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drop fast syscall dispatch for now

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Marvin
2026-09-25 17:36:26 +02:00
committed by Marvin Friedrich
parent 1dc41fe7ff
commit ff4362ca5b
1 changed files with 20 additions and 26 deletions
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syscalls/dispatch.c
+20 -26
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@@ -17,37 +17,31 @@ const struct syscall syscall_table[256] = {
#include <zinnia/syscall_list.inc>
};
// TODO: Implement this
[[gnu::no_caller_saved_registers]]
struct syscall_ret syscall_dispatch_fast(
uintptr_t a0,
uintptr_t a1,
uintptr_t a2,
uintptr_t a3,
uintptr_t a4,
uintptr_t a5,
size_t num
) {
// No need to check the table size here. In order to get to this point,
// we already have to check if this is a fast syscall.
if (syscall_table[num].func == nullptr) {
return (struct syscall_ret){.errno = ENOSYS};
}
struct syscall_ret (*func)(uintptr_t, uintptr_t, uintptr_t, uintptr_t, uintptr_t, uintptr_t) =
syscall_table[num].func;
return func(a0, a1, a2, a3, a4, a5);
}
void syscall_dispatch(struct arch_context* ctx) {
const size_t num = ctx->ARCH_CTX_NUM;
if (num >= ARRAY_SIZE(syscall_table) || syscall_table[num].func == nullptr) {
ctx->ARCH_CTX_RET0 = ENOSYS;
ctx->ARCH_CTX_RET1 = ENOSYS;
return;
}
void (*func)(struct arch_context* ctx) = syscall_table[num].func;
func(ctx);
struct syscall_ret ret;
if (syscall_table[num].num_args == -1) {
struct syscall_ret (*func)(struct arch_context*) = syscall_table[num].func;
ret = func(ctx);
} else {
struct syscall_ret (*func)(uintptr_t, uintptr_t, uintptr_t, uintptr_t, uintptr_t, uintptr_t) =
syscall_table[num].func;
ret = func(
ctx->ARCH_CTX_A0,
ctx->ARCH_CTX_A1,
ctx->ARCH_CTX_A2,
ctx->ARCH_CTX_A3,
ctx->ARCH_CTX_A4,
ctx->ARCH_CTX_A5
);
}
ctx->ARCH_CTX_RET0 = ret.value;
ctx->ARCH_CTX_RET1 = ret.errno;
}