Read-Write Mirror of Apache NuttX RTOS
84a3639774
test code hello_main
int main(int argc, FAR char *argv[])
{
uint32_t *p = 0xdeedbeff;
*p = 0xffffff;
printf("%p\n %x\n", p, *p);
return 0;
}
qemu mps3-an547 hello_main :
Triggering an exception, and gdb backtrace is:
before:
(gdb) bt
/#0 0x0001168a in systick_getstatus (lower_=0x100010c <g_systick_lower>, status=0x1000a30 <g_intstackalloc+1600>)
at /home/ajh/work/vela_system/nuttx/arch/arm/src/armv8-m/arm_systick.c:142
/#1 0x000122f4 in current_usec () at /home/ajh/work/vela_system/nuttx/drivers/timers/arch_timer.c:105
/#2 0x0001234c in udelay_accurate (microseconds=250000) at /home/ajh/work/vela_system/nuttx/drivers/timers/arch_timer.c:115
/#3 0x000124bc in up_udelay (microseconds=250000) at /home/ajh/work/vela_system/nuttx/drivers/timers/arch_timer.c:463
/#4 0x0001249e in up_mdelay (milliseconds=250) at /home/ajh/work/vela_system/nuttx/drivers/timers/arch_timer.c:446
/#5 0x0000920c in reset_board () at /home/ajh/work/vela_system/nuttx/sched/misc/assert.c:830
/#6 0x0000937c in _assert (filename=0x393f8 "/arch/arm/src/armv8-m/arm_busfault.c", linenum=113, msg=0x393f0 "panic", regs=0x1008500)
at /home/ajh/work/vela_system/nuttx/sched/misc/assert.c:940
/#7 0x00000e2c in arm_busfault (irq=3, context=0x1008500, arg=0x0 <up_ndelay>) at /home/ajh/work/vela_system/nuttx/arch/arm/src/armv8-m/arm_busfault.c:113
/#8 0x000012d2 in arm_hardfault (irq=3, context=0x1008500, arg=0x0 <up_ndelay>)
at /home/ajh/work/vela_system/nuttx/arch/arm/src/armv8-m/arm_hardfault.c:142
/#9 0x00008b20 in irq_dispatch (irq=3, context=0x1008500) at /home/ajh/work/vela_system/nuttx/sched/irq/irq_dispatch.c:145
/#10 0x0000041a in arm_doirq (irq=3, regs=0x1008500) at /home/ajh/work/vela_system/nuttx/arch/arm/src/armv8-m/arm_doirq.c:103
/#11 0x0000034e in exception_common () at /home/ajh/work/vela_system/nuttx/arch/arm/src/armv8-m/arm_exception.S:224
after:
(gdb) bt
/#0 systick_is_running () at /home/ajh/work/vela_system/nuttx/arch/arm/src/armv8-m/arm_systick.c:106
/#1 0x000125c0 in systick_getstatus (lower_=0x1000114 <g_systick_lower>, status=0x1007a20)
at /home/ajh/work/vela_system/nuttx/arch/arm/src/armv8-m/arm_systick.c:141
/#2 0x0001323c in current_usec () at /home/ajh/work/vela_system/nuttx/drivers/timers/arch_timer.c:105
/#3 0x00013294 in udelay_accurate (microseconds=250000) at /home/ajh/work/vela_system/nuttx/drivers/timers/arch_timer.c:115
/#4 0x00013404 in up_udelay (microseconds=250000) at /home/ajh/work/vela_system/nuttx/drivers/timers/arch_timer.c:463
/#5 0x000133e6 in up_mdelay (milliseconds=250) at /home/ajh/work/vela_system/nuttx/drivers/timers/arch_timer.c:446
/#6 0x00008c5c in reset_board () at /home/ajh/work/vela_system/nuttx/sched/misc/assert.c:816
/#7 0x00008e88 in _assert (filename=0x39408 "/arch/arm/src/armv8-m/arm_busfault.c", linenum=113, msg=0x39400 "panic", regs=0x1007cf0)
at /home/ajh/work/vela_system/nuttx/sched/misc/assert.c:915
/#8 0x00000ce4 in arm_busfault (irq=3, context=0x1007cf0, arg=0x0 <up_ndelay>)
at /home/ajh/work/vela_system/nuttx/arch/arm/src/armv8-m/arm_busfault.c:113
/#9 0x0000118a in arm_hardfault (irq=3, context=0x1007cf0, arg=0x0 <up_ndelay>)
at /home/ajh/work/vela_system/nuttx/arch/arm/src/armv8-m/arm_hardfault.c:142
