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Show addresses of some EFI structures

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This commit is contained in:
Josh Holtrop 2022-03-09 15:30:07 -05:00
parent 1e7cd64f0f
commit dd406cf5b5
1 changed files with 25 additions and 1 deletions
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26
main.c
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@ -22,6 +22,22 @@ static void write_uint(uint32_t n)
write_string(&s[11u - i]);
}
static void write_ptr(size_t n)
{
CHAR16 hexchars[] = L"0123456789ABCDEF";
CHAR16 s[20] = {0};
size_t s_i = 0u;
for (size_t i = 0u; i < 16u; i++)
{
if ((i != 0u) && ((i % 4u) == 0u))
{
s[s_i++] = L'_';
}
s[s_i++] = hexchars[(n >> (60u - 4u * i)) & 0xFu];
}
write_string(s);
}
static void check_handle(EFI_HANDLE handle)
{
EFI_HANDLE interface = NULL;
@ -42,6 +58,10 @@ static void check_handle(EFI_HANDLE handle)
return;
}
write_string(L"interface is at ");
write_ptr((size_t)interface);
write_string(L"\r\n");
EFI_GRAPHICS_OUTPUT_PROTOCOL * gop = (EFI_GRAPHICS_OUTPUT_PROTOCOL *)interface;
}
@ -59,6 +79,10 @@ efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE * system_table)
if (EFI_ERROR(status))
return status;
write_string(L"system_table is at ");
write_ptr((size_t)system_table);
write_string(L"\r\n");
EFI_HANDLE buffer[10];
UINTN buffer_size = sizeof(buffer);
status = system_table->BootServices->LocateHandle(ByProtocol,
@ -67,7 +91,7 @@ efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE * system_table)
&buffer_size,
buffer);
buffer_size /= sizeof(EFI_HANDLE);
write_string(L"status = ");
write_string(L"LocateHandle status = ");
write_uint(status);
write_string(L", num entries = ");
write_uint(buffer_size);