$ cat test.cc
extern  char* malloc(int);

char* foo() {
 char* x = (char*) malloc(1024);
 return x + 10;
}

-----------------------------------------
-----------------------------------------
$ g++  -c -fPIC -O2 -o test.o test.cc
$ objdump -d test.o

test.o:     file format elf64-x86-64


Disassembly of section .text:

0000000000000000 <_Z3foov>:
   0:	48 83 ec 08          	sub    $0x8,%rsp
   4:	bf 00 04 00 00       	mov    $0x400,%edi
   9:	e8 00 00 00 00       	callq  e <_Z3foov+0xe>
   e:	48 83 c4 08          	add    $0x8,%rsp
  12:	48 83 c0 0a          	add    $0xa,%rax
  16:	c3                   	retq

-----------------------------------------
-----------------------------------------
$ g++  -c -fPIC -O2 -o test.o test.cc  -fno-omit-frame-pointer

$ objdump -d test.o

test.o:     file format elf64-x86-64


Disassembly of section .text:

0000000000000000 <_Z3foov>:
   0:	55                   	push   %rbp
   1:	bf 00 04 00 00       	mov    $0x400,%edi
   6:	48 89 e5             	mov    %rsp,%rbp
   9:	e8 00 00 00 00       	callq  e <_Z3foov+0xe>
   e:	5d                   	pop    %rbp
   f:	48


---------------------------------------
-----------------------------------------

$ aarch64-linux-android-g++ -c -fPIC -O2 -o test.o test.cc
$ aarch64-linux-android-objdump -d test.o

test.o:     file format elf64-littleaarch64


Disassembly of section .text:

0000000000000000 <_Z3foov>:
   0:   a9bf7bfd        stp     x29, x30, [sp,#-16]!
   4:   52808000        mov     w0, #0x400                      // #1024
   8:   910003fd        mov     x29, sp
   c:   94000000        bl      0 <_Z6malloci>
  10:   91002800        add     x0, x0, #0xa
  14:   a8c17bfd        ldp     x29, x30, [sp],#16
  18:   d65f03c0        ret


-----------------------------------------
-----------------------------------------

$ aarch64-linux-android-g++ -c -fPIC -O2 -o test.o test.cc -fomit-frame-pointer
$ aarch64-linux-android-objdump -d test.o

test.o:     file format elf64-littleaarch64


Disassembly of section .text:

0000000000000000 <_Z3foov>:
   0:   d10043ff        sub     sp, sp, #0x10
   4:   52808000        mov     w0, #0x400                      // #1024
   8:   f90003fe        str     x30, [sp]
   c:   94000000        bl      0 <_Z6malloci>
  10:   f94003fe        ldr     x30, [sp]
  14:   91002800        add     x0, x0, #0xa
  18:   910043ff        add     sp, sp, #0x10
  1c:   d65f03c0        ret