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kern/ldr: enable the use of relr for relocations

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This commit is contained in:
Michael Scire
2024-09-01 22:27:48 -07:00
parent 423a05a1e9
commit 027e209073
6 changed files with 17 additions and 13 deletions
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8
mesosphere/kernel_ldr/source/kern_init_loader.cpp
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@@ -19,8 +19,8 @@
/* Necessary for calculating kernelldr size/base for initial identity mapping */
extern "C" {
extern const u8 __start__[];
extern const u8 __end__[];
extern const u8 __bin_start__[];
extern const u8 __bin_end__[];
}
@@ -88,8 +88,8 @@ namespace ams::kern::init::loader {
/* Map in an RWX identity mapping for ourselves. */
constexpr PageTableEntry KernelLdrRWXIdentityAttribute(PageTableEntry::Permission_KernelRWX, PageTableEntry::PageAttribute_NormalMemory, PageTableEntry::Shareable_InnerShareable, PageTableEntry::MappingFlag_Mapped);
const uintptr_t kernel_ldr_base = util::AlignDown(reinterpret_cast<uintptr_t>(__start__), PageSize);
const uintptr_t kernel_ldr_size = util::AlignUp(reinterpret_cast<uintptr_t>(__end__), PageSize) - kernel_ldr_base;
const uintptr_t kernel_ldr_base = util::AlignDown(reinterpret_cast<uintptr_t>(__bin_start__), PageSize);
const uintptr_t kernel_ldr_size = util::AlignUp(reinterpret_cast<uintptr_t>(__bin_end__), PageSize) - kernel_ldr_base;
init_pt.Map(kernel_ldr_base, kernel_ldr_size, kernel_ldr_base, KernelRWXIdentityAttribute, allocator, 0);
/* Map in the page table region as RW- for ourselves. */