Correct some RISCV64 bits
parent
993d5bc9c9
commit
453157595e
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@ -298,25 +298,25 @@ pub const SYS_fspick = 433;
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pub const SYS_pidfd_open = 434;
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pub const SYS_clone3 = 435;
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pub const O_CREAT = 0100;
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pub const O_EXCL = 0200;
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pub const O_NOCTTY = 0400;
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pub const O_TRUNC = 01000;
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pub const O_APPEND = 02000;
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pub const O_NONBLOCK = 04000;
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pub const O_DSYNC = 010000;
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pub const O_SYNC = 04010000;
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pub const O_RSYNC = 04010000;
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pub const O_DIRECTORY = 0200000;
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pub const O_NOFOLLOW = 0400000;
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pub const O_CLOEXEC = 02000000;
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pub const O_CREAT = 0o100;
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pub const O_EXCL = 0o200;
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pub const O_NOCTTY = 0o400;
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pub const O_TRUNC = 0o1000;
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pub const O_APPEND = 0o2000;
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pub const O_NONBLOCK = 0o4000;
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pub const O_DSYNC = 0o10000;
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pub const O_SYNC = 0o4010000;
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pub const O_RSYNC = 0o4010000;
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pub const O_DIRECTORY = 0o200000;
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pub const O_NOFOLLOW = 0o400000;
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pub const O_CLOEXEC = 0o2000000;
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pub const O_ASYNC = 020000;
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pub const O_DIRECT = 040000;
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pub const O_LARGEFILE = 0100000;
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pub const O_NOATIME = 01000000;
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pub const O_PATH = 010000000;
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pub const O_TMPFILE = 020200000;
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pub const O_ASYNC = 0o20000;
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pub const O_DIRECT = 0o40000;
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pub const O_LARGEFILE = 0o100000;
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pub const O_NOATIME = 0o1000000;
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pub const O_PATH = 0o10000000;
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pub const O_TMPFILE = 0o20200000;
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pub const O_NDELAY = O_NONBLOCK;
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pub const F_DUPFD = 0;
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@ -386,3 +386,5 @@ pub const Stat = extern struct {
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return self.ctim;
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}
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};
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pub const Elf_Symndx = u32;
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@ -469,7 +469,7 @@ var vdso_clock_gettime = @ptrCast(?*const c_void, init_vdso_clock_gettime);
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const vdso_clock_gettime_ty = extern fn (i32, *timespec) usize;
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pub fn clock_gettime(clk_id: i32, tp: *timespec) usize {
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if (VDSO_CGT_SYM.len != 0) {
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if (@hasDecl(@This(), "VDSO_CGT_SYM")) {
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const ptr = @atomicLoad(?*const c_void, &vdso_clock_gettime, .Unordered);
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if (ptr) |fn_ptr| {
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const f = @ptrCast(vdso_clock_gettime_ty, fn_ptr);
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@ -82,3 +82,5 @@ pub fn syscall6(
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: "memory"
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);
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}
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pub extern fn clone(func: extern fn (arg: usize) u8, stack: usize, flags: u32, arg: usize, ptid: *i32, tls: usize, ctid: *i32) usize;
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@ -182,10 +182,7 @@ comptime {
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@export("__stack_chk_fail", __stack_chk_fail, builtin.GlobalLinkage.Strong);
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}
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if (builtin.os == builtin.Os.linux) {
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// TODO implement clone for riscv64
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if (builtin.arch != .riscv64) {
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@export("clone", clone, builtin.GlobalLinkage.Strong);
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}
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@export("clone", clone, builtin.GlobalLinkage.Strong);
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}
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}
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extern fn __stack_chk_fail() noreturn {
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@ -196,87 +193,124 @@ extern fn __stack_chk_fail() noreturn {
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// it causes a segfault in release mode. this is a workaround of calling it
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// across .o file boundaries. fix comptime @ptrCast of nakedcc functions.
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nakedcc fn clone() void {
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if (builtin.arch == builtin.Arch.x86_64) {
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asm volatile (
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\\ xor %%eax,%%eax
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\\ mov $56,%%al // SYS_clone
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\\ mov %%rdi,%%r11
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\\ mov %%rdx,%%rdi
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\\ mov %%r8,%%rdx
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\\ mov %%r9,%%r8
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\\ mov 8(%%rsp),%%r10
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\\ mov %%r11,%%r9
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\\ and $-16,%%rsi
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\\ sub $8,%%rsi
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\\ mov %%rcx,(%%rsi)
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\\ syscall
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\\ test %%eax,%%eax
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\\ jnz 1f
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\\ xor %%ebp,%%ebp
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\\ pop %%rdi
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\\ call *%%r9
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\\ mov %%eax,%%edi
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\\ xor %%eax,%%eax
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\\ mov $60,%%al // SYS_exit
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\\ syscall
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\\ hlt
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\\1: ret
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\\
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);
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} else if (builtin.arch == builtin.Arch.aarch64) {
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// __clone(func, stack, flags, arg, ptid, tls, ctid)
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// x0, x1, w2, x3, x4, x5, x6
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switch (builtin.arch) {
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.x86_64 => {
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asm volatile (
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\\ xor %%eax,%%eax
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\\ mov $56,%%al // SYS_clone
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\\ mov %%rdi,%%r11
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\\ mov %%rdx,%%rdi
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\\ mov %%r8,%%rdx
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\\ mov %%r9,%%r8
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\\ mov 8(%%rsp),%%r10
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\\ mov %%r11,%%r9
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\\ and $-16,%%rsi
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\\ sub $8,%%rsi
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\\ mov %%rcx,(%%rsi)
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\\ syscall
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\\ test %%eax,%%eax
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\\ jnz 1f
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\\ xor %%ebp,%%ebp
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\\ pop %%rdi
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\\ call *%%r9
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\\ mov %%eax,%%edi
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\\ xor %%eax,%%eax
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\\ mov $60,%%al // SYS_exit
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\\ syscall
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\\ hlt
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\\1: ret
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\\
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);
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},
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.aarch64 => {
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// __clone(func, stack, flags, arg, ptid, tls, ctid)
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// x0, x1, w2, x3, x4, x5, x6
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// syscall(SYS_clone, flags, stack, ptid, tls, ctid)
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// x8, x0, x1, x2, x3, x4
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asm volatile (
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\\ // align stack and save func,arg
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\\ and x1,x1,#-16
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\\ stp x0,x3,[x1,#-16]!
