diff options
| -rw-r--r-- | sys/arch/amd64/amd64/machdep.c | 2 | ||||
| -rw-r--r-- | sys/arch/amd64/amd64/syscall.S | 34 | ||||
| -rw-r--r-- | sys/arch/amd64/amd64/trap.c | 21 | ||||
| -rw-r--r-- | sys/include/sys/proc.h | 2 | ||||
| -rw-r--r-- | sys/include/sys/syscall.h | 132 | ||||
| -rw-r--r-- | sys/kern/kern_exit.c | 7 | ||||
| -rw-r--r-- | sys/kern/kern_syscall.c | 39 |
7 files changed, 237 insertions, 0 deletions
diff --git a/sys/arch/amd64/amd64/machdep.c b/sys/arch/amd64/amd64/machdep.c index 7099cd2..b047dd8 100644 --- a/sys/arch/amd64/amd64/machdep.c +++ b/sys/arch/amd64/amd64/machdep.c @@ -44,6 +44,7 @@ #endif int ibrs_enable(void); +void syscall_isr(void); struct cpu_info g_bsp_ci = {0}; static struct gdtr bsp_gdtr = { @@ -66,6 +67,7 @@ setup_vectors(void) idt_set_desc(0xC, IDT_TRAP_GATE, ISR(ss_fault), 0); idt_set_desc(0xD, IDT_TRAP_GATE, ISR(general_prot), 0); idt_set_desc(0xE, IDT_TRAP_GATE, ISR(page_fault), 0); + idt_set_desc(0x80, IDT_USER_INT_GATE, ISR(syscall_isr), 0); } static inline void diff --git a/sys/arch/amd64/amd64/syscall.S b/sys/arch/amd64/amd64/syscall.S new file mode 100644 index 0000000..42ee242 --- /dev/null +++ b/sys/arch/amd64/amd64/syscall.S @@ -0,0 +1,34 @@ +/* + * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Hyra nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <machine/frameasm.h> + + .text + .globl syscall_isr +INTRENTRY(syscall_isr, trap_syscall) diff --git a/sys/arch/amd64/amd64/trap.c b/sys/arch/amd64/amd64/trap.c index 2d479ee..7b866d8 100644 --- a/sys/arch/amd64/amd64/trap.c +++ b/sys/arch/amd64/amd64/trap.c @@ -32,11 +32,14 @@ #include <sys/reboot.h> #include <sys/panic.h> #include <sys/syslog.h> +#include <sys/syscall.h> #include <machine/trap.h> #include <machine/frame.h> #define pr_error(fmt, ...) kprintf("trap: " fmt, ##__VA_ARGS__) +void trap_syscall(struct trapframe *tf); + static const char *trap_type[] = { [TRAP_BREAKPOINT] = "breakpoint", [TRAP_ARITH_ERR] = "arithmetic error", @@ -83,6 +86,24 @@ regdump(struct trapframe *tf) } void +trap_syscall(struct trapframe *tf) +{ + struct syscall_args scargs = { + .arg0 = tf->rdi, + .arg1 = tf->rsi, + .arg2 = tf->rdx, + .arg3 = tf->r10, + .arg4 = tf->r9, + .arg5 = tf->r8, + .tf = tf + }; + + if (tf->rax < MAX_SYSCALLS && tf->rax > 0) { + tf->rax = g_sctab[tf->rax](&scargs); + } +} + +void trap_handler(struct trapframe *tf) { if (tf->trapno >= NELEM(trap_type)) { diff --git a/sys/include/sys/proc.h b/sys/include/sys/proc.h index ceeb5e4..f168072 100644 --- a/sys/include/sys/proc.h +++ b/sys/include/sys/proc.h @@ -35,6 +35,7 @@ #include <sys/queue.h> #include <sys/param.h> #include <sys/cdefs.h> +#include <sys/syscall.h> #if defined(_KERNEL) #include <machine/frame.h> #include <machine/pcb.h> @@ -67,6 +68,7 @@ __dead void md_td_kick(struct proc *td); int fork1(struct proc *cur, int flags, void(*ip)(void), struct proc **newprocp); int exit1(struct proc *td); +__dead scret_t sys_exit(struct syscall_args *scargs); #endif /* _KERNEL */ #endif /* !_SYS_PROC_H_ */ diff --git a/sys/include/sys/syscall.h b/sys/include/sys/syscall.h new file mode 100644 index 0000000..ef93ae4 --- /dev/null +++ b/sys/include/sys/syscall.h @@ -0,0 +1,132 @@ +/* + * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Hyra nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _SYS_SYSCALL_H_ +#define _SYS_SYSCALL_H_ + +#if !defined(__ASSEMBLER__) +#include <sys/types.h> +#include <sys/cdefs.h> +#endif /* !