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use for debugging the normal C callig convention!

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=> no using of compiler flags -fomit-frame-pointer
=> definition of the macro WITH_FRAME_POINTER
This commit is contained in:
Stefan Lankes 2011-03-22 22:11:43 +01:00
parent 88393984d9
commit de9fb1fc65
2 changed files with 7 additions and 0 deletions
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3
Makefile.example
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@ -24,7 +24,10 @@ NASM = nasm
MAKE = make
NASMFLAGS = -felf32 -g
INCLUDE = -I$(TOPDIR)/include -I$(TOPDIR)/arch/$(ARCH)/include -I$(TOPDIR)/lwip/src/include -I$(TOPDIR)/lwip/src/include/ipv4 -I$(TOPDIR)/drivers
# Compiler options for final code
CFLAGS = -g -m32 -march=i586 -Wall -O2 -fno-zero-initialized-in-bss -fno-builtin -fstrength-reduce -fomit-frame-pointer -finline-functions -nostdinc $(INCLUDE) -fno-stack-protector
# Compiler options for debuuging
#CFLAGS = -g -O -m32 -march=i586 -Wall -fno-zero-initialized-in-bss -fno-builtin -DWITH_FRAME_POINTER -nostdinc $(INCLUDE) -fno-stack-protector
ARFLAGS = rsv
RM = rm -rf
LDFLAGS = -T link.ld -z max-page-size=4096 --defsym __BUILD_DATE=$(shell date +'%Y%m%d') --defsym __BUILD_TIME=$(shell date +'%H%M%S')

4
arch/x86/kernel/gdt.c
View file

@ -79,6 +79,10 @@ int arch_fork(task_t* task)
asm volatile ("pop %%eax" : "=a"(task_state_segments[id].edi));
asm volatile ("pop %%eax" : "=a"(task_state_segments[id].esi));
asm volatile ("pop %%eax" : "=a"(task_state_segments[id].ebp));
#ifdef WITH_FRAME_POINTER
task_state_segments[id].ebp -= (uint32_t) kstacks[curr_task->id];
task_state_segments[id].ebp += (uint32_t) kstacks[id];
#endif
asm volatile ("add $4, %%esp" ::: "%esp");
asm volatile ("pop %%eax" : "=a"(task_state_segments[id].ebx));
asm volatile ("pop %%eax" : "=a"(task_state_segments[id].edx));