[Crash-utility] Fwd: [PATCH] crash: unwind with LKCD_KERNTYPES

----- "Cliff Wickman" <cpw(a)sgi.com&gt; wrote: > This patch enables stack unwind (on ia64) when using a kerntypes > file for a namelist. > > When using a kerntypes file, we have just the address of variable unw > and the definition of an unw structure. > > As you can see, I didn't change the indentation of the normal code. Nicely segregated. But instead of leaving the indentation screwed up, I just inserted a "goto verify" at the bottom of your if statement and put the label at the proper location. > Simple to do, but I didn't want to clutter this patch for a first > pass. With that in place, should I just take the patch for the next release, or did you have something else you want to add?

Dave > > --- > unwind.c | 34 ++++++++++++++++++++++++++++++++++ > 1 file changed, 34 insertions(+) > > Index: crash-4.0-7.6.ia64/unwind.c > =================================================================== > --- crash-4.0-7.6.ia64.orig/unwind.c > +++ crash-4.0-7.6.ia64/unwind.c > @@ -1395,10 +1395,43 @@ unwind_init_v2(void) > unwind_init_v3(void) > #endif > { > + int len; > struct gnu_request request, *req; > > req = &request; > > + if (LKCD_KERNTYPES()) { > + if ((len = STRUCT_SIZE("unw")) == 0) { > + error(WARNING, > + "cannot determine unw.tables offset; no struct unw\n"); > + machdep->flags |= UNW_OUT_OF_SYNC; > + return; > + } > + machdep->machspec->unw_tables_offset = > + MEMBER_OFFSET("unw", "tables"); > + if (MEMBER_EXISTS("unw", "r0")) > + machdep->flags |= UNW_R0; > + /* > + * no verification of save_order, sw_off, preg_index as > + * we're purely depending on the structure definition. > + */ > + if (MEMBER_EXISTS("unw", "pt_regs_offsets")) { > + machdep->machspec->unw_pt_regs_offsets = > + MEMBER_OFFSET("unw", "pt_regs_offsets") - > + machdep->machspec->unw_tables_offset; > + machdep->machspec->unw_kernel_table_offset = > + MEMBER_OFFSET("unw", "kernel_table") - > + machdep->machspec->unw_tables_offset; > + machdep->flags |= UNW_PTREGS; > + } > + if (!load_unw_table(CLEAR_SCRIPT_CACHE)) { > + error(WARNING, > + "unwind_init: cannot read kernel unw table\n"); > + machdep->flags |= UNW_OUT_OF_SYNC; > + } > + machdep->machspec->unw = (void *)&unw; > + /* fall to common structure size verifications */ > + } else { > if (get_symbol_type("unw", "tables", req) == TYPE_CODE_UNDEF) > { > /* > * KLUDGE ALERT: > @@ -1449,6 +1482,7 @@ unwind_init_v3(void) > > machdep->machspec->unw = (void *)&unw; > } > + } > > verify_common_struct("unw_frame_info", sizeof(struct > unw_frame_info)); > verify_common_struct("unw_table", sizeof(struct unw_table));