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Merge pull request #1627 from LudwigOrtmann/native-arm

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native: add support for ARM (Linux)
This commit is contained in:
Ludwig Ortmann 2014-09-04 08:13:47 -07:00
commit 63362756ff
3 changed files with 60 additions and 3 deletions
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7
boards/native/Makefile.include
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@ -25,7 +25,10 @@ export CGANNOTATE ?= cg_annotate
export GPROF ?= gprof
# basic cflags:
export CFLAGS += -Wall -Wextra -pedantic -m32
export CFLAGS += -Wall -Wextra -pedantic
ifeq ($(shell uname -m),x86_64)
export CFLAGS += -m32
endif
ifneq (,$(filter -DDEVELHELP,$(CFLAGS)))
export CFLAGS += -fstack-protector-all
endif
@ -39,7 +42,9 @@ endif
export CXXUWFLAGS +=
export CXXEXFLAGS +=
ifeq ($(shell uname -m),x86_64)
export LINKFLAGS += -m32
endif
ifeq ($(shell uname -s),FreeBSD)
ifeq ($(shell uname -m),amd64)
export LINKFLAGS += -DCOMPAT_32BIT -L/usr/lib32 -B/usr/lib32

12
cpu/native/irq_cpu.c
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@ -30,7 +30,7 @@
#define VALGRIND_DEBUG(...)
#endif
// __USE_GNU for gregs[REG_EIP] access under Linux
/* __USE_GNU for gregs[REG_EIP] access under Linux */
#define __USE_GNU
#include <signal.h>
#undef __USE_GNU
@ -331,17 +331,27 @@ void native_isr_entry(int sig, siginfo_t *info, void *context)
/* disable interrupts in context */
isr_set_sigmask((ucontext_t *)context);
_native_in_isr = 1;
/*
* For register access on new platforms see:
* http://google-glog.googlecode.com/svn/trunk/m4/pc_from_ucontext.m4
* (URL added on Fri Aug 29 17:17:45 CEST 2014)
*/
#ifdef __MACH__
_native_saved_eip = ((ucontext_t *)context)->uc_mcontext->__ss.__eip;
((ucontext_t *)context)->uc_mcontext->__ss.__eip = (unsigned int)&_native_sig_leave_tramp;
#elif defined(__FreeBSD__)
_native_saved_eip = ((struct sigcontext *)context)->sc_eip;
((struct sigcontext *)context)->sc_eip = (unsigned int)&_native_sig_leave_tramp;
#else
#ifdef __arm__
_native_saved_eip = ((ucontext_t *)context)->uc_mcontext.arm_pc;
((ucontext_t *)context)->uc_mcontext.arm_pc = (unsigned int)&_native_sig_leave_tramp;
#else
//printf("\n\033[31mEIP:\t%p\ngo switching\n\n\033[0m", (void*)((ucontext_t *)context)->uc_mcontext.gregs[REG_EIP]);
_native_saved_eip = ((ucontext_t *)context)->uc_mcontext.gregs[REG_EIP];
((ucontext_t *)context)->uc_mcontext.gregs[REG_EIP] = (unsigned int)&_native_sig_leave_tramp;
#endif
#endif
}
/**

44
cpu/native/tramp.S
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@ -1,5 +1,6 @@
/*
* Copyright (C) 2014 Ludwig Ortmann <ludwig.ortmann@fu-berlin.de>
* Copyright (C) 2013, 2014 Ludwig Ortmann <ludwig.ortmann@fu-berlin.de>
* Copyright (C) 2014 Thomas Eichinger <thomas.eichinger1@gmail.com>
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
@ -27,6 +28,47 @@ __native_sig_leave_tramp:
popfl
ret
#elif __arm__
.extern _native_saved_eip
.extern _native_isr_ctx
.extern _native_cur_ctx
.extern _native_in_isr
.globl _native_sig_leave_tramp
_native_sig_leave_tramp:
/* save _native_saved_eip and registers */
stmdb sp!, {r0}
ldr r0, =_native_saved_eip
ldr r0, [r0]
stmdb sp!, {r0-r12}
stmdb sp!, {lr}
/* exchange r0 and _native_saved_eip */
ldr r0, [sp,#56]
ldr r1, [sp,#4 ]
str r0, [sp,#4 ]
str r1, [sp,#56]
/* call swapcontext ( _native_cur_ctx, _native_isr_ctx ) */
ldr r2, =_native_cur_ctx
ldr r0, [r2]
ldr r2, =_native_isr_ctx
ldr r1, [r2]
bl swapcontext
/* reeanble interrupts */
bl eINT
/* _native_in_isr = 0 */
eor r0, r0, r0
ldr r2, =_native_in_isr
str r0, [r2]
/* restore registers, jump to (saved) _native_saved_eip */
ldmia sp!, {lr}
ldmia sp!, {r0-r12}
ldmia sp!, {pc}
#else
.extern $_native_saved_eip
.extern $_native_isr_ctx