115 lines
3.1 KiB
Zig
115 lines
3.1 KiB
Zig
usingnamespace @import("../bits.zig");
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pub fn syscall0(number: usize) usize {
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return asm volatile ("svc #0"
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: [ret] "={r0}" (-> usize)
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: [number] "{r7}" (number)
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: "memory"
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);
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}
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pub fn syscall1(number: usize, arg1: usize) usize {
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return asm volatile ("svc #0"
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: [ret] "={r0}" (-> usize)
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: [number] "{r7}" (number),
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[arg1] "{r0}" (arg1)
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: "memory"
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);
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}
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pub fn syscall2(number: usize, arg1: usize, arg2: usize) usize {
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return asm volatile ("svc #0"
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: [ret] "={r0}" (-> usize)
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: [number] "{r7}" (number),
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[arg1] "{r0}" (arg1),
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[arg2] "{r1}" (arg2)
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: "memory"
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);
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}
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pub fn syscall3(number: usize, arg1: usize, arg2: usize, arg3: usize) usize {
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return asm volatile ("svc #0"
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: [ret] "={r0}" (-> usize)
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: [number] "{r7}" (number),
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[arg1] "{r0}" (arg1),
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[arg2] "{r1}" (arg2),
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[arg3] "{r2}" (arg3)
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: "memory"
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);
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}
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pub fn syscall4(number: usize, arg1: usize, arg2: usize, arg3: usize, arg4: usize) usize {
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return asm volatile ("svc #0"
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: [ret] "={r0}" (-> usize)
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: [number] "{r7}" (number),
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[arg1] "{r0}" (arg1),
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[arg2] "{r1}" (arg2),
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[arg3] "{r2}" (arg3),
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[arg4] "{r3}" (arg4)
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: "memory"
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);
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}
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pub fn syscall5(number: usize, arg1: usize, arg2: usize, arg3: usize, arg4: usize, arg5: usize) usize {
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return asm volatile ("svc #0"
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: [ret] "={r0}" (-> usize)
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: [number] "{r7}" (number),
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[arg1] "{r0}" (arg1),
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[arg2] "{r1}" (arg2),
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[arg3] "{r2}" (arg3),
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[arg4] "{r3}" (arg4),
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[arg5] "{r4}" (arg5)
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: "memory"
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);
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}
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pub fn syscall6(
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number: usize,
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arg1: usize,
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arg2: usize,
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arg3: usize,
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arg4: usize,
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arg5: usize,
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arg6: usize,
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) usize {
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return asm volatile ("svc #0"
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: [ret] "={r0}" (-> usize)
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: [number] "{r7}" (number),
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[arg1] "{r0}" (arg1),
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[arg2] "{r1}" (arg2),
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[arg3] "{r2}" (arg3),
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[arg4] "{r3}" (arg4),
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[arg5] "{r4}" (arg5),
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[arg6] "{r5}" (arg6)
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: "memory"
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);
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}
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/// This matches the libc clone function.
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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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// LLVM calls this when the read-tp-hard feature is set to false. Currently, there is no way to pass
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// that to llvm via zig, see https://github.com/ziglang/zig/issues/2883.
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// LLVM expects libc to provide this function as __aeabi_read_tp, so it is exported if needed from special/c.zig.
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pub extern fn getThreadPointer() usize {
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return asm volatile ("mrc p15, 0, %[ret], c13, c0, 3"
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: [ret] "=r" (-> usize)
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);
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}
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pub nakedcc fn restore() void {
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return asm volatile ("svc #0"
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:
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: [number] "{r7}" (usize(SYS_sigreturn))
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: "memory"
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);
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}
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pub nakedcc fn restore_rt() void {
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return asm volatile ("svc #0"
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:
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: [number] "{r7}" (usize(SYS_rt_sigreturn))
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: "memory"
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);
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}
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