__ASSEMBLER__ */ + +#define SYS_none 0 +#define SYS_exit 1 + +#if defined(_KERNEL) +/* Syscall return value and arg type */ +typedef ssize_t scret_t; +typedef ssize_t scarg_t; + +struct syscall_args { + scarg_t arg0; + scarg_t arg1; + scarg_t arg2; + scarg_t arg3; + scarg_t arg4; + scarg_t arg5; + scarg_t arg6; + struct trapframe *tf; +}; + +extern const size_t MAX_SYSCALLS; +extern scret_t(*g_sctab[])(struct syscall_args *); +#endif /* _KERNEL */ + +#if !defined(__ASSEMBLER__) +__always_inline static inline long +syscall0(uint64_t code) +{ + volatile long ret; + __ASMV("int $0x80" : "=a"(ret) : "a"(code)); + return ret; +} + +__always_inline static inline long +syscall1(uint64_t code, uint64_t arg0) +{ + volatile long ret; + __ASMV("int $0x80" : "=a"(ret) : "a"(code), "D"(arg0) : "memory"); + return ret; +} + +__always_inline static long inline +syscall2(uint64_t code, uint64_t arg0, uint64_t arg1) +{ + volatile long ret; + __ASMV("int $0x80" : "=a"(ret) : "a"(code), "D"(arg0), "S"(arg1) : "memory"); + return ret; +} + +__always_inline static inline long +syscall3(uint64_t code, uint64_t arg0, uint64_t arg1, uint64_t arg2) +{ + volatile long ret; + __ASMV("int $0x80" : "=a"(ret) : "a"(code), "D"(arg0), "S"(arg1), "d"(arg2) : "memory"); + return ret; +} + +__always_inline static inline long +syscall4(uint64_t code, uint64_t arg0, uint64_t arg1, uint64_t arg2, uint64_t arg3) +{ + volatile long ret; + register uint64_t _arg3 asm("r10") = arg3; + __ASMV("int $0x80" : "=a"(ret) : "a"(code), "D"(arg0), "S"(arg1), "d"(arg2), "r"(_arg3) : "memory"); + return ret; +} + +__always_inline static inline long +syscall5(uint64_t code, uint64_t arg0, uint64_t arg1, uint64_t arg2, uint64_t arg3, uint64_t arg4) +{ + volatile long ret; + register uint64_t _arg3 asm("r10") = arg3; + register uint64_t _arg4 asm("r9") = arg4; + __ASMV("int $0x80" : "=a"(ret) : "a"(code), "D"(arg0), "S"(arg1), "d"(arg2), "r"(_arg3), "r"(_arg4) : "memory"); + return ret; +} + +__always_inline static inline long +syscall6(uint64_t code, uint64_t arg0, uint64_t arg1, uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5) { + volatile long ret; + register uint64_t _arg3 asm("r10") = arg3; + register uint64_t _arg4 asm("r9") = arg4; + register uint64_t _arg5 asm("r8") = arg5; + __ASMV("int $0x80" : "=a"(ret) : "a"(code), "D"(arg0), "S"(arg1), "d"(arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5) : "memory"); + return ret; +} + +#define _SYSCALL_N(a0, a1, a2, a3, a4, a5, a6, name, ...) \ + name + +#define syscall(...) \ +_SYSCALL_N(__VA_ARGS__, syscall6, syscall5, \ + syscall4, syscall3, syscall2, syscall1, \ + syscall0)(__VA_ARGS__) + +#endif /* !__ASSEMBLER__ */ +#endif /* _SYS_SYSCALL_H_ */ diff --git a/sys/kern/kern_exit.c b/sys/kern/kern_exit.c index 9995f51..04490b0 100644 --- a/sys/kern/kern_exit.c +++ b/sys/kern/kern_exit.c @@ -76,3 +76,10 @@ exit1(struct proc *td) return 0; } + +scret_t +sys_exit(struct syscall_args *scargs) +{ + exit1(this_td()); + __builtin_unreachable(); +} diff --git a/sys/kern/kern_syscall.c b/sys/kern/kern_syscall.c new file mode 100644 index 0000000..1a750cc --- /dev/null +++ b/sys/kern/kern_syscall.c @@ -0,0 +1,39 @@ +/* + * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Hyra nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/syscall.h> +#include <sys/types.h> +#include <sys/proc.h> + +scret_t(*g_sctab[])(struct syscall_args *) = { + NULL, /* SYS_none */ + sys_exit, /* SYS_exit */ +}; + +const size_t MAX_SYSCALLS = NELEM(g_sctab); |