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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.
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--- binutils/bfd/elf32-mips.c~
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+++ binutils/bfd/elf32-mips.c
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@@ -1611,7 +1611,9 @@
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 /* The SVR4 MIPS ABI says that this should be 0x10000, and Linux uses
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    page sizes of up to that limit, so we need to respect it.  */
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-#define ELF_MAXPAGESIZE			0x10000
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+/*#define ELF_MAXPAGESIZE			0x10000*/
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+/* Use 4K to shrink the elf header.  NOT for general use! */
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+#define ELF_MAXPAGESIZE			0x1000
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 #define elf32_bed			elf32_tradbed
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 /* Include the target file again for this target.  */
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--- binutils/bfd/elfn32-mips.c~
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+++ binutils/bfd/elfn32-mips.c
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@@ -1976,7 +1976,9 @@
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 /* The SVR4 MIPS ABI says that this should be 0x10000, and Linux uses
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    page sizes of up to that limit, so we need to respect it.  */
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-#define ELF_MAXPAGESIZE			0x10000
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+/*#define ELF_MAXPAGESIZE			0x10000*/
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+/* Use 4K to shrink the elf header.  NOT for general use! */
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+#define ELF_MAXPAGESIZE			0x1000
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 #define elf32_bed			elf32_tradbed
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 /* Include the target file again for this target.  */
crosstool-ng