mirror of
https://github.com/frida/tinycc
synced 2024-11-28 02:29:38 +03:00
56db092ab7
- revert Makefiles to state before last bcheck additions Instead, just load bcheck.o explicitly if that is what is wanted. - move tcc_add_bcheck() to the <target>-link.c files and remove revently added arguments. This function is to support tccelf.c with linking, not for tccgen.c to support compilation. - remove -ba option: It said: "-ba Enable better address checking with bounds checker" Okay, if it is better then to have it is not an option. - remove va_copy. It is C99 and we try to stay C89 in tinycc when possible. For example, MS compilers do not have va_copy. - win64: revert any 'fixes' to alloca It was correct as it was before, except for bound_checking where it was not implemented. This should now work too. - remove parasitic filename:linenum features Such feature is already present with rt_printline in tccrun.c. If it doesn't work it can be fixed. - revert changes to gen_bounded_ptr_add() gen_bounded_ptr_add() was working as it should before (mostly). For the sake of simplicity I switched it to CDECL. Anyway, FASTCALL means SLOWCALL with tinycc. In exchange you get one addition which is required for bounds_cnecking function arguments. The important thing is to check them *BEFORE* they are loaded into registers. New function gbound_args() does that. In any case, code instrumentation with the bounds-check functions as such now seems to work flawlessly again, which means when they are inserted as NOPs, any code that tcc can compile, seems to behave just the same as without them. What these functions then do when fully enabled, is a differnt story. I did not touch this.
47 lines
945 B
ArmAsm
47 lines
945 B
ArmAsm
/* ---------------------------------------------- */
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/* alloca86_64.S */
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.globl __bound_alloca
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__bound_alloca:
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#ifdef _WIN32
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inc %rcx # add one extra to separate regions
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jmp alloca
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.globl __bound_alloca_nr
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__bound_alloca_nr:
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dec %rcx
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push %rax
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mov %rcx,%rdx
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mov %rax,%rcx
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sub $32,%rsp
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call __bound_new_region
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add $32,%rsp
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pop %rax
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ret
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#else
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pop %rdx
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mov %rdi,%rax
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mov %rax,%rsi # size, a second parm to the __bound_new_region
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add $15 + 1,%rax # add one extra to separate regions
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and $-16,%rax
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jz p3
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sub %rax,%rsp
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mov %rsp,%rdi # pointer, a first parm to the __bound_new_region
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mov %rsp,%rax
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push %rdx
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push %rax
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call __bound_new_region
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pop %rax
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pop %rdx
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p3:
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push %rdx
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ret
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#endif
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/* ---------------------------------------------- */
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