Re: [PATCH 1/1] BaseTools GenFw: Keep read only alloc section as text section when convert ELF


Bob Feng
 

Reviewed-by: Bob Feng <bob.c.feng@intel.com>

-----Original Message-----
From: Liming Gao <gaoliming@byosoft.com.cn>
Sent: Wednesday, June 9, 2021 6:06 PM
To: devel@edk2.groups.io
Cc: Feng, Bob C <bob.c.feng@intel.com>; Ni, Ray <ray.ni@intel.com>
Subject: [PATCH 1/1] BaseTools GenFw: Keep read only alloc section as text section when convert ELF

This is the fix of the regression issue at c6b872c6.
Based on ELF spec, readonly alloc section is .rodata section. It is requried.
This fix is to add back original check logic for ELF section. Now, the readonly alloc section and execute alloc section are regarded as .text section.

Signed-off-by: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Bob Feng <bob.c.feng@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
---
With this fix, previous fix commit ec1cffd9 is not required. But, the checker added by commit ec1cffd9 is correct for ACPI data conversion. So, I don't plan to revert it.

BaseTools/Source/C/GenFw/Elf32Convert.c | 3 ++- BaseTools/Source/C/GenFw/Elf64Convert.c | 3 ++-
2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/BaseTools/Source/C/GenFw/Elf32Convert.c b/BaseTools/Source/C/GenFw/Elf32Convert.c
index 314f8233234d..d917a444c82d 100644
--- a/BaseTools/Source/C/GenFw/Elf32Convert.c
+++ b/BaseTools/Source/C/GenFw/Elf32Convert.c
@@ -238,7 +238,8 @@ IsTextShdr (
Elf_Shdr *Shdr
)
{
- return (BOOLEAN) ((Shdr->sh_flags & (SHF_EXECINSTR | SHF_ALLOC)) == (SHF_EXECINSTR | SHF_ALLOC));
+ return (BOOLEAN) (((Shdr->sh_flags & (SHF_EXECINSTR | SHF_ALLOC)) == (SHF_EXECINSTR | SHF_ALLOC)) ||
+ ((Shdr->sh_flags & (SHF_WRITE | SHF_ALLOC)) ==
+ SHF_ALLOC));
}

STATIC
diff --git a/BaseTools/Source/C/GenFw/Elf64Convert.c b/BaseTools/Source/C/GenFw/Elf64Convert.c
index 8b09db7b690b..33031ec8f6e7 100644
--- a/BaseTools/Source/C/GenFw/Elf64Convert.c
+++ b/BaseTools/Source/C/GenFw/Elf64Convert.c
@@ -246,7 +246,8 @@ IsTextShdr (
Elf_Shdr *Shdr
)
{
- return (BOOLEAN) ((Shdr->sh_flags & (SHF_EXECINSTR | SHF_ALLOC)) == (SHF_EXECINSTR | SHF_ALLOC));
+ return (BOOLEAN) (((Shdr->sh_flags & (SHF_EXECINSTR | SHF_ALLOC)) == (SHF_EXECINSTR | SHF_ALLOC)) ||
+ ((Shdr->sh_flags & (SHF_WRITE | SHF_ALLOC)) ==
+ SHF_ALLOC));
}

STATIC
--
2.27.0.windows.1

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