Re: [edk2-devel] [PATCH v2 2/5] MdePkg/BaseLib: add ASSERT in ARM* SetJump implementations

["Leif Lindholm" <quic_llindhol@quicinc.com>]

On Fri, Sep 29, 2023 at 16:06:54 +0100, Sami Mujawar wrote:
> Hi Leif,
> 
> Thank you for this patch.
> 
> This patch looks good to me.
> 
> Just a question, should we also do the same for the AArch32 builds?

Hmm, fair point.
But I just managed to get rid of this set after nearly 4 years :):)

> In either case,
> 
> Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>

Thanks!
Commit message typo in 5/5 fixed and series merged as
f6a314e5b5dc..1a66bd51ca21.

Regards,

Leif

> Regards,
> 
> Sami Mujawar
> 
> On 26/09/2023 06:15 pm, Leif Lindholm wrote:
> > The SetJump comment header states that:
> >    If JumpBuffer is NULL, then ASSERT().
> > 
> > However, this was not currently done.
> > Add a call to InternalAssertJumpBuffer.
> > 
> > Signed-off-by: Leif Lindholm <quic_llindhol@quicinc.com>
> > Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
> > Cc: Sami Mujawar <sami.mujawar@arm.com>
> > ---
> >   MdePkg/Library/BaseLib/AArch64/SetJumpLongJump.S   | 8 ++++++++
> >   MdePkg/Library/BaseLib/AArch64/SetJumpLongJump.asm | 8 ++++++++
> >   2 files changed, 16 insertions(+)
> > 
> > diff --git a/MdePkg/Library/BaseLib/AArch64/SetJumpLongJump.S b/MdePkg/Library/BaseLib/AArch64/SetJumpLongJump.S
> > index 78db9b3d1e78..de79ad3a0a3e 100644
> > --- a/MdePkg/Library/BaseLib/AArch64/SetJumpLongJump.S
> > +++ b/MdePkg/Library/BaseLib/AArch64/SetJumpLongJump.S
> > @@ -46,6 +46,14 @@ GCC_ASM_EXPORT(InternalLongJump)
> >   #
> >   ASM_PFX(SetJump):
> >           AARCH64_BTI(c)
> > +#ifndef MDEPKG_NDEBUG
> > +        stp     x29, x30, [sp, #-32]!
> > +        mov     x29, sp
> > +        str     x0, [sp, #16]
> > +        bl      InternalAssertJumpBuffer
> > +        ldr     x0, [sp, #16]
> > +        ldp     x29, x30, [sp], #32
> > +#endif
> >           mov     x16, sp // use IP0 so save SP
> >   #define REG_PAIR(REG1, REG2, OFFS)      stp REG1, REG2, [x0, OFFS]
> >   #define REG_ONE(REG1, OFFS)             str REG1, [x0, OFFS]
> > diff --git a/MdePkg/Library/BaseLib/AArch64/SetJumpLongJump.asm b/MdePkg/Library/BaseLib/AArch64/SetJumpLongJump.asm
> > index d8b267addc1a..c2774eece311 100644
> > --- a/MdePkg/Library/BaseLib/AArch64/SetJumpLongJump.asm
> > +++ b/MdePkg/Library/BaseLib/AArch64/SetJumpLongJump.asm
> > @@ -44,6 +44,14 @@
> >   ;  );
> >   ;
> >   SetJump
> > +#ifndef MDEPKG_NDEBUG
> > +        stp     x29, x30, [sp, #-32]!
> > +        mov     x29, sp
> > +        str     x0, [sp, #16]
> > +        bl      InternalAssertJumpBuffer
> > +        ldr     x0, [sp, #16]
> > +        ldp     x29, x30, [sp], #32
> > +#endif
> >           mov     x16, sp // use IP0 so save SP
> >   #define REG_PAIR(REG1, REG2, OFFS)      stp REG1, REG2, [x0, OFFS]
> >   #define REG_ONE(REG1, OFFS)             str REG1, [x0, OFFS]


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