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Moved find_segment into elf_loader.c

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Michael Brown
2005-05-17 13:37:29 +00:00
parent 9a413cfea1
commit 9968c9513e
1 changed files with 39 additions and 0 deletions
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39
src/core/elf_loader.c
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@@ -32,6 +32,45 @@ struct elf_state
static struct elf_state estate;
static unsigned long find_segment(unsigned long size, unsigned long align)
{
unsigned i;
/* Verify I have a power of 2 alignment */
if (align & (align - 1)) {
return ULONG_MAX;
}
for(i = 0; i < meminfo.map_count; i++) {
unsigned long r_start, r_end;
if (meminfo.map[i].type != E820_RAM)
continue;
if ((meminfo.map[i].addr + meminfo.map[i].size) > ULONG_MAX) {
continue;
}
r_start = meminfo.map[i].addr;
r_end = r_start + meminfo.map[i].size;
/* Don't allow the segment to overlap etherboot */
if ((r_end > virt_to_phys(_text)) && (r_start < virt_to_phys(_text))) {
r_end = virt_to_phys(_text);
}
if ((r_start > virt_to_phys(_text)) && (r_start < virt_to_phys(_end))) {
r_start = virt_to_phys(_end);
}
/* Don't allow the segment to overlap the heap */
if ((r_end > heap_ptr) && (r_start < heap_ptr)) {
r_end = heap_ptr;
}
if ((r_start > heap_ptr) && (r_start < heap_bot)) {
r_start = heap_ptr;
}
r_start = (r_start + align - 1) & ~(align - 1);
if ((r_end >= r_start) && ((r_end - r_start) >= size)) {
return r_start;
}
}
/* I did not find anything :( */
return ULONG_MAX;
}
static void elf_boot(unsigned long machine, unsigned long entry)
{
int result;