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| author |  Helge Deller <deller@gmx.de>
| 2023-05-03 16:39:56 +0200 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de>
| 2023-05-03 17:43:26 +0200 |
| commit | 6e3220ba3323a2c24be834aebf5d6e9f89d0993f (patch) | |
| tree | d924d22f811ebb1512901c1a00e857a037962eb9 /arch/parisc/kernel/real2.S | |
| parent | parisc: Cleanup mmap implementation regarding color alignment (diff) | |
| download | linux-6e3220ba3323a2c24be834aebf5d6e9f89d0993f.tar.gz linux-6e3220ba3323a2c24be834aebf5d6e9f89d0993f.tar.bz2 linux-6e3220ba3323a2c24be834aebf5d6e9f89d0993f.zip | |
parisc: Fix argument pointer in real64_call_asm()
Fix the argument pointer (ap) to point to real-mode memory
instead of virtual memory.
It's interesting that this issue hasn't shown up earlier, as this could
have happened with any 64-bit PDC ROM code.
I just noticed it because I suddenly faced a HPMC while trying to execute
the 64-bit STI ROM code of an Visualize-FXe graphics card for the STI
text console.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org>
Diffstat (limited to 'arch/parisc/kernel/real2.S')
| -rw-r--r-- | arch/parisc/kernel/real2.S | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/parisc/kernel/real2.S b/arch/parisc/kernel/real2.S index 4dc12c4c0980..509d18b8e0e6 100644 --- a/arch/parisc/kernel/real2.S +++ b/arch/parisc/kernel/real2.S @@ -235,9 +235,6 @@ ENTRY_CFI(real64_call_asm) /* save fn */ copy %arg2, %r31 - /* set up the new ap */ - ldo 64(%arg1), %r29 - /* load up the arg registers from the saved arg area */ /* 32-bit calling convention passes first 4 args in registers */ ldd 0*REG_SZ(%arg1), %arg0 /* note overwriting arg0 */ @@ -249,7 +246,9 @@ ENTRY_CFI(real64_call_asm) ldd 7*REG_SZ(%arg1), %r19 ldd 1*REG_SZ(%arg1), %arg1 /* do this one last! */ + /* set up real-mode stack and real-mode ap */ tophys_r1 %sp + ldo -16(%sp), %r29 /* Reference param save area */ b,l rfi_virt2real,%r2 nop |