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\\
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\\ // syscall
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\\ uxtw x0,w2
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\\ mov x2,x4
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\\ mov x3,x5
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\\ mov x4,x6
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\\ mov x8,#220 // SYS_clone
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\\ svc #0
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\\
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\\ cbz x0,1f
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\\ // parent
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\\ ret
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\\ // child
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\\1: ldp x1,x0,[sp],#16
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\\ blr x1
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\\ mov x8,#93 // SYS_exit
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\\ svc #0
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);
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} else if (builtin.arch == builtin.Arch.arm) {
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asm volatile (
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\\ stmfd sp!,{r4,r5,r6,r7}
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\\ mov r7,#120
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\\ mov r6,r3
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\\ mov r5,r0
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\\ mov r0,r2
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\\ and r1,r1,#-16
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\\ ldr r2,[sp,#16]
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\\ ldr r3,[sp,#20]
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\\ ldr r4,[sp,#24]
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\\ svc 0
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\\ tst r0,r0
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\\ beq 1f
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\\ ldmfd sp!,{r4,r5,r6,r7}
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\\ bx lr
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\\
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\\1: mov r0,r6
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\\ bl 3f
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\\2: mov r7,#1
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\\ svc 0
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\\ b 2b
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\\3: bx r5
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);
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} else {
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@compileError("Implement clone() for this arch.");
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// syscall(SYS_clone, flags, stack, ptid, tls, ctid)
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// x8, x0, x1, x2, x3, x4
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asm volatile (
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\\ // align stack and save func,arg
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\\ and x1,x1,#-16
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\\ stp x0,x3,[x1,#-16]!
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\\
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\\ // syscall
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\\ uxtw x0,w2
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\\ mov x2,x4
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\\ mov x3,x5
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\\ mov x4,x6
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\\ mov x8,#220 // SYS_clone
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\\ svc #0
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\\
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\\ cbz x0,1f
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\\ // parent
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\\ ret
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\\ // child
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\\1: ldp x1,x0,[sp],#16
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\\ blr x1
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\\ mov x8,#93 // SYS_exit
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\\ svc #0
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);
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},
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.arm => {
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asm volatile (
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\\ stmfd sp!,{r4,r5,r6,r7}
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\\ mov r7,#120
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\\ mov r6,r3
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\\ mov r5,r0
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\\ mov r0,r2
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\\ and r1,r1,#-16
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\\ ldr r2,[sp,#16]
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\\ ldr r3,[sp,#20]
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\\ ldr r4,[sp,#24]
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\\ svc 0
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\\ tst r0,r0
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\\ beq 1f
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\\ ldmfd sp!,{r4,r5,r6,r7}
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\\ bx lr
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\\
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\\1: mov r0,r6
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\\ bl 3f
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\\2: mov r7,#1
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\\ svc 0
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\\ b 2b
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\\3: bx r5
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);
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},
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.riscv64 => {
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// __clone(func, stack, flags, arg, ptid, tls, ctid)
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// a0, a1, a2, a3, a4, a5, a6
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// syscall(SYS_clone, flags, stack, ptid, tls, ctid)
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// a7 a0, a1, a2, a3, a4
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asm volatile (
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\\ # Save func and arg to stack
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\\ addi a1, a1, -16
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\\ sd a0, 0(a1)
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\\ sd a3, 8(a1)
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\\
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\\ # Call SYS_clone
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\\ mv a0, a2
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\\ mv a2, a4
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\\ mv a3, a5
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\\ mv a4, a6
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\\ li a7, 220 # SYS_clone
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\\ ecall
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\\
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\\ beqz a0, 1f
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\\ # Parent
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\\ ret
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\\
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\\ # Child
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\\1: ld a1, 0(sp)
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\\ ld a0, 8(sp)
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\\ jalr a1
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\\
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\\ # Exit
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\\ li a7, 93 # SYS_exit
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\\ ecall
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);
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},
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else => @compileError("Implement clone() for this arch."),
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}
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}
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