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| author | Helge Deller <deller@gmx.de> | 2022-02-23 17:45:10 +0100 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2022-03-11 19:49:31 +0100 |
| commit | 3029ce31af158631feffdab067e99bb22b7369c4 (patch) | |
| tree | 6e22a73389ff849875fb3cd4dd83d869c2039eaf /arch/parisc/kernel/unaligned.c | |
| parent | 427c1073a2a14fe38ef0fc98d3635be51d7f7818 (diff) | |
| download | linux-3029ce31af158631feffdab067e99bb22b7369c4.tar.gz linux-3029ce31af158631feffdab067e99bb22b7369c4.tar.bz2 linux-3029ce31af158631feffdab067e99bb22b7369c4.zip | |
parisc/unaligned: Rewrite 32-bit inline assembly of emulate_sth()
Convert to use real temp variables instead of clobbering processor
registers.
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch/parisc/kernel/unaligned.c')
| -rw-r--r-- | arch/parisc/kernel/unaligned.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/arch/parisc/kernel/unaligned.c b/arch/parisc/kernel/unaligned.c index 8fbe000b33e7..0d6e90d6f497 100644 --- a/arch/parisc/kernel/unaligned.c +++ b/arch/parisc/kernel/unaligned.c @@ -234,7 +234,7 @@ static int emulate_ldd(struct pt_regs *regs, int toreg, int flop) static int emulate_sth(struct pt_regs *regs, int frreg) { - unsigned long val = regs->gr[frreg]; + unsigned long val = regs->gr[frreg], temp1; ASM_EXCEPTIONTABLE_VAR(ret); if (!frreg) @@ -244,16 +244,15 @@ static int emulate_sth(struct pt_regs *regs, int frreg) val, regs->isr, regs->ior); __asm__ __volatile__ ( -" mtsp %3, %%sr1\n" -" extrw,u %1, 23, 8, %%r19\n" -"1: stb %1, 1(%%sr1, %2)\n" -"2: stb %%r19, 0(%%sr1, %2)\n" +" mtsp %4, %%sr1\n" +" extrw,u %2, 23, 8, %1\n" +"1: stb %1, 0(%%sr1, %3)\n" +"2: stb %2, 1(%%sr1, %3)\n" "3: \n" ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 3b) ASM_EXCEPTIONTABLE_ENTRY_EFAULT(2b, 3b) - : "+r" (ret) - : "r" (val), "r" (regs->ior), "r" (regs->isr) - : "r19" ); + : "+r" (ret), "=&r" (temp1) + : "r" (val), "r" (regs->ior), "r" (regs->isr) ); return ret; } |