/#10 0x000086cc in irq_dispatch (irq=3, context=0x1007cf0) at /home/ajh/work/vela_system/nuttx/sched/irq/irq_dispatch.c:145
/#11 0x0000041e in arm_doirq (irq=3, regs=0x1007cf0) at /home/ajh/work/vela_system/nuttx/arch/arm/src/armv8-m/arm_doirq.c:99
/#12 0x00000360 in exception_common () at /home/ajh/work/vela_system/nuttx/arch/arm/src/armv8-m/arm_exception.S:230
/#13 0x00027a8c in hello_main (argc=1, argv=0x1006e20) at /home/ajh/work/vela_system/apps/examples/hello/hello_main.c:39
/#14 0x00014968 in nxtask_startup (entrypt=0x27a7d <hello_main>, argc=1, argv=0x1006e20)
at /home/ajh/work/vela_system/nuttx/libs/libc/sched/task_startup.c:72
/#15 0x0000f450 in nxtask_start () at /home/ajh/work/vela_system/nuttx/sched/task/task_start.c:116
/#16 0x00000000 in ?? ()
(gdb)
qemu armv7a nsh, hello_main:
before:
(gdb) bt
/#0 udelay_coarse (microseconds=156000) at /home/ajh/work/vela_system/nuttx/drivers/timers/arch_alarm.c:67
/#1 up_ndelay (nanoseconds=nanoseconds@entry=250000000) at /home/ajh/work/vela_system/nuttx/drivers/timers/arch_alarm.c:431
/#2 0x0060c630 in up_udelay (microseconds=microseconds@entry=250000) at /home/ajh/work/vela_system/nuttx/drivers/timers/arch_alarm.c:416
/#3 0x0060c644 in up_mdelay (milliseconds=milliseconds@entry=250) at /home/ajh/work/vela_system/nuttx/drivers/timers/arch_alarm.c:401
/#4 0x006056bc in reset_board () at /home/ajh/work/vela_system/nuttx/sched/misc/assert.c:816
/#5 _assert (filename=filename@entry=0x63047f "/arch/arm/src/armv7-a/arm_dataabort.c", linenum=linenum@entry=157, msg=msg@entry=0x62f56d "panic",
regs=<optimized out>, regs@entry=0x4020af10) at /home/ajh/work/vela_system/nuttx/sched/misc/assert.c:915
/#6 0x0060bd74 in arm_dataabort (regs=0x4020af10, dfar=<optimized out>, dfsr=<optimized out>)
at /home/ajh/work/vela_system/nuttx/arch/arm/src/armv7-a/arm_dataabort.c:157
/#7 0x0060bc04 in arm_vectordata () at /home/ajh/work/vela_system/nuttx/arch/arm/src/armv7-a/arm_vectors.S:438
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb)
after:
(gdb) bt
/#0 udelay_coarse (microseconds=192000) at /home/ajh/work/vela_system/nuttx/drivers/timers/arch_alarm.c:67
/#1 up_ndelay (nanoseconds=nanoseconds@entry=250000000) at /home/ajh/work/vela_system/nuttx/drivers/timers/arch_alarm.c:431
/#2 0x0060c650 in up_udelay (microseconds=microseconds@entry=250000) at /home/ajh/work/vela_system/nuttx/drivers/timers/arch_alarm.c:416
/#3 0x0060c664 in up_mdelay (milliseconds=milliseconds@entry=250) at /home/ajh/work/vela_system/nuttx/drivers/timers/arch_alarm.c:401
/#4 0x006056bc in reset_board () at /home/ajh/work/vela_system/nuttx/sched/misc/assert.c:816
/#5 _assert (filename=filename@entry=0x63047f "/arch/arm/src/armv7-a/arm_dataabort.c", linenum=linenum@entry=157, msg=msg@entry=0x62f56d "panic",
regs=<optimized out>, regs@entry=0x4020af10) at /home/ajh/work/vela_system/nuttx/sched/misc/assert.c:915
/#6 0x0060bd94 in arm_dataabort (regs=0x4020af10, dfar=<optimized out>, dfsr=<optimized out>)
at /home/ajh/work/vela_system/nuttx/arch/arm/src/armv7-a/arm_dataabort.c:157
/#7 0x0060bc08 in arm_vectordata () at /home/ajh/work/vela_system/nuttx/arch/arm/src/armv7-a/arm_vectors.S:453
/#8 0x00620cd4 in hello_main (argc=4999, argv=0x0) at /home/ajh/work/vela_system/apps/examples/hello/hello_main.c:41
