Fix several typos

doc/callcc.qbk

@@ -415,7 +415,7 @@ performance than __ucontext__
 
 [note Because the TIB (thread information block on Windows) is not fully
 described in the MSDN, it might be possible that not all required TIB-parts are
-swapped. Using WinFiber implementation migh be an alternative.]
+swapped. Using WinFiber implementation might be an alternative.]
 
 
 [heading ucontext_t]

doc/context.qbk

@@ -10,7 +10,7 @@
     [authors [Kowalke, Oliver]]
     [copyright 2014 Oliver Kowalke]
     [id context]
-    [purpose C++ Library for swiching different user ctx]
+    [purpose C++ Library for switching different user ctx]
     [category text]
     [license
         Distributed under the Boost Software License, Version 1.0.

doc/context.xml

@@ -18,7 +18,7 @@
       </para>
     </legalnotice>
     <librarypurpose>
-      C++ Library for swiching different user ctx
+      C++ Library for switching different user ctx
     </librarypurpose>
     <librarycategory name="category:text"></librarycategory>
   </libraryinfo>
@@ -619,7 +619,7 @@
         <para>
           Because the TIB (thread information block on Windows) is not fully described
           in the MSDN, it might be possible that not all required TIB-parts are swapped.
-          Using WinFiber implementation migh be an alternative.
+          Using WinFiber implementation might be an alternative.
         </para>
       </note>
       <bridgehead renderas="sect4" id="context.ff.implementations__fcontext_t__ucontext_t_and_winfiber.h1">
@@ -1707,7 +1707,7 @@
         <para>
           Because the TIB (thread information block on Windows) is not fully described
           in the MSDN, it might be possible that not all required TIB-parts are swapped.
-          Using WinFiber implementation migh be an alternative.
+          Using WinFiber implementation might be an alternative.
         </para>
       </note>
       <bridgehead renderas="sect4" id="context.cc.implementations__fcontext_t__ucontext_t_and_winfiber.h1">
@@ -2611,7 +2611,7 @@
               time that <code><phrase role="special">*</phrase><phrase role="keyword">this</phrase></code>
               needs to allocate system memory. The third argument <code><phrase role="identifier">max_size</phrase></code>
               controls how many memory might be allocated for stacks - a value of
-              zero means no uper limit.
+              zero means no upper limit.
             </para>
           </listitem>
         </varlistentry>
@@ -2942,7 +2942,7 @@
       <title><link linkend="context.stack.stack_traits">Class <emphasis>stack_traits</emphasis></link></title>
       <para>
         <emphasis>stack_traits</emphasis> models a <emphasis>stack-traits</emphasis>
-        providing a way to access certain properites defined by the enironment. Stack
+        providing a way to access certain properties defined by the environment. Stack
         allocators use <emphasis>stack-traits</emphasis> to allocate stacks.
       </para>
 <programlisting><phrase role="preprocessor">#include</phrase> <phrase role="special">&lt;</phrase><phrase role="identifier">boost</phrase><phrase role="special">/</phrase><phrase role="identifier">context</phrase><phrase role="special">/</phrase><phrase role="identifier">stack_traits</phrase><phrase role="special">.</phrase><phrase role="identifier">hpp</phrase><phrase role="special">&gt;</phrase>
@@ -3172,7 +3172,7 @@
         Sanitizers (GCC/Clang) are confused by the stack switches. The library is
         required to be compiled with property (b2 command-line) <code><phrase role="identifier">context</phrase><phrase
         role="special">-</phrase><phrase role="identifier">impl</phrase><phrase role="special">=</phrase><phrase
-        role="identifier">ucontext</phrase></code> and compilers santizer options.
+        role="identifier">ucontext</phrase></code> and compilers sanitizer options.
         Users must define <code><phrase role="identifier">BOOST_USE_ASAN</phrase></code>
         before including any Boost.Context headers when linking against Boost binaries.
       </para>

doc/fiber.qbk

@@ -399,7 +399,7 @@ performance than __ucontext__
 
 [note Because the TIB (thread information block on Windows) is not fully
 described in the MSDN, it might be possible that not all required TIB-parts are
-swapped. Using WinFiber implementation migh be an alternative.]
+swapped. Using WinFiber implementation might be an alternative.]
 
