biscuit/ls error on ubuntu16.04 x86_64

[deltavoid]

The output lools like this:

Hello world! from CPU 1! Hello world! from CPU 2! Hello world! from CPU 3! Hello world! from CPU 0! Available programs: [".", "..", "busybox", "rust", "biscuit"]

biscuit/ls [ERROR] EXCEPTION: Page Fault @ 0xffffffffffffffd0, code: PRESENT | WRITE | USER [ERROR] TrapFrame { fpstate_offset: 0x8, fpstate: fpstate, fsbase: 0x0, r15: 0x0, r14: 0x0, r13: 0x2, r12: 0x2, rbp: 0x180000ffe30, rbx: 0x0, r11: 0x0, r10: 0x0, r9: 0x1000, r8: 0x3, rsi: 0x902, rdi: 0x4a8927, rdx: 0xffffffffffffffd0, rcx: 0x0, rax: 0x2, trap_num: 0xe, error_code: 0x7, rip: 0x41204d, cs: 0x13, rflags: 0x213, rsp: 0x180000ffdb0, ss: 0x1b } [ERROR] On CPU0 Process 1

[chyyuu]

When I delete musl-tools, musl, musl-dev package in ubuntu 16.04, the sfsimg could be built correctly. So I think the make uses gcc-glibc instead of gcc-musllibc. We should check Makefile in usr DIR

[chyyuu]

FIX method: passed in ubuntu 16.04 x86-64

step 1: build musl-gcc with gcc-6.4+musl-1.1.21

git clone https://github.com/richfelker/musl-cross-make.git cp config.mak.dist config.mak

add two line in config.mak

TARGET = x86_64-linux-musl
OUTPUT = /usr/local

make && sudo make install

step 2: remove ubuntu musl* packages

sudo apt remove musl*

step 3: use x86_64-linux-musl-gcc to rebuild sfsimg

change rcore_plus/user/biscuit/CMakeLists.txt LINE:35

        set(PREFIX          x86_64-linux-musl-)

cd usr && make clean && make sfsimg arch=x86_64 cd ../kernel && make run arch=x86_64

in qemu

biscuit/ls ##should work now

[deltavoid]

I have solve the problem with the method above.

Hello world! from CPU 1!
Hello world! from CPU 2!
Hello world! from CPU 3!
Hello world! from CPU 0!
Available programs: [".", "..", "busybox", "biscuit", "rust"]
>> 
>> biscuit/ls
>> [ WARN] sys_set_tid_address is unimplemented
[ WARN] sys_ioctl is unimplemented
./:
[ WARN] sys_brk is unimplemented
[ WARN] sys_brk is unimplemented
[ WARN] sys_fcntl is unimplemented
[ WARN] stat is partial implemented as lstat
drwxr-xr-x 5 .
[ WARN] stat is partial implemented as lstat
drwxr-xr-x 5 ..
[ WARN] stat is partial implemented as lstat
-rwxr-xr-x 973200 busybox
[ WARN] stat is partial implemented as lstat
drwxr-xr-x 58 biscuit
[ WARN] stat is partial implemented as lstat
drwxr-xr-x 5 rust