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riscv: Rename "sp_in_global" to "current_stack_pointer" 

To follow the existing per-arch conventions, rename "sp_in_global" to
"current_stack_pointer". This will let it be used in non-arch places
(like HARDENED_USERCOPY).

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Kees Cook 2022-02-23 22:04:11 -08:00 committed by Palmer Dabbelt
parent 60210a3d86
commit fdecfea093
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GPG Key ID: 2E1319F35FBB1889
3 changed files with 5 additions and 4 deletions
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1
arch/riscv/Kconfig
View File

@ -16,6 +16,7 @@ config RISCV
select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2
select ARCH_HAS_BINFMT_FLAT
select ARCH_HAS_CURRENT_STACK_POINTER
select ARCH_HAS_DEBUG_VM_PGTABLE
select ARCH_HAS_DEBUG_VIRTUAL if MMU
select ARCH_HAS_DEBUG_WX

2
arch/riscv/include/asm/current.h
View File

@ -33,6 +33,8 @@ static __always_inline struct task_struct *get_current(void)
#define current get_current()
register unsigned long current_stack_pointer __asm__("sp");
#endif /* __ASSEMBLY__ */
#endif /* _ASM_RISCV_CURRENT_H */

6
arch/riscv/kernel/stacktrace.c
View File

@ -14,8 +14,6 @@
#include <asm/stacktrace.h>
register unsigned long sp_in_global __asm__("sp");
#ifdef CONFIG_FRAME_POINTER
void notrace walk_stackframe(struct task_struct *task, struct pt_regs *regs,
@ -30,7 +28,7 @@ void notrace walk_stackframe(struct task_struct *task, struct pt_regs *regs,
pc = instruction_pointer(regs);
} else if (task == NULL || task == current) {
fp = (unsigned long)__builtin_frame_address(0);
sp = sp_in_global;
sp = current_stack_pointer;
pc = (unsigned long)walk_stackframe;
} else {
/* task blocked in __switch_to */
@ -78,7 +76,7 @@ void notrace walk_stackframe(struct task_struct *task,
sp = user_stack_pointer(regs);
pc = instruction_pointer(regs);
} else if (task == NULL || task == current) {
sp = sp_in_global;
sp = current_stack_pointer;
pc = (unsigned long)walk_stackframe;
} else {
/* task blocked in __switch_to */