[syslinux:master] PXELINUX: add gPXE PXENV_FILE_EXEC in addition to PXENV_RESTART_TFTP; comments

[syslinux-bot for Gene Cumm]

Commit-ID:  3341e22cf54e2d2da856c82c6f09e8d06b72be72
Gitweb:     http://syslinux.zytor.com/commit/3341e22cf54e2d2da856c82c6f09e8d06b72be72
Author:     Gene Cumm <gene.cumm at gmail.com>
AuthorDate: Sat, 13 Nov 2010 11:22:54 -0500
Committer:  Gene Cumm <gene.cumm at gmail.com>
CommitDate: Sat, 13 Nov 2010 11:22:54 -0500

PXELINUX: add gPXE PXENV_FILE_EXEC in addition to PXENV_RESTART_TFTP; comments

Both of these calls will not return if successful


---
 core/pxelinux.asm |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/core/pxelinux.asm b/core/pxelinux.asm
index 165472d..31741a9 100644
--- a/core/pxelinux.asm
+++ b/core/pxelinux.asm
@@ -366,7 +366,9 @@ pxenv:
 		pushad
 
 		; We may be removing ourselves from memory
-		cmp bx,0073h
+		cmp bx,0073h		; PXENV_RESTART_TFTP
+		jz .disable_timer
+		cmp bx,00E5h		; gPXE PXENV_FILE_EXEC
 		jz .disable_timer
 		jmp .store_stack
 
@@ -401,9 +403,11 @@ pxenv:
 		; the PXEStatus variable.
 		popad
 
-		; If the TFTP failed, it could return.
+		; If the call failed, it could return.
 		cmp bx,0073h
 		jz .enable_timer
+		cmp bx,00E5h
+		jz .enable_timer
 		jmp .pop_flags
 
 .enable_timer: