From 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:44:59 +0000
Subject: [PATCH] gmac get mac form eeprom
---
kernel/arch/x86/kernel/vm86_32.c | 120 ++++++++++++++++++++++++++++--------------------------------
1 files changed, 56 insertions(+), 64 deletions(-)
diff --git a/kernel/arch/x86/kernel/vm86_32.c b/kernel/arch/x86/kernel/vm86_32.c
index 1c03e4a..764573d 100644
--- a/kernel/arch/x86/kernel/vm86_32.c
+++ b/kernel/arch/x86/kernel/vm86_32.c
@@ -98,7 +98,6 @@
struct task_struct *tsk = current;
struct vm86plus_struct __user *user;
struct vm86 *vm86 = current->thread.vm86;
- long err = 0;
/*
* This gets called from entry.S with interrupts disabled, but
@@ -114,37 +113,30 @@
set_flags(regs->pt.flags, VEFLAGS, X86_EFLAGS_VIF | vm86->veflags_mask);
user = vm86->user_vm86;
- if (!access_ok(VERIFY_WRITE, user, vm86->vm86plus.is_vm86pus ?
+ if (!user_access_begin(user, vm86->vm86plus.is_vm86pus ?
sizeof(struct vm86plus_struct) :
- sizeof(struct vm86_struct))) {
- pr_alert("could not access userspace vm86 info\n");
- do_exit(SIGSEGV);
- }
+ sizeof(struct vm86_struct)))
+ goto Efault;
- put_user_try {
- put_user_ex(regs->pt.bx, &user->regs.ebx);
- put_user_ex(regs->pt.cx, &user->regs.ecx);
- put_user_ex(regs->pt.dx, &user->regs.edx);
- put_user_ex(regs->pt.si, &user->regs.esi);
- put_user_ex(regs->pt.di, &user->regs.edi);
- put_user_ex(regs->pt.bp, &user->regs.ebp);
- put_user_ex(regs->pt.ax, &user->regs.eax);
- put_user_ex(regs->pt.ip, &user->regs.eip);
- put_user_ex(regs->pt.cs, &user->regs.cs);
- put_user_ex(regs->pt.flags, &user->regs.eflags);
- put_user_ex(regs->pt.sp, &user->regs.esp);
- put_user_ex(regs->pt.ss, &user->regs.ss);
- put_user_ex(regs->es, &user->regs.es);
- put_user_ex(regs->ds, &user->regs.ds);
- put_user_ex(regs->fs, &user->regs.fs);
- put_user_ex(regs->gs, &user->regs.gs);
+ unsafe_put_user(regs->pt.bx, &user->regs.ebx, Efault_end);
+ unsafe_put_user(regs->pt.cx, &user->regs.ecx, Efault_end);
+ unsafe_put_user(regs->pt.dx, &user->regs.edx, Efault_end);
+ unsafe_put_user(regs->pt.si, &user->regs.esi, Efault_end);
+ unsafe_put_user(regs->pt.di, &user->regs.edi, Efault_end);
+ unsafe_put_user(regs->pt.bp, &user->regs.ebp, Efault_end);
+ unsafe_put_user(regs->pt.ax, &user->regs.eax, Efault_end);
+ unsafe_put_user(regs->pt.ip, &user->regs.eip, Efault_end);
+ unsafe_put_user(regs->pt.cs, &user->regs.cs, Efault_end);
+ unsafe_put_user(regs->pt.flags, &user->regs.eflags, Efault_end);
+ unsafe_put_user(regs->pt.sp, &user->regs.esp, Efault_end);
+ unsafe_put_user(regs->pt.ss, &user->regs.ss, Efault_end);
+ unsafe_put_user(regs->es, &user->regs.es, Efault_end);
+ unsafe_put_user(regs->ds, &user->regs.ds, Efault_end);
+ unsafe_put_user(regs->fs, &user->regs.fs, Efault_end);
+ unsafe_put_user(regs->gs, &user->regs.gs, Efault_end);
+ unsafe_put_user(vm86->screen_bitmap, &user->screen_bitmap, Efault_end);
- put_user_ex(vm86->screen_bitmap, &user->screen_bitmap);
- } put_user_catch(err);
- if (err) {
- pr_alert("could not access userspace vm86 info\n");
- do_exit(SIGSEGV);
- }
+ user_access_end();
preempt_disable();
tsk->thread.sp0 = vm86->saved_sp0;
@@ -159,6 +151,13 @@
lazy_load_gs(vm86->regs32.gs);
regs->pt.ax = retval;
+ return;
+
+Efault_end:
+ user_access_end();
+Efault:
+ pr_alert("could not access userspace vm86 info\n");
+ do_exit(SIGSEGV);
}
static void mark_screen_rdonly(struct mm_struct *mm)
@@ -172,7 +171,7 @@
pte_t *pte;
int i;
- down_write(&mm->mmap_sem);
+ mmap_write_lock(mm);
pgd = pgd_offset(mm, 0xA0000);
if (pgd_none_or_clear_bad(pgd))
goto out;
@@ -198,8 +197,8 @@
}
pte_unmap_unlock(pte, ptl);
out:
- up_write(&mm->mmap_sem);
- flush_tlb_mm_range(mm, 0xA0000, 0xA0000 + 32*PAGE_SIZE, 0UL);
+ mmap_write_unlock(mm);
+ flush_tlb_mm_range(mm, 0xA0000, 0xA0000 + 32*PAGE_SIZE, PAGE_SHIFT, false);
}
@@ -243,6 +242,7 @@
struct kernel_vm86_regs vm86regs;
struct pt_regs *regs = current_pt_regs();
unsigned long err = 0;
+ struct vm86_struct v;
err = security_mmap_addr(0);
if (err) {
@@ -278,39 +278,32 @@
if (vm86->saved_sp0)
return -EPERM;
- if (!access_ok(VERIFY_READ, user_vm86, plus ?
