Displaying 2 results from an estimated 2 matches for "__syscall_stub_start".
2009 May 14
0
[LLVMdev] Grouping related functions in a code section
...map this page in.
One purpose of this page of code is that it contains a SIGSEGV handler. The
newly forked process promptly installs this signal handler, and uses a
function stored in this code.
Here's an outline of the whole process:
// In the newly-cloned process, map in the magic page
// __syscall_stub_start defined in linker script
fd = phys_mapping(to_phys(&__syscall_stub_start), &offset);
// Get executable permission:
addr = mmap64((void *) STUB_CODE, UM_KERN_PAGE_SIZE,
PROT_EXEC, MAP_FIXED | MAP_PRIVATE, fd, offset);
The previous code maps the page of code into memory: the...
2009 May 11
3
[LLVMdev] Assign symbol the address of a section
Hello,
The binaries produced by LLVM and other compilers divide code up into
various sections, e.g. the .text section.
What is the recommended approach to assigning a symbol the address of a
section using LLVM? Using GCC/LD, you can do this with a linker script,
e.g. in a linker script you can do:
_text = .;
_stext = .;
These symbols are then available in the corresponding C code using an