From eba36c51fa066f1a8abdc41c42b9f5310d181a12 Mon Sep 17 00:00:00 2001 From: Jeff Johnston Date: Wed, 13 May 2009 18:28:49 +0000 Subject: [PATCH] 2009-05-13 Paul Brook * libc/machine/arm/setjmp.S: Add ARMv6-M implementation. --- newlib/ChangeLog | 4 +++ newlib/libc/machine/arm/setjmp.S | 51 +++++++++++++++++++++++++++++++- 2 files changed, 54 insertions(+), 1 deletion(-) diff --git a/newlib/ChangeLog b/newlib/ChangeLog index c8876719d..01f0107ab 100644 --- a/newlib/ChangeLog +++ b/newlib/ChangeLog @@ -1,3 +1,7 @@ +2009-05-13 Paul Brook + + * libc/machine/arm/setjmp.S: Add ARMv6-M implementation. + 2009-05-13 Corinna Vinschen * libc/locale/locale.c (setlocale): Don't build on Cygwin. diff --git a/newlib/libc/machine/arm/setjmp.S b/newlib/libc/machine/arm/setjmp.S index 4bb2a46a7..2181a1874 100644 --- a/newlib/libc/machine/arm/setjmp.S +++ b/newlib/libc/machine/arm/setjmp.S @@ -55,6 +55,55 @@ For Thumb-2 do everything in Thumb mode. */ +#if defined(__ARM_ARCH_6M__) +/* ARMv6-M has to be implemented in Thumb mode. */ + +.thumb +.thumb_func + .globl SYM (setjmp) + TYPE (setjmp) +SYM (setjmp): + /* Save registers in jump buffer. */ + stmia r0!, {r4, r5, r6, r7} + mov r1, r8 + mov r2, r9 + mov r3, r10 + mov r4, fp + mov r5, sp + mov r6, lr + stmia r0!, {r1, r2, r3, r4, r5, r6} + sub r0, r0, #40 + /* Restore callee-saved low regs. */ + ldmia r0!, {r4, r5, r6, r7} + /* Return zero. */ + mov r0, #0 + bx lr + +.thumb_func + .globl SYM (longjmp) + TYPE (longjmp) +SYM (longjmp): + /* Restore High regs. */ + add r0, r0, #16 + ldmia r0!, {r2, r3, r4, r5, r6} + mov r8, r2 + mov r9, r3 + mov r10, r4 + mov fp, r5 + mov sp, r6 + ldmia r0!, {r3} /* lr */ + /* Restore low regs. */ + sub r0, r0, #40 + ldmia r0!, {r4, r5, r6, r7} + /* Return the result argument, or 1 if it is zero. */ + mov r0, r1 + bne 1f + mov r0, #1 +1: + bx r3 + +#else + #ifdef __APCS_26__ #define RET movs pc, lr #elif defined(__thumb2__) @@ -169,4 +218,4 @@ SYM (\name): moveq a1, #1 FUNC_END longjmp - +#endif -- 2.43.5