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| author | Stephen Rothwell <sfr@canb.auug.org.au> | 2008-06-27 16:18:27 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-07-01 11:28:59 +1000 |
| commit | fcbc5a976b1cafe2e866871c86d239d57503bfd5 (patch) | |
| tree | 9f9727a0d86a52ee663db438495ef25889ff6319 | |
| parent | 3420b5daffbf5892634fd89a04c010e71e8aeebf (diff) | |
| download | linux-fcbc5a976b1cafe2e866871c86d239d57503bfd5.tar.gz linux-fcbc5a976b1cafe2e866871c86d239d57503bfd5.tar.bz2 linux-fcbc5a976b1cafe2e866871c86d239d57503bfd5.zip | |
powerpc: Explicitly copy elements of pt_regs
Gcc 4.3 produced this warning:
arch/powerpc/kernel/signal_64.c: In function 'restore_sigcontext':
arch/powerpc/kernel/signal_64.c:161: warning: array subscript is above array bounds
This is caused by us copying to aliases of elements of the pt_regs
structure. Make those explicit.
This adds one extra __get_user and unrolls a loop.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
| -rw-r--r-- | arch/powerpc/kernel/signal_64.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c index 34f37e59bacc..6e6b01a6db5f 100644 --- a/arch/powerpc/kernel/signal_64.c +++ b/arch/powerpc/kernel/signal_64.c @@ -170,29 +170,29 @@ static long restore_sigcontext(struct pt_regs *regs, sigset_t *set, int sig, #endif unsigned long err = 0; unsigned long save_r13 = 0; - elf_greg_t *gregs = (elf_greg_t *)regs; unsigned long msr; - int i; /* If this is not a signal return, we preserve the TLS in r13 */ if (!sig) save_r13 = regs->gpr[13]; - /* copy everything before MSR */ - err |= __copy_from_user(regs, &sc->gp_regs, - PT_MSR*sizeof(unsigned long)); - + /* copy the GPRs */ + err |= __copy_from_user(regs->gpr, sc->gp_regs, sizeof(regs->gpr)); + err |= __get_user(regs->nip, &sc->gp_regs[PT_NIP]); /* get MSR separately, transfer the LE bit if doing signal return */ err |= __get_user(msr, &sc->gp_regs[PT_MSR]); if (sig) regs->msr = (regs->msr & ~MSR_LE) | (msr & MSR_LE); - + err |= __get_user(regs->orig_gpr3, &sc->gp_regs[PT_ORIG_R3]); + err |= __get_user(regs->ctr, &sc->gp_regs[PT_CTR]); + err |= __get_user(regs->link, &sc->gp_regs[PT_LNK]); + err |= __get_user(regs->xer, &sc->gp_regs[PT_XER]); + err |= __get_user(regs->ccr, &sc->gp_regs[PT_CCR]); /* skip SOFTE */ - for (i = PT_MSR+1; i <= PT_RESULT; i++) { - if (i == PT_SOFTE) - continue; - err |= __get_user(gregs[i], &sc->gp_regs[i]); - } + err |= __get_user(regs->trap, &sc->gp_regs[PT_TRAP]); + err |= __get_user(regs->dar, &sc->gp_regs[PT_DAR]); + err |= __get_user(regs->dsisr, &sc->gp_regs[PT_DSISR]); + err |= __get_user(regs->result, &sc->gp_regs[PT_RESULT]); if (!sig) regs->gpr[13] = save_r13; |