task is still on
pxCurrentTCB before freeing task memory.
2017-12-26 19:03:49 +08:00
baohongde
1de63e9d90 component/bt: Fix bug of disconnected fail during pairing 2017-12-25 19:24:06 +08:00
baohongde
f5f8dda8a2 component/bt: Fix bug of adding device to white list has no callback when while list is full 2017-12-25 17:45:12 +08:00
Ivan Grokhotkov
6c2562ceb4 Merge branch 'bugfix/spiram_fails_after_esp_restart' into 'master'
Make psram function after an esp_restart as well.

See merge request !1694
2017-12-21 13:40:10 +08:00
Jiang Jiang Jian
a567de1576 Merge branch 'feature/btdm_classic_discovery' into 'master'
component/bt: implement Classic Bluetooth GAP APIs for device and service discovery

See merge request !1576
2017-12-20 13:30:31 +08:00
zhiweijian
763406b4cc Component/bt: fix memory leak in SMP 2017-12-20 10:30:31 +08:00
Jiang Jiang Jian
04e1195f41 Merge branch 'bugfix/btdm_send_data_length_req_after_read_feature_complete' into 'master'
component/bt: send data length request by host after read feature complete

See merge request !1639
2017-12-19 20:18:50 +08:00
Jack
0a1f81dc01 esp_timer:fix three bugs about timer get and timer alarm where overflow is not correct 2017-12-19 20:05:55 +08:00
Jeroen Domburg
569bfad2e3 Fix the clock subsystem so it doesn't undo the weird condition spiram_psram.c jams the enable/reset bits of SPI3 in when 80MHz mode is selected anymore 2017-12-19 19:12:58 +08:00
Jiang Jiang Jian
709d19f99e Merge branch 'feature/eth_set_mac_addr' into 'master'
emac:add set_eth_mac api

See merge request !1604
2017-12-19 17:40:36 +08:00
Jiang Jiang Jian
9c2db2ea7a Merge branch 'bugfix/btdm_optimiz_adv_cb_func' into 'master'
Bugfix/btdm optimiz adv cb func

See merge request !1619
2017-12-19 17:35:00 +08:00
Jiang Jiang Jian
956133387d Merge branch 'bugfix/fix_some_wifi_bug' into 'master'
Fix some wifi bugs

See merge request !1680
2017-12-19 17:31:44 +08:00
Jiang Jiang Jian
9c5435c14a Merge branch 'bugfix/btdm_mem_release' into 'master'
component/bt : fix btdm mem release cause 0x3ffbbb28-0x3ffbdb28 add to region but should not.

See merge request !1660
2017-12-19 17:31:09 +08:00
Ivan Grokhotkov
f8bda324ec Merge branch 'bugfix/bootloader_v10_backwards_compat' into 'master'
esp32: Fix backwards compatibility for pre-v2.1 bootloaders

See merge request !1673
2017-12-18 17:20:08 +08:00
Jeroen Domburg
361bdcf78c Merge branch 'feature/ringbuf_improvement' into 'master'
Feature/ringbuf improvement

See merge request !1571
2017-12-18 16:52:40 +08:00
Angus Gratton
c69af42b96 esp32: Fix backwards compatibility for pre-v2.1 bootloaders
Older bootloaders don't set RTC_XTAL_FREQ_REG or call rtc_clk_init(),
app needs to pick this up.

Reported at
https://esp32.com/viewtopic.php?f=2&t=3939&p=17836
2017-12-18 13:45:57 +11:00
Angus Gratton
496f6d2744 Merge branch 'bugfix/log_tag_variables_static' into 'master'
log: Remove non-static TAG variables

See merge request !1674
2017-12-18 07:06:36 +08:00
Angus Gratton
661d584ae7 Merge branch 'bugfix/i2c_fixes_pr1180' into 'master'
i2c: rx <-> tx typo's, NULLing free'd variable, consistent CRITICAL sects

See merge request !1551
2017-12-18 06:44:33 +08:00
XiaXiaotian
1e1db75aaa Fix some wifi bugs
1. change first scanning channel to adjust different country code.

2. fix a bug that system crashes when station disconnects from AP.
2017-12-15 18:17:17 +08:00
Yulong
967ff895e7 component/bt: Optimized broadcast callback function, send the callback function to the application after the controller confirms receipt of the broadcast start.
1. optimiz the ble stop adv callback function.
2. added the osi_mutex_unlock in the bta_gattc_wait4_service_change_ccc_cback function when the p_timer_param == NULL ||  p_conn == NULL.
2017-12-15 18:16:23 +08:00
shangke
710e69feca emac:add set_eth_mac api 2017-12-15 17:15:53 +08:00
Angus Gratton
8f874aaa0f Merge branch 'bugfix/i2c_use_queue_instead_of_eventbit' into 'master'
bugfix(i2c): use queue instead of event group for internal commands

See merge request !1616
2017-12-15 13:54:03 +08:00
Angus Gratton
ea2afa83a8 log: Remove non-static TAG variables 2017-12-15 10:59:48 +11:00
Angus Gratton
17f3230305 Merge branch 'bugfix/heap_alloc_typo' into 'master'
fix typo for heap cap free size

See merge request !1669
2017-12-15 06:26:14 +08:00
Ivan Grokhotkov
1b619c0ec8 Merge branch 'bugfix/uart1_console' into 'master'
Fixes for console output on UART1

See merge request !1649
2017-12-14 13:36:34 +08:00
Ivan Grokhotkov
68bba96911 Merge branch 'bugfix/sdmmc_vfs_deinit' into 'master'
SDSPI bug fixes

