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Diffstat (limited to 'arch/powerpc/kernel/signal_64.c')
-rw-r--r--arch/powerpc/kernel/signal_64.c63
1 files changed, 39 insertions, 24 deletions
diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c
index f93ec2835a13..42991045349f 100644
--- a/arch/powerpc/kernel/signal_64.c
+++ b/arch/powerpc/kernel/signal_64.c
@@ -103,7 +103,8 @@ static long setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
if (current->thread.used_vr) {
flush_altivec_to_thread(current);
/* Copy 33 vec registers (vr0..31 and vscr) to the stack */
- err |= __copy_to_user(v_regs, current->thread.vr, 33 * sizeof(vector128));
+ err |= __copy_to_user(v_regs, &current->thread.vr_state,
+ 33 * sizeof(vector128));
/* set MSR_VEC in the MSR value in the frame to indicate that sc->v_reg)
* contains valid data.
*/
@@ -121,6 +122,12 @@ static long setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
flush_fp_to_thread(current);
/* copy fpr regs and fpscr */
err |= copy_fpr_to_user(&sc->fp_regs, current);
+
+ /*
+ * Clear the MSR VSX bit to indicate there is no valid state attached
+ * to this context, except in the specific case below where we set it.
+ */
+ msr &= ~MSR_VSX;
#ifdef CONFIG_VSX
/*
* Copy VSX low doubleword to local buffer for formatting,
@@ -195,18 +202,18 @@ static long setup_tm_sigcontexts(struct sigcontext __user *sc,
if (current->thread.used_vr) {
flush_altivec_to_thread(current);
/* Copy 33 vec registers (vr0..31 and vscr) to the stack */
- err |= __copy_to_user(v_regs, current->thread.vr,
+ err |= __copy_to_user(v_regs, &current->thread.vr_state,
33 * sizeof(vector128));
/* If VEC was enabled there are transactional VRs valid too,
* else they're a copy of the checkpointed VRs.
*/
if (msr & MSR_VEC)
err |= __copy_to_user(tm_v_regs,
- current->thread.transact_vr,
+ &current->thread.transact_vr,
33 * sizeof(vector128));
else
err |= __copy_to_user(tm_v_regs,
- current->thread.vr,
+ &current->thread.vr_state,
33 * sizeof(vector128));
/* set MSR_VEC in the MSR value in the frame to indicate
@@ -349,10 +356,10 @@ static long restore_sigcontext(struct pt_regs *regs, sigset_t *set, int sig,
return -EFAULT;
/* Copy 33 vec registers (vr0..31 and vscr) from the stack */
if (v_regs != NULL && (msr & MSR_VEC) != 0)
- err |= __copy_from_user(current->thread.vr, v_regs,
+ err |= __copy_from_user(&current->thread.vr_state, v_regs,
33 * sizeof(vector128));
else if (current->thread.used_vr)
- memset(current->thread.vr, 0, 33 * sizeof(vector128));
+ memset(&current->thread.vr_state, 0, 33 * sizeof(vector128));
/* Always get VRSAVE back */
if (v_regs != NULL)
err |= __get_user(current->thread.vrsave, (u32 __user *)&v_regs[33]);
@@ -374,7 +381,7 @@ static long restore_sigcontext(struct pt_regs *regs, sigset_t *set, int sig,
err |= copy_vsx_from_user(current, v_regs);
else
for (i = 0; i < 32 ; i++)
- current->thread.fpr[i][TS_VSRLOWOFFSET] = 0;
+ current->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = 0;
#endif
return err;
}
@@ -468,14 +475,14 @@ static long restore_tm_sigcontexts(struct pt_regs *regs,
return -EFAULT;
/* Copy 33 vec registers (vr0..31 and vscr) from the stack */
if (v_regs != NULL && tm_v_regs != NULL && (msr & MSR_VEC) != 0) {
- err |= __copy_from_user(current->thread.vr, v_regs,
+ err |= __copy_from_user(&current->thread.vr_state, v_regs,
