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ARM: rename S_FRAME_SIZE to PT_REGS_SIZE

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S_FRAME_SIZE is no longer the size of the kernel stack frame, so this
name is misleading.  It is the size of the kernel pt_regs structure.
Name it so.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Russell King 2016-05-10 16:34:27 +01:00
parent 1a695a905c
commit 5745eef6b8
6 changed files with 15 additions and 15 deletions
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4
arch/arm/include/asm/assembler.h
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@ -480,13 +480,13 @@ THUMB( orr \reg , \reg , #PSR_T_BIT )
.macro uaccess_save, tmp
#ifdef CONFIG_CPU_SW_DOMAIN_PAN
mrc p15, 0, \tmp, c3, c0, 0
str \tmp, [sp, #S_FRAME_SIZE]
str \tmp, [sp, #PT_REGS_SIZE]
#endif
.endm
.macro uaccess_restore
#ifdef CONFIG_CPU_SW_DOMAIN_PAN
ldr r0, [sp, #S_FRAME_SIZE]
ldr r0, [sp, #PT_REGS_SIZE]
mcr p15, 0, r0, c3, c0, 0
#endif
.endm

2
arch/arm/kernel/asm-offsets.c
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@ -107,7 +107,7 @@ int main(void)
DEFINE(S_PC, offsetof(struct pt_regs, ARM_pc));
DEFINE(S_PSR, offsetof(struct pt_regs, ARM_cpsr));
DEFINE(S_OLD_R0, offsetof(struct pt_regs, ARM_ORIG_r0));
DEFINE(S_FRAME_SIZE, sizeof(struct pt_regs));
DEFINE(PT_REGS_SIZE, sizeof(struct pt_regs));
BLANK();
#ifdef CONFIG_CACHE_L2X0
DEFINE(L2X0_R_PHY_BASE, offsetof(struct l2x0_regs, phy_base));

12
arch/arm/kernel/entry-armv.S
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@ -92,7 +92,7 @@
* Invalid mode handlers
*/
.macro inv_entry, reason
sub sp, sp, #S_FRAME_SIZE
sub sp, sp, #PT_REGS_SIZE
ARM( stmib sp, {r1 - lr} )
THUMB( stmia sp, {r0 - r12} )
THUMB( str sp, [sp, #S_SP] )
@ -152,7 +152,7 @@ ENDPROC(__und_invalid)
.macro svc_entry, stack_hole=0, trace=1, uaccess=1
UNWIND(.fnstart )
UNWIND(.save {r0 - pc} )
sub sp, sp, #(S_FRAME_SIZE + 8 + \stack_hole - 4)
sub sp, sp, #(PT_REGS_SIZE + 8 + \stack_hole - 4)
#ifdef CONFIG_THUMB2_KERNEL
SPFIX( str r0, [sp] ) @ temporarily saved
SPFIX( mov r0, sp )
@ -167,7 +167,7 @@ ENDPROC(__und_invalid)
ldmia r0, {r3 - r5}
add r7, sp, #S_SP - 4 @ here for interlock avoidance
mov r6, #-1 @ "" "" "" ""
add r2, sp, #(S_FRAME_SIZE + 8 + \stack_hole - 4)
add r2, sp, #(PT_REGS_SIZE + 8 + \stack_hole - 4)
SPFIX( addeq r2, r2, #4 )
str r3, [sp, #-4]! @ save the "real" r0 copied
@ from the exception stack
@ -366,17 +366,17 @@ ENDPROC(__fiq_abt)
/*
* User mode handlers
*
* EABI note: sp_svc is always 64-bit aligned here, so should S_FRAME_SIZE
* EABI note: sp_svc is always 64-bit aligned here, so should PT_REGS_SIZE
*/
#if defined(CONFIG_AEABI) && (__LINUX_ARM_ARCH__ >= 5) && (S_FRAME_SIZE & 7)
#if defined(CONFIG_AEABI) && (__LINUX_ARM_ARCH__ >= 5) && (PT_REGS_SIZE & 7)
#error "sizeof(struct pt_regs) must be a multiple of 8"
#endif
.macro usr_entry, trace=1, uaccess=1
UNWIND(.fnstart )
UNWIND(.cantunwind ) @ don't unwind the user space
sub sp, sp, #S_FRAME_SIZE
sub sp, sp, #PT_REGS_SIZE
ARM( stmib sp, {r1 - r12} )
THUMB( stmia sp, {r0 - r12} )

2
arch/arm/kernel/entry-common.S
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@ -145,7 +145,7 @@ ENTRY(vector_swi)
#ifdef CONFIG_CPU_V7M
v7m_exception_entry
#else
sub sp, sp, #S_FRAME_SIZE
sub sp, sp, #PT_REGS_SIZE
stmia sp, {r0 - r12} @ Calling r0 - r12
ARM( add r8, sp, #S_PC )
ARM( stmdb r8, {sp, lr}^ ) @ Calling sp, lr

8
arch/arm/kernel/entry-header.S
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@ -90,7 +90,7 @@
@ Linux expects to have irqs off. Do it here before taking stack space
cpsid i
sub sp, #S_FRAME_SIZE-S_IP
sub sp, #PT_REGS_SIZE-S_IP
stmdb sp!, {r0-r11}
@ load saved r12, lr, return address and xPSR.
@ -160,7 +160,7 @@
ldmia sp!, {r0-r11}
@ restore main sp
add sp, sp, #S_FRAME_SIZE-S_IP
add sp, sp, #PT_REGS_SIZE-S_IP
cpsie i
bx lr
@ -307,7 +307,7 @@
.endif
mov r0, r0 @ ARMv5T and earlier require a nop
@ after ldm {}^
add sp, sp, #\offset + S_FRAME_SIZE
add sp, sp, #\offset + PT_REGS_SIZE
movs pc, lr @ return & move spsr_svc into cpsr
#elif defined(CONFIG_CPU_V7M)
@ V7M restore.
@ -334,7 +334,7 @@
.else
ldmdb sp, {r0 - r12} @ get calling r0 - r12
.endif
add sp, sp, #S_FRAME_SIZE - S_SP
add sp, sp, #PT_REGS_SIZE - S_SP
movs pc, lr @ return & move spsr_svc into cpsr
#endif /* !CONFIG_THUMB2_KERNEL */
.endm

2
arch/arm/kernel/entry-v7m.S
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@ -73,7 +73,7 @@ __irq_entry:
@ correctness they don't need to be restored. So only r8-r11 must be
@ restored here. The easiest way to do so is to restore r0-r7, too.
ldmia sp!, {r0-r11}
add sp, #S_FRAME_SIZE-S_IP
add sp, #PT_REGS_SIZE-S_IP
cpsie i
bx lr
ENDPROC(__irq_entry)