From: jamal <hadi-fAAogVwAN2Kw5LPnMra/2Q@public.gmane.org>
To: Arnaldo Carvalho de Melo <acme-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: dwarves-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: Changing the word-size was: Re: eat your own dog food?
Date: Sat, 12 Jan 2008 13:08:41 -0500 [thread overview]
Message-ID: <1200161321.31540.10.camel@localhost> (raw)
In-Reply-To: <20080112172856.GD23567-f8uhVLnGfZaxAyOMLChx1axOck334EZe@public.gmane.org>
[-- Attachment #1: Type: text/plain, Size: 931 bytes --]
On Sat, 2008-12-01 at 15:28 -0200, Arnaldo Carvalho de Melo wrote:
> Now what seems to be the last thing to do is to follow typedefs and find
> unnamed structs, think about spinlock_t, socket_lock_t, etc.
>
Good stuff Arnaldo - updated local tree.
I should be able to test later today.
Dont know much about cmake, is it possible to check for elfutils version
and not depend on build_id if version < xxx?
This way i dont have to go out of my way to maintain my own versions of
elf utilities. I have to do the patch you sent earlier manually now. I
will remove it if you will fix cmake.
BTW, while perusing archs i managed i think to gather sufficiently
accurate info (;->) on the different alignments; i got lazy at the end,
but quiet a few are in the attached txt file incase you find them
useful. Double check sparc for example. I think most 64-bit hardware
looks consistent; the funnies are in 32-bit archs.
cheers,
jamal
[-- Attachment #2: eabis --]
[-- Type: text/plain, Size: 2823 bytes --]
MIPS EABI
=========
Sizes and alignments
--------------------
Type Size (bytes) Alignment (bytes)
char 1 1
short 2 2
int 4 4
unsigned 4 4
long 4 4 (32-bit mode)
8 8 (64-bit mode)
long long 8 8
float 4 4
double 8 8
pointers 4 4 (32-bit mode)
8 8 (64-bit mode)
* alignment within aggregates (structs and unions) is as above, with
padding added if needed
* aggregates have alignment equal to that of their most aligned
member
* aggregates have sizes which are a multiple of their alignment
ia32 Sizes and alignments
--------------------
Type Size (bytes) Alignment (bytes)
char 1 1
short 2 2
int 4 4
unsigned 4 4
long 4 4
long long 8 4
float 4 4
double 8 4
pointers 4 4
* alignment within aggregates (structs and unions) is as above, with
padding added if needed
* aggregates have alignment equal to that of their most aligned
member
* aggregates have sizes which are a multiple of their alignment
This may result in tail padding.
ia64 Sizes and alignments
--------------------
Type Size (bytes) Alignment (bytes)
char 1 1
short 2 2
int 4 4
unsigned 4 4
long 8 8
long long 8 8
float 4 4
double 8 8
pointers 8 8
* An entire structure or union object shall be aligned on the same
boundary as its most strictly aligned member.
* Each member shall be assigned to the lowest available offset with the
appropriate alignment. This may require internal padding, depending
on the previous member.
* A structure's size shall be increased, if necessary, to make it a
multiple of the alignment. This may require tail padding, depending
on the last member.