See merge request !1647
2017-12-14 13:36:20 +08:00
Kewal
ae8a0bbf56 fix typo for heap cap free size 2017-12-14 10:39:26 +05:30
Ivan Grokhotkov
d2bd9cccd8 Merge branch 'feature/ulp_docs_update' into 'master'
ULP docs update

See merge request !1640
2017-12-13 15:36:36 +08:00
Tian Hao
65bdb2d7ff component/bt : fix btdm mem release cause 0x3ffbbb28-0x3ffbdb28 add to region but should not.
1. fix the bug. Modify the condition that esp_bt_controller_mem_release() shoud be only called before esp_bt_controller_init() or after esp_bt_controller_deinit()
2. modify the example to use esp_bt_controller_mem_release()
2017-12-13 11:38:39 +08:00
Ivan Grokhotkov
1c314b34fc Merge branch 'bugfix/rtc_time' into 'master'
Fix compilation issue when using RTC time only, update Kconfig help and source code

See merge request !1650
2017-12-13 11:10:45 +08:00
Ivan Grokhotkov
4839da4d98 Merge branch 'bugfix/fatfs_stat' into 'master'
Fix stat behavior for FATFS mount point

See merge request !1652
2017-12-13 11:10:27 +08:00
zhiweijian
6b6e0410f8 Component/bt: send data length request by host after read feature complete 2017-12-12 18:28:59 +08:00
Angus Gratton
ab6b7b4013 Merge branch 'feature/spiffs_mtime' into 'master'
Add optional mtime support in SPIFFS

See merge request !1579
2017-12-12 14:43:03 +08:00
Ivan Grokhotkov
a99483a727 docs: add information about execution time of ULP instructions 2017-12-11 14:05:41 +08:00
Angus Gratton
dcf94f2189 Merge branch 'bugfix/minor_fixes_github' into 'master'
Minor fixes from github

See merge request !1638
2017-12-11 12:51:41 +08:00
Ivan Grokhotkov
bee1afaf6d time: rename time source option from FRC to "high-resolution timer"
libc time function now rely on esp_timer_get_time as the source of
high-resolution time, rather than FRC1 timer. Internally, on the ESP32
esp_timer implementation uses FRC2 timer.

- Change help text and labels in Kconfig to use "high-resolution timer"
  instead of FRC1. Keep existing Kconfig option name to be backwards
  compatible.
- Change references to "FRC1" in the source code to "FRC".
2017-12-11 12:37:08 +08:00
Ivan Grokhotkov
ca751648fa ulp: document the need to wait for RTC to be ready for wakeup 2017-12-11 12:11:46 +08:00
Ivan Grokhotkov
b6a6973b44 ulp: mention that instructions array must be declared in local scope
Closes https://github.com/espressif/esp-idf/issues/1327
2017-12-11 12:11:46 +08:00
Angus Gratton
5fe1b2e365 Merge branch 'bugfix/openssl_alpn' into 'master'
openssl: add feature check for MBEDTLS_SSL_ALPN

See merge request !1648
2017-12-11 12:03:11 +08:00
Ivan Grokhotkov
dfee6e825a vfs/fatfs: use structures with bit fields for FAT date/time
Replace explicit masks and shifts with bit fields when working with FATFS date and time representations. Also zero-initialize remaining members of struct tm.

Fixes https://github.com/espressif/esp-idf/issues/1369.
2017-12-11 11:11:48 +08:00
Chuck Todd
d913fff6d7 i2c: rx <-> tx typo's, NULLing free'd variable, consistent CRITICAL sects
A couple of typos referencing tx_ring_buf when rx_ring_buf, slv_tx_mux
instead of slv_rx_mux.

Also, I2C_ENTER_CRITICAL()/I2C_EXIT_CRITICAL() usage was not consistent.
Only some of the _set_ functions had them.  Most of the _get_ function
had them?  It is my understanding that they should be wrapped around
writes, not reads? (I think we still need the lock for reading pairs of consistent values)

Also, the ticks_to_wait timeout handling in i2c_master_cmd_begin() would
not handle integer rollover correctly.

Merges https://github.com/espressif/esp-idf/pull/1180
2017-12-11 11:08:39 +08:00
Ivan Grokhotkov
ed1e6e7224 fatfs: fix double free in bailout path of esp_vfs_fat_sdmmc_mount
Fixes https://github.com/espressif/esp-idf/issues/1370
2017-12-11 11:07:08 +08:00
Ivan Grokhotkov
269486ca4d sdspi: use response timeout passed from upper layer
Previously SDSPI host driver would rely on retry count when waiting for
the card to read or write data. This caused different timeout times
depending on CPU frequency and card clock frequency. In practice, card
performance does not depend on these two factors.
This change uses timeout_ms field of sdmmc_command_t introduced
previously for SDMMC host.

Fixes https://esp32.com/viewtopic.php?f=2&t=3440&p=16037 and similar
issues related to SDSPI timeouts.
2017-12-11 11:07:08 +08:00
Ivan Grokhotkov
4170904224 fatfs: fix deinit not called for SDSPI host
Closes https://github.com/espressif/esp-idf/issues/1362
2017-12-11 11:07:08 +08:00
Ivan Grokhotkov
a63ace15bd vfs/fatfs: fix stat call failing when called for mount point
FATFS does not support f_stat call for drive root. When handling stat
for drive root, don't call f_stat and just return struct st with S_IFDIR
flag set.

Closes #984
2017-12-08 20:04:27 +08:00