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Kernel: Implement userspace support for syscalls on AARCH64

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There are no guarantees that the final syscall API will look like this
but at least for now this lets us compile the userland binaries.
This commit is contained in:
Gunnar Beutner 2022-10-12 22:04:17 +02:00 committed by Linus Groh
parent a650c74b27
commit 5921df75b6
1 changed files with 56 additions and 6 deletions
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62
Kernel/API/Syscall.h
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@ -483,7 +483,7 @@ struct SC_chmod_params {
void initialize();
int sync();
# if ARCH(I386) || ARCH(X86_64)
# if ARCH(I386) || ARCH(X86_64) || ARCH(AARCH64)
inline uintptr_t invoke(Function function)
{
uintptr_t result;
@ -492,11 +492,19 @@ inline uintptr_t invoke(Function function)
: "=a"(result)
: "a"(function)
: "memory");
# else
# elif ARCH(X86_64)
asm volatile("syscall"
: "=a"(result)
: "a"(function)
: "rcx", "r11", "memory");
# elif ARCH(AARCH64)
register uintptr_t x0 asm("x0");
register uintptr_t x8 asm("x8") = function;
asm volatile("svc #0"
: "=r"(x0)
: "r"(x8)
: "memory");
result = x0;
# endif
return result;
}
@ -510,11 +518,20 @@ inline uintptr_t invoke(Function function, T1 arg1)
: "=a"(result)
: "a"(function), "d"((uintptr_t)arg1)
: "memory");
# else
# elif ARCH(X86_64)
asm volatile("syscall"
: "=a"(result)
: "a"(function), "d"((uintptr_t)arg1)
: "rcx", "r11", "memory");
# else
register uintptr_t x0 asm("x0");
register uintptr_t x1 asm("x1") = arg1;
register uintptr_t x8 asm("x8") = function;
asm volatile("svc #0"
: "=r"(x0)
: "r"(x1), "r"(x8)
: "memory");
result = x0;
# endif
return result;
}
@ -528,11 +545,21 @@ inline uintptr_t invoke(Function function, T1 arg1, T2 arg2)
: "=a"(result)
: "a"(function), "d"((uintptr_t)arg1), "c"((uintptr_t)arg2)
: "memory");
# else
# elif ARCH(X86_64)
asm volatile("syscall"
: "=a"(result)
: "a"(function), "d"((uintptr_t)arg1), "D"((uintptr_t)arg2)
: "rcx", "r11", "memory");
# else
register uintptr_t x0 asm("x0");
register uintptr_t x1 asm("x1") = arg1;
register uintptr_t x2 asm("x2") = arg2;
register uintptr_t x8 asm("x8") = function;
asm volatile("svc #0"
: "=r"(x0)
: "r"(x1), "r"(x2), "r"(x8)
: "memory");
result = x0;
# endif
return result;
}
@ -546,11 +573,22 @@ inline uintptr_t invoke(Function function, T1 arg1, T2 arg2, T3 arg3)
: "=a"(result)
: "a"(function), "d"((uintptr_t)arg1), "c"((uintptr_t)arg2), "b"((uintptr_t)arg3)
: "memory");
# else
# elif ARCH(X86_64)
asm volatile("syscall"
: "=a"(result)
: "a"(function), "d"((uintptr_t)arg1), "D"((uintptr_t)arg2), "b"((uintptr_t)arg3)
: "rcx", "r11", "memory");
# else
register uintptr_t x0 asm("x0");
register uintptr_t x1 asm("x1") = arg1;
register uintptr_t x2 asm("x2") = arg2;
register uintptr_t x3 asm("x3") = arg3;
register uintptr_t x8 asm("x8") = function;
asm volatile("svc #0"
: "=r"(x0)
: "r"(x1), "r"(x2), "r"(x3), "r"(x8)
: "memory");
result = x0;
# endif
return result;
}
@ -564,11 +602,23 @@ inline uintptr_t invoke(Function function, T1 arg1, T2 arg2, T3 arg3, T4 arg4)
: "=a"(result)
: "a"(function), "d"((uintptr_t)arg1), "c"((uintptr_t)arg2), "b"((uintptr_t)arg3), "S"((uintptr_t)arg4)
: "memory");
# else
# elif ARCH(X86_64)
asm volatile("syscall"
: "=a"(result)
: "a"(function), "d"((uintptr_t)arg1), "D"((uintptr_t)arg2), "b"((uintptr_t)arg3), "S"((uintptr_t)arg4)
: "memory");
# else
register uintptr_t x0 asm("x0");
register uintptr_t x1 asm("x1") = arg1;
register uintptr_t x2 asm("x2") = arg2;
register uintptr_t x3 asm("x3") = arg3;
register uintptr_t x4 asm("x4") = arg4;
register uintptr_t x8 asm("x8") = function;
asm volatile("svc #0"
: "=r"(x0)
: "r"(x1), "r"(x2), "r"(x3), "r"(x4), "r"(x8)
: "memory");
result = x0;
# endif
return result;
}