diff options
| -rw-r--r-- | libitm/config/aarch64/sjlj.S | 56 |
1 files changed, 53 insertions, 3 deletions
diff --git a/libitm/config/aarch64/sjlj.S b/libitm/config/aarch64/sjlj.S index e2093ca..c84e98a 100644 --- a/libitm/config/aarch64/sjlj.S +++ b/libitm/config/aarch64/sjlj.S @@ -25,6 +25,35 @@ #include "asmcfi.h" #define BTI_C hint 34 +#define PACIASP hint 25 +#define AUTIASP hint 29 +#define PACIBSP hint 27 +#define AUTIBSP hint 31 + +#if defined(HAVE_AS_CFI_PSEUDO_OP) && defined(__GCC_HAVE_DWARF2_CFI_ASM) +# define cfi_window_save .cfi_window_save +# define cfi_b_key_frame .cfi_b_key_frame +#else +# define cfi_window_save +# define cfi_b_key_frame +#endif + +#if __ARM_FEATURE_PAC_DEFAULT & 1 +# define CFI_PAC_TOGGLE cfi_window_save +# define CFI_PAC_KEY +# define PAC_AND_BTI PACIASP +# define AUT AUTIASP +#elif __ARM_FEATURE_PAC_DEFAULT & 2 +# define CFI_PAC_TOGGLE cfi_window_save +# define CFI_PAC_KEY cfi_b_key_frame +# define PAC_AND_BTI PACIBSP +# define AUT AUTIBSP +#else +# define CFI_PAC_TOGGLE +# define CFI_PAC_KEY +# define PAC_AND_BTI BTI_C +# define AUT +#endif .text .align 2 @@ -33,7 +62,9 @@ _ITM_beginTransaction: cfi_startproc - BTI_C + CFI_PAC_KEY + PAC_AND_BTI + CFI_PAC_TOGGLE mov x1, sp stp x29, x30, [sp, -11*16]! cfi_adjust_cfa_offset(11*16) @@ -60,6 +91,8 @@ _ITM_beginTransaction: cfi_adjust_cfa_offset(-11*16) cfi_restore(x29) cfi_restore(x30) + AUT + CFI_PAC_TOGGLE ret cfi_endproc .size _ITM_beginTransaction, . - _ITM_beginTransaction @@ -73,6 +106,7 @@ GTM_longjmp: /* The first parameter becomes the return value (x0). The third parameter is ignored for now. */ cfi_startproc + CFI_PAC_KEY BTI_C ldp x19, x20, [x1, 1*16] ldp x21, x22, [x1, 2*16] @@ -86,7 +120,10 @@ GTM_longjmp: ldr x3, [x1, 10*16] ldp x29, x30, [x1] cfi_def_cfa(x1, 0) + CFI_PAC_TOGGLE mov sp, x3 + AUT + CFI_PAC_TOGGLE br x30 cfi_endproc .size GTM_longjmp, . - GTM_longjmp @@ -96,6 +133,19 @@ GTM_longjmp: #define FEATURE_1_BTI 1 #define FEATURE_1_PAC 2 +/* Supported features based on the code generation options. */ +#if defined(__ARM_FEATURE_BTI_DEFAULT) +# define BTI_FLAG FEATURE_1_BTI +#else +# define BTI_FLAG 0 +#endif + +#if __ARM_FEATURE_PAC_DEFAULT & 3 +# define PAC_FLAG FEATURE_1_PAC +#else +# define PAC_FLAG 0 +#endif + /* Add a NT_GNU_PROPERTY_TYPE_0 note. */ #define GNU_PROPERTY(type, value) \ .section .note.gnu.property, "a"; \ @@ -113,7 +163,7 @@ GTM_longjmp: .section .note.GNU-stack, "", %progbits /* Add GNU property note if built with branch protection. */ -# ifdef __ARM_FEATURE_BTI_DEFAULT -GNU_PROPERTY (FEATURE_1_AND, FEATURE_1_BTI) +# if (BTI_FLAG|PAC_FLAG) != 0 +GNU_PROPERTY (FEATURE_1_AND, BTI_FLAG|PAC_FLAG) # endif #endif |