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.section ... "ax" vs #alloc, #execinstr

DISCUSSION Eli Carter 3 participants 3 messages Apr 15, 2003

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Eli Carter

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Some of the assembly files use
.section ".start", "ax"
and others use
.section ".start", #alloc, #execinstr
(and not just for .start, try
find -name \*.S | xargs grep -e '\.section'
)

These appear to be equivelent, if not somebody clue me in please. :) Which is the prefered form? The latter seems to provide a bit more for the human, so I'd vote that direction... ;)

Thanks,

Eli
--------------------. "If it ain't broke now,
Eli Carter \ it will be soon." -- crypto-gram
eli.carter(a)inet.com `-------------------------------------------------

#1 lore raw
Quoted 11 lines · Eli Carter

Some of the assembly files use
.section ".start", "ax"
and others use
.section ".start", #alloc, #execinstr
(and not just for .start, try
find -name \*.S | xargs grep -e '\.section'
)

These appear to be equivelent, if not somebody clue me in please. :) Which is the prefered form? The latter seems to provide a bit more for the human, so I'd vote that direction... ;)

I guess you're asking about the IOP3xx stuff.

info as
mp<tab>
msec<tab>

gives all the details. To summarise though:

"a" or "#alloc" - the section is allocatable "x" or "#execinstr" - the section is executable

"ax" seems to be what Linus uses. I used to use the long versions, but changed to the shorter version - less characters to type, but still fairly readable. After all, you don't catch people trying to make ls report stuff like:

file, user read write execute, group read execute, other read execute, 2 links, owner root, group root, 44 kibytes, modified xxxx, name "foo"

(or I hope you don't! 8))

Signature · 2 lines
Russell King ([email protected])                The developer of ARM Linux
             http://www.arm.linux.org.uk/personal/aboutme.html
#2 lore raw
In reply to Eli Carter
Quoted 9 lines · Eli Carter

Some of the assembly files use
.section ".start", "ax"
and others use
.section ".start", #alloc, #execinstr
(and not just for .start, try
find -name \*.S | xargs grep -e '\.section'
)

These appear to be equivelent, if not somebody clue me in please. :)

They're equivalent.

Quoted 2 lines

Which is the prefered form? The latter seems to provide a bit more for the human, so I'd vote that direction... ;)

Well, GCC prefers the former. Binutils will accept either; they have historically different origins.

Signature · 2 lines
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer