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https://gitlab.winehq.org/wine/wine-staging.git
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98 lines
4.0 KiB
Diff
98 lines
4.0 KiB
Diff
From 6836700fb6d9e0221de770c8b020822b6f4c9b55 Mon Sep 17 00:00:00 2001
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From: Andrew Wesie <awesie@gmail.com>
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Date: Fri, 24 Apr 2020 14:55:14 -0500
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Subject: [PATCH] ntdll: Track if a WRITECOPY page has been modified.
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Once a WRITECOPY page is modified, it should be mapped as if it is a normal
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read-write page.
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Signed-off-by: Andrew Wesie <awesie@gmail.com>
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---
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dlls/ntdll/unix/virtual.c | 25 +++++++++++++++++++------
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1 file changed, 19 insertions(+), 6 deletions(-)
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diff --git a/dlls/ntdll/unix/virtual.c b/dlls/ntdll/unix/virtual.c
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index 5a8ba8bae2a..c81104bd266 100644
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--- a/dlls/ntdll/unix/virtual.c
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+++ b/dlls/ntdll/unix/virtual.c
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@@ -97,6 +97,7 @@ struct file_view
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#define VPROT_GUARD 0x10
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#define VPROT_COMMITTED 0x20
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#define VPROT_WRITEWATCH 0x40
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+#define VPROT_WRITTEN 0x80
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/* per-mapping protection flags */
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#define VPROT_SYSTEM 0x0200 /* system view (underlying mmap not under our control) */
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@@ -818,7 +819,7 @@ static int get_unix_prot( BYTE vprot )
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#if defined(__i386__)
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if (vprot & VPROT_WRITECOPY)
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{
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- if (experimental_WRITECOPY())
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+ if (experimental_WRITECOPY() && !(vprot & VPROT_WRITTEN))
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prot = (prot & ~PROT_WRITE) | PROT_READ;
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else
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prot |= PROT_WRITE | PROT_READ;
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@@ -1397,7 +1398,11 @@ static NTSTATUS create_view( struct file_view **view_ret, void *base, size_t siz
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*/
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static DWORD get_win32_prot( BYTE vprot, unsigned int map_prot )
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{
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- DWORD ret = VIRTUAL_Win32Flags[vprot & 0x0f];
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+ DWORD ret;
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+
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+ if ((vprot & VPROT_WRITECOPY) && (vprot & VPROT_WRITTEN))
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+ vprot = (vprot & ~VPROT_WRITECOPY) | VPROT_WRITE;
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+ ret = VIRTUAL_Win32Flags[vprot & 0x0f];
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if (vprot & VPROT_GUARD) ret |= PAGE_GUARD;
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if (map_prot & SEC_NOCACHE) ret |= PAGE_NOCACHE;
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return ret;
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@@ -1508,7 +1513,7 @@ static BOOL set_vprot( struct file_view *view, void *base, size_t size, BYTE vpr
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if (view->protect & VPROT_WRITEWATCH)
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{
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/* each page may need different protections depending on write watch flag */
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- set_page_vprot_bits( base, size, vprot & ~VPROT_WRITEWATCH, ~vprot & ~VPROT_WRITEWATCH );
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+ set_page_vprot_bits( base, size, vprot & ~VPROT_WRITEWATCH, ~vprot & ~(VPROT_WRITEWATCH|VPROT_WRITTEN) );
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mprotect_range( base, size, 0, 0 );
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return TRUE;
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}
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@@ -1524,10 +1529,18 @@ static BOOL set_vprot( struct file_view *view, void *base, size_t size, BYTE vpr
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return TRUE;
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}
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+ /* check that we can map this memory with PROT_WRITE since we cannot fail later */
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+ if (vprot & VPROT_WRITECOPY)
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+ unix_prot |= PROT_WRITE;
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+
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if (mprotect_exec( base, size, unix_prot )) /* FIXME: last error */
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return FALSE;
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- set_page_vprot( base, size, vprot );
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+ /* each page may need different protections depending on writecopy */
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+ set_page_vprot_bits( base, size, vprot, ~vprot & ~VPROT_WRITTEN );
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+ if (vprot & VPROT_WRITECOPY)
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+ mprotect_range( base, size, 0, 0 );
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+
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return TRUE;
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}
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@@ -2774,7 +2787,7 @@ NTSTATUS CDECL virtual_handle_fault( LPCVOID addr, DWORD err, BOOL on_signal_sta
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}
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if (vprot & VPROT_WRITECOPY)
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{
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- set_page_vprot_bits( page, page_size, VPROT_WRITE, VPROT_WRITECOPY );
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+ set_page_vprot_bits( page, page_size, VPROT_WRITE | VPROT_WRITTEN, VPROT_WRITECOPY );
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mprotect_range( page, page_size, 0, 0 );
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}
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/* ignore fault if page is writable now */
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@@ -3660,7 +3673,7 @@ static NTSTATUS get_basic_memory_info( HANDLE process, LPCVOID addr,
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else if (view->protect & (SEC_FILE | SEC_RESERVE | SEC_COMMIT)) info->Type = MEM_MAPPED;
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else info->Type = MEM_PRIVATE;
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for (ptr = base; ptr < base + range_size; ptr += page_size)
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- if ((get_page_vprot( ptr ) ^ vprot) & ~VPROT_WRITEWATCH) break;
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+ if ((get_page_vprot( ptr ) ^ vprot) & ~(VPROT_WRITEWATCH|VPROT_WRITTEN)) break;
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info->RegionSize = ptr - base;
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}
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server_leave_uninterrupted_section( &csVirtual, &sigset );
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--
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2.26.2
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