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linux: Misc protocol bug fixes

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mintsuki 2021-01-27 17:24:56 +01:00
parent 81a134b59b
commit 1e80f131c8
4 changed files with 9 additions and 16 deletions
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25
stage2/protos/linux.c
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@ -13,7 +13,7 @@
#include <mm/mtrr.h>
#define KERNEL_LOAD_ADDR ((size_t)0x100000)
#define KERNEL_HEAP_SIZE ((size_t)0x1000)
#define KERNEL_HEAP_SIZE ((size_t)0x6000)
__attribute__((section(".realmode"), used))
static void spinup(uint16_t real_mode_code_seg, uint16_t kernel_entry_seg,
@ -80,16 +80,11 @@ void linux_load(char *config, char *cmdline) {
setup_code_size *= 512;
print("linux: Setup code size: %x\n", setup_code_size);
size_t real_mode_code_size = 512 + setup_code_size;
print("linux: Real Mode code size: %x\n", real_mode_code_size);
size_t real_mode_and_heap_size = 0x8000 + KERNEL_HEAP_SIZE;
size_t real_mode_and_heap_size =
((real_mode_code_size & 0x0f) + 0x10) + KERNEL_HEAP_SIZE;
void *real_mode_code = conv_mem_alloc_aligned(real_mode_and_heap_size, 0x1000);
void *real_mode_code = conv_mem_alloc_aligned(0x10000, 0x1000);
fread(kernel, real_mode_code, 0, real_mode_code_size);
@ -106,12 +101,7 @@ void linux_load(char *config, char *cmdline) {
size_t heap_end_ptr = real_mode_and_heap_size - 0x200;
*((uint16_t *)(real_mode_code + 0x224)) = (uint16_t)heap_end_ptr;
// The command line needs to be before address 0xa0000, we can use
// a conv_mem_alloc() allocated buffer for that.
// Allocate the relocation buffer for the command line early so it's allocated
// before the real mode code.
size_t cmdline_len = strlen(cmdline);
char *cmdline_reloc = conv_mem_alloc(cmdline_len + 1);
char *cmdline_reloc = real_mode_code + real_mode_and_heap_size;
strcpy(cmdline_reloc, cmdline);
// vid_mode. 0xffff means "normal"
@ -142,11 +132,14 @@ void linux_load(char *config, char *cmdline) {
*((uint32_t *)(real_mode_code + 0x228)) = (uint32_t)cmdline_reloc;
// load kernel
print("Loading kernel...\n");
print("linux: Loading kernel...\n");
memmap_alloc_range(KERNEL_LOAD_ADDR, kernel->size - real_mode_code_size, 0, true, true);
fread(kernel, (void *)KERNEL_LOAD_ADDR, real_mode_code_size, kernel->size - real_mode_code_size);
uint32_t modules_mem_base = *((uint32_t *)(real_mode_code + 0x22c)) + 1;
if (modules_mem_base == 0)
modules_mem_base = 0x38000000;
size_t size_of_all_modules = 0;
for (size_t i = 0; ; i++) {
@ -180,7 +173,7 @@ void linux_load(char *config, char *cmdline) {
if (!uri_open(&module, module_path))
panic("Could not open `%s`", module_path);
print("Loading module `%s`...\n", module_path);
print("linux: Loading module `%s`...\n", module_path);
fread(&module, (void *)_modules_mem_base, 0, module.size);