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patches/binutils/2.15/400-mips-ELF_MAXPAGESIZE-4K.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sun May 20 13:48:26 2007 +0000 (2007-05-20)
changeset 112 ea15433daba0
permissions -rw-r--r--
Ah! I finally have a progress bar that doesn't stall the build!
- pipe size in Linux is only 8*512=4096 bytes
- pipe size is not setable
- when the feeding process spits out data faster than the eating
process can read it, then the feeding process stalls after 4KiB
of data sent to the pipe
- for us, the progress bar would spawn a sub-shell every line,
and the sub-shell would in turn spawn a 'date' command.
Which was sloooww as hell, and would cause some kind of a
starvation: the pipe was full most of the time, and the
feeding process was stalled all this time.

Now, we use internal variables and a little hack based onan offset
to determine the elapsed time. Much faster this way, but still
CPU-intensive. 
     1 --- binutils/bfd/elf32-mips.c~

     2 +++ binutils/bfd/elf32-mips.c

     3 @@ -1611,7 +1611,9 @@

     4  

     5  /* The SVR4 MIPS ABI says that this should be 0x10000, and Linux uses

     6     page sizes of up to that limit, so we need to respect it.  */

     7 -#define ELF_MAXPAGESIZE			0x10000

     8 +/*#define ELF_MAXPAGESIZE			0x10000*/

     9 +/* Use 4K to shrink the elf header.  NOT for general use! */

    10 +#define ELF_MAXPAGESIZE			0x1000

    11  #define elf32_bed			elf32_tradbed

    12  

    13  /* Include the target file again for this target.  */

    14 --- binutils/bfd/elfn32-mips.c~

    15 +++ binutils/bfd/elfn32-mips.c

    16 @@ -1976,7 +1976,9 @@

    17  

    18  /* The SVR4 MIPS ABI says that this should be 0x10000, and Linux uses

    19     page sizes of up to that limit, so we need to respect it.  */

    20 -#define ELF_MAXPAGESIZE			0x10000

    21 +/*#define ELF_MAXPAGESIZE			0x10000*/

    22 +/* Use 4K to shrink the elf header.  NOT for general use! */

    23 +#define ELF_MAXPAGESIZE			0x1000

    24  #define elf32_bed			elf32_tradbed

    25  

    26  /* Include the target file again for this target.  */
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