From 1616d034b61622836d3a36af53dcfca7624c844e Mon Sep 17 00:00:00 2001
From: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
Date: Wed, 19 Dec 2018 19:03:12 -0200
Subject: [PATCH] Print cache size and geometry auxv types on LD_SHOW_AUXV=1
Add support for AT_L1I_CACHESIZE, AT_L1I_CACHEGEOMETRY,
AT_L1D_CACHESIZE, AT_L1D_CACHEGEOMETRY, AT_L2_CACHESIZE,
AT_L2_CACHEGEOMETRY, AT_L3_CACHESIZE and AT_L3_CACHEGEOMETRY when
LD_SHOW_AUXV=1.
AT_L*_CACHESIZE is printed as decimal and represent the number of
bytes of the cache.
AT_L*_CACHEGEOMETRY is treated in order to specify the cache line size
and its associativity.
Example output from a POWER8:
AT_L1I_CACHESIZE: 32768
AT_L1I_CACHEGEOMETRY: 128B line size, 8-way set associative
AT_L1D_CACHESIZE: 65536
AT_L1D_CACHEGEOMETRY: 128B line size, 8-way set associative
AT_L2_CACHESIZE: 524288
AT_L2_CACHEGEOMETRY: 128B line size, 8-way set associative
AT_L3_CACHESIZE: 8388608
AT_L3_CACHEGEOMETRY: 128B line size, 8-way set associative
Some of the new types are longer than the previous ones, requiring to
increase the indentation in order to keep the values aligned.
* elf/dl-sysdep.c (auxvars): Add AT_L1I_CACHESIZE,
AT_L1I_CACHEGEOMETRY, AT_L1D_CACHESIZE, AT_L1D_CACHEGEOMETRY,
AT_L2_CACHESIZE, AT_L2_CACHEGEOMETRY, AT_L3_CACHESIZE and
AT_L3_CACHEGEOMETRY. Fix indentation when printing the other
fields.
(_dl_show_auxv): Give a special treatment to
AT_L1I_CACHEGEOMETRY, AT_L1D_CACHEGEOMETRY, AT_L2_CACHEGEOMETRY
and AT_L3_CACHEGEOMETRY.
* sysdeps/powerpc/dl-procinfo.h (cache_geometry): New function.
(_dl_procinfo): Fix indentation when printing AT_HWCAP and
AT_HWCAP2. Add support for AT_L1I_CACHEGEOMETRY,
AT_L1D_CACHEGEOMETRY, AT_L2_CACHEGEOMETRY and AT_L3_CACHEGEOMETRY.
Signed-off-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
UPDATE:
Backported to glibc 2.28
Signed-off-by: Jair Gonzalez <jair.de.jesus.gonzalez.plascencia@intel.com>
---
ChangeLog | 15 ++++++++
elf/dl-sysdep.c | 68 ++++++++++++++++++++---------------
sysdeps/powerpc/dl-procinfo.h | 55 ++++++++++++++++++++++++++--
3 files changed, 107 insertions(+), 31 deletions(-)
diff --git a/ChangeLog b/ChangeLog
index e1f1e8ed..305a772b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,18 @@
+2018-12-19 Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
+
+ * elf/dl-sysdep.c (auxvars): Add AT_L1I_CACHESIZE,
+ AT_L1I_CACHEGEOMETRY, AT_L1D_CACHESIZE, AT_L1D_CACHEGEOMETRY,
+ AT_L2_CACHESIZE, AT_L2_CACHEGEOMETRY, AT_L3_CACHESIZE and
+ AT_L3_CACHEGEOMETRY. Fix indentation when printing the other
+ fields.
+ (_dl_show_auxv): Give a special treatment to
+ AT_L1I_CACHEGEOMETRY, AT_L1D_CACHEGEOMETRY, AT_L2_CACHEGEOMETRY
+ and AT_L3_CACHEGEOMETRY.
+ * sysdeps/powerpc/dl-procinfo.h (cache_geometry): New function.
+ (_dl_procinfo): Fix indentation when printing AT_HWCAP and
+ AT_HWCAP2. Add support for AT_L1I_CACHEGEOMETRY,
+ AT_L1D_CACHEGEOMETRY, AT_L2_CACHEGEOMETRY and AT_L3_CACHEGEOMETRY.
