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stivale2: Introduce fully virtual kernel mappings (bug fixes)

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This commit is contained in:
mintsuki 2021-10-29 02:15:17 +02:00
parent c7eb6319c0
commit dbbef9f6d3
4 changed files with 14 additions and 19 deletions
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23
stage23/lib/elf.c
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@ -457,8 +457,6 @@ int elf64_load(uint8_t *elf, uint64_t *entry_point, uint64_t *top, uint64_t *_sl
uint64_t max_align = elf64_max_align(elf); uint64_t max_align = elf64_max_align(elf);
uint64_t base_load_addr;
if (fully_virtual) { if (fully_virtual) {
simulation = false; simulation = false;
@ -486,9 +484,7 @@ int elf64_load(uint8_t *elf, uint64_t *entry_point, uint64_t *top, uint64_t *_sl
uint64_t image_size = max_vaddr - min_vaddr; uint64_t image_size = max_vaddr - min_vaddr;
base_load_addr = (uintptr_t)ext_mem_alloc_type_aligned(image_size, alloc_type, max_align); *physical_base = (uintptr_t)ext_mem_alloc_type_aligned(image_size, alloc_type, max_align);
*physical_base = base_load_addr;
*virtual_base = min_vaddr; *virtual_base = min_vaddr;
} }
@ -520,23 +516,22 @@ final:
if (use_paddr) { if (use_paddr) {
load_addr = phdr.p_paddr; load_addr = phdr.p_paddr;
} else { } else {
load_addr = phdr.p_vaddr; if (phdr.p_vaddr >= 0xffffffff80000000) {
if (load_addr & ((uint64_t)1 << 63)) {
higher_half = true; higher_half = true;
load_addr -= FIXED_HIGHER_HALF_OFFSET_64;
if (fully_virtual) { if (fully_virtual) {
load_addr += base_load_addr; load_addr = *physical_base + (phdr.p_vaddr - *virtual_base);
} else {
load_addr = phdr.p_vaddr - FIXED_HIGHER_HALF_OFFSET_64;
} }
} }
} }
if (higher_half == true && load_addr + phdr.p_memsz > 0x80000000) {
panic("elf: Higher half executable trying to load too high");
}
if (!fully_virtual) { if (!fully_virtual) {
if (higher_half == true && load_addr + phdr.p_memsz > 0x80000000) {
panic("elf: Higher half executable trying to load too high");
}
load_addr += slide; load_addr += slide;
} }

6
stage23/protos/stivale.c
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@ -300,7 +300,7 @@ void stivale_load(char *config, char *cmdline) {
pagemap_t pagemap = {0}; pagemap_t pagemap = {0};
if (bits == 64) if (bits == 64)
pagemap = stivale_build_pagemap(want_5lv, false, NULL, 0, false, 0); pagemap = stivale_build_pagemap(want_5lv, false, NULL, 0, false, 0, 0);
// Reserve 32K at 0x70000 // Reserve 32K at 0x70000
memmap_alloc_range(0x70000, 0x8000, MEMMAP_USABLE, true, true, false, false); memmap_alloc_range(0x70000, 0x8000, MEMMAP_USABLE, true, true, false, false);
@ -325,7 +325,7 @@ void stivale_load(char *config, char *cmdline) {
} }
pagemap_t stivale_build_pagemap(bool level5pg, bool unmap_null, struct elf_range *ranges, size_t ranges_count, pagemap_t stivale_build_pagemap(bool level5pg, bool unmap_null, struct elf_range *ranges, size_t ranges_count,
bool want_fully_virtual, uint64_t physical_base) { bool want_fully_virtual, uint64_t physical_base, uint64_t virtual_base) {
pagemap_t pagemap = new_pagemap(level5pg ? 5 : 4); pagemap_t pagemap = new_pagemap(level5pg ? 5 : 4);
uint64_t higher_half_base = level5pg ? 0xff00000000000000 : 0xffff800000000000; uint64_t higher_half_base = level5pg ? 0xff00000000000000 : 0xffff800000000000;
@ -341,7 +341,7 @@ pagemap_t stivale_build_pagemap(bool level5pg, bool unmap_null, struct elf_range
if (virt & ((uint64_t)1 << 63)) { if (virt & ((uint64_t)1 << 63)) {
if (want_fully_virtual) { if (want_fully_virtual) {
phys = physical_base + (virt - FIXED_HIGHER_HALF_OFFSET_64); phys = physical_base + (virt - virtual_base);
} else { } else {
phys = virt - FIXED_HIGHER_HALF_OFFSET_64; phys = virt - FIXED_HIGHER_HALF_OFFSET_64;
} }

2
stage23/protos/stivale.h
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@ -11,7 +11,7 @@ void stivale_load(char *config, char *cmdline);
bool stivale_load_by_anchor(void **_anchor, const char *magic, bool stivale_load_by_anchor(void **_anchor, const char *magic,
uint8_t *file, uint64_t filesize); uint8_t *file, uint64_t filesize);
pagemap_t stivale_build_pagemap(bool level5pg, bool unmap_null, struct elf_range *ranges, size_t ranges_count, pagemap_t stivale_build_pagemap(bool level5pg, bool unmap_null, struct elf_range *ranges, size_t ranges_count,
bool want_fully_virtual, uint64_t physical_base); bool want_fully_virtual, uint64_t physical_base, uint64_t virtual_base);
__attribute__((noreturn)) void stivale_spinup( __attribute__((noreturn)) void stivale_spinup(
int bits, bool level5pg, pagemap_t *pagemap, int bits, bool level5pg, pagemap_t *pagemap,
uint64_t entry_point, uint64_t stivale_struct, uint64_t stack, uint64_t entry_point, uint64_t stivale_struct, uint64_t stack,

2
stage23/protos/stivale2.c
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@ -639,7 +639,7 @@ have_tm_tag:;
pagemap = stivale_build_pagemap(want_5lv, unmap_null, pagemap = stivale_build_pagemap(want_5lv, unmap_null,
want_pmrs ? ranges : NULL, want_pmrs ? ranges : NULL,
want_pmrs ? ranges_count : 0, want_pmrs ? ranges_count : 0,
want_fully_virtual, physical_base); want_fully_virtual, physical_base, virtual_base);
#if uefi == 1 #if uefi == 1
efi_exit_boot_services(); efi_exit_boot_services();