- sizeof(struct vm86_struct) :
- sizeof(struct vm86plus_struct)))
+ if (copy_from_user(&v, user_vm86,
+ offsetof(struct vm86_struct, int_revectored)))
return -EFAULT;
memset(&vm86regs, 0, sizeof(vm86regs));
- get_user_try {
- unsigned short seg;
- get_user_ex(vm86regs.pt.bx, &user_vm86->regs.ebx);
- get_user_ex(vm86regs.pt.cx, &user_vm86->regs.ecx);
- get_user_ex(vm86regs.pt.dx, &user_vm86->regs.edx);
- get_user_ex(vm86regs.pt.si, &user_vm86->regs.esi);
- get_user_ex(vm86regs.pt.di, &user_vm86->regs.edi);
- get_user_ex(vm86regs.pt.bp, &user_vm86->regs.ebp);
- get_user_ex(vm86regs.pt.ax, &user_vm86->regs.eax);
- get_user_ex(vm86regs.pt.ip, &user_vm86->regs.eip);
- get_user_ex(seg, &user_vm86->regs.cs);
- vm86regs.pt.cs = seg;
- get_user_ex(vm86regs.pt.flags, &user_vm86->regs.eflags);
- get_user_ex(vm86regs.pt.sp, &user_vm86->regs.esp);
- get_user_ex(seg, &user_vm86->regs.ss);
- vm86regs.pt.ss = seg;
- get_user_ex(vm86regs.es, &user_vm86->regs.es);
- get_user_ex(vm86regs.ds, &user_vm86->regs.ds);
- get_user_ex(vm86regs.fs, &user_vm86->regs.fs);
- get_user_ex(vm86regs.gs, &user_vm86->regs.gs);
- get_user_ex(vm86->flags, &user_vm86->flags);
- get_user_ex(vm86->screen_bitmap, &user_vm86->screen_bitmap);
- get_user_ex(vm86->cpu_type, &user_vm86->cpu_type);
- } get_user_catch(err);
- if (err)
- return err;
+ vm86regs.pt.bx = v.regs.ebx;
+ vm86regs.pt.cx = v.regs.ecx;
+ vm86regs.pt.dx = v.regs.edx;
+ vm86regs.pt.si = v.regs.esi;
+ vm86regs.pt.di = v.regs.edi;
+ vm86regs.pt.bp = v.regs.ebp;
+ vm86regs.pt.ax = v.regs.eax;
+ vm86regs.pt.ip = v.regs.eip;
+ vm86regs.pt.cs = v.regs.cs;
+ vm86regs.pt.flags = v.regs.eflags;
+ vm86regs.pt.sp = v.regs.esp;
+ vm86regs.pt.ss = v.regs.ss;
+ vm86regs.es = v.regs.es;
+ vm86regs.ds = v.regs.ds;
+ vm86regs.fs = v.regs.fs;
+ vm86regs.gs = v.regs.gs;
+
+ vm86->flags = v.flags;
+ vm86->screen_bitmap = v.screen_bitmap;
+ vm86->cpu_type = v.cpu_type;
if (copy_from_user(&vm86->int_revectored,
&user_vm86->int_revectored,
@@ -369,7 +362,7 @@
preempt_disable();
tsk->thread.sp0 += 16;
- if (static_cpu_has(X86_FEATURE_SEP)) {
+ if (boot_cpu_has(X86_FEATURE_SEP)) {
tsk->thread.sysenter_cs = 0;
refresh_sysenter_cs(&tsk->thread);
}
@@ -381,7 +374,6 @@
mark_screen_rdonly(tsk->mm);
memcpy((struct kernel_vm86_regs *)regs, &vm86regs, sizeof(vm86regs));
- force_iret();
return regs->ax;
}
@@ -583,7 +575,7 @@
return 1; /* we let this handle by the calling routine */
current->thread.trap_nr = trapno;
current->thread.error_code = error_code;
- force_sig(SIGTRAP, current);
+ force_sig(SIGTRAP);
return 0;
}
--
Gitblit v1.6.2