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riscv: Add types to indirectly called assembly functions

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With CONFIG_CFI_CLANG, assembly functions indirectly called
from C code must be annotated with type identifiers to pass CFI
checking. Use the SYM_TYPED_START macro to add types to the
relevant functions.

Reviewed-by: Kees Cook <keescook@chromium.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Link: https://lore.kernel.org/r/20230710183544.999540-10-samitolvanen@google.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Sami Tolvanen 2023-07-10 18:35:47 +00:00 committed by Palmer Dabbelt
parent 08d0ce30e0
commit 5f59c6855b
No known key found for this signature in database
GPG Key ID: 2E1319F35FBB1889
2 changed files with 6 additions and 4 deletions
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5
arch/riscv/kernel/mcount.S
View File

@ -3,6 +3,7 @@
#include <linux/init.h>
#include <linux/linkage.h>
#include <linux/cfi_types.h>
#include <asm/asm.h>
#include <asm/csr.h>
#include <asm/unistd.h>
@ -47,13 +48,13 @@
addi sp, sp, 4*SZREG
.endm
ENTRY(ftrace_stub)
SYM_TYPED_FUNC_START(ftrace_stub)
#ifdef CONFIG_DYNAMIC_FTRACE
.global MCOUNT_NAME
.set MCOUNT_NAME, ftrace_stub
#endif
ret
ENDPROC(ftrace_stub)
SYM_FUNC_END(ftrace_stub)
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
ENTRY(return_to_handler)

5
arch/riscv/kernel/suspend_entry.S
View File

@ -5,6 +5,7 @@
*/
#include <linux/linkage.h>
#include <linux/cfi_types.h>
#include <asm/asm.h>
#include <asm/asm-offsets.h>
#include <asm/assembler.h>
@ -58,7 +59,7 @@ ENTRY(__cpu_suspend_enter)
ret
END(__cpu_suspend_enter)
ENTRY(__cpu_resume_enter)
SYM_TYPED_FUNC_START(__cpu_resume_enter)
/* Load the global pointer */
.option push
.option norelax
@ -94,4 +95,4 @@ ENTRY(__cpu_resume_enter)
/* Return to C code */
ret
END(__cpu_resume_enter)
SYM_FUNC_END(__cpu_resume_enter)