Re: [PATCH 2/2] grub-efi: allow compilation without large model support

[jhuang0 <jackie.huang@windriver.com>]

On 11/22/2013 4:00 PM, Vladimir 'φ-coder/phcoder' Serbinenko wrote:
> On 22.11.2013 08:23, jackie.huang@windriver.com wrote:
>> From: Jackie Huang <jackie.huang@windriver.com>
>>
>> -mcmodel=large is not supported by gcc with version lower
>> than 4.4, but we don't need to use memory over 4GiB, so add
>> a patch to allow compilation without large model support.
>>
> Please try attached patch instead

Thanks, I'm going to try with your patch.

Thanks,
Jackie

>> Signed-off-by: Jackie Huang <jackie.huang@windriver.com>
>> ---
>>   ...allow-a-compilation-without-mcmodel-large.patch | 81 ++++++++++++++++++++++
>>   meta/recipes-bsp/grub/grub-efi_2.00.bb             |  1 +
>>   2 files changed, 82 insertions(+)
>>   create mode 100644 meta/recipes-bsp/grub/files/grub-efi-allow-a-compilation-without-mcmodel-large.patch
>>
>> diff --git a/meta/recipes-bsp/grub/files/grub-efi-allow-a-compilation-without-mcmodel-large.patch b/meta/recipes-bsp/grub/files/grub-efi-allow-a-compilation-without-mcmodel-large.patch
>> new file mode 100644
>> index 0000000..c6a30c8
>> --- /dev/null
>> +++ b/meta/recipes-bsp/grub/files/grub-efi-allow-a-compilation-without-mcmodel-large.patch
>> @@ -0,0 +1,81 @@
>> +From 0cea0e4266214da1f11e812834f5d5c47a6e04e6 Mon Sep 17 00:00:00 2001
>> +From: Jackie Huang <jackie.huang@windriver.com>
>> +Date: Tue, 5 Nov 2013 07:23:32 -0500
>> +Subject: [PATCH] Allow a compilation without -mcmodel=large
>> +
>> +* kern/efi/mm.c (grub_efi_allocate_pages): don't allocate >4GiB
>> +  when compiled without -mcmodel=large
>> +  (filter_memory_map): remove memory post 4 GiB when compiled
>> +  without -mcmodel=large
>> +* configure.ac: add -DMCMODEL_SMALL=1 to TARGET_CFLAGS when
>> +  -mcmodel=large isn't supported
>> +
>> +It's ported from old version of grub which was deliberately
>> +removed in current and newer version:
>> +
>> +2009-06-04  Vladimir Serbinenko  <phcoder@gmail.com>
>> +
>> +         Allow a compilation without -mcmodel=large
>> +
>> +2010-04-21  Vladimir Serbinenko  <phcoder@gmail.com>
>> +
>> +   * configure.ac: Refuse to compile for x86_64-efi is mcmodel=large
>> +     is not supported.
>> +
>> +Upstream-Status: Inappropriate [compatibility]
>> +
>> +Signed-off-by: Jackie Huang <jackie.huang@windriver.com>
>> +---
>> + configure.ac            |    4 +++-
>> + grub-core/kern/efi/mm.c |    6 +++---
>> + 2 files changed, 6 insertions(+), 4 deletions(-)
>> +
>> +diff --git a/configure.ac b/configure.ac
>> +index 319d063..ee72fee 100644
>> +--- a/configure.ac
>> ++++ b/configure.ac
>> +@@ -567,7 +567,9 @@ if test "$target_cpu"-"$platform" = x86_64-efi; then
>> + 		      [grub_cv_cc_mcmodel=no])
>> +   ])
>> +   if test "x$grub_cv_cc_mcmodel" = xno; then
>> +-    AC_MSG_ERROR([-mcmodel=large not supported. Upgrade your gcc.])
>> ++    CFLAGS="$SAVED_CFLAGS -m64 -DMCMODEL_SMALL=1"
>> ++    TARGET_CFLAGS="$TARGET_CFLAGS -DMCMODEL_SMALL=1"
>> ++    AC_MSG_WARN([-mcmodel=large not supported. You won't be able to use the memory over 4GiB. Upgrade your gcc.])
>> +   else
>> +     TARGET_CFLAGS="$TARGET_CFLAGS -mcmodel=large"
>> +   fi
>> +diff --git a/grub-core/kern/efi/mm.c b/grub-core/kern/efi/mm.c
>> +index a2edc84..c67dd13 100644
>> +--- a/grub-core/kern/efi/mm.c
>> ++++ b/grub-core/kern/efi/mm.c
>> +@@ -62,7 +62,7 @@ grub_efi_allocate_pages (grub_efi_physical_address_t address,
>> +     return 0;
>> + #endif
>> +
>> +-#if 1
>> ++#if defined (MCMODEL_SMALL)
>> +   if (address == 0)
>> +     {
>> +       type = GRUB_EFI_ALLOCATE_MAX_ADDRESS;
>> +@@ -305,7 +305,7 @@ filter_memory_map (grub_efi_memory_descriptor_t *memory_map,
>> +        desc = NEXT_MEMORY_DESCRIPTOR (desc, desc_size))
>> +     {
>> +       if (desc->type == GRUB_EFI_CONVENTIONAL_MEMORY
>> +-#if 1
>> ++#if defined (MCMODEL_SMALL)
>> + 	  && desc->physical_start <= 0xffffffff
>> + #endif
>> + 	  && desc->physical_start + PAGES_TO_BYTES (desc->num_pages) > 0x100000
>> +@@ -321,7 +321,7 @@ filter_memory_map (grub_efi_memory_descriptor_t *memory_map,
>> + 	      desc->physical_start = 0x100000;
>> + 	    }
>> +
>> +-#if 1
>> ++#if defined (MCMODEL_SMALL)
>> + 	  if (BYTES_TO_PAGES (filtered_desc->physical_start)
>> + 	      + filtered_desc->num_pages
>> + 	      > BYTES_TO_PAGES (0x100000000LL))
>> +--
>> +1.7.1
>> +
>> diff --git a/meta/recipes-bsp/grub/grub-efi_2.00.bb b/meta/recipes-bsp/grub/grub-efi_2.00.bb
>> index 2fe688c..deb9514 100644
>> --- a/meta/recipes-bsp/grub/grub-efi_2.00.bb
>> +++ b/meta/recipes-bsp/grub/grub-efi_2.00.bb
>> @@ -27,6 +27,7 @@ SRC_URI = "ftp://ftp.gnu.org/gnu/grub/grub-${PV}.tar.gz \
>>              file://grub-no-unused-result.patch \
>>              file://grub-2.00-ignore-gnulib-gets-stupidity.patch \
>>              file://fix-issue-with-flex-2.5.37.patch \
>> +           file://grub-efi-allow-a-compilation-without-mcmodel-large.patch \
>>             "
>>   SRC_URI[md5sum] = "e927540b6eda8b024fb0391eeaa4091c"
>>   SRC_URI[sha256sum] = "65b39a0558f8c802209c574f4d02ca263a804e8a564bc6caf1cd0fd3b3cc11e3"
>>
>

-- 
Jackie Huang
WIND RIVER | China Development Center
MSN:jackielily@hotmail.com
Tel: +86 8477 8594
Mobile: +86 138 1027 4745