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drc: align tcache_default to 64k on arm

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Newer arm64 hw supports 64k pages, and recent Linux distros provide
kernel packages like linux-image-generic-64k (can be used on r-pi4
with Ubuntu for example). It affects 32bit mode also, so assume that
an arm32 binary compiled for vfp may be used on such kernel.

Without this mprotect() fails to set exec permission because of bad
alignment.
This commit is contained in:
notaz 2024-03-09 22:04:16 +02:00 • committed by irixxxx
parent 8cca318242
commit eac7a97e4f
1 changed files with 7 additions and 1 deletions
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8
cpu/drc/cmn.c
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@ -10,7 +10,13 @@
#include <pico/pico_int.h>
#include "cmn.h"
u8 ALIGNED(4096) tcache_default[DRC_TCACHE_SIZE];
#if defined(__aarch64__) || defined(__VFP_FP__)
// might be running on a 64k-page kernel
#define PICO_PAGE_ALIGN 65536
#else
#define PICO_PAGE_ALIGN 4096
#endif
u8 ALIGNED(PICO_PAGE_ALIGN) tcache_default[DRC_TCACHE_SIZE];
u8 *tcache;
void drc_cmn_init(void)