Cheri-research/cheri-cap-lib
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Add SetCID permission bit

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This commit is contained in:
Peter Rugg
2019-03-19 17:59:54 +00:00
parent 5504d1380e
commit aaa150091f
2 changed files with 5 additions and 1 deletions
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3
CHERICC_Fat.bsv
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@@ -94,6 +94,7 @@ typedef Bit#(CapAddressW) CapAddress;
// The Hardware permissions type
typedef struct {
Bool reserved;
Bool permit_set_CID;
Bool acces_sys_regs;
Bool permit_unseal;
Bool permit_ccall;
@@ -866,6 +867,7 @@ instance CHERICap #(CapPipe, 18, 64);
function HardPerms getHardPerms (CapPipe cap);
return HardPerms {
permitSetCID: cap.capFat.perms.hard.permit_set_CID,
accessSysRegs: cap.capFat.perms.hard.acces_sys_regs,
permitUnseal: cap.capFat.perms.hard.permit_unseal,
permitCCall: cap.capFat.perms.hard.permit_ccall,
@@ -883,6 +885,7 @@ instance CHERICap #(CapPipe, 18, 64);
function CapPipe setHardPerms (CapPipe cap, HardPerms perms);
cap.capFat.perms.hard = HPerms {
reserved: ?,
permit_set_CID: perms.permitSetCID,
acces_sys_regs: perms.accessSysRegs,
permit_unseal: perms.accessSysRegs,
permit_ccall: perms.accessSysRegs,

3
CHERICap.bsv
View File

@@ -35,6 +35,7 @@ package CHERICap;
typedef Bit#(16) SoftPerms;
typedef struct {
Bool permitSetCID;
Bool accessSysRegs;
Bool permitUnseal;
Bool permitCCall;
@@ -95,7 +96,7 @@ typeclass CHERICap#(type t, numeric type ot, numeric type n)
function t setSoftPerms (t cap, SoftPerms softperms);
// Get the architectural permissions
function Bit#(31) getPerms (t cap) =
zeroExtend({pack(getSoftPerms(cap)), 4'h0, pack(getHardPerms(cap))});
zeroExtend({pack(getSoftPerms(cap)), 3'h0, pack(getHardPerms(cap))});
// Set the architectural permissions
function t setPerms (t cap, Bit#(31) perms) =
setSoftPerms(setHardPerms(cap, unpack(perms[11:0])), unpack(truncate(perms[30:15])));