AMD 64
-------
Type Size (bytes) Alignment (bytes)
char 1 1
short 2 2
int 4 4
unsigned 4 4
long 4 4
8 8 (64-bit mode)
long long 8 4
8 8 (64-bit mode)
float 4 4
double 8 4
pointers 4 4
8 8 (64-bit mode)
powerpc - 32bit
Type Size (bytes) Alignment (bytes)
char 1 1
short 2 2
int 4 4
unsigned 4 4
long 4 4
long long 8 8
float 4 4
double 8 8
long double 16 16
pointers 4 4
powerpc - 64bit
Type Size (bytes) Alignment (bytes)
char 1 1
short 2 2
int 4 4
unsigned 4 4
long 8 8
long long 8 8
int128 16 16
float 4 4
double 8 8
long double 16 16
pointers 8 8
sparc:
Type Size (bytes) Alignment (bytes)
char 1 1
short 2 2
int 4 4
unsigned 4 4
long 4 4
long long 8 8
float 4 4
double 8 8
long double 16 8
pointers 4 4
s390:
------
Type Size (bytes) Alignment (bytes)
char 1 1
short 2 2
int 4 4
unsigned 4 4
long 4 4
long long 8 8
float 4 4
double 8 8
long double 16 16
pointers 4 4
s390-zseries
---------
next prev parent reply other threads:[~2008-01-12 18:08 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-10 12:42 eat your own dog food? jamal
2008-01-10 13:39 ` Arnaldo Carvalho de Melo
[not found] ` <20080110133926.GF22437-f8uhVLnGfZaxAyOMLChx1axOck334EZe@public.gmane.org>
2008-01-10 13:55 ` jamal
2008-01-10 14:06 ` Arnaldo Carvalho de Melo
[not found] ` <20080110140635.GG22437-f8uhVLnGfZaxAyOMLChx1axOck334EZe@public.gmane.org>
2008-01-10 16:39 ` Arnaldo Carvalho de Melo
[not found] ` <20080110163959.GJ22437-f8uhVLnGfZaxAyOMLChx1axOck334EZe@public.gmane.org>
2008-01-10 21:37 ` jamal
2008-01-10 21:44 ` Arnaldo Carvalho de Melo
[not found] ` <20080110214438.GT22437-f8uhVLnGfZaxAyOMLChx1axOck334EZe@public.gmane.org>
2008-01-11 0:45 ` jamal
2008-01-11 1:04 ` jamal
2008-01-10 21:39 ` Arnaldo Carvalho de Melo
[not found] ` <20080110213909.GS22437-f8uhVLnGfZaxAyOMLChx1axOck334EZe@public.gmane.org>
2008-01-10 21:41 ` jamal
2008-01-12 15:21 ` Arnaldo Carvalho de Melo
[not found] ` <20080112152109.GA23567-f8uhVLnGfZaxAyOMLChx1axOck334EZe@public.gmane.org>
2008-01-12 15:54 ` Changing the word-size was: " Arnaldo Carvalho de Melo
[not found] ` <20080112155404.GB23567-f8uhVLnGfZaxAyOMLChx1axOck334EZe@public.gmane.org>
2008-01-12 16:28 ` Arnaldo Carvalho de Melo
[not found] ` <20080112162808.GC23567-f8uhVLnGfZaxAyOMLChx1axOck334EZe@public.gmane.org>
2008-01-12 17:28 ` Arnaldo Carvalho de Melo
[not found] ` <20080112172856.GD23567-f8uhVLnGfZaxAyOMLChx1axOck334EZe@public.gmane.org>
2008-01-12 18:08 ` jamal [this message]
2008-01-12 18:42 ` Arnaldo Carvalho de Melo
[not found] ` <20080112184211.GA17675-f8uhVLnGfZaxAyOMLChx1axOck334EZe@public.gmane.org>
2008-01-13 0:42 ` jamal
2008-01-13 1:15 ` jamal
[not found] ` <20080113163106.GE17675@ghostprotocols.net>
[not found] ` <20080113163106.GE17675-f8uhVLnGfZaxAyOMLChx1axOck334EZe@public.gmane.org>
2008-01-13 18:07 ` Arnaldo Carvalho de Melo
[not found] ` <20080113180730.GG17675-f8uhVLnGfZaxAyOMLChx1axOck334EZe@public.gmane.org>
2008-01-13 18:19 ` Arnaldo Carvalho de Melo
[not found] ` <20080113181901.GH17675-f8uhVLnGfZaxAyOMLChx1axOck334EZe@public.gmane.org>
2008-01-13 18:26 ` Arnaldo Carvalho de Melo
[not found] ` <20080113182657.GI17675-f8uhVLnGfZaxAyOMLChx1axOck334EZe@public.gmane.org>
2008-01-13 19:13 ` jamal
2008-01-12 21:36 ` Arnaldo Carvalho de Melo
[not found] ` <20080112213635.GC17675-f8uhVLnGfZaxAyOMLChx1axOck334EZe@public.gmane.org>
2008-01-12 22:08 ` Arnaldo Carvalho de Melo
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