mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-01-31 03:27:39 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Make MXCSR editable by signal handlers on Windows

Browse source 
It's now possible to recover from floating point exception traps.
This commit is contained in:
Justine Tunney 2024-04-30 13:17:22 -07:00
parent 3bcd40be12
commit 403bc25412
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
1 changed files with 2 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
libc/intrin/ntcontext2linux.c
View file

@ -48,6 +48,7 @@ textwindows void _ntcontext2linux(ucontext_t *ctx, const struct NtContext *cr) {
ctx->uc_mcontext.fs = cr->SegFs; ctx->uc_mcontext.fs = cr->SegFs;
ctx->uc_mcontext.fpregs = &ctx->__fpustate; ctx->uc_mcontext.fpregs = &ctx->__fpustate;
__repmovsb(&ctx->__fpustate, &cr->FltSave, sizeof(ctx->__fpustate)); __repmovsb(&ctx->__fpustate, &cr->FltSave, sizeof(ctx->__fpustate));
ctx->__fpustate.mxcsr = cr->MxCsr;
} }
textwindows void _ntlinux2context(struct NtContext *cr, const ucontext_t *ctx) { textwindows void _ntlinux2context(struct NtContext *cr, const ucontext_t *ctx) {
@ -74,6 +75,7 @@ textwindows void _ntlinux2context(struct NtContext *cr, const ucontext_t *ctx) {
cr->SegCs = ctx->uc_mcontext.cs; cr->SegCs = ctx->uc_mcontext.cs;
cr->SegGs = ctx->uc_mcontext.gs; cr->SegGs = ctx->uc_mcontext.gs;
cr->SegFs = ctx->uc_mcontext.fs; cr->SegFs = ctx->uc_mcontext.fs;
cr->MxCsr = ctx->__fpustate.mxcsr;
__repmovsb(&cr->FltSave, &ctx->__fpustate, sizeof(ctx->__fpustate)); __repmovsb(&cr->FltSave, &ctx->__fpustate, sizeof(ctx->__fpustate));
} }