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runtime: do not use buggy llvm.eh.sjlj.* intrinsics

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This commit is contained in:
Sebastien Bourdeauducq 2014-09-23 22:09:08 +08:00
parent 8b769a0417
commit af15f45bb9
7 changed files with 56 additions and 7 deletions
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9
artiq/devices/runtime.py
View File

@ -62,6 +62,10 @@ class LinkInterface:
self.llvm_module.add_function(func_type, "__syscall_"+func_name)
# exception handling
func_type = lc.Type.function(lc.Type.int(), [lc.Type.pointer(lc.Type.int(8))])
function = self.llvm_module.add_function(func_type, "__eh_setjmp")
function.add_attribute(lc.ATTR_NO_UNWIND)
func_type = lc.Type.function(lc.Type.pointer(lc.Type.int(8)), [])
self.llvm_module.add_function(func_type, "__eh_push")
@ -90,11 +94,10 @@ class LinkInterface:
return r
def build_catch(self, builder):
eh_setjmp = self.llvm_module.get_function_named("__eh_setjmp")
eh_push = self.llvm_module.get_function_named("__eh_push")
setjmp = lc.Function.intrinsic(self.llvm_module,
lc.INTR_EH_SJLJ_SETJMP, [])
jmpbuf = builder.call(eh_push, [])
exception_occured = builder.call(setjmp, [jmpbuf])
exception_occured = builder.call(eh_setjmp, [jmpbuf])
return builder.icmp(lc.ICMP_NE,
exception_occured,
lc.Constant.int(lc.Type.int(), 0))

2
soc/runtime/Makefile
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@ -3,7 +3,7 @@ include $(MSCDIR)/software/common.mak
BOARD=papilio_pro
SERIAL=/dev/ttyUSB1
OBJECTS=isr.o elf_loader.o exceptions.o services.o corecom_serial.o gpio.o rtio.o dds.o main.o
OBJECTS=isr.o elf_loader.o exception_jmp.o exceptions.o services.o corecom_serial.o gpio.o rtio.o dds.o main.o
all: runtime.bin

41
soc/runtime/exception_jmp.S Normal file
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@ -0,0 +1,41 @@
.global exception_setjmp
.type exception_setjmp,@function
exception_setjmp:
l.sw 0(r3), r1
l.sw 4(r3), r2
l.sw 8(r3), r9
l.sw 12(r3), r10
l.sw 16(r3), r14
l.sw 20(r3), r16
l.sw 24(r3), r18
l.sw 28(r3), r20
l.sw 32(r3), r22
l.sw 36(r3), r24
l.sw 40(r3), r26
l.sw 44(r3), r28
l.sw 48(r3), r30
l.jr r9
l.ori r11,r0,0
.global exception_longjmp
.type exception_longjmp,@function
exception_longjmp:
l.sfeqi r4, 0
l.bnf 1f
l.addi r11, r4, 0
l.ori r11, r0, 1
1: l.lwz r1, 0(r3)
l.lwz r2, 4(r3)
l.lwz r9, 8(r3)
l.lwz r10, 12(r3)
l.lwz r14, 16(r3)
l.lwz r16, 20(r3)
l.lwz r18, 24(r3)
l.lwz r20, 28(r3)
l.lwz r22, 32(r3)
l.lwz r24, 36(r3)
l.lwz r26, 40(r3)
l.lwz r28, 44(r3)
l.lwz r30, 48(r3)
l.jr r9
l.nop

5
soc/runtime/exceptions.c
View File

@ -1,9 +1,10 @@
#include "exceptions.h"
#include "corecom.h"
#define MAX_EXCEPTION_CONTEXTS 64
struct exception_context {
void *jb[5];
void *jb[13];
};
static struct exception_context exception_contexts[MAX_EXCEPTION_CONTEXTS];
@ -29,5 +30,5 @@ int exception_getid(void)
void exception_raise(int id)
{
__builtin_longjmp(exception_contexts[--ec_top].jb, 1);
exception_longjmp(exception_contexts[--ec_top].jb, 1);
}

3
soc/runtime/exceptions.h
View File

@ -5,6 +5,9 @@ enum {
EID_NOMEM = 0
};
int exception_setjmp(void *jb) __attribute__((returns_twice));
void exception_longjmp(void *jb, int val) __attribute__((noreturn));
void *exception_push(void);
void exception_pop(int levels);
int exception_getid(void);

2
soc/runtime/main.c
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@ -77,7 +77,7 @@ static int run_kernel(const char *kernel_name, int *eid)
}
jb = exception_push();
if(__builtin_setjmp(jb)) {
if(exception_setjmp(jb)) {
*eid = exception_getid();
return KERNEL_RUN_EXCEPTION;
} else {

1
soc/runtime/services.c
View File

@ -21,6 +21,7 @@ static const struct symbol syscalls[] = {
};
static const struct symbol eh[] = {
{"setjmp", exception_setjmp},
{"push", exception_push},
{"pop", exception_pop},
{"getid", exception_getid},