-----邮件原件-----
发件人: devel@edk2.groups.io <devel@edk2.groups.io> 代表 Brian J.
Johnson
发送时间: 2022年12月2日 0:18
收件人: devel@edk2.groups.io; kraxel@...
抄送: Alexey Kardashevskiy <aik@...>; Liming Gao
<gaoliming@...>; Erdem Aktas <erdemaktas@...>;
Pawel Polawski <ppolawsk@...>; Jordan Justen
<jordan.l.justen@...>; Ard Biesheuvel <ardb+tianocore@...>;
Yuwei Chen <yuwei.chen@...>; Tom Lendacky
<thomas.lendacky@...>; James Bottomley <jejb@...>;
Oliver Steffen <osteffen@...>; Jiewen Yao <jiewen.yao@...>;
Min Xu <min.m.xu@...>; Brijesh Singh <brijesh.singh@...>; Bob
Feng <bob.c.feng@...>
主题: Re: [edk2-devel] [PATCH v7 2/2] tools_def: add
-fno-omit-frame-pointer to GCC48_{IA32,X64}_CC_FLAGS

OK. Doesn't look like a big impact.

Thanks,
Brian J. Johnson
-------- Original Message --------
From: Gerd Hoffmann [mailto:kraxel@...]
Sent: Thursday, December 1, 2022 at 2:38 AM
To: Brian J. Johnson <brian.johnson@...>
Cc: devel@edk2.groups.io, Alexey Kardashevskiy <aik@...>, Liming
Gao <gaoliming@...>, Erdem Aktas <erdemaktas@...>,
Pawel Polawski <ppolawsk@...>, Jordan Justen
<jordan.l.justen@...>, Ard Biesheuvel <ardb+tianocore@...>,
Yuwei Chen <yuwei.chen@...>, Tom Lendacky
<thomas.lendacky@...>, James Bottomley <jejb@...>,
Oliver
Steffen <osteffen@...>, Jiewen Yao <jiewen.yao@...>, Min Xu
<min.m.xu@...>, Brijesh Singh <brijesh.singh@...>, Bob Feng
<bob.c.feng@...>
Subject: [edk2-devel] [PATCH v7 2/2] tools_def: add
-fno-omit-frame-pointer to GCC48_{IA32,X64}_CC_FLAGS

On Wed, Nov 30, 2022 at 01:28:42PM -0600, Brian J. Johnson wrote:

Gerd,

Sorry, gotta ask: does this make much difference in the size of the
compiled code? That's a constraint on many real-hardware X64 platforms,
especially for 32-bit code.

Quick test with OvmfPkg/OvmfPkgIa32X64.dsc (sec/pei ia32, dxe x64):

master branch:

FV Space Information
SECFV [11%Full] 212992 (0x34000) total, 23728 (0x5cb0) used, 189264
(0x2e350) free
PEIFV [34%Full] 917504 (0xe0000) total, 319416 (0x4dfb8) used, 598088
(0x92048) free
DXEFV [49%Full] 12582912 (0xc00000) total, 6268032 (0x5fa480) used,
6314880 (0x605b80) free
FVMAIN_COMPACT [98%Full] 1753088 (0x1ac000) total, 1725328 (0x1a5390)
used, 27760 (0x6c70) free

with patch applied:

FV Space Information
SECFV [11%Full] 212992 (0x34000) total, 23728 (0x5cb0) used, 189264
(0x2e350) free
PEIFV [34%Full] 917504 (0xe0000) total, 319416 (0x4dfb8) used, 598088
(0x92048) free
DXEFV [50%Full] 12582912 (0xc00000) total, 6335936 (0x60adc0) used,
6246976 (0x5f5240) free
FVMAIN_COMPACT [99%Full] 1753088 (0x1ac000) total, 1738176 (0x1a85c0)
used, 14912 (0x3a40) free

So slightly more for 64-bit code.

take care,
Gerd