33 * sizeof(vector128));
- err |= __copy_from_user(current->thread.transact_vr, tm_v_regs,
+ err |= __copy_from_user(&current->thread.transact_vr, tm_v_regs,
33 * sizeof(vector128));
}
else if (current->thread.used_vr) {
- memset(current->thread.vr, 0, 33 * sizeof(vector128));
- memset(current->thread.transact_vr, 0, 33 * sizeof(vector128));
+ memset(&current->thread.vr_state, 0, 33 * sizeof(vector128));
+ memset(&current->thread.transact_vr, 0, 33 * sizeof(vector128));
}
/* Always get VRSAVE back */
if (v_regs != NULL && tm_v_regs != NULL) {
@@ -507,8 +514,8 @@ static long restore_tm_sigcontexts(struct pt_regs *regs,
err |= copy_transact_vsx_from_user(current, tm_v_regs);
} else {
for (i = 0; i < 32 ; i++) {
- current->thread.fpr[i][TS_VSRLOWOFFSET] = 0;
- current->thread.transact_fpr[i][TS_VSRLOWOFFSET] = 0;
+ current->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = 0;
+ current->thread.transact_fp.fpr[i][TS_VSRLOWOFFSET] = 0;
}
}
#endif
@@ -700,12 +707,6 @@ badframe:
int handle_rt_signal64(int signr, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs *regs)
{
- /* Handler is *really* a pointer to the function descriptor for
- * the signal routine. The first entry in the function
- * descriptor is the entry address of signal and the second
- * entry is the TOC value we need to use.
- */
- func_descr_t __user *funct_desc_ptr;
struct rt_sigframe __user *frame;
unsigned long newsp = 0;
long err = 0;
@@ -747,7 +748,7 @@ int handle_rt_signal64(int signr, struct k_sigaction *ka, siginfo_t *info,
goto badframe;
/* Make sure signal handler doesn't get spurious FP exceptions */
- current->thread.fpscr.val = 0;
+ current->thread.fp_state.fpscr = 0;
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
/* Remove TM bits from thread's MSR. The MSR in the sigcontext
* just indicates to userland that we were doing a transaction, but we
@@ -765,18 +766,32 @@ int handle_rt_signal64(int signr, struct k_sigaction *ka, siginfo_t *info,
goto badframe;
regs->link = (unsigned long) &frame->tramp[0];
}
- funct_desc_ptr = (func_descr_t __user *) ka->sa.sa_handler;
/* Allocate a dummy caller frame for the signal handler. */
newsp = ((unsigned long)frame) - __SIGNAL_FRAMESIZE;
err |= put_user(regs->gpr[1], (unsigned long __user *)newsp);
/* Set up "regs" so we "return" to the signal handler. */
- err |= get_user(regs->nip, &funct_desc_ptr->entry);
- /* enter the signal handler in big-endian mode */
+ if (is_elf2_task()) {
+ regs->nip = (unsigned long) ka->sa.sa_handler;
+ regs->gpr[12] = regs->nip;
+ } else {
+ /* Handler is *really* a pointer to the function descriptor for
+ * the signal routine. The first entry in the function
+ * descriptor is the entry address of signal and the second
+ * entry is the TOC value we need to use.
+ */
+ func_descr_t __user *funct_desc_ptr =
+ (func_descr_t __user *) ka->sa.sa_handler;
+
+ err |= get_user(regs->nip, &funct_desc_ptr->entry);
+ err |= get_user(regs->gpr[2], &funct_desc_ptr->toc);
+ }
+
+ /* enter the signal handler in native-endian mode */
regs->msr &= ~MSR_LE;
+ regs->msr |= (MSR_KERNEL & MSR_LE);
regs->gpr[1] = newsp;
- err |= get_user(regs->gpr[2], &funct_desc_ptr->toc);
regs->gpr[3] = signr;
regs->result = 0;
if (ka->sa.sa_flags & SA_SIGINFO) {
generated by cgit v1.2.3 (git 2.46.0) at 2025-11-04 00:02:22 +0000