yuzu/unicorn
1
0
Fork 0
mirror of https://github.com/yuzu-emu/unicorn.git synced 2025-01-12 05:45:26 +00:00
Code Issues Packages Projects Releases Wiki Activity

tcg/sparc: Zero extend address argument to ld/st helpers

Browse source 
The C store helper functions take the address argument as a
target_ulong type; if this is 32 bit but the host is 64 bit
then the SPARC calling convention requires that the caller
must zero extend the value. We weren't doing this, which
meant we could pass values to the caller with high bits set
and QEMU would crash if it was compiled with optimizations.
In particular, the i386 BIOS would not start.

Backports commit 5c32be5baf41aec4f4675d2bf24f9948756abf3c from qemu
This commit is contained in:
Peter Maydell 2018-03-02 14:25:16 -05:00 committed by Lioncash
parent 40718df109
commit 008a235b5e
No known key found for this signature in database
GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 2 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
qemu/tcg/sparc/tcg-target.inc.c
View file

@ -1146,7 +1146,7 @@ static void tcg_out_qemu_ld(TCGContext *s, TCGReg data, TCGReg addr,
/* Skip the high-part; we'll perform the extract in the trampoline. */
param++;
}
tcg_out_mov(s, TCG_TYPE_REG, param++, addr);
tcg_out_mov(s, TCG_TYPE_REG, param++, addrz);
/* We use the helpers to extend SB and SW data, leaving the case
of SL needing explicit extending below. */
@ -1226,7 +1226,7 @@ static void tcg_out_qemu_st(TCGContext *s, TCGReg data, TCGReg addr,
/* Skip the high-part; we'll perform the extract in the trampoline. */
param++;
}
tcg_out_mov(s, TCG_TYPE_REG, param++, addr);
tcg_out_mov(s, TCG_TYPE_REG, param++, addrz);
if (!SPARC64 && (memop & MO_SIZE) == MO_64) {
/* Skip the high-part; we'll perform the extract in the trampoline. */
param++;