From 9999e48639b3cecb08ffb37358bcba3b48161b29 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 08:50:17 +0000
Subject: [PATCH] add ax88772_rst
---
kernel/arch/mips/kernel/signal.c | 74 +++++++++++++++++++++++++++----------
1 files changed, 54 insertions(+), 20 deletions(-)
diff --git a/kernel/arch/mips/kernel/signal.c b/kernel/arch/mips/kernel/signal.c
index 109ed16..f1e9851 100644
--- a/kernel/arch/mips/kernel/signal.c
+++ b/kernel/arch/mips/kernel/signal.c
@@ -52,7 +52,7 @@
/* Matches struct ucontext from its uc_mcontext field onwards */
struct sigcontext sf_sc;
sigset_t sf_mask;
- unsigned long long sf_extcontext[0];
+ unsigned long long sf_extcontext[];
};
struct rt_sigframe {
@@ -61,6 +61,8 @@
struct siginfo rs_info;
struct ucontext rs_uc;
};
+
+#ifdef CONFIG_MIPS_FP_SUPPORT
/*
* Thread saved context copy to/from a signal context presumed to be on the
@@ -104,6 +106,20 @@
return err;
}
+#else /* !CONFIG_MIPS_FP_SUPPORT */
+
+static int copy_fp_to_sigcontext(void __user *sc)
+{
+ return 0;
+}
+
+static int copy_fp_from_sigcontext(void __user *sc)
+{
+ return 0;
+}
+
+#endif /* !CONFIG_MIPS_FP_SUPPORT */
+
/*
* Wrappers for the assembly _{save,restore}_fp_context functions.
*/
@@ -141,6 +157,8 @@
uc = container_of(sc, struct ucontext, uc_mcontext);
return &uc->uc_extcontext;
}
+
+#ifdef CONFIG_CPU_HAS_MSA
static int save_msa_extcontext(void __user *buf)
{
@@ -195,9 +213,6 @@
unsigned int csr;
int i, err;
- if (!IS_ENABLED(CONFIG_CPU_HAS_MSA))
- return SIGSYS;
-
if (size != sizeof(*msa))
return -EINVAL;
@@ -233,6 +248,20 @@
return err;
}
+
+#else /* !CONFIG_CPU_HAS_MSA */
+
+static int save_msa_extcontext(void __user *buf)
+{
+ return 0;
+}
+
+static int restore_msa_extcontext(void __user *buf, unsigned int size)
+{
+ return SIGSYS;
+}
+
+#endif /* !CONFIG_CPU_HAS_MSA */
static int save_extcontext(void __user *buf)
{
@@ -516,6 +545,12 @@
return err ?: protected_restore_fp_context(sc);
}
+#ifdef CONFIG_WAR_ICACHE_REFILLS
+#define SIGMASK ~(cpu_icache_line_size()-1)
+#else
+#define SIGMASK ALMASK
+#endif
+
void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs,
size_t frame_size)
{
@@ -536,7 +571,7 @@
sp = sigsp(sp, ksig);
- return (void __user *)((sp - frame_size) & (ICACHE_REFILLS_WORKAROUND_WAR ? ~(cpu_icache_line_size()-1) : ALMASK));
+ return (void __user *)((sp - frame_size) & SIGMASK);
}
/*
@@ -561,7 +596,7 @@
if (act) {
old_sigset_t mask;
- if (!access_ok(VERIFY_READ, act, sizeof(*act)))
+ if (!access_ok(act, sizeof(*act)))
return -EFAULT;
err |= __get_user(new_ka.sa.sa_handler, &act->sa_handler);
err |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
@@ -575,7 +610,7 @@
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
- if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
+ if (!access_ok(oact, sizeof(*oact)))
return -EFAULT;
err |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
err |= __put_user(old_ka.sa.sa_handler, &oact->sa_handler);
@@ -601,7 +636,7 @@
regs = current_pt_regs();
frame = (struct sigframe __user *)regs->regs[29];
- if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+ if (!access_ok(frame, sizeof(*frame)))
goto badframe;
if (__copy_from_user(&blocked, &frame->sf_mask, sizeof(blocked)))
goto badframe;
@@ -612,7 +647,7 @@
if (sig < 0)
goto badframe;
else if (sig)
- force_sig(sig, current);
+ force_sig(sig);
/*
* Don't let your children do this ...
@@ -625,7 +660,7 @@
/* Unreached */
badframe:
- force_sig(SIGSEGV, current);
+ force_sig(SIGSEGV);
}
#endif /* CONFIG_TRAD_SIGNALS */
@@ -638,7 +673,7 @@
regs = current_pt_regs();
frame = (struct rt_sigframe __user *)regs->regs[29];
- if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+ if (!access_ok(frame, sizeof(*frame)))
goto badframe;
if (__copy_from_user(&set, &frame->rs_uc.uc_sigmask, sizeof(set)))
goto badframe;
@@ -649,7 +684,7 @@
if (sig < 0)
goto badframe;
else if (sig)
- force_sig(sig, current);
+ force_sig(sig);
if (restore_altstack(&frame->rs_uc.uc_stack))
goto badframe;
@@ -665,7 +700,7 @@
/* Unreached */
badframe:
- force_sig(SIGSEGV, current);
+ force_sig(SIGSEGV);
}
#ifdef CONFIG_TRAD_SIGNALS
@@ -676,7 +711,7 @@
int err = 0;
frame = get_sigframe(ksig, regs, sizeof(*frame));
- if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
+ if (!access_ok(frame, sizeof (*frame)))
return -EFAULT;
err |= setup_sigcontext(regs, &frame->sf_sc);
@@ -715,7 +750,7 @@
int err = 0;
frame = get_sigframe(ksig, regs, sizeof(*frame));
- if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
+ if (!access_ok(frame, sizeof (*frame)))
return -EFAULT;
/* Create siginfo. */
@@ -795,7 +830,7 @@
regs->regs[2] = EINTR;
break;
}
- /* fallthrough */
+ fallthrough;
case ERESTARTNOINTR:
regs->regs[7] = regs->regs[26];
regs->regs[2] = regs->regs[0];
@@ -868,11 +903,10 @@
uprobe_notify_resume(regs);
/* deal with pending signal delivery */
- if (thread_info_flags & _TIF_SIGPENDING)
+ if (thread_info_flags & (_TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL))
do_signal(regs);
if (thread_info_flags & _TIF_NOTIFY_RESUME) {
- clear_thread_flag(TIF_NOTIFY_RESUME);
tracehook_notify_resume(regs);
rseq_handle_notify_resume(NULL, regs);
}
@@ -880,7 +914,7 @@
user_enter();
}
-#ifdef CONFIG_SMP
+#if defined(CONFIG_SMP) && defined(CONFIG_MIPS_FP_SUPPORT)
static int smp_save_fp_context(void __user *sc)
{
return raw_cpu_has_fpu
@@ -908,7 +942,7 @@
(offsetof(struct rt_sigframe, rs_uc.uc_extcontext) -
offsetof(struct rt_sigframe, rs_uc.uc_mcontext)));
-#ifdef CONFIG_SMP
+#if defined(CONFIG_SMP) && defined(CONFIG_MIPS_FP_SUPPORT)
/* For now just do the cpu_has_fpu check when the functions are invoked */
save_fp_context = smp_save_fp_context;
restore_fp_context = smp_restore_fp_context;
--
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