I'm using gnu sparc tool chain. I have sparc-ab-elf-gcc and sparc-ab-linux-gcc. ('ab' is the processor name). I want to compile a program which uses malloc and free (this program is supposed to be run on linux) on baremetal(without os). So I should compile it using sparc-ab-elf-gcc. I heard I can use dlmalloc for this case. (see stdlib-like library on bare metal environment? (memory management and hopefully pthread support) ) but I'm seeing some compile error for simple test program which just does malloc and free once each time.
// test malloc, realloc and free
#include <aldebaran.h>
#include <malloc.h>
int main()
{
int i;
ab_printf("%s\n",CKIM_XX);
char *buff = dlmalloc(100);
for(i = 0; i < 100; i++) {
buff[i] = (char) i;
}
ab_printf("buff = %x\n'");
for(i=0; i<100; i++) {
ab_printf("%d ", buff[i]);
}
ab_printf("\n");
dlfree(buff);
return 0;
}
ckim@stph45:~/prj2/abts/yolo-bare/darknet] make test3
sparc-ab-elf-gcc -c -I./src -I../include -I/opt/abde/sparc-ab-elf/include -DALDEBARAN_FPGA -DABC_CT -O3 -ffast-math -fcommon -msoft-float -mcpu=v8 -Wa,-xarch=v8plusb -Wall -Wfatal-errors ./src/malloc.c -o obj/malloc.o
./src/malloc.c:571:40: fatal error: sys/mman.h: No such file or directory
compilation terminated.
make: *** [obj/malloc.o] Error 1
My bare-metal system doesn't have sys/mman.h (I searched it on the elf toolchain library) so tried again after defining LACKS_SYS_MMAN_H and got
ckim@stph45:~/prj2/abts/yolo-bare/darknet] make test3
sparc-ab-elf-gcc -c -I./src -I../include -I/opt/abde/sparc-ab-elf/include -DALDEBARAN_FPGA -DABC_CT -O3 -ffast-math -fcommon -msoft-float -mcpu=v8 -Wa,-xarch=v8plusb -Wall -Wfatal-errors -DLACKS_SYS_MMAN_H ./src/test3.c -o obj/test3.o
sparc-ab-elf-gcc -c -I./src -I../include -I/opt/abde/sparc-ab-elf/include -DALDEBARAN_FPGA -DABC_CT -O3 -ffast-math -fcommon -msoft-float -mcpu=v8 -Wa,-xarch=v8plusb -Wall -Wfatal-errors -DLACKS_SYS_MMAN_H ./src/malloc.c -o obj/malloc.o
./src/malloc.c: In function 'mmap_alloc':
./src/malloc.c:2924:5: warning: implicit declaration of function 'mmap' [-Wimplicit-function-declaration]
./src/malloc.c:2924:24: error: 'PROT_READ' undeclared (first use in this function)
compilation terminated due to -Wfatal-errors.
make: *** [obj/malloc.o] Error 1
The dlmalloc.c is a very long program. (I divided it into malloc.h and malloc.c) Below is the function making error..
/* Malloc using mmap */
static void* mmap_alloc(mstate m, size_t nb) {
size_t mmsize = mmap_align(nb + SIX_SIZE_T_SIZES + CHUNK_ALIGN_MASK);
if (m->footprint_limit != 0) {
size_t fp = m->footprint + mmsize;
if (fp <= m->footprint || fp > m->footprint_limit)
return 0;
}
if (mmsize > nb) { /* Check for wrap around 0 */
char* mm = (char*)(CALL_DIRECT_MMAP(mmsize)); <=== line causing error.
if (mm != CMFAIL) {
size_t offset = align_offset(chunk2mem(mm));
size_t psize = mmsize - offset - MMAP_FOOT_PAD;
mchunkptr p = (mchunkptr)(mm + offset);
p->prev_foot = offset;
p->head = psize;
mark_inuse_foot(m, p, psize);
chunk_plus_offset(p, psize)->head = FENCEPOST_HEAD;
chunk_plus_offset(p, psize+SIZE_T_SIZE)->head = 0;
if (m->least_addr == 0 || mm < m->least_addr)
m->least_addr = mm;
if ((m->footprint += mmsize) > m->max_footprint)
m->max_footprint = m->footprint;
assert(is_aligned(chunk2mem(p)));
check_mmapped_chunk(m, p);
return chunk2mem(p);
}
}
return 0;
}
can somebody give me a light?
