[ECOS] bss and heap

[Jonathan Larmour]

Tom Coremans wrote:
> 
> Hi,
> 
> here is a section out of the a header file for the memory layout for the
> ipaq pocket PC target.
> 
> SECTION_bss (ram, ALIGN (0x4), LMA_EQ_VMA)
> CYG_LABEL_DEFN(__heap1) = ALIGN (0x1000);
> 
> It defines a heap and a bss of about 4k.

Nope, it's a BSS aligned to 4 bytes, and heap aligned to 4K. :-)
 
> What is the exact difference between the two?
> The heap is used for all the memory allocation (malloc etc.) so for what
> is the bss used in ecos?

Uninitialized data (which gets set to 0). For static and global variables
for example.

Jifl
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