/#9 0x0060d320 in nxtask_startup (entrypt=0x620cc4 <hello_main>, argc=1, argv=0x4020a088)
at /home/ajh/work/vela_system/nuttx/libs/libc/sched/task_startup.c:72
/#10 0x00609b50 in nxtask_start () at /home/ajh/work/vela_system/nuttx/sched/task/task_start.c:116
/#11 0x00000000 in ?? ()
qemu risc-v nsh
before:
(gdb) bt
/#0 udelay_coarse (microseconds=228000, microseconds@entry=891896832) at timers/arch_alarm.c:67
/#1 up_ndelay (nanoseconds=nanoseconds@entry=250000000) at timers/arch_alarm.c:431
/#2 0x8000397e in up_udelay (microseconds=microseconds@entry=250000) at timers/arch_alarm.c:416
/#3 0x80003988 in up_mdelay (milliseconds=milliseconds@entry=250) at timers/arch_alarm.c:401
/#4 0x80011f1c in reset_board () at misc/assert.c:813
/#5 0x80011f7a in _assert (filename=filename@entry=0x0, linenum=linenum@entry=0, msg=msg@entry=0x8002114c "panic", regs=<optimized out>,
regs@entry=0x80030704) at misc/assert.c:915
/#6 0x80006ad6 in riscv_exception (mcause=<optimized out>, regs=0x80030704, args=<optimized out>) at common/riscv_exception.c:129
/#7 0x80000d9e in riscv_doirq (irq=7, regs=<optimized out>) at common/riscv_doirq.c:99
/#8 0x80000164 in exception_common () at common/riscv_exception_common.S:210
Backtrace stopped: frame did not save the PC
(gdb)
after
(gdb) bt
/#0 0x80003922 in udelay_coarse (microseconds=90000, microseconds@entry=891896832) at timers/arch_alarm.c:67
/#1 up_ndelay (nanoseconds=nanoseconds@entry=250000000) at timers/arch_alarm.c:431
/#2 0x8000397e in up_udelay (microseconds=microseconds@entry=250000) at timers/arch_alarm.c:416
/#3 0x80003988 in up_mdelay (milliseconds=milliseconds@entry=250) at timers/arch_alarm.c:401
/#4 0x80011f2a in reset_board () at misc/assert.c:816
/#5 0x80011f7a in _assert (filename=filename@entry=0x0, linenum=linenum@entry=0, msg=msg@entry=0x8002114c "panic", regs=<optimized out>,
regs@entry=0x80030704) at misc/assert.c:915
/#6 0x80006ad6 in riscv_exception (mcause=<optimized out>, regs=0x80030704, args=<optimized out>) at common/riscv_exception.c:129
/#7 0x80000d9e in riscv_doirq (irq=7, regs=<optimized out>) at common/riscv_doirq.c:99
/#8 0x80000166 in exception_common () at common/riscv_exception_common.S:215
/#9 0x8001792a in hello_main (argc=<optimized out>, argv=<optimized out>) at hello_main.c:41
/#10 0x80004b52 in nxtask_startup (entrypt=0x80030704, argc=1, argv=0x800300e8) at sched/task_startup.c:72
/#11 0x80001e72 in nxtask_start () at task/task_start.c:116
/#12 0x00000000 in ?? ()
Backtrace stopped: frame did not save the PC
(gdb)
Signed-off-by: anjiahao <anjiahao@xiaomi.com>
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| 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.
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You can find the current NuttX documentation on the Documentation Page.
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The old NuttX documentation is still available in the Apache wiki.
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NuttX supports a wide variety of platforms. See the full list on the Supported Platforms page.
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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.
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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.