 
 [heading ucontext_t]

doc/html/context/cc/implementations__fcontext_t__ucontext_t_and_winfiber.html

@@ -46,7 +46,7 @@
 <tr><td align="left" valign="top"><p>
           Because the TIB (thread information block on Windows) is not fully described
           in the MSDN, it might be possible that not all required TIB-parts are swapped.
-          Using WinFiber implementation migh be an alternative.
+          Using WinFiber implementation might be an alternative.
         </p></td></tr>
 </table></div>
 <h5>

doc/html/context/ecv1.html

@@ -851,7 +851,7 @@
 <div class="variablelist">
 <p class="title"><b></b></p>
 <dl>
-<dt><span class="term">Efects:</span></dt>
+<dt><span class="term">Effects:</span></dt>
 <dd><p>
             Writes the representation of <code class="computeroutput"><span class="identifier">other</span></code>
             to stream <code class="computeroutput"><span class="identifier">os</span></code>.

doc/html/context/ecv2.html

@@ -120,7 +120,7 @@
       on <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>)
       and <code class="computeroutput"><span class="identifier">args</span></code> are the data passed
       to <span class="emphasis"><em>execution_context::operator()</em></span>. The return value represents
-      the execution_context that has to be resumed, after termiantion of this context.
+      the execution_context that has to be resumed, after termination of this context.
     </p>
 <p>
       Benefits of <a class="link" href="ecv2.html#ecv2"><span class="emphasis"><em>execution_context</em></span> (v2)</a>
@@ -780,7 +780,7 @@
 <div class="variablelist">
 <p class="title"><b></b></p>
 <dl>
-<dt><span class="term">Efects:</span></dt>
+<dt><span class="term">Effects:</span></dt>
 <dd><p>
             Writes the representation of <code class="computeroutput"><span class="identifier">other</span></code>
             to stream <code class="computeroutput"><span class="identifier">os</span></code>.

doc/html/context/ff/implementations__fcontext_t__ucontext_t_and_winfiber.html

@@ -46,7 +46,7 @@
 <tr><td align="left" valign="top"><p>
           Because the TIB (thread information block on Windows) is not fully described
           in the MSDN, it might be possible that not all required TIB-parts are swapped.
-          Using WinFiber implementation migh be an alternative.
+          Using WinFiber implementation might be an alternative.
         </p></td></tr>
 </table></div>
 <h5>

doc/html/context/fib/implementations__fcontext_t__ucontext_t_and_winfiber.html

@@ -46,7 +46,7 @@
 <tr><td align="left" valign="top"><p>
           Because the TIB (thread information block on Windows) is not fully described
           in the MSDN, it might be possible that not all required TIB-parts are swapped.
-          Using WinFiber implementation migh be an alternative.
+          Using WinFiber implementation might be an alternative.
         </p></td></tr>
 </table></div>
 <h5>

doc/html/context/stack/pooled_fixedsize.html

@@ -73,7 +73,7 @@
               time that <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>
               needs to allocate system memory. The third argument <code class="computeroutput"><span class="identifier">max_size</span></code>
               controls how many memory might be allocated for stacks - a value of
-              zero means no uper limit.
+              zero means no upper limit.
             </p></dd>
 </dl>
 </div>

doc/html/context/stack/sanitizers.html

@@ -28,7 +28,7 @@
 </h3></div></div></div>
 <p>
         Sanitizers (GCC/Clang) are confused by the stack switches. The library is
-        required to be compiled with property (b2 command-line) <code class="computeroutput"><span class="identifier">context</span><span class="special">-</span><span class="identifier">impl</span><span class="special">=</span><span class="identifier">ucontext</span></code> and compilers santizer options.
+        required to be compiled with property (b2 command-line) <code class="computeroutput"><span class="identifier">context</span><span class="special">-</span><span class="identifier">impl</span><span class="special">=</span><span class="identifier">ucontext</span></code> and compilers sanitizer options.
         Users must define <code class="computeroutput"><span class="identifier">BOOST_USE_ASAN</span></code>
         before including any Boost.Context headers when linking against Boost binaries.
       </p>

doc/html/context/stack/stack_traits.html

@@ -28,7 +28,7 @@
 </h3></div></div></div>
 <p>
         <span class="emphasis"><em>stack_traits</em></span> models a <span class="emphasis"><em>stack-traits</em></span>
-        providing a way to access certain properites defined by the enironment. Stack
+        providing a way to access certain properties defined by the environment. Stack
         allocators use <span class="emphasis"><em>stack-traits</em></span> to allocate stacks.
       </p>
 <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">context</span><span class="special">/</span><span class="identifier">stack_traits</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>

doc/stack.qbk

@@ -131,7 +131,7 @@ stack grows downwards/upwards) the stored address is the highest/lowest
 address of the stack. Argument `next_size` determines the number of stacks to
 request from the system the first time that `*this` needs to allocate system
 memory. The third argument `max_size` controls how many memory might be
-allocated for stacks - a value of zero means no uper limit.]]
+allocated for stacks - a value of zero means no upper limit.]]
 ]
 
 [heading `stack_context allocate()`]
@@ -256,7 +256,7 @@ available stack allocator.]
 [section:stack_traits Class ['stack_traits]]
 
 ['stack_traits] models a __stack_traits__ providing a way to access certain
-properites defined by the enironment. Stack allocators use __stack_traits__ to
+properties defined by the environment. Stack allocators use __stack_traits__ to
 allocate stacks.
 
         #include <boost/context/stack_traits.hpp>
@@ -357,7 +357,7 @@ compiled with `valgrind=on`.
 
 Sanitizers (GCC/Clang) are confused by the stack switches.
 The library is required to be compiled with property (b2 command-line)
-`context-impl=ucontext` and compilers santizer options.
+`context-impl=ucontext` and compilers sanitizer options.
 Users must define `BOOST_USE_ASAN` before including any Boost.Context headers
 when linking against Boost binaries.
 

include/boost/context/continuation_fcontext.hpp

@@ -74,7 +74,7 @@ template< typename Rec >
 transfer_t context_exit( transfer_t t) noexcept {
     Rec * rec = static_cast< Rec * >( t.data);
 #if BOOST_CONTEXT_SHADOW_STACK
-    // destory shadow stack
+    // destroy shadow stack
     std::size_t ss_size = *((unsigned long*)(reinterpret_cast< uintptr_t >( rec)- 16));
     long unsigned int ss_base = *((unsigned long*)(reinterpret_cast< uintptr_t >( rec)- 8));
     munmap((void *)ss_base, ss_size);
@@ -174,7 +174,7 @@ fcontext_t create_context1( StackAlloc && salloc, Fn && fn) {
 	void * storage = reinterpret_cast< void * >(
 			( reinterpret_cast< uintptr_t >( sctx.sp) - static_cast< uintptr_t >( sizeof( Record) ) )
             & ~static_cast< uintptr_t >( 0xff) );
-    // placment new for control structure on context stack
+    // placement new for control structure on context stack
     Record * record = new ( storage) Record{
             sctx, std::forward< StackAlloc >( salloc), std::forward< Fn >( fn) };
     // 64byte gab between control structure and stack top
@@ -216,7 +216,7 @@ fcontext_t create_context2( preallocated palloc, StackAlloc && salloc, Fn && fn)
     void * storage = reinterpret_cast< void * >(
             ( reinterpret_cast< uintptr_t >( palloc.sp) - static_cast< uintptr_t >( sizeof( Record) ) )
             & ~ static_cast< uintptr_t >( 0xff) );
-    // placment new for control structure on context-stack
+    // placement new for control structure on context-stack
     Record * record = new ( storage) Record{
             palloc.sctx, std::forward< StackAlloc >( salloc), std::forward< Fn >( fn) };
     // 64byte gab between control structure and stack top

include/boost/context/continuation_ucontext.hpp

@@ -287,7 +287,7 @@ static activation_record * create_context1( StackAlloc && salloc, Fn && fn) {
     void * storage = reinterpret_cast< void * >(
             ( reinterpret_cast< uintptr_t >( sctx.sp) - static_cast< uintptr_t >( sizeof( capture_t) ) )
             & ~ static_cast< uintptr_t >( 0xff) );
-    // placment new for control structure on context stack
+    // placement new for control structure on context stack
     capture_t * record = new ( storage) capture_t{
             sctx, std::forward< StackAlloc >( salloc), std::forward< Fn >( fn) };
     // stack bottom
@@ -330,7 +330,7 @@ static activation_record * create_context2( preallocated palloc, StackAlloc && s
     void * storage = reinterpret_cast< void * >(
             ( reinterpret_cast< uintptr_t >( palloc.sp) - static_cast< uintptr_t >( sizeof( capture_t) ) )
             & ~ static_cast< uintptr_t >( 0xff) );
-    // placment new for control structure on context stack
+    // placement new for control structure on context stack
     capture_t * record = new ( storage) capture_t{
             palloc.sctx, std::forward< StackAlloc >( salloc), std::forward< Fn >( fn) };
     // stack bottom

include/boost/context/continuation_winfib.hpp

@@ -251,7 +251,7 @@ static activation_record * create_context1( StackAlloc && salloc, Fn && fn) {
     void * storage = reinterpret_cast< void * >(
             ( reinterpret_cast< uintptr_t >( sctx.sp) - static_cast< uintptr_t >( sizeof( capture_t) ) )
             & ~ static_cast< uintptr_t >( 0xff) );
-    // placment new for control structure on context stack
+    // placement new for control structure on context stack
     capture_t * record = new ( storage) capture_t{
             sctx, std::forward< StackAlloc >( salloc), std::forward< Fn >( fn) };
     // create user-context
@@ -268,7 +268,7 @@ static activation_record * create_context2( preallocated palloc, StackAlloc && s
     void * storage = reinterpret_cast< void * >(
             ( reinterpret_cast< uintptr_t >( palloc.sp) - static_cast< uintptr_t >( sizeof( capture_t) ) )
             & ~ static_cast< uintptr_t >( 0xff) );
-    // placment new for control structure on context stack
+    // placement new for control structure on context stack
     capture_t * record = new ( storage) capture_t{
             palloc.sctx, std::forward< StackAlloc >( salloc), std::forward< Fn >( fn) };
     // create user-context

include/boost/context/detail/config.hpp

@@ -67,7 +67,7 @@
 #if defined(__cpp_lib_integer_sequence) && __cpp_lib_integer_sequence >= 201304
 # undef BOOST_CONTEXT_NO_CXX14_INTEGER_SEQUENCE
 #endif
-// workaroud: MSVC 14 does not provide macros to test for compile-time integer sequence
+// workaround: MSVC 14 does not provide macros to test for compile-time integer sequence
 #if _MSC_VER > 1800 // _MSC_VER == 1800 -> MS Visual Studio 2013
 # undef BOOST_CONTEXT_NO_INDEX_SEQUENCE
 #endif
@@ -78,7 +78,7 @@
 # endif
 #endif
 
-// workaroud: MSVC 14 does support constexpr
+// workaround: MSVC 14 does support constexpr
 #if _MSC_VER > 1800 // _MSC_VER == 1800 -> MS Visual Studio 2013
 # undef BOOST_NO_CXX11_CONSTEXPR
 #endif
@@ -112,7 +112,7 @@
 // modern architectures have cachelines with 64byte length
 // ARM Cortex-A15 32/64byte, Cortex-A9 16/32/64bytes
 // MIPS 74K: 32byte, 4KEc: 16byte
-// ist should be safe to use 64byte for all
+// it should be safe to use 64byte for all
 static constexpr std::size_t cache_alignment{ 64 };
 static constexpr std::size_t cacheline_length{ 64 };
 // lookahead size for prefetching

include/boost/context/fiber_fcontext.hpp

@@ -123,7 +123,7 @@ template< typename Rec >
 transfer_t fiber_exit( transfer_t t) noexcept {
     Rec * rec = static_cast< Rec * >( t.data);
 #if BOOST_CONTEXT_SHADOW_STACK
-    // destory shadow stack
+    // destroy shadow stack
     std::size_t ss_size = *((unsigned long*)(reinterpret_cast< uintptr_t >( rec)- 16));
     long unsigned int ss_base = *((unsigned long*)(reinterpret_cast< uintptr_t >( rec)- 8));
     munmap((void *)ss_base, ss_size);
@@ -220,7 +220,7 @@ fcontext_t create_fiber1( StackAlloc && salloc, Fn && fn) {
     void * storage = reinterpret_cast< void * >(
             ( reinterpret_cast< uintptr_t >( sctx.sp) - static_cast< uintptr_t >( sizeof( Record) ) )
             & ~static_cast< uintptr_t >( 0xff) );
-    // placment new for control structure on context stack
+    // placement new for control structure on context stack
     Record * record = new ( storage) Record{
             sctx, std::forward< StackAlloc >( salloc), std::forward< Fn >( fn) };
     // 64byte gab between control structure and stack top
@@ -262,7 +262,7 @@ fcontext_t create_fiber2( preallocated palloc, StackAlloc && salloc, Fn && fn) {
     void * storage = reinterpret_cast< void * >(
             ( reinterpret_cast< uintptr_t >( palloc.sp) - static_cast< uintptr_t >( sizeof( Record) ) )
             & ~ static_cast< uintptr_t >( 0xff) );
-    // placment new for control structure on context-stack
+    // placwment new for control structure on context-stack
     Record * record = new ( storage) Record{
             palloc.sctx, std::forward< StackAlloc >( salloc), std::forward< Fn >( fn) };
     // 64byte gab between control structure and stack top

