xiaoxiang781216 commented on a change in pull request #5782: URL: https://github.com/apache/incubator-nuttx/pull/5782#discussion_r838219709
########## File path: arch/risc-v/src/common/riscv_swint.c ########## @@ -179,6 +187,31 @@ int riscv_swint(int irq, void *context, void *arg) riscv_registerdump(regs); #endif + /* Handle the syscall */ + + regs = riscv_handle_syscall(regs); + + /* Report what happened. That might difficult in the case of a context + * switch + */ + +#ifdef CONFIG_DEBUG_SYSCALL_INFO + if (regs != CURRENT_REGS) + { + svcinfo("SWInt Return: Context switch!\n"); + riscv_registerdump((const uintptr_t *)CURRENT_REGS); + } + else + { + svcinfo("SWInt Return: %d\n", regs[REG_A0]); + } +#endif + + return OK; +} + +void *riscv_handle_syscall(uintptr_t *regs) Review comment: Each CPU has a dedicated CURRENT_REGS, so it is re-entrant from CPU level. For a specific CPU, if RISCV implementation follow ARM here: https://github.com/apache/incubator-nuttx/blob/master/arch/arm/src/armv8-m/arm_doirq.c#L58-L62 https://github.com/apache/incubator-nuttx/blob/master/arch/arm/src/armv8-m/arm_doirq.c#L78-L84 The re-entrant should work again. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@nuttx.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org