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bionic/linker: change the buddy allocator to take a handle to the managed area

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-- rename struct ba_info to struct ba
-- move the static ba descriptor from ba.c to linker.c and rename it ba_prelink
-- ba_init, ba_allocate, ba_free, ba_start_addr, and ba_len all take a pointer
   to struct ba

Signed-off-by: Iliyan Malchev <malchev@google.com>
This commit is contained in:
Iliyan Malchev
2009-10-16 17:50:42 -07:00
parent 7e7d6c48a0
commit af7315acf6
3 changed files with 64 additions and 62 deletions
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24
linker/linker.c
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@@ -91,6 +91,18 @@ static soinfo *sonext = &libdl_info;
static soinfo *somain; /* main process, always the one after libdl_info */
#endif
/* Set up for the buddy allocator managing the prelinked libraries. */
static struct ba_bits ba_prelink_bitmap[(LIBLAST - LIBBASE) / LIBINC];
static struct ba ba_prelink = {
.base = LIBBASE,
.size = LIBLAST - LIBBASE,
.min_alloc = LIBINC,
.max_order = 128,
.bitmap = ba_prelink_bitmap,
.num_entries = sizeof(ba_prelink_bitmap)/sizeof(ba_prelink_bitmap[0]),
};
static inline int validate_soinfo(soinfo *si)
{
return (si >= sopool && si < sopool + SO_MAX) ||
@@ -783,14 +795,14 @@ alloc_mem_region(soinfo *si)
for it from the buddy allocator, which manages the area between
LIBBASE and LIBLAST.
*/
si->ba_index = ba_allocate(si->size);
si->ba_index = ba_allocate(&ba_prelink, si->size);
if(si->ba_index >= 0) {
si->base = ba_start_addr(si->ba_index);
si->base = ba_start_addr(&ba_prelink, si->ba_index);
PRINT("%5d mapping library '%s' at %08x (index %d) " \
"through buddy allocator.\n",
pid, si->name, si->base, si->ba_index);
if (reserve_mem_region(si) < 0) {
ba_free(si->ba_index);
ba_free(&ba_prelink, si->ba_index);
si->ba_index = -1;
si->base = 0;
goto err;
@@ -1086,7 +1098,7 @@ load_library(const char *name)
/* Now actually load the library's segments into right places in memory */
if (load_segments(fd, &__header[0], si) < 0) {
if (si->ba_index >= 0) {
ba_free(si->ba_index);
ba_free(&ba_prelink, si->ba_index);
si->ba_index = -1;
}
goto fail;
@@ -1189,7 +1201,7 @@ unsigned unload_library(soinfo *si)
PRINT("%5d releasing library '%s' address space at %08x "\
"through buddy allocator.\n",
pid, si->name, si->base);
ba_free(si->ba_index);
ba_free(&ba_prelink, si->ba_index);
}
notify_gdb_of_unload(si);
free_info(si);
@@ -1897,7 +1909,7 @@ unsigned __linker_init(unsigned **elfdata)
vecs += 2;
}
ba_init();
ba_init(&ba_prelink);
si->base = 0;
si->dynamic = (unsigned *)-1;