include/boost/context/fiber_ucontext.hpp

@@ -312,7 +312,7 @@ static fiber_activation_record * create_fiber1( StackAlloc && salloc, Fn && fn)
     void * storage = reinterpret_cast< void * >(
             ( reinterpret_cast< uintptr_t >( sctx.sp) - static_cast< uintptr_t >( sizeof( capture_t) ) )
             & ~ static_cast< uintptr_t >( 0xff) );
-    // placment new for control structure on context stack
+    // placement new for control structure on context stack
     capture_t * record = new ( storage) capture_t{
             sctx, std::forward< StackAlloc >( salloc), std::forward< Fn >( fn) };
     // stack bottom
@@ -363,7 +363,7 @@ static fiber_activation_record * create_fiber2( preallocated palloc, StackAlloc
     void * storage = reinterpret_cast< void * >(
             ( reinterpret_cast< uintptr_t >( palloc.sp) - static_cast< uintptr_t >( sizeof( capture_t) ) )
             & ~ static_cast< uintptr_t >( 0xff) );
-    // placment new for control structure on context stack
+    // placement new for control structure on context stack
     capture_t * record = new ( storage) capture_t{
             palloc.sctx, std::forward< StackAlloc >( salloc), std::forward< Fn >( fn) };
     // stack bottom

include/boost/context/fiber_winfib.hpp

@@ -250,7 +250,7 @@ static fiber_activation_record * create_fiber1( StackAlloc && salloc, Fn && fn)
     void * storage = reinterpret_cast< void * >(
             ( reinterpret_cast< uintptr_t >( sctx.sp) - static_cast< uintptr_t >( sizeof( capture_t) ) )
             & ~ static_cast< uintptr_t >( 0xff) );
-    // placment new for control structure on context stack
+    // placement new for control structure on context stack
     capture_t * record = new ( storage) capture_t{
             sctx, std::forward< StackAlloc >( salloc), std::forward< Fn >( fn) };
     // create user-context
@@ -267,7 +267,7 @@ static fiber_activation_record * create_fiber2( preallocated palloc, StackAlloc
     void * storage = reinterpret_cast< void * >(
             ( reinterpret_cast< uintptr_t >( palloc.sp) - static_cast< uintptr_t >( sizeof( capture_t) ) )
             & ~ static_cast< uintptr_t >( 0xff) );
-    // placment new for control structure on context stack
+    // placement new for control structure on context stack
     capture_t * record = new ( storage) capture_t{
             palloc.sctx, std::forward< StackAlloc >( salloc), std::forward< Fn >( fn) };
     // create user-context

src/asm/make_i386_ms_pe_clang_gas.S

@@ -62,7 +62,7 @@ _make_fcontext:
     movl  %ecx, 0x14(%eax)
     /* second arg of make_fcontext() == size of context-stack */
     movl  0x8(%esp), %edx
-    /* negate stack size for LEA instruction (== substraction) */
+    /* negate stack size for LEA instruction (== subtraction) */
     negl  %edx
     /* compute bottom address of context stack (limit) */
     leal  (%ecx,%edx), %ecx
@@ -94,7 +94,7 @@ _make_fcontext:
     /* traverse current seh chain to get the last exception handler installed by Windows */
     /* note that on Windows Server 2008 and 2008 R2, SEHOP is activated by default */
     /* the exception handler chain is tested for the presence of ntdll.dll!FinalExceptionHandler */
-    /* at its end by RaiseException all seh andlers are disregarded if not present and the */
+    /* at its end by RaiseException all seh handlers are disregarded if not present and the */
     /* program is aborted */
     /* load NT_TIB into ECX */
     movl  %fs:(0x0), %ecx

src/asm/make_i386_ms_pe_gas.asm

@@ -62,7 +62,7 @@ _make_fcontext:
     movl  %ecx, 0x14(%eax)
     /* second arg of make_fcontext() == size of context-stack */
     movl  0x8(%esp), %edx
-    /* negate stack size for LEA instruction (== substraction) */
+    /* negate stack size for LEA instruction (== subtraction) */
     negl  %edx
     /* compute bottom address of context stack (limit) */
     leal  (%ecx,%edx), %ecx
@@ -94,7 +94,7 @@ _make_fcontext:
     /* traverse current seh chain to get the last exception handler installed by Windows */
     /* note that on Windows Server 2008 and 2008 R2, SEHOP is activated by default */
     /* the exception handler chain is tested for the presence of ntdll.dll!FinalExceptionHandler */
-    /* at its end by RaiseException all seh andlers are disregarded if not present and the */
+    /* at its end by RaiseException all seh handlers are disregarded if not present and the */
     /* program is aborted */
     /* load NT_TIB into ECX */
     movl  %fs:(0x0), %ecx

