diff options
Diffstat (limited to 'sys/riscv/riscv/db_interface.c')
| -rw-r--r-- | sys/riscv/riscv/db_interface.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/sys/riscv/riscv/db_interface.c b/sys/riscv/riscv/db_interface.c new file mode 100644 index 0000000..b9f391a --- /dev/null +++ b/sys/riscv/riscv/db_interface.c @@ -0,0 +1,163 @@ +/*- + * Copyright (c) 2015 The FreeBSD Foundation + * All rights reserved. + * + * This software was developed by Semihalf under + * the sponsorship of the FreeBSD Foundation. + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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/cdefs.h> +__FBSDID("$FreeBSD$"); +#include <sys/param.h> +#include <sys/proc.h> +#include <vm/vm.h> +#include <vm/pmap.h> +#include <vm/vm_map.h> + +#ifdef KDB +#include <sys/kdb.h> +#endif + +#include <ddb/ddb.h> +#include <ddb/db_variables.h> + +#include <machine/cpu.h> +#include <machine/pcb.h> +#include <machine/stack.h> +#include <machine/vmparam.h> + +static int +db_frame(struct db_variable *vp, db_expr_t *valuep, int op) +{ + long *reg; + + if (kdb_frame == NULL) + return (0); + + reg = (long *)((uintptr_t)kdb_frame + (db_expr_t)vp->valuep); + if (op == DB_VAR_GET) + *valuep = *reg; + else + *reg = *valuep; + return (1); +} + +#define DB_OFFSET(x) (db_expr_t *)offsetof(struct trapframe, x) +struct db_variable db_regs[] = { + { "ra", DB_OFFSET(tf_ra), db_frame }, + { "sp", DB_OFFSET(tf_sp), db_frame }, + { "gp", DB_OFFSET(tf_gp), db_frame }, + { "tp", DB_OFFSET(tf_tp), db_frame }, + { "t0", DB_OFFSET(tf_t[0]), db_frame }, + { "t1", DB_OFFSET(tf_t[1]), db_frame }, + { "t2", DB_OFFSET(tf_t[2]), db_frame }, + { "t3", DB_OFFSET(tf_t[3]), db_frame }, + { "t4", DB_OFFSET(tf_t[4]), db_frame }, + { "t5", DB_OFFSET(tf_t[5]), db_frame }, + { "t6", DB_OFFSET(tf_t[6]), db_frame }, + { "s0", DB_OFFSET(tf_s[0]), db_frame }, + { "s1", DB_OFFSET(tf_s[1]), db_frame }, + { "s2", DB_OFFSET(tf_s[2]), db_frame }, + { "s3", DB_OFFSET(tf_s[3]), db_frame }, + { "s4", DB_OFFSET(tf_s[4]), db_frame }, + { "s5", DB_OFFSET(tf_s[5]), db_frame }, + { "s6", DB_OFFSET(tf_s[6]), db_frame }, + { "s7", DB_OFFSET(tf_s[7]), db_frame }, + { "s8", DB_OFFSET(tf_s[8]), db_frame }, + { "s9", DB_OFFSET(tf_s[9]), db_frame }, + { "s10", DB_OFFSET(tf_s[10]), db_frame }, + { "s11", DB_OFFSET(tf_s[11]), db_frame }, + { "a0", DB_OFFSET(tf_a[0]), db_frame }, + { "a1", DB_OFFSET(tf_a[1]), db_frame }, + { "a2", DB_OFFSET(tf_a[2]), db_frame }, + { "a3", DB_OFFSET(tf_a[3]), db_frame }, + { "a4", DB_OFFSET(tf_a[4]), db_frame }, + { "a5", DB_OFFSET(tf_a[5]), db_frame }, + { "a6", DB_OFFSET(tf_a[6]), db_frame }, + { "a7", DB_OFFSET(tf_a[7]), db_frame }, + { "sepc", DB_OFFSET(tf_sepc), db_frame }, + { "sstatus", DB_OFFSET(tf_sstatus), db_frame }, + { "sbadaddr", DB_OFFSET(tf_sbadaddr), db_frame }, + { "scause", DB_OFFSET(tf_scause), db_frame }, +}; + +struct db_variable *db_eregs = db_regs + nitems(db_regs); + +void +db_show_mdpcpu(struct pcpu *pc) +{ +} + +/* + * Read bytes from kernel address space for debugger. + */ +int +db_read_bytes(vm_offset_t addr, size_t size, char *data) +{ + jmp_buf jb; + void *prev_jb; + const char *src; + int ret; + + prev_jb = kdb_jmpbuf(jb); + ret = setjmp(jb); + + if (ret == 0) { + src = (const char *)addr; + while (size-- > 0) + *data++ = *src++; + } + (void)kdb_jmpbuf(prev_jb); + + return (ret); +} + +/* + * Write bytes to kernel address space for debugger. + */ +int +db_write_bytes(vm_offset_t addr, size_t size, char *data) +{ + jmp_buf jb; + void *prev_jb; + char *dst; + int ret; + + prev_jb = kdb_jmpbuf(jb); + ret = setjmp(jb); + if (ret == 0) { + dst = (char *)addr; + while (size-- > 0) + *dst++ = *data++; + + fence(); + + /* Clean D-cache and invalidate I-cache */ + cpu_dcache_wb_range(addr, (vm_size_t)size); + cpu_icache_sync_range(addr, (vm_size_t)size); + } + (void)kdb_jmpbuf(prev_jb); + + return (ret); +} |
