URL https://opencores.org/ocsvn/or1k_old/or1k_old/trunk

Subversion Repositories or1k_old

[/] [or1k_old/] [trunk/] [newlib/] [libgloss/] [mips/] [syscalls.c] - Diff between revs 39 and 56

Rev 39	Rev 56
Line 11...	Line 11...
`char *`	`char *`
`sbrk (nbytes)`	`sbrk (nbytes)`
`int nbytes;`	`int nbytes;`
`{`	`{`
`static char *heap_ptr = _end;`	`static char *heap_ptr = _end;`
	`static char *heap_start = _end;`
`char *base;`	`char *base;`
`struct s_mem {`	`struct s_mem {`
`unsigned int size;`	`unsigned int size;`
`unsigned int icsize;`	`unsigned int icsize;`
`unsigned int dcsize;`	`unsigned int dcsize;`
Line 28...	Line 29...

`get_mem_info(&mem);`	`get_mem_info(&mem);`
`/* NOTE: The value returned from the get_mem_info call is the amount`	`/* NOTE: The value returned from the get_mem_info call is the amount`
`of memory, and not the address of the (last byte + 1) */`	`of memory, and not the address of the (last byte + 1) */`

`if (((size_t)heap_ptr >= K1BASE) && ((size_t)heap_ptr < (K1BASE + mem.size))) {`	`if (((size_t)heap_ptr >= heap_start) && ((size_t)heap_ptr < (heap_start + mem.size))) {`
`avail = (K1BASE + mem.size) - (size_t)heap_ptr;`	`avail = (heap_start + mem.size) - (size_t)heap_ptr;`
`base = heap_ptr;`	`base = heap_ptr;`
`} /* else will fail since "nbytes" will be greater than zeroed "avail" value */`	`} /* else will fail since "nbytes" will be greater than zeroed "avail" value */`

`if ((nbytes > avail) \|\| (heap_ptr + nbytes < _end))`	`if ((nbytes > avail) \|\| (heap_ptr + nbytes < _end))`
`base = (char *)-1;`	`base = (char *)-1;`