src/asm/make_i386_ms_pe_masm.asm

@@ -53,7 +53,7 @@ make_fcontext PROC BOOST_CONTEXT_EXPORT
     mov  [eax+014h], ecx
     ; second arg of make_fcontext() == size of context-stack
     mov  edx, [esp+08h]
-    ; negate stack size for LEA instruction (== substraction)
+    ; negate stack size for LEA instruction (== subtraction)
     neg  edx
     ; compute bottom address of context stack (limit)
     lea  ecx, [ecx+edx]

src/asm/make_mips64_n64_elf_gas.S

@@ -70,7 +70,7 @@ make_fcontext:
     # save global pointer in context-data
     sd  $gp, 136($v0)
 
-    # psudo instruction compute abs address of label finish based on GP
+    # pseudo instruction compute abs address of label finish based on GP
     dla  $t9, finish
 
     # save address of finish as return-address for context-function

src/asm/make_sparc64_sysv_elf_gas.S

@@ -45,7 +45,7 @@ make_fcontext:
 	add	%l0, (trampoline - 1b - 8), %l0
 	stx	%l0, [%i0 + I7]
 
-	# Save framepointer to first stack frame but first substract the BIAS
+	# Save framepointer to first stack frame but first subtract the BIAS
 	add	%i0, CC64FSZ - BIAS, %l0
 	stx	%l0, [%i0 + SP]
 

src/asm/make_x86_64_ms_pe_clang_gas.S

@@ -113,7 +113,7 @@ make_fcontext:
     /* save top address of context stack as 'base' */
     movq  %rcx, 0xc8(%rax)
     /* second arg of make_fcontext() == size of context-stack */
-    /* negate stack size for LEA instruction (== substraction) */
+    /* negate stack size for LEA instruction (== subtraction) */
     negq  %rdx
     /* compute bottom address of context stack (limit) */
     leaq  (%rcx,%rdx), %rcx

src/asm/make_x86_64_ms_pe_gas.asm

@@ -113,7 +113,7 @@ make_fcontext:
     /* save top address of context stack as 'base' */
     movq  %rcx, 0xc8(%rax)
     /* second arg of make_fcontext() == size of context-stack */
-    /* negate stack size for LEA instruction (== substraction) */
+    /* negate stack size for LEA instruction (== subtraction) */
     negq  %rdx
     /* compute bottom address of context stack (limit) */
     leaq  (%rcx,%rdx), %rcx

src/asm/make_x86_64_ms_pe_masm.asm

@@ -110,7 +110,7 @@ make_fcontext PROC BOOST_CONTEXT_EXPORT FRAME
     ; save top address of context stack as 'base'
     mov  [rax+0c8h], rcx
     ; second arg of make_fcontext() == size of context-stack
-    ; negate stack size for LEA instruction (== substraction)
+    ; negate stack size for LEA instruction (== subtraction)
     neg  rdx
     ; compute bottom address of context stack (limit)
     lea  rcx, [rcx+rdx]

test/test_callcc.cpp

@@ -479,7 +479,7 @@ void test_badcatch() {
         BOOST_CHECK_EQUAL( 3., value3);
         // the destruction of ctx here will cause a forced_unwind to be thrown that is not caught
         // in fn19.  That will trigger the "not caught" assertion in ~forced_unwind.  Getting that
-        // assertion to propogate bak here cleanly is non-trivial, and there seems to not be a good
+        // assertion to propagate back here cleanly is non-trivial, and there seems to not be a good
         // way to hook directly into the assertion when it happens on an alternate stack.
         std::move( c);
     }

test/test_fiber.cpp

@@ -501,7 +501,7 @@ void test_badcatch() {
         BOOST_CHECK_EQUAL( 3., value3);
         // the destruction of ctx here will cause a forced_unwind to be thrown that is not caught
         // in fn19.  That will trigger the "not caught" assertion in ~forced_unwind.  Getting that
-        // assertion to propogate bak here cleanly is non-trivial, and there seems to not be a good
+        // assertion to propagate back here cleanly is non-trivial, and there seems to not be a good
         // way to hook directly into the assertion when it happens on an alternate stack.
         std::move( f);
     }