+
2018-08-20 Joseph Myers <joseph@codesourcery.com>
* elf/elf.c (NT_VMCOREDD): New macro.
diff --git a/elf/dl-sysdep.c b/elf/dl-sysdep.c
index 998c5d52..93983251 100644
--- a/elf/dl-sysdep.c
+++ b/elf/dl-sysdep.c
@@ -277,38 +277,46 @@ _dl_show_auxv (void)
{
static const struct
{
- const char label[17];
+ const char label[22];
enum { unknown = 0, dec, hex, str, ignore } form : 8;
} auxvars[] =
{
- [AT_EXECFD - 2] = { "EXECFD: ", dec },
- [AT_EXECFN - 2] = { "EXECFN: ", str },
- [AT_PHDR - 2] = { "PHDR: 0x", hex },
- [AT_PHENT - 2] = { "PHENT: ", dec },
- [AT_PHNUM - 2] = { "PHNUM: ", dec },
- [AT_PAGESZ - 2] = { "PAGESZ: ", dec },
- [AT_BASE - 2] = { "BASE: 0x", hex },
- [AT_FLAGS - 2] = { "FLAGS: 0x", hex },
- [AT_ENTRY - 2] = { "ENTRY: 0x", hex },
- [AT_NOTELF - 2] = { "NOTELF: ", hex },
- [AT_UID - 2] = { "UID: ", dec },
- [AT_EUID - 2] = { "EUID: ", dec },
- [AT_GID - 2] = { "GID: ", dec },
- [AT_EGID - 2] = { "EGID: ", dec },
- [AT_PLATFORM - 2] = { "PLATFORM: ", str },
- [AT_HWCAP - 2] = { "HWCAP: ", hex },
- [AT_CLKTCK - 2] = { "CLKTCK: ", dec },
- [AT_FPUCW - 2] = { "FPUCW: ", hex },
- [AT_DCACHEBSIZE - 2] = { "DCACHEBSIZE: 0x", hex },
- [AT_ICACHEBSIZE - 2] = { "ICACHEBSIZE: 0x", hex },
- [AT_UCACHEBSIZE - 2] = { "UCACHEBSIZE: 0x", hex },
+ [AT_EXECFD - 2] = { "EXECFD: ", dec },
+ [AT_EXECFN - 2] = { "EXECFN: ", str },
+ [AT_PHDR - 2] = { "PHDR: 0x", hex },
+ [AT_PHENT - 2] = { "PHENT: ", dec },
+ [AT_PHNUM - 2] = { "PHNUM: ", dec },
+ [AT_PAGESZ - 2] = { "PAGESZ: ", dec },
+ [AT_BASE - 2] = { "BASE: 0x", hex },
+ [AT_FLAGS - 2] = { "FLAGS: 0x", hex },
+ [AT_ENTRY - 2] = { "ENTRY: 0x", hex },
+ [AT_NOTELF - 2] = { "NOTELF: ", hex },
+ [AT_UID - 2] = { "UID: ", dec },
+ [AT_EUID - 2] = { "EUID: ", dec },
+ [AT_GID - 2] = { "GID: ", dec },
+ [AT_EGID - 2] = { "EGID: ", dec },
+ [AT_PLATFORM - 2] = { "PLATFORM: ", str },
+ [AT_HWCAP - 2] = { "HWCAP: ", hex },
+ [AT_CLKTCK - 2] = { "CLKTCK: ", dec },
+ [AT_FPUCW - 2] = { "FPUCW: ", hex },
+ [AT_DCACHEBSIZE - 2] = { "DCACHEBSIZE: 0x", hex },
+ [AT_ICACHEBSIZE - 2] = { "ICACHEBSIZE: 0x", hex },
+ [AT_UCACHEBSIZE - 2] = { "UCACHEBSIZE: 0x", hex },
[AT_IGNOREPPC - 2] = { "IGNOREPPC", ignore },
- [AT_SECURE - 2] = { "SECURE: ", dec },
- [AT_BASE_PLATFORM - 2] = { "BASE_PLATFORM:", str },
- [AT_SYSINFO - 2] = { "SYSINFO: 0x", hex },
- [AT_SYSINFO_EHDR - 2] = { "SYSINFO_EHDR: 0x", hex },
- [AT_RANDOM - 2] = { "RANDOM: 0x", hex },
- [AT_HWCAP2 - 2] = { "HWCAP2: 0x", hex },
+ [AT_SECURE - 2] = { "SECURE: ", dec },
+ [AT_BASE_PLATFORM - 2] = { "BASE_PLATFORM: ", str },
+ [AT_SYSINFO - 2] = { "SYSINFO: 0x", hex },
+ [AT_SYSINFO_EHDR - 2] = { "SYSINFO_EHDR: 0x", hex },
+ [AT_RANDOM - 2] = { "RANDOM: 0x", hex },
+ [AT_HWCAP2 - 2] = { "HWCAP2: 0x", hex },
+ [AT_L1I_CACHESIZE - 2] = { "L1I_CACHESIZE: ", dec },
+ [AT_L1I_CACHEGEOMETRY - 2] = { "L1I_CACHEGEOMETRY: 0x", hex },
