diff options
| -rw-r--r-- | winsup/cygwin/ChangeLog | 4 | ||||
| -rw-r--r-- | winsup/cygwin/miscfuncs.cc | 32 |
2 files changed, 21 insertions, 15 deletions
diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog index 415be6df3..187046931 100644 --- a/winsup/cygwin/ChangeLog +++ b/winsup/cygwin/ChangeLog @@ -1,5 +1,9 @@ 2011-05-15 Corinna Vinschen <corinna@vinschen.de> + * miscfuncs.cc (thread_wrapper): Add comments to assembler code. + +2011-05-15 Corinna Vinschen <corinna@vinschen.de> + * cygwin.din (pthread_attr_getguardsize): Export. (pthread_attr_setguardsize): Export. (pthread_attr_setstack): Export. diff --git a/winsup/cygwin/miscfuncs.cc b/winsup/cygwin/miscfuncs.cc index 0e2945125..73dec4c1a 100644 --- a/winsup/cygwin/miscfuncs.cc +++ b/winsup/cygwin/miscfuncs.cc @@ -421,15 +421,16 @@ thread_wrapper (VOID *arg) + wrapper_arg.stacksize - sizeof (PVOID)); __asm__ ("\n\ - movl %[WRAPPER_ARG], %%ebx \n\ - movl (%%ebx), %%eax \n\ - movl 4(%%ebx), %%ecx \n\ - movl 8(%%ebx), %%edx \n\ - xorl %%ebp, %%ebp \n\ - movl %%edx, %%esp \n\ - pushl %%ecx \n\ - pushl %%eax \n\ - jmp *%%eax \n" : : [WRAPPER_ARG] "r" (&wrapper_arg)); + movl %[WRAPPER_ARG], %%ebx # Load &wrapper_arg into ebx \n\ + movl (%%ebx), %%eax # Load thread func into eax \n\ + movl 4(%%ebx), %%ecx # Load thread arg into ecx \n\ + movl 8(%%ebx), %%edx # Load stackbase into edx \n\ + xorl %%ebp, %%ebp # Set ebp to 0 \n\ + movl %%edx, %%esp # Set esp to stackbase \n\ + pushl %%ecx # Push thread arg onto stack \n\ + pushl %%eax # Push thread func onto stack \n\ + jmp *%%eax # Jump to thread func \n" + : : [WRAPPER_ARG] "r" (&wrapper_arg)); } if (wrapper_arg.guardsize) @@ -446,12 +447,13 @@ thread_wrapper (VOID *arg) system_printf ("VirtualAlloc, %E"); } __asm__ ("\n\ - movl %[WRAPPER_ARG], %%ebx \n\ - movl (%%ebx), %%eax \n\ - movl 4(%%ebx), %%ecx \n\ - pushl %%ecx \n\ - pushl %%eax \n\ - jmp *%%eax \n" : : [WRAPPER_ARG] "r" (&wrapper_arg)); + movl %[WRAPPER_ARG], %%ebx # Load &wrapper_arg into ebx \n\ + movl (%%ebx), %%eax # Load thread func into eax \n\ + movl 4(%%ebx), %%ecx # Load thread arg into ecx \n\ + pushl %%ecx # Push thread arg onto stack \n\ + pushl %%eax # Push thread func onto stack \n\ + jmp *%%eax # Jump to thread func \n" + : : [WRAPPER_ARG] "r" (&wrapper_arg)); /* Never reached. */ return ERROR_INVALID_FUNCTION; } |