tinycc/lib/alloca86-bt.S

/* ---------------------------------------------- */
/* alloca86-bt.S */

#ifdef __leading_underscore
# define _(s) _##s
#else
# define _(s) s
#endif

.globl _(__bound_alloca)
_(__bound_alloca):
    pop     %edx
    pop     %eax
    mov     %eax, %ecx
    add     $3+1,%eax
    and     $-4,%eax
    jz      p6

#ifdef _WIN32
p4:
    cmp     $4096,%eax
    jbe     p5
    test    %eax,-4096(%esp)
    sub     $4096,%esp
    sub     $4096,%eax
    jmp p4

p5:
#endif

    sub     %eax,%esp
    mov     %esp,%eax

    push    %edx
    push    %eax
    push    %ecx
    push    %eax
    call    _(__bound_new_region)
    add     $8, %esp
    pop     %eax
    pop     %edx

p6:
    push    %edx
    push    %edx
    ret

/* mark stack as nonexecutable */
#if defined __ELF__ && defined __linux__
    .section    .note.GNU-stack,"",@progbits
#endif
/* ---------------------------------------------- */
New files: alloca86.S alloca86-bt.S 2007-11-23 08:03:03 +08:00			`/* ---------------------------------------------- */`
x86-64: chkstk, alloca 2009-07-19 04:06:54 +08:00			`/* alloca86-bt.S */`
New files: alloca86.S alloca86-bt.S 2007-11-23 08:03:03 +08:00
rework leading underscores tested on win32/64 to pass the tests when enabled - libtcc.c : let tcc define __leading_underscore if enabled tcc_add_symbol() : add _ automatically - tccelf.c : remove tcc_get_symbol_err(), find_c_sym() currently symbol length is limited to 256 in several places, so we can use a fixed local buffer for now as well. - win32/lib/crtinit.c : new file for init/fini - lib/.S, tests7 : use __leading_underscore - bt-log.c: this file wont work relibaly if compiled with gcc 2020-06-27 23:15:06 +08:00			`#ifdef __leading_underscore`
			`# define _(s) _##s`
			`#else`
			`# define _(s) s`
			`#endif`
New files: alloca86.S alloca86-bt.S 2007-11-23 08:03:03 +08:00
rework leading underscores tested on win32/64 to pass the tests when enabled - libtcc.c : let tcc define __leading_underscore if enabled tcc_add_symbol() : add _ automatically - tccelf.c : remove tcc_get_symbol_err(), find_c_sym() currently symbol length is limited to 256 in several places, so we can use a fixed local buffer for now as well. - win32/lib/crtinit.c : new file for init/fini - lib/.S, tests7 : use __leading_underscore - bt-log.c: this file wont work relibaly if compiled with gcc 2020-06-27 23:15:06 +08:00			`.globl _(__bound_alloca)`
			`_(__bound_alloca):`
New files: alloca86.S alloca86-bt.S 2007-11-23 08:03:03 +08:00			`pop %edx`
			`pop %eax`
			`mov %eax, %ecx`
Bound checking fixes tccgen.c: - Fix 'tcc -b conftest.s' - Add offset during bound checking for struct return lib/bcheck.c: - Check overlap when reusing vla/alloca arm-gen.c: arm64-gen.c: riscv64-gen.c: lib/alloca86-bt.S: - add space for vla/alloca during bound checking tests/tests2/Makefile: tests/tests2/121_struct_return: tests/tests2/122_vla_reuse: - New test cases with bound checking enabled to test vla and struct return 2020-10-01 23:09:09 +08:00			`add $3+1,%eax`
New files: alloca86.S alloca86-bt.S 2007-11-23 08:03:03 +08:00			`and $-4,%eax`
			`jz p6`

tccgen: nodata_wanted fix, default ONE_SOURCE, etc... tccgen.c: doubles need to be aligned, on ARM. The section_reserve() in init_putv does not do that. -D ONE_SOURCE: is now the default and not longer needed. Also, tcc.h now sets the default native target. These both make compiling tcc simple as "gcc tcc.c -o tcc -ldl" again. arm-asm.c: enable pseudo asm also for inline asm tests/tests2/Makefile: disable bitfield tests except on windows and x86_64 and don't generate-