diff options
author | marcel <marcel@FreeBSD.org> | 2006-08-24 21:53:49 +0000 |
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committer | marcel <marcel@FreeBSD.org> | 2006-08-24 21:53:49 +0000 |
commit | 693fc69022f57293482a7ca54750082e79afdc17 (patch) | |
tree | 741325873456ceeb442a335eb2d7dc315ba381c1 /gnu/usr.bin | |
parent | 3aec95aaacc8856709424c90d8b1686e45d260a8 (diff) | |
download | FreeBSD-src-693fc69022f57293482a7ca54750082e79afdc17.zip FreeBSD-src-693fc69022f57293482a7ca54750082e79afdc17.tar.gz |
Add initial support for kgdb(1) on PowerPC.
Diffstat (limited to 'gnu/usr.bin')
-rw-r--r-- | gnu/usr.bin/gdb/Makefile | 6 | ||||
-rw-r--r-- | gnu/usr.bin/gdb/kgdb/trgt_powerpc.c | 185 |
2 files changed, 186 insertions, 5 deletions
diff --git a/gnu/usr.bin/gdb/Makefile b/gnu/usr.bin/gdb/Makefile index 8eabacb..74a3598 100644 --- a/gnu/usr.bin/gdb/Makefile +++ b/gnu/usr.bin/gdb/Makefile @@ -1,9 +1,5 @@ # $FreeBSD$ -SUBDIR= doc libgdb gdb gdbtui - -.if ${MACHINE_ARCH} != "powerpc" -SUBDIR+= kgdb -.endif +SUBDIR= doc libgdb gdb gdbtui kgdb .include <bsd.subdir.mk> diff --git a/gnu/usr.bin/gdb/kgdb/trgt_powerpc.c b/gnu/usr.bin/gdb/kgdb/trgt_powerpc.c new file mode 100644 index 0000000..8ca07b4 --- /dev/null +++ b/gnu/usr.bin/gdb/kgdb/trgt_powerpc.c @@ -0,0 +1,185 @@ +/*- + * Copyright (c) 2006 Marcel Moolenaar + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <machine/pcb.h> +#include <machine/frame.h> +#include <err.h> +#include <kvm.h> +#include <string.h> + +#include <defs.h> +#include <target.h> +#include <gdbthread.h> +#include <inferior.h> +#include <regcache.h> +#include <frame-unwind.h> +#include <ppc-tdep.h> + +#include "kgdb.h" + +void +kgdb_trgt_fetch_registers(int regno __unused) +{ + struct kthr *kt; + struct pcb pcb; + struct gdbarch_tdep *tdep; + int i; + + tdep = gdbarch_tdep (current_gdbarch); + + kt = kgdb_thr_lookup_tid(ptid_get_tid(inferior_ptid)); + if (kt == NULL) + return; + if (kvm_read(kvm, kt->pcb, &pcb, sizeof(pcb)) != sizeof(pcb)) { + warnx("kvm_read: %s", kvm_geterr(kvm)); + memset(&pcb, 0, sizeof(pcb)); + } + + /* + * r14-r31 are saved in the pcb + */ + for (i = 14; i <= 31; i++) { + supply_register(tdep->ppc_gp0_regnum + i, + (char *)&pcb.pcb_context[i]); + } + + /* r1 is saved in the sp field */ + supply_register(tdep->ppc_gp0_regnum + 1, (char *)&pcb.pcb_sp); + + supply_register(tdep->ppc_lr_regnum, (char *)&pcb.pcb_lr); + supply_register(tdep->ppc_cr_regnum, (char *)&pcb.pcb_cr); +} + +void +kgdb_trgt_store_registers(int regno __unused) +{ + fprintf_unfiltered(gdb_stderr, "XXX: %s\n", __func__); +} + +struct kgdb_frame_cache { + CORE_ADDR pc; + CORE_ADDR sp; +}; + +static struct kgdb_frame_cache * +kgdb_trgt_frame_cache(struct frame_info *next_frame, void **this_cache) +{ + char buf[MAX_REGISTER_SIZE]; + struct kgdb_frame_cache *cache; + + cache = *this_cache; + if (cache == NULL) { + cache = FRAME_OBSTACK_ZALLOC(struct kgdb_frame_cache); + *this_cache = cache; + cache->pc = frame_func_unwind(next_frame); + frame_unwind_register(next_frame, SP_REGNUM, buf); + cache->sp = extract_unsigned_integer(buf, + register_size(current_gdbarch, SP_REGNUM)); + } + return (cache); +} + +static void +kgdb_trgt_trapframe_this_id(struct frame_info *next_frame, void **this_cache, + struct frame_id *this_id) +{ + struct kgdb_frame_cache *cache; + + cache = kgdb_trgt_frame_cache(next_frame, this_cache); + *this_id = frame_id_build(cache->sp, cache->pc); +} + +static void +kgdb_trgt_trapframe_prev_register(struct frame_info *next_frame, + void **this_cache, int regnum, int *optimizedp, enum lval_type *lvalp, + CORE_ADDR *addrp, int *realnump, void *valuep) +{ + char dummy_valuep[MAX_REGISTER_SIZE]; + struct gdbarch_tdep *tdep; + struct kgdb_frame_cache *cache; + int ofs, regsz; + + tdep = gdbarch_tdep(current_gdbarch); + regsz = register_size(current_gdbarch, regnum); + + if (valuep == NULL) + valuep = dummy_valuep; + memset(valuep, 0, regsz); + *optimizedp = 0; + *addrp = 0; + *lvalp = not_lval; + *realnump = -1; + + if (regnum >= tdep->ppc_gp0_regnum && + regnum <= tdep->ppc_gplast_regnum) + ofs = offsetof(struct trapframe, + fixreg[regnum - tdep->ppc_gp0_regnum]); + else if (regnum == tdep->ppc_lr_regnum) + ofs = offsetof(struct trapframe, lr); + else if (regnum == tdep->ppc_cr_regnum) + ofs = offsetof(struct trapframe, cr); + else if (regnum == tdep->ppc_xer_regnum) + ofs = offsetof(struct trapframe, xer); + else if (regnum == tdep->ppc_ctr_regnum) + ofs = offsetof(struct trapframe, ctr); + else if (regnum == PC_REGNUM) + ofs = offsetof(struct trapframe, srr0); + else + return; + + cache = kgdb_trgt_frame_cache(next_frame, this_cache); + *addrp = cache->sp + 8 + ofs; + *lvalp = lval_memory; + target_read_memory(*addrp, valuep, regsz); +} + +static const struct frame_unwind kgdb_trgt_trapframe_unwind = { + UNKNOWN_FRAME, + &kgdb_trgt_trapframe_this_id, + &kgdb_trgt_trapframe_prev_register +}; + +const struct frame_unwind * +kgdb_trgt_trapframe_sniffer(struct frame_info *next_frame) +{ + char *pname; + CORE_ADDR pc; + + pc = frame_pc_unwind(next_frame); + pname = NULL; + find_pc_partial_function(pc, &pname, NULL, NULL); + if (pname == NULL) + return (NULL); + if (strcmp(pname, "asttrapexit") == 0 || + strcmp(pname, "trapexit") == 0) + return (&kgdb_trgt_trapframe_unwind); + /* printf("%s: %llx =%s\n", __func__, pc, pname); */ + return (NULL); +} |