51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
// SPDX-License-Identifier: ISC
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#include <zinnia/compiler.h>
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#include <zinnia/errno.h>
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#include <zinnia/print.h>
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#include <zinnia/sched.h>
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#include <zinnia/syscall.h>
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#include <zinnia/types.h>
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#include <zinnia/utils.h>
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#include <bits/sched.h>
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// Declare all syscalls.
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#define SYSCALL_DECLARE(number, name, num_args) extern void sys_##name(...);
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#include <zinnia/syscall_list.inc>
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#undef SYSCALL_DECLARE
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// Define them.
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const struct syscall syscall_table[256] = {
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#define SYSCALL_DECLARE(number, name, num_args) [number] = {sys_##name, num_args},
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#include <zinnia/syscall_list.inc>
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};
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void syscall_dispatch(struct arch_context* ctx) {
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const size_t num = ctx->ARCH_CTX_NUM;
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if (num >= ARRAY_SIZE(syscall_table) || syscall_table[num].func == nullptr) {
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ctx->ARCH_CTX_RET1 = ENOSYS;
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return;
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}
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struct syscall_ret ret;
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if (syscall_table[num].num_args == -1) {
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struct syscall_ret (*func)(struct arch_context*) = syscall_table[num].func;
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ret = func(ctx);
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} else {
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struct syscall_ret (*func)(uintptr_t, uintptr_t, uintptr_t, uintptr_t, uintptr_t, uintptr_t) =
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syscall_table[num].func;
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ret = func(
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ctx->ARCH_CTX_A0,
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ctx->ARCH_CTX_A1,
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ctx->ARCH_CTX_A2,
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ctx->ARCH_CTX_A3,
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ctx->ARCH_CTX_A4,
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ctx->ARCH_CTX_A5
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);
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}
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ctx->ARCH_CTX_RET0 = ret.value;
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ctx->ARCH_CTX_RET1 = ret.error;
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}
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