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Diffstat (limited to 'ports/sysdeps/arm/__longjmp.S')
| -rw-r--r-- | ports/sysdeps/arm/__longjmp.S | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/ports/sysdeps/arm/__longjmp.S b/ports/sysdeps/arm/__longjmp.S new file mode 100644 index 0000000000..cc802c15bd --- /dev/null +++ b/ports/sysdeps/arm/__longjmp.S @@ -0,0 +1,111 @@ +/* longjmp for ARM. + Copyright (C) 1997, 1998, 2005, 2006, 2009, 2010 + Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#define _SETJMP_H +#define _ASM +#include <bits/setjmp.h> +#include <rtld-global-offsets.h> + +/* __longjmp(jmpbuf, val) */ + +ENTRY (__longjmp) + mov ip, r0 + movs r0, r1 /* get the return value in place */ + moveq r0, #1 /* can't let setjmp() return zero! */ + +#ifdef CHECK_SP + ldr r4, [ip, #32] /* jmpbuf's sp */ + cfi_undefined (r4) + CHECK_SP (r4) +#endif + LOADREGS(ia, ip!, {v1-v6, sl, fp, sp, lr}) + cfi_restore (v1) + cfi_restore (v2) + cfi_restore (v3) + cfi_restore (v4) + cfi_restore (v5) + cfi_restore (v6) + cfi_restore (sl) + cfi_restore (fp) + cfi_restore (sp) + cfi_restore (lr) + +#ifdef IS_IN_rtld + ldr a2, 1f + ldr a3, Lrtld_local_ro +0: add a2, pc, a2 + add a2, a2, a3 + ldr a2, [a2, #RTLD_GLOBAL_RO_DL_HWCAP_OFFSET] +#else +#ifdef PIC + ldr a2, 1f + ldr a3, Lrtld_global_ro +0: add a2, pc, a2 + ldr a2, [a2, a3] + ldr a2, [a2, #RTLD_GLOBAL_RO_DL_HWCAP_OFFSET] +#else + ldr a2, Lhwcap + ldr a2, [a2, #0] +#endif +#endif + + tst a2, #HWCAP_ARM_VFP + beq Lno_vfp + + /* Restore the VFP registers. */ + /* Following instruction is vldmia ip!, {d8-d15}. */ + ldc p11, cr8, [r12], #64 + /* Restore the floating-point status register. */ + ldr a3, [ip], #4 + /* Following instruction is fmxr fpscr, a3. */ + mcr p10, 7, a3, cr1, cr0, 0 +Lno_vfp: + + tst a2, #HWCAP_ARM_IWMMXT + beq Lno_iwmmxt + + /* Restore the call-preserved iWMMXt registers. */ + /* Following instructions are wldrd wr10, [ip], #8 (etc.) */ + ldcl p1, cr10, [r12], #8 + ldcl p1, cr11, [r12], #8 + ldcl p1, cr12, [r12], #8 + ldcl p1, cr13, [r12], #8 + ldcl p1, cr14, [r12], #8 + ldcl p1, cr15, [r12], #8 +Lno_iwmmxt: + + DO_RET(lr) + +#ifdef IS_IN_rtld +1: .long _GLOBAL_OFFSET_TABLE_ - 0b - 8 +Lrtld_local_ro: + .long C_SYMBOL_NAME(_rtld_local_ro)(GOTOFF) +#else +#ifdef PIC +1: .long _GLOBAL_OFFSET_TABLE_ - 0b - 8 +Lrtld_global_ro: + .long C_SYMBOL_NAME(_rtld_global_ro)(GOT) +#else +Lhwcap: + .long C_SYMBOL_NAME(_dl_hwcap) +#endif +#endif + +END (__longjmp) |