freestanding: sys_getuid, sys_waitid; minimal fork check; remove bare.S
bogen85
Alexander Medvednikov
parent
39655a7d9b
commit
a9aaa13a09
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@ -7,17 +7,34 @@ const (
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sample_text_file1 = ""
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)
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fn fork_test (test_fn fn(), name string) {
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//print ("checking")
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// a := "$name"
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println (name)
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fn check_fork_minimal () {
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child := sys_fork()
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ec := 100
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if child == 0 {
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test_fn()
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sys_exit(0)
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println("child")
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sys_exit(ec)
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}
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// pid := sys_wait(0)
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// assert
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siginfo := [
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int(0), 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0]
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e := sys_waitid(.p_pid, child, intptr(siginfo.data) , .wexited, 0)
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assert e == .enoerror
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//println(i64_tos(buffer,80,siginfo[sig_index.si_code],16))
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assert siginfo[sig_index.si_code] == int(wi_si_code.cld_exited)
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assert siginfo[sig_index.si_pid] == child
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assert siginfo[sig_index.si_status] == ec
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assert siginfo[sig_index.si_signo] == int(signo.sigchld)
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assert siginfo[sig_index.si_uid] == sys_getuid()
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println("fork minimal check passed")
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}
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fn check_read_write_pipe() {
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@ -316,5 +333,6 @@ fn main() {
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check_int64_array_ro()
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check_voidptr_array_ro()
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check_voidptr_array_rw()
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check_fork_minimal()
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sys_exit(0)
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}
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@ -64,6 +64,50 @@ pub enum wi_si_code {
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CLD_CONTINUED (child continued by SIGCONT).
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*/
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pub enum sig_index {
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si_signo = 0x00
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si_code = 0x02
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si_pid = 0x04
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si_uid = 0x05
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si_status = 0x06
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}
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pub enum signo {
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sigint = 2 // Interactive attention signal.
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sigill = 4 // Illegal instruction.
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sigabrt = 6 // Abnormal termination.
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sigfpe = 8 // Erroneous arithmetic operation.
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sigsegv = 11 // Invalid access to storage.
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sigterm = 15 // Termination request.
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sighup = 1 // Hangup.
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sigquit = 3 // Quit.
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sigtrap = 5 // Trace/breakpoint trap.
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sigkill = 9 // Killed.
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sigpipe = 13 // Broken pipe.
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sigalrm = 14 // Alarm clock.
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sigttin = 21 // Background read from control terminal.
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sigttou = 22 // Background write to control terminal.
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sigpoll = 23 // Pollable event occurred (System V).
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sigxcpu = 24 // CPU time limit exceeded.
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sigxfsz = 25 // File size limit exceeded.
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sigvtalrm = 26 // Virtual timer expired.
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sigprof = 27 // Profiling timer expired.
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sigbus = 7
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sigusr1 = 10
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sigusr2 = 12
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sigchld = 17
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sigcont = 18
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sigstop = 19
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sigtstp = 20
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sigurg = 23
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sigpoll = 29
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sigsys = 31
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}
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pub enum fcntl {
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fd_cloexec = 0x00000001
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f_dupfd = 0x00000000
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@ -191,10 +235,23 @@ fn do_not_call_me_asm_keeper0() {
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"ret\n"
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""
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".intel_syntax noprefix\n"
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".globl sys_call0\n"
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".globl _start, sys_call0\n"
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".globl sys_call1, sys_call2, sys_call3\n"
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".globl sys_call4, sys_call5, sys_call6\n"
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""
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"_start:\n"
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"xor rbp,rbp\n"
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"pop rdi\n"
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"mov rsi,rsp\n"
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"and rsp,-16\n"
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"call main\n"
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"mov rdi,rax\n" /* syscall param 1 = rax (ret value of main) */
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"mov rax,60\n" /* SYS_exit */
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"syscall\n"
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""
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// should never be reached, but if the OS somehow fails to kill us,
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// it will cause a segmentation fault
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"ret\n"
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"sys_call0:\n"
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"mov rax,rdi\n"
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"syscall\n"
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@ -352,8 +409,16 @@ pub fn sys_exit (ec int) {
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sys_call1(60, u64(ec))
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}
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// 102 sys_getuid
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pub fn sys_getuid() int {
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return int(sys_call0(102))
