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Move all guid instances into .rodata in our own list.

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This commit is contained in:
Justin C. Miller
2018-04-01 16:16:19 -07:00
parent 913fb202eb
commit 23365b39c7
7 changed files with 94 additions and 64 deletions
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21
src/boot/main.c
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@@ -4,6 +4,7 @@
#include <stddef.h>
#include "console.h"
#include "guids.h"
#include "loader.h"
#include "memory.h"
#include "utility.h"
@@ -44,17 +45,11 @@ struct popcorn_data {
EFI_MEMORY_DESCRIPTOR *memory_map;
EFI_RUNTIME_SERVICES *runtime;
void *acpi_table;
}
__attribute__((aligned(_Alignof(EFI_MEMORY_DESCRIPTOR))));
#pragma pack(pop)
int is_guid(EFI_GUID *a, EFI_GUID *b)
{
uint64_t *ai = (uint64_t *)a;
uint64_t *bi = (uint64_t *)b;
return ai[0] == bi[0] && ai[1] == bi[1];
}
EFI_STATUS
efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *system_table)
{
@@ -67,14 +62,17 @@ efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *system_table)
CHECK_EFI_STATUS_OR_RETURN(status, "con_initialize");
// From here on out, we can use CHECK_EFI_STATUS_OR_FAIL instead
EFI_GUID acpi1_guid = ACPI_TABLE_GUID;
EFI_GUID acpi2_guid = {0x8868e871,0xe4f1,0x11d3,{0xbc,0x22,0x00,0x80,0xc7,0x3c,0x88,0x81}};
// Find ACPI tables. Ignore ACPI 1.0 if a 2.0 table is found.
//
void *acpi_table = NULL;
for (size_t i=0; i<system_table->NumberOfTableEntries; ++i) {
EFI_CONFIGURATION_TABLE *efi_table = &system_table->ConfigurationTable[i];
if (is_guid(&efi_table->VendorGuid, &guid_acpi2)) {
acpi_table = efi_table->VendorTable;
break;
} else if (is_guid(&efi_table->VendorGuid, &guid_acpi1)) {
// Mark a v1 table with the LSB high
acpi_table = (void *)((intptr_t)efi_table->VendorTable | 0x1);
}
}
@@ -126,6 +124,7 @@ efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *system_table)
data_header->flags = 0;
data_header->memory_map = (EFI_MEMORY_DESCRIPTOR *)(data_header + 1);
data_header->runtime = system_table->RuntimeServices;
data_header->acpi_table = acpi_table;
// Save the memory map and tell the firmware we're taking control.
//