Laczen opened a new pull request, #3062:
URL: https://github.com/apache/nuttx-apps/pull/3062
Add the possibility to create a `romfs` image for an "external" file system.
The `romfs.img` can directly be written to a configurable `mtdblock` device.
## Summary
The elf loader can also be used to generate a `romfs.img` that contains
applications. This `romfs.img` can be written directly to a internal `mtdblock`
device. The example then provides a method to separate `kernel` from
applications and
allows recompilation and update of the `romfs` without a kernel update.
## Impact
None, it is an extra sample configuration.
## Testing
Tested on `esp32_devkitc:elf`. The romfs.img is copied to mtdblock0 using
(0x180000 is the start of mtdblock0):
```
esptool.py write_flash 0x180000 nuttx/apps/examples/elf/tests/romfs.img
```
The test is then performed as:
```console
nsh> elf
Initial memory usage: 13908
Mounting romfs filesystem at target=/mnt/elf/romfs on /dev/mtdblock0
Memory Usage after mount:
Before: 13908 After: 19052 Change: 5144
****************************************************************************
* Executing errno
****************************************************************************
Memory Usage after exec:
Before: 19052 After: 22324 Change: 3272
Hello, World on stdout
Wait a bit for test completion
Hello, World on stderr
We failed to open "aflav-sautga-ay!" errno is 0
Memory Usage after program execution:
Before: 22324 After: 22140 Change: -184
****************************************************************************
* Executing hello
****************************************************************************
Memory Usage after exec:
Before: 22140 After: 22324 Change: 184
Wait a bit for test completion
Getting ready to say "Hello, world"
Hello, world!
It has been said.
argc = 1
argv = 0x3ffe38b8
argv[0] = (0x3ffe38c0) "hello"
argv[1] = 0
Goodbye, world!
Memory Usage after program execution:
Before: 22324 After: 22140 Change: -184
****************************************************************************
* Executing hello++1
****************************************************************************
Memory Usage after exec:
Before: 22140 After: 22324 Change: 184
Wait a bit for test completion
Hello, World!
Memory Usage after program execution:
Before: 22324 After: 22140 Change: -184
****************************************************************************
* Executing hello++2
****************************************************************************
Memory Usage after exec:
Before: 22140 After: 22324 Change: 184
Wait a bit for test completion
main: Started. Creating MyThingSayer
CThingSayer::CThingSayer: I am!
main: Created MyThingSayer=0x3ffe3120
main: Calling MyThingSayer->Initialize
CThingSayer::Initialize: When told, I will say 'Hello, World!'
main: Calling MyThingSayer->SayThing
CThingSayer::SayThing: I am now saying 'Hello, World!'
main: Destroying MyThingSayer
CThingSayer::~CThingSayer: I cease to be
CThingSayer::~CThingSayer: I will never say 'Hello, World!' again
main: Returning
Memory Usage after program execution:
Before: 22324 After: 22140 Change: -184
****************************************************************************
* Executing hello++3
****************************************************************************
Memory Usage after exec:
Before: 22140 After: 22348 Change: 208
Wait a bit for test completion
CThingSayer::CThingSayer: I am!
main: Started. MyThingSayer should already exist
main: Calling MyThingSayer.Initialize
CThingSayer::Initialize: When told, I will say 'Hello, World!'
main: Calling MyThingSayer.SayThing
CThingSayer::SayThing: I am now saying 'Hello, World!'
main: Returning. MyThingSayer should be destroyed
CThingSayer::~CThingSayer: I cease to be
CThingSayer::~CThingSayer: I will never say 'Hello, World!' again
Memory Usage after program execution:
Before: 22348 After: 22140 Change: -208
****************************************************************************
* Executing mutex
****************************************************************************
Memory Usage after exec:
Before: 22140 After: 22380 Change: 240
Wait a bit for test completion
Starting thread 1
Starting thread 2
Stopping threads
Thread1 Thread2
Loops 10 10
Errors 0 0
Memory Usage after program execution:
Before: 22380 After: 26684 Change: 4304
****************************************************************************
* Executing pthread
****************************************************************************
Memory Usage after exec:
Before: 26684 After: 22324 Change: -4360
Wait a bit for test completion
PARENT: started
PARENT: calling pthread_start with arg=305419896
CHILD: started with arg=305419896
CHILD: returning -2023406815
PARENT child exitted with -2023406815
PARENT returning success
Memory Usage after program execution:
Before: 22324 After: 24412 Change: 2088
****************************************************************************
* Executing signal
****************************************************************************
Memory Usage after exec:
Before: 24412 After: 22348 Change: -2064
Wait a bit for test completion
Setting up signal handlers from pid=13
Old SIGUSR1 sighandler at 0
New SIGUSR1 sighandler at 0x40086480
Old SIGUSR2 sighandler at 0
New SIGUSR2 sighandler at 0x40086480
Raising SIGUSR1 from pid=13
Kill-ing SIGUSR1 from pid=13
siguser_action: Received signo=10 siginfo=0x3ffb13fc arg=0
SIGUSR1 received
siginfo:
si_signo = 10
si_code = 0
si_errno = 4
si_value = 0
SIGUSR1 raised from pid=13
SIGUSR1 not received
Memory Usage after program execution:
Before: 22348 After: 22172 Change: -176
****************************************************************************
* Executing struct
****************************************************************************
Memory Usage after exec:
Before: 22172 After: 22380 Change: 208
Wait a bit for test completion
Calling getstruct()
getstruct returned 0x40086688
n = 42 (vs 42) PASS
pn = 0x3ffe3290 (vs 0x3ffe3290) PASS
*pn = 87 (vs 87) PASS
ps = 0x40086684 (vs 0x40086684) PASS
ps->n = 117 (vs 117) PASS
pf = 0x40086454 (vs 0x40086454) PASS
Calling mystruct->pf()
In dummyfunc() -- PASS
Exit-ing
Memory Usage after program execution:
Before: 22380 After: 22172 Change: -208
****************************************************************************
* Executing task
****************************************************************************
Memory Usage after exec:
Before: 22172 After: 22412 Change: 240
Wait a bit for test completion
Parent: Started, pid=20
Parent: Calling task_create()
Parent: Waiting for child (pid=22)
Child: execv was successful!
Child: argc=2
Child: argv[0]="child"
Child: argv[1]="Hello from your parent!"
Child: Exit-ting with status=0
Parent: Exit-ing
Memory Usage after program execution:
Before: 22412 After: 25260 Change: 2848
Memory Usage End-of-Test:
Before: 25260 After: 25260 Change: 0
nsh>
```
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