sanchayanmaity/minix
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

kernel:handle improper svc calls gracefully.

Browse source 
Change-Id: Id0f694dd2a8c5981900601fcdb2112ee266d0d76
This commit is contained in:
Kees Jongenburger 2013-02-19 13:17:54 +01:00
parent b18224051a
commit d47f512a13
1 changed files with 6 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
kernel/arch/earm/mpx.S
View file

@ -192,7 +192,11 @@ ENTRY(svc_entry)
beq kernel_call_entry beq kernel_call_entry
cmp r3, #IPCVEC cmp r3, #IPCVEC
beq ipc_entry beq ipc_entry
b invalid_svc
/* return -1 to the current process as an invalid SWI was called .*/
mov r0, #-1
str r0, [fp, #REG0]
b _C_LABEL(switch_to_user)
/* /*
* kernel call is only from a process to kernel * kernel call is only from a process to kernel
@ -244,7 +248,7 @@ ENTRY(ipc_entry)
b _C_LABEL(switch_to_user) b _C_LABEL(switch_to_user)
ENTRY(invalid_svc) ENTRY(invalid_svc)
b . b .
ENTRY(restore_user_context) ENTRY(restore_user_context)
/* sp holds the proc ptr */ /* sp holds the proc ptr */