b99ca3f27b
When enable CONFIG_STACK_CANARIES, in general, the stack check in the __gcov_fork function is: " return fork(); 18: e59f3020 ldr r3, [pc, #32] @ 40 <__gcov_fork+0x40> 1c: e5932000 ldr r2, [r3] 20: e59d3004 ldr r3, [sp, #4] 24: e0332002 eors r2, r3, r2 28: e3a03000 mov r3, #0 2c: 1a000002 bne 3c <__gcov_fork+0x3c>" r3 is obtained by taking the value of sp offset. But after opening thumb, the second comparison value in "8c6: 4a06 ldr r2, [pc, #24] @ (8e0 <__gcov_fork+0x30>) 8c8: 6811 ldr r1, [r2, #0] 8ca: 687a ldr r2, [r7, #4] 8cc: 4051 eors r1, r2" is obtained through r7. Since r7 stores the stack address at this time, which stores the address of the parent process, the stack out of bounds will occur in the child process Signed-off-by: wangmingrong1 <wangmingrong1@xiaomi.com> |
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| arch | ||
| audio | ||
| binfmt | ||
| boards | ||
| cmake | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| dummy | ||
| fs | ||
| graphics | ||
| include | ||
| libs | ||
| mm | ||
| net | ||
| openamp | ||
| pass1 | ||
| sched | ||
| syscall | ||
| tools | ||
| video | ||
| wireless | ||
| .asf.yaml | ||
| .gitignore | ||
| .pre-commit-config.yaml | ||
| .yamllint | ||
| AUTHORS | ||
| CMakeLists.txt | ||
| CONTRIBUTING.md | ||
| INVIOLABLES.md | ||
| Kconfig | ||
| LICENSE | ||
| Makefile | ||
| NOTICE | ||
| README.md | ||
| ReleaseNotes | ||
Apache NuttX is a real-time operating system (RTOS) with an emphasis on standards compliance and small footprint. Scalable from 8-bit to 64-bit microcontroller environments, the primary governing standards in NuttX are POSIX and ANSI standards. Additional standard APIs from Unix and other common RTOSs (such as VxWorks) are adopted for functionality not available under these standards, or for functionality that is not appropriate for deeply-embedded environments (such as fork()).
For brevity, many parts of the documentation will refer to Apache NuttX as simply NuttX.
Getting Started
First time on NuttX? Read the Getting Started guide! If you don't have a board available, NuttX has its own simulator that you can run on terminal.
Documentation
You can find the current NuttX documentation on the Documentation Page.
Alternatively, you can build the documentation yourself by following the Documentation Build Instructions.
The old NuttX documentation is still available in the Apache wiki.
Supported Boards
NuttX supports a wide variety of platforms. See the full list on the Supported Platforms page.
Contributing
If you wish to contribute to the NuttX project, read the Contributing guidelines for information on Git usage, coding standard, workflow and the NuttX principles.
License
The code in this repository is under either the Apache 2 license, or a license compatible with the Apache 2 license. See the License Page for more information.