diff options
| -rw-r--r-- | sys/arch/amd64/Makefile | 8 | ||||
| -rw-r--r-- | sys/arch/amd64/cpu/trap.S | 11 | ||||
| -rw-r--r-- | sys/arch/amd64/os/os_panic.c | 58 | ||||
| -rw-r--r-- | sys/inc/kern/panic.h | 42 | ||||
| -rw-r--r-- | sys/inc/mu/panic.h | 47 | ||||
| -rw-r--r-- | sys/kern/kern_panic.c | 53 |
6 files changed, 210 insertions, 9 deletions
diff --git a/sys/arch/amd64/Makefile b/sys/arch/amd64/Makefile index 265948a..7c6c6c8 100644 --- a/sys/arch/amd64/Makefile +++ b/sys/arch/amd64/Makefile @@ -5,17 +5,23 @@ CC = LD = SYS_CFLAGS = ASMFILES = $(shell find . -name "*.S") +CFILES = $(shell find . -name "*.c") ASMOBJS = $(ASMFILES:.S=.S.o) +COBJ = $(CFILES:.c=.o) MISC_OFILES = $(shell find ../../ -name "*.o") .PHONY: all -all: $(ASMOBJS) +all: $(ASMOBJS) $(COBJ) $(LD) -Tconf/link.ld $(MISC_OFILES) -o ../../rv7 %.S.o: %.S $(PROMPT) " [AS] " $< $(CC) -c -I../../target/inc/ $(SYS_CFLAGS) $< -o $@ +%.o: %.c + $(PROMPT) " [CC] " $< + $(CC) -c -I../../target/inc/ -I../../inc/ $(SYS_CFLAGS) $< -o $@ + .PHONY: clean clean: rm $(MISC_OFILES) diff --git a/sys/arch/amd64/cpu/trap.S b/sys/arch/amd64/cpu/trap.S index 1761358..d3b9887 100644 --- a/sys/arch/amd64/cpu/trap.S +++ b/sys/arch/amd64/cpu/trap.S @@ -64,22 +64,17 @@ trapstr_tab: .text .globl trap_dispatch - .extern uart_write + .extern panic trap_dispatch: mov 0(%rdi), %rax /* Vector */ - push %rax /* Save it */ cmp $TRAPSTR_ENTRIES, %rax /* Too big? */ jg .unknown_trap /* Yeah... */ - lea error_header(%rip), %rdi /* Load the error header */ - call uart_puts /* Print it */ - - pop %rcx /* Get the vector number */ + mov %rax, %rcx /* Vector -> RCX */ lea trapstr_convtab(%rip), %rdi /* Load the base here */ leaq (%rdi, %rcx, 8), %rdi /* Scale by the vector */ mov (%rdi), %rdi /* Get the error string address */ - - call uart_puts + call panic retq .unknown_trap: lea error_unknown(%rip), %rdi diff --git a/sys/arch/amd64/os/os_panic.c b/sys/arch/amd64/os/os_panic.c new file mode 100644 index 0000000..cd55aac --- /dev/null +++ b/sys/arch/amd64/os/os_panic.c @@ -0,0 +1,58 @@ +/* + * Copyright (c) 2025 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 PURPKERNE + * 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; LKERNS 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 + * PKERNSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/types.h> +#include <mu/panic.h> + +void +mu_panic_preamble(void) +{ + static uint64_t sync = 0; + + asm volatile( + "cli\n\t" + "mov $1, %%rax\n\t" + "1:\n\t" + " pause\n\t" + " xchg %0, %%rax\n\t" + " or %%rax, %%rax\n\t" + " jnz 1b\n" + : + : "m" (sync) + : "memory" + ); +} + +void +mu_panic_hcf(void) +{ + for (;;) { + asm volatile("cli; hlt"); + } +} diff --git a/sys/inc/kern/panic.h b/sys/inc/kern/panic.h new file mode 100644 index 0000000..59963a3 --- /dev/null +++ b/sys/inc/kern/panic.h @@ -0,0 +1,42 @@ +/* + * Copyright (c) 2025 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 PURPKERNE + * 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; LKERNS 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 + * PKERNSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _KE_PANIC_H_ +#define _KE_PANIC_H_ 1 + +#include <sys/cdefs.h> +#include <lib/stdarg.h> + +/* + * Signal to the user that a fatal error has + * occured and the system needs to halt + */ +__dead void panic(const char *fmt, ...); + +#endif /* !_KE_PANIC_H_ */ diff --git a/sys/inc/mu/panic.h b/sys/inc/mu/panic.h new file mode 100644 index 0000000..b592fcc --- /dev/null +++ b/sys/inc/mu/panic.h @@ -0,0 +1,47 @@ +/* + * Copyright (c) 2025 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 PURPKERNE + * 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; LKERNS 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 + * PKERNSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _MU_PANIC_H_ +#define _MU_PANIC_H_ 1 + +#include <sys/types.h> + +/* + * Called as soon as a panic is invoked, prevents other + * processors from continuing and disables interrupts + */ +void mu_panic_preamble(void); + +/* + * Used internally by the panic function and implemented + * per architecture to bring the system to a halt. + */ +void mu_panic_hcf(void); + +#endif /* !_MU_PANIC_H_ */ diff --git a/sys/kern/kern_panic.c b/sys/kern/kern_panic.c new file mode 100644 index 0000000..d6beccb --- /dev/null +++ b/sys/kern/kern_panic.c @@ -0,0 +1,53 @@ +/* + * Copyright (c) 2025 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 PURPKERNE + * 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; LKERNS 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 + * PKERNSIBILITY OF SUCH DAMAGE. + */ + +#include <kern/panic.h> +#include <kern/serial.h> +#include <mu/panic.h> +#include <lib/string.h> +#include <lib/stdarg.h> +#include <lib/stdbool.h> + +void +panic(const char *fmt, ...) +{ + static bool lock = false; + static char buf[256]; + static va_list ap; + + mu_panic_preamble(); + va_start(ap, fmt); + + vsnprintf(buf, sizeof(buf), fmt, ap); + serial_write("panic: ", 7); + serial_write(buf, strlen(buf)); + + mu_panic_hcf(); + __builtin_unreachable(); +} |