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x86: fix ROM permissions

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Only the text area now has execute permissions,
instead of both text and rodata.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2019-02-11 23:01:32 -08:00 • committed by Andrew Boie
commit 5f4683db34
3 changed files with 16 additions and 6 deletions
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6
arch/x86/core/x86_mmu.c
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@ -17,9 +17,13 @@
/* Mark text and rodata as read-only.
* Userspace may read all text and rodata.
*/
MMU_BOOT_REGION((u32_t)&_image_rom_start, (u32_t)&_image_rom_size,
MMU_BOOT_REGION((u32_t)&_image_text_start, (u32_t)&_image_text_size,
MMU_ENTRY_READ | MMU_ENTRY_USER);
MMU_BOOT_REGION((u32_t)&_image_rodata_start, (u32_t)&_image_rodata_size,
MMU_ENTRY_READ | MMU_ENTRY_USER |
MMU_ENTRY_EXECUTE_DISABLE);
#ifdef CONFIG_APP_SHARED_MEM
MMU_BOOT_REGION((u32_t)&_app_smem_start, (u32_t)&_app_smem_size,
MMU_ENTRY_WRITE | MMU_ENTRY_RUNTIME_USER |