* hist.h (struct histogram)

	(histograms, num_histograms): New.
	* hist.c (find_histogram, find_histogram_for_pc)
	(read_histogram_header): New.
	(s_lowpc, s_highpc, lowpc, highpc, hist_num_bins)
	(hist_sample): Remove.
	(hist_read_rec): Use the above, and handle multiple
	histogram records with disjoint address ranges.
	(hist_write_hist): Support several histogram records.
	(scale_and_align_entries): Adjust for multiple histograms.
	(hist_assign_samples_1): New.
	(hist_assign_samples): Use the above.
	(hist_clip_symbol_address): New.
	* hist.h (hist_check_address)
	(hist_clip_symbol_address): Declare.
	* gmon_io.c (gmon_out_read, gmon_out_write): Adjust handling
	of legacy format for multiple histogram changes.
	* corefile.c (find_call): Check for core_text_space and
	clip symbol address range here.
	* vax.c	(vax_find_call): Don't check for
	core_text_space, or clip the symbol's address range here.
	Use hist_check_address to check call's target address.
	* sparc.c: Likewise.
	* tahoe.c: Likewise.
	* i386.c: Likewise.
	* mips.c: Likewise. Also use core_text_sect->vma as the base
	address for code accesses, just like other machine-specific
	routines do.
	* gprof.texi: Adjust for the new logic.

1 files changed, 23 insertions, 6 deletions

diff --git a/gprof/hist.h b/gprof/hist.h
index 96624c68b01..4ed69580aed 100644
--- a/gprof/hist.h
+++ b/gprof/hist.h
@@ -21,20 +21,37 @@ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
 #ifndef hist_h
 #define hist_h
 
-extern bfd_vma s_lowpc;		/* Lowpc from the profile file.  */
-extern bfd_vma s_highpc;	/* Highpc from the profile file.  */
-extern bfd_vma lowpc, highpc;	/* Range profiled, in UNIT's.  */
-extern unsigned int hist_num_bins; /* Number of histogram bins.  */
-extern int *hist_sample;	/* Code histogram.  */
+typedef struct histogram
+{
+  bfd_vma lowpc;
+  bfd_vma highpc;
+  unsigned int num_bins;
+  int *sample;           /* Histogram samples (shorts in the file!).  */
+} histogram;
+
+histogram *histograms;
+unsigned num_histograms;
 
 /* Scale factor converting samples to pc values:
    each sample covers HIST_SCALE bytes.  */
 extern double hist_scale;
 
-
 extern void hist_read_rec        (FILE *, const char *);
 extern void hist_write_hist      (FILE *, const char *);
 extern void hist_assign_samples  (void);
 extern void hist_print           (void);
 
+/* Checks if ADDRESS is within the range of addresses for which
+   we have histogram data.  Returns 1 if so and 0 otherwise.  */
+extern int hist_check_address (unsigned address);
+
+/* Given a range of addresses for a symbol, find a histogram record 
+   that intersects with this range, and clips the range to that
+   histogram record, modifying *P_LOWPC and *P_HIGHPC.
+   
+   If no intersection is found, *P_LOWPC and *P_HIGHPC will be set to
+   one unspecified value.  If more that one intersection is found,
+   an error is emitted.  */
+extern void hist_clip_symbol_address (bfd_vma *p_lowpc, bfd_vma *p_highpc);
+
 #endif /* hist_h */