+ [AT_L1D_CACHESIZE - 2] = { "L1D_CACHESIZE: ", dec },
+ [AT_L1D_CACHEGEOMETRY - 2] = { "L1D_CACHEGEOMETRY: 0x", hex },
+ [AT_L2_CACHESIZE - 2] = { "L2_CACHESIZE: ", dec },
+ [AT_L2_CACHEGEOMETRY - 2] = { "L2_CACHEGEOMETRY: 0x", hex },
+ [AT_L3_CACHESIZE - 2] = { "L3_CACHESIZE: ", dec },
+ [AT_L3_CACHEGEOMETRY - 2] = { "L3_CACHEGEOMETRY: 0x", hex },
};
unsigned int idx = (unsigned int) (av->a_type - 2);
@@ -320,7 +328,9 @@ _dl_show_auxv (void)
assert (AT_NULL == 0);
assert (AT_IGNORE == 1);
- if (av->a_type == AT_HWCAP || av->a_type == AT_HWCAP2)
+ if (av->a_type == AT_HWCAP || av->a_type == AT_HWCAP2
+ || AT_L1I_CACHEGEOMETRY || AT_L1D_CACHEGEOMETRY
+ || AT_L2_CACHEGEOMETRY || AT_L3_CACHEGEOMETRY)
{
/* These are handled in a special way per platform. */
if (_dl_procinfo (av->a_type, av->a_un.a_val) == 0)
diff --git a/sysdeps/powerpc/dl-procinfo.h b/sysdeps/powerpc/dl-procinfo.h
index 3593e966..8d8ffb69 100644
--- a/sysdeps/powerpc/dl-procinfo.h
+++ b/sysdeps/powerpc/dl-procinfo.h
@@ -157,6 +157,37 @@ _dl_string_platform (const char *str)
}
#if IS_IN (rtld)
+static inline void
+cache_geometry (const char * name, unsigned long int geometry)
+{
+ unsigned long int assocty, line;
+
+ _dl_printf ("%s", name);
+
+ line = geometry & 0xffff;
+ assocty = (geometry >> 16) & 0xffff;
+
+ if (line == 0)
+ _dl_printf ("Unknown line size, ");
+ else
+ _dl_printf ("%luB line size, ", line);
+
+ switch (assocty)
+ {
+ case 0:
+ _dl_printf ("Unknown associativity");
+ break;
+ case 1:
+ _dl_printf ("Directly mapped");
+ break;
+ case 0xffff:
+ _dl_printf ("Fully associative");
+ break;
+ default:
+ _dl_printf ("%lu-way set associative", assocty);
+ }
+}
+
static inline int
__attribute__ ((unused))
_dl_procinfo (unsigned int type, unsigned long int word)
@@ -164,7 +195,7 @@ _dl_procinfo (unsigned int type, unsigned long int word)
switch(type)
{
case AT_HWCAP:
- _dl_printf ("AT_HWCAP: ");
+ _dl_printf ("AT_HWCAP: ");
for (int i = 0; i <= _DL_HWCAP_LAST; ++i)
if (word & (1 << i))
@@ -174,7 +205,7 @@ _dl_procinfo (unsigned int type, unsigned long int word)
{
unsigned int offset = _DL_HWCAP_LAST + 1;
- _dl_printf ("AT_HWCAP2: ");
+ _dl_printf ("AT_HWCAP2: ");
/* We have to go through them all because the kernel added the
AT_HWCAP2 features starting with the high bits. */
@@ -183,6 +214,26 @@ _dl_procinfo (unsigned int type, unsigned long int word)
_dl_printf (" %s", _dl_hwcap_string (offset + i));
break;
}
+ case AT_L1I_CACHEGEOMETRY:
+ {
+ cache_geometry ("AT_L1I_CACHEGEOMETRY: ", word);
+ break;
+ }
+ case AT_L1D_CACHEGEOMETRY:
+ {
+ cache_geometry ("AT_L1D_CACHEGEOMETRY: ", word);
+ break;
+ }
+ case AT_L2_CACHEGEOMETRY:
+ {
+ cache_geometry ("AT_L2_CACHEGEOMETRY: ", word);
+ break;
+ }
+ case AT_L3_CACHEGEOMETRY:
+ {
+ cache_geometry ("AT_L3_CACHEGEOMETRY: ", word);
+ break;
+ }
default:
/* This should not happen. */
return -1;
--
2.27.0