diff options
| author | Russell King <rmk+kernel@armlinux.org.uk> | 2016-05-13 12:22:38 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2016-06-22 21:54:52 +0300 |
| commit | e6a9dc6129d23cd3025e841c4e13a70910a37135 (patch) | |
| tree | c640167a388bc12c4e82f6416becd61546c126c3 | |
| parent | 5745eef6b813194b4dd3e2aee1dd712d8512bf91 (diff) | |
| download | linux-e6a9dc6129d23cd3025e841c4e13a70910a37135.tar.xz | |
ARM: introduce svc_pt_regs structure
Since the privileged mode pt_regs are an extended version of the saved
userland pt_regs, introduce a new svc_pt_regs structure to describe this
layout.
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
| -rw-r--r-- | arch/arm/include/asm/assembler.h | 4 | ||||
| -rw-r--r-- | arch/arm/include/asm/ptrace.h | 8 | ||||
| -rw-r--r-- | arch/arm/kernel/asm-offsets.c | 2 | ||||
| -rw-r--r-- | arch/arm/kernel/entry-armv.S | 4 |
4 files changed, 14 insertions, 4 deletions
diff --git a/arch/arm/include/asm/assembler.h b/arch/arm/include/asm/assembler.h index 60d9c5471eb6..4eaea2173bf8 100644 --- a/arch/arm/include/asm/assembler.h +++ b/arch/arm/include/asm/assembler.h @@ -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, #PT_REGS_SIZE] + str \tmp, [sp, #SVC_DACR] #endif .endm .macro uaccess_restore #ifdef CONFIG_CPU_SW_DOMAIN_PAN - ldr r0, [sp, #PT_REGS_SIZE] + ldr r0, [sp, #SVC_DACR] mcr p15, 0, r0, c3, c0, 0 #endif .endm diff --git a/arch/arm/include/asm/ptrace.h b/arch/arm/include/asm/ptrace.h index 51622ba7c4a6..5194cf79c90f 100644 --- a/arch/arm/include/asm/ptrace.h +++ b/arch/arm/include/asm/ptrace.h @@ -13,10 +13,18 @@ #include <uapi/asm/ptrace.h> #ifndef __ASSEMBLY__ +#include <linux/types.h> + struct pt_regs { unsigned long uregs[18]; }; +struct svc_pt_regs { + struct pt_regs regs; + u32 dacr; + u32 unused; +}; + #define user_mode(regs) \ (((regs)->ARM_cpsr & 0xf) == 0) diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c index 2841c9980bcd..9a8ce342cd82 100644 --- a/arch/arm/kernel/asm-offsets.c +++ b/arch/arm/kernel/asm-offsets.c @@ -108,6 +108,8 @@ int main(void) DEFINE(S_PSR, offsetof(struct pt_regs, ARM_cpsr)); DEFINE(S_OLD_R0, offsetof(struct pt_regs, ARM_ORIG_r0)); DEFINE(PT_REGS_SIZE, sizeof(struct pt_regs)); + DEFINE(SVC_DACR, offsetof(struct svc_pt_regs, dacr)); + DEFINE(SVC_REGS_SIZE, sizeof(struct svc_pt_regs)); BLANK(); #ifdef CONFIG_CACHE_L2X0 DEFINE(L2X0_R_PHY_BASE, offsetof(struct l2x0_regs, phy_base)); diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index a6cb019d9920..0d6f5413be18 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -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, #(PT_REGS_SIZE + 8 + \stack_hole - 4) + sub sp, sp, #(SVC_REGS_SIZE + \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, #(PT_REGS_SIZE + 8 + \stack_hole - 4) + add r2, sp, #(SVC_REGS_SIZE + \stack_hole - 4) SPFIX( addeq r2, r2, #4 ) str r3, [sp, #-4]! @ save the "real" r0 copied @ from the exception stack |