apache
libc machine code update
Summary
This PR updates various machine-dependent and libc source files within NuttX, primarily enhancing support and correctness for RISC-V and simulator architectures. The changes include:
Modifications to machine code and assembly-level utility functions, improving compatibility and behavior for simulator and RISC-V targets. Updates to libc implementations to refine platform-dependent operations, fix bugs, and ensure consistency across supported architectures. Minor cleanups and refactoring of platform conditionals and structure definitions to support wider hardware variety.
Impact
Improves reliability and maintainability of libc and machine-dependent functionality, especially for RISC-V and simulator platforms. Enhances compatibility for future developments on simulator and real hardware. No user-facing API changes. May benefit developers working with board:simulator configurations, and those targeting RISC-V systems.
Testing
Automated and manual testing was performed: system boot, task creation, and basic libc function calls were verified.
RISC-V qemu, arm qemu
Host: x86_64 Linux
@GUIDINGLI please fix:
../nuttx/tools/checkpatch.sh -c -u -m -g fc0647491b8bfaf90419ac7cb66ac6858a6cd76c..HEAD
❌ Missing git commit message
❌ Missing git commit message
@GUIDINGLI please fix:
../nuttx/tools/checkpatch.sh -c -u -m -g fc0647491b8bfaf90419ac7cb66ac6858a6cd76c..HEAD ❌ Missing git commit message ❌ Missing git commit message
done
These three patch are will test and described on commit msg.
libs/risc-v:add cfi for optimized compilation func
(gdb) bt
at /home/mi/ssd/dev-system/nuttx/include/string.h:321
ppcmd=<synthetic pointer>, vtbl=0x80069498) at nsh_parse.c:1909
param=0x800692b8) at nsh_parse.c:2593
cmdline=cmdline@entry=0x80069750 "hello") at nsh_parse.c:3028
argc=argc@entry=1, argv=argv@entry=0x80068870) at nsh_session.c:246
at nsh_consolemain.c:75
at nsh_main.c:74
...
libc/arm64: add cfi for optimized func
(gdb) bt
#0 arch_strlen () at machine/arm64/gnu/arch_strlen.S:119
#1 0x000000004043a2c0 in strchr (s=s@entry=0x408e5e40 "HELLO WORLD", c=c@entry=87) at machine/arch_libc.c:252
#2 0x0000000040504c6c in strchr (c=87, s=0x408e5e40 "HELLO WORLD") at /home/mi/ssd/dev-system/nuttx/include/string.h:306
#3 test_strchr () at hello_main.c:79
#4 hello_main (argc=argc@entry=1, argv=argv@entry=0x40b5c090) at hello_main.c:132
#5 0x000000004043d958 in nxtask_startup (entrypt=0x40504ba0 <hello_main>, argc=argc@entry=1, argv=argv@entry=0x40b5c090) at sched/task_startup.c:72
#6 0x00000000403f1ab4 in nxtask_start () at task/task_start.c:104
#7 0x0000000000000000 in ?? ()
armv7a:add cfi instrcutions to debug
(gdb) bt
#0 memset () at machine/arm/armv7-a/gnu/arch_memset.S:45
#1 0x0407222e in memset (n=4, c=65, s=0x40269d94) at /home/mi/ssd/dev-system/nuttx/include/string.h:203
#2 test_memset () at hello_main.c:57
#3 hello_main (argc=<optimized out>, argv=<optimized out>) at hello_main.c:66
#4 0x0403f1de in nxtask_startup (entrypt=0x40721b1 <hello_main>, argc=1, argv=0x40269628) at sched/task_startup.c:72
#5 0x0400c66a in nxtask_start () at task/task_start.c:104
#6 0x00000000 in ?? ()
memset patch: memset: add none NEON version support for armv7-a/r: test with ARM_NEON disable: boards/arm/qemu/qemu-armv7a/configs/nsh/
arch:use ARCH_64BIT to mark arch is support 64bit no C code modify, only Kconfig modification. Only need compile pass and CT pass.
memcpy: fix link failed when open kasan: no C code modify, only Kconfig modification. Only need compile pass and CT pass.