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Split the common arm64 fu* and su* asm to a macro

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As these are mostly identical split out the common code to a macro.

Sponsored by:	Innovate UK
This commit is contained in:
Andrew Turner 2020-10-19 12:46:03 +00:00
parent 474c444e04
commit 956cc8e1b9
1 changed files with 15 additions and 32 deletions
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47
sys/arm64/arm64/support.S
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@ -95,15 +95,19 @@ ENTRY(casueword)
ret /* Return */
END(casueword)
.macro fsudata insn, ret_reg, user_arg
adr x7, fsu_fault /* Load the fault handler */
SET_FAULT_HANDLER(x7, x6) /* And set it */
\insn \ret_reg, [x\user_arg] /* Try accessing the data */
SET_FAULT_HANDLER(xzr, x6) /* Reset the fault handler */
.endm
/*
* int fubyte(volatile const void *)
*/
ENTRY(fubyte)
check_user_access 0, (VM_MAXUSER_ADDRESS), fsu_fault_nopcb
adr x6, fsu_fault /* Load the fault handler */
SET_FAULT_HANDLER(x6, x1) /* And set it */
ldtrb w0, [x0] /* Try loading the data */
SET_FAULT_HANDLER(xzr, x1) /* Reset the fault handler */
fsudata ldtrb, w0, 0
ret /* Return */
END(fubyte)
@ -112,10 +116,7 @@ END(fubyte)
*/
ENTRY(fuword16)
check_user_access 0, (VM_MAXUSER_ADDRESS-1), fsu_fault_nopcb
adr x6, fsu_fault /* Load the fault handler */
SET_FAULT_HANDLER(x6, x1) /* And set it */
ldtrh w0, [x0] /* Try loading the data */
SET_FAULT_HANDLER(xzr, x1) /* Reset the fault handler */
fsudata ldtrh, w0, 0
ret /* Return */
END(fuword16)
@ -124,10 +125,7 @@ END(fuword16)
*/
ENTRY(fueword32)
check_user_access 0, (VM_MAXUSER_ADDRESS-3), fsu_fault_nopcb
adr x6, fsu_fault /* Load the fault handler */
SET_FAULT_HANDLER(x6, x2) /* And set it */
ldtr w0, [x0] /* Try loading the data */
SET_FAULT_HANDLER(xzr, x2) /* Reset the fault handler */
fsudata ldtr, w0, 0
str w0, [x1] /* Save the data in kernel space */
mov w0, #0 /* Success */
ret /* Return */
@ -140,10 +138,7 @@ END(fueword32)
ENTRY(fueword)
EENTRY(fueword64)
check_user_access 0, (VM_MAXUSER_ADDRESS-7), fsu_fault_nopcb
adr x6, fsu_fault /* Load the fault handler */
SET_FAULT_HANDLER(x6, x2) /* And set it */
ldtr x0, [x0] /* Try loading the data */
SET_FAULT_HANDLER(xzr, x2) /* Reset the fault handler */
fsudata ldtr, x0, 0
str x0, [x1] /* Save the data in kernel space */
mov x0, #0 /* Success */
ret /* Return */
@ -155,10 +150,7 @@ END(fueword)
*/
ENTRY(subyte)
check_user_access 0, (VM_MAXUSER_ADDRESS), fsu_fault_nopcb
adr x6, fsu_fault /* Load the fault handler */
SET_FAULT_HANDLER(x6, x2) /* And set it */
sttrb w1, [x0] /* Try storing the data */
SET_FAULT_HANDLER(xzr, x2) /* Reset the fault handler */
fsudata sttrb, w1, 0
mov x0, #0 /* Success */
ret /* Return */
END(subyte)
@ -168,10 +160,7 @@ END(subyte)
*/
ENTRY(suword16)
check_user_access 0, (VM_MAXUSER_ADDRESS-1), fsu_fault_nopcb
adr x6, fsu_fault /* Load the fault handler */
SET_FAULT_HANDLER(x6, x2) /* And set it */
sttrh w1, [x0] /* Try storing the data */
SET_FAULT_HANDLER(xzr, x2) /* Reset the fault handler */
fsudata sttrh, w1, 0
mov x0, #0 /* Success */
ret /* Return */
END(suword16)
@ -181,10 +170,7 @@ END(suword16)
*/
ENTRY(suword32)
check_user_access 0, (VM_MAXUSER_ADDRESS-3), fsu_fault_nopcb
adr x6, fsu_fault /* Load the fault handler */
SET_FAULT_HANDLER(x6, x2) /* And set it */
sttr w1, [x0] /* Try storing the data */
SET_FAULT_HANDLER(xzr, x2) /* Reset the fault handler */
fsudata sttr, w1, 0
mov x0, #0 /* Success */
ret /* Return */
END(suword32)
@ -195,10 +181,7 @@ END(suword32)
ENTRY(suword)
EENTRY(suword64)
check_user_access 0, (VM_MAXUSER_ADDRESS-7), fsu_fault_nopcb
adr x6, fsu_fault /* Load the fault handler */
SET_FAULT_HANDLER(x6, x2) /* And set it */
sttr x1, [x0] /* Try storing the data */
SET_FAULT_HANDLER(xzr, x2) /* Reset the fault handler */
fsudata sttr, x1, 0
mov x0, #0 /* Success */
ret /* Return */
EEND(suword64)