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dart: Only allocate a max of 2 L2 tables

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This is what iBoot normally does, and >2 will panic macOS

Signed-off-by: Hector Martin <marcan@marcan.st>
This commit is contained in:
Hector Martin 2022-06-01 01:49:59 +09:00
parent 2bd6060f43
commit 9748b5525e
1 changed files with 3 additions and 2 deletions
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5
src/dart.c
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@ -188,8 +188,8 @@ int dart_setup_pt_region(dart_dev_t *dart, const char *path, int device)
printf("dart: dart %s ignoring large pt-region-0, %lu L2 tables\n", path, tbl_count); printf("dart: dart %s ignoring large pt-region-0, %lu L2 tables\n", path, tbl_count);
return -1; return -1;
} }
/* first index is the l1 table */ /* first index is the l1 table, cap at 2 or else macOS hates it */
tbl_count -= 1; tbl_count = min(2, tbl_count - 1);
u64 l2_start = region[0] + SZ_16K; u64 l2_start = region[0] + SZ_16K;
for (u64 index = 0; index < tbl_count; index++) { for (u64 index = 0; index < tbl_count; index++) {
int ttbr = index >> 11; int ttbr = index >> 11;
@ -204,6 +204,7 @@ int dart_setup_pt_region(dart_dev_t *dart, const char *path, int device)
off, l2tbl); off, l2tbl);
continue; continue;
} else { } else {
printf("dart: allocating L2 tbl at %d, %d to 0x%lx\n", ttbr, idx, l2tbl);
memset((void *)l2tbl, 0, SZ_16K); memset((void *)l2tbl, 0, SZ_16K);
} }