[PATCH 0/1] MR3126: configure: Build x86_64 PE code with mcmodel=small.

[Rémi Bernon]

Saving a huge number of .refptr indirections for all extern symbols.

Proton is using this for a while now.

-- 
https://gitlab.winehq.org/wine/wine/-/merge_requests/3126

[PATCH 1/1] configure: Build x86_64 PE code with mcmodel=small.

[Rémi Bernon]

From: Rémi Bernon <rbernon(a)codeweavers.com>

Saving a huge number of .refptr indirections for all extern symbols.
---
 configure.ac | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index bed7b2dec28..606be62632e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -960,7 +960,8 @@ do
                                [AS_VAR_APPEND([${wine_arch}_LDFLAGS],[" -Wl,--disable-stdcall-fixup"])]) ;;
       x86_64) WINE_TRY_PE_CFLAGS([-Wformat-overflow])
               WINE_TRY_PE_CFLAGS([-Wnonnull])
-              WINE_TRY_PE_CFLAGS([-mcx16]) ;;
+              WINE_TRY_PE_CFLAGS([-mcx16])
+              WINE_TRY_PE_CFLAGS([-mcmodel=small]) ;;
     esac
 
     dnl Determine debug info format
-- 
GitLab

https://gitlab.winehq.org/wine/wine/-/merge_requests/3126

[Zebediah Figura (＠zfigura)]

That assumes all code will be mapped in the lower 2 GiB, I don't think we want that requirement?

-- 
https://gitlab.winehq.org/wine/wine/-/merge_requests/3126#note_36508

[Rémi Bernon]

On Wed Jun 21 16:22:38 2023 +0000, Zebediah Figura wrote:
> That assumes all code will be mapped in the lower 2 GiB, I don't think
> we want that requirement?
> It's only a requirement for the pseudo-GOT that MinGW generates for its unix-like auto exported symbols feature, we use explicit exported symbols with import and export tables which support absolute addresses.

-- 
https://gitlab.winehq.org/wine/wine/-/merge_requests/3126#note_36509