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}
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// 247 sys_waitid int which pid_t upid struct siginfo *infop int options struct rusage *ru
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//pub fn sys_waitid (idtype wi_sys, pid i64, infop voidptr, options
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pub fn sys_waitid (which wi_which, pid int, infop intptr, options wp_sys, ru voidptr) errno {
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return errno(sys_call5(247, u64(which), u64(pid), u64(infop), u64(options), u64(ru)))
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}
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/*
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@ -1,5 +1,10 @@
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module builtin
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const (
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mem_prot = mm_prot(int(mm_prot.prot_read) | int(mm_prot.prot_write))
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mem_flags = map_flags(int(map_flags.map_private) | int(map_flags.map_anonymous))
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)
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pub fn mm_pages(size u64) u32 {
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pages := (u64(size+u64(4))+u64(linux_mem.page_size))/u64(linux_mem.page_size)
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return u32(pages)
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@ -9,9 +14,6 @@ pub fn mm_alloc(size u64) (byteptr, errno) {
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pages := mm_pages(size)
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n_bytes := u64(pages*u32(linux_mem.page_size))
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mem_prot := mm_prot(int(mm_prot.prot_read) | int(mm_prot.prot_write))
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mem_flags := map_flags(int(map_flags.map_private) | int(map_flags.map_anonymous))
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a, e := sys_mmap(0, n_bytes, mem_prot, mem_flags, -1, 0)
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if e == .enoerror {
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mut ap := intptr(a)
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@ -126,7 +126,7 @@ fn (v mut V) cc() {
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v.out_name = v.out_name + '.so'
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}
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if v.pref.is_bare {
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a << '-fno-stack-protector -static -ffreestanding -nostdlib $vdir/vlib/os/bare/bare.S'
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a << '-fno-stack-protector -static -ffreestanding -nostdlib'
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}
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if v.pref.build_mode == .build_module {
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// Create the modules & out directory if it's not there.
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@ -146,13 +146,13 @@ fn (v mut V) cc() {
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debug_mode := v.pref.is_debug
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mut debug_options := '-g'
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mut optimization_options := '-O2'
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mut guessed_compiler := v.pref.ccompiler
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if guessed_compiler == 'cc' && v.pref.is_prod {
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// deliberately guessing only for -prod builds for performance reasons
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if ccversion := os.exec('cc --version') {
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if ccversion.exit_code == 0 {
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if ccversion.output.contains('This is free software;')
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if ccversion.output.contains('This is free software;')
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&& ccversion.output.contains('Free Software Foundation, Inc.') {
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guessed_compiler = 'gcc'
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}
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@ -162,7 +162,7 @@ fn (v mut V) cc() {
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}
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}
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}
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if v.pref.ccompiler.contains('clang') || guessed_compiler == 'clang' {
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if debug_mode {
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debug_options = '-g -O0 -no-pie'
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@ -1,39 +0,0 @@
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.intel_syntax noprefix
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.text
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.globl _start, main__syscall5
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_start:
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xor rbp,rbp
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pop rdi
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mov rsi,rsp
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and rsp,-16
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call main
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mov rdi,rax /* syscall param 1 = rax (ret value of main) */
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mov rax,60 /* SYS_exit */
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syscall
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ret /* should never be reached, but if the OS somehow fails
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to kill us, it will cause a segmentation fault */
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main__syscall5:
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mov rax,rdi
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mov rdi,rsi
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mov rsi,rdx
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mov rdx,rcx
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mov r10,r8
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mov r8,r9
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syscall
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ret
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main__syscall6:
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mov rax,rdi
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mov rdi,rsi
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mov rsi,rdx
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mov rdx,rcx
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mov r10,r8
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mov r8,r9
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mov r9, [rsp+8]
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syscall
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ret
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@ -1,20 +1,7 @@
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fn syscall5(number, arg1, arg2, arg3, arg4, arg5 voidptr) voidptr
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fn write(fd int, data voidptr, nbytes int) int {
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return syscall5(
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1, // SYS_write
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fd,
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data,
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nbytes,
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0, // ignored
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0 // ignored
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)
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}
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fn main() {
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write(1, c'hello\n', 6)
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s := 'test string'
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write(1, s.str, s.len)
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sys_write(1, 'hello\n'.str, 6)
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s := 'test string\n'
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sys_write(1, s.str, u64(s.len))
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a := s[0]
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println("Hello freestanding!")
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}
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