Re: [Crash-utility] [PATCH] add arm support for libgcore

[Dave Anderson]

----- Original Message -----
> Hello Lei,
> 
> Thanks for making patch. I'll check your patch this week, but I have
> two things to ask you.
> 
> 1. I don't know arm architecture at all and I don't have arm
> machine. What I can do is only testing common part and regression test
> on x86 architecture. Please maintain arm part yourself.
> 
> 2. Could you tell me specific kernel versions you have tested this
> patch in? I myself have yet to do this, but now I think it necessary
> to make such a list. I imagine just like makedumpfile's SUPPORTED
> KERNELS described in its README. I'll put them in gcore's README and
> then ask Dave to add them into description in distribution page.

Hello Daisuke,

Please also note that I have changed the downloadable file on the
crash extension modules web page to crash-gcore-command-1.0.tar.gz
from the older gcore.tar.bz2.  Keeping a versioned package will
make our maintenance chores a bit easier.  

Also, when the package is compiled from within an rpmbuild framework
using $(RPM_OPT_FLAGS), the gcore_get_regs_from_bt_output() function
generates a compiler warning.  I've attached a patch for that.

Thanks,
  Dave 


> HATAYAMA, Daisuke
> 
> From: Lei Wen <adrian.w...@gmail.com>
> Subject: [Crash-utility] [PATCH] add arm support for libgcore
> Date: Mon, 13 Feb 2012 09:32:34 +0800
> 
> > Hi,
> > 
> > Current the crash utility has the support for extracting core dump
> > image from original kdump file:
> > http://people.redhat.com/anderson/extensions/gcore_help_gcore.html
> > 
> > But it only supports x86 and x86_64 now.
> > I add one supporting patch to port it to ARM and another fix a minor
> > bug in original implementation.
> > 
> > Best regards,
> > Lei

--- crash-gcore-command-1.0/gcore.mk.orig
+++ crash-gcore-command-1.0/gcore.mk
@@ -66,11 +66,11 @@ gcore.so: gcore.c $(INCDIR)/defs.h
 		echo "gcore: architecture not supported"; \
 	else \
 		make -f gcore.mk $(GCORE_OFILES) && \
-		gcc $(CFLAGS) $(TARGET_CFLAGS) $(COMMON_CFLAGS) -nostartfiles -shared -rdynamic $(GCORE_OFILES) -o $@ $< ; \
+		gcc $(RPM_OPT_FLAGS) $(CFLAGS) $(TARGET_CFLAGS) $(COMMON_CFLAGS) -nostartfiles -shared -rdynamic $(GCORE_OFILES) -o $@ $< ; \
 	fi;
 
 %.o: %.c $(INCDIR)/defs.h
-	gcc $(CFLAGS) $(TARGET_CFLAGS) $(COMMON_CFLAGS) -c -o $@ $<
+	gcc $(RPM_OPT_FLAGS) $(CFLAGS) $(TARGET_CFLAGS) $(COMMON_CFLAGS) -c -o $@ $<
 
 clean:
 	find ./libgcore -regex ".+\(o\|so\)" -exec rm -f {} \;
--- crash-gcore-command-1.0/libgcore/gcore_x86.c.orig
+++ crash-gcore-command-1.0/libgcore/gcore_x86.c
@@ -1434,23 +1434,24 @@ static int
 gcore_get_regs_from_bt_output(FILE *output, struct user_regs_struct *regs)
 {
 	char buf[BUFSIZE];
+	int items __attribute__ ((__unused__));
 
 	if (gcore_find_regs_from_bt_output(output, buf, BUFSIZE) == FALSE)
 		return FALSE;
 
-	sscanf(buf, "    RIP: %016lx  RSP: %016lx  RFLAGS: %08lx\n",
+	items = sscanf(buf, "    RIP: %016lx  RSP: %016lx  RFLAGS: %08lx\n",
 	       &regs->ip, &regs->sp, &regs->flags);
-	fscanf(output, "    RAX: %016lx  RBX: %016lx  RCX: %016lx\n",
+	items = fscanf(output, "    RAX: %016lx  RBX: %016lx  RCX: %016lx\n",
 	       &regs->ax, &regs->bx, &regs->cx);
-	fscanf(output, "    RDX: %016lx  RSI: %016lx  RDI: %016lx\n",
+	items = fscanf(output, "    RDX: %016lx  RSI: %016lx  RDI: %016lx\n",
 	       &regs->dx, &regs->si, &regs->di);
-	fscanf(output, "    RBP: %016lx   R8: %016lx   R9: %016lx\n",
+	items = fscanf(output, "    RBP: %016lx   R8: %016lx   R9: %016lx\n",
 	       &regs->bp, &regs->r8, &regs->r9);
-	fscanf(output, "    R10: %016lx  R11: %016lx  R12: %016lx\n",
+	items = fscanf(output, "    R10: %016lx  R11: %016lx  R12: %016lx\n",
 	       &regs->r10, &regs->r11, &regs->r12);
-	fscanf(output, "    R13: %016lx  R14: %016lx  R15: %016lx\n",
+	items = fscanf(output, "    R13: %016lx  R14: %016lx  R15: %016lx\n",
 	       &regs->r13, &regs->r14, &regs->r15);
-	fscanf(output, "    ORIG_RAX: %016lx  CS: %04lx  SS: %04lx\n",
+	items = fscanf(output, "    ORIG_RAX: %016lx  CS: %04lx  SS: %04lx\n",
 	       &regs->orig_ax, &regs->cs, &regs->ss);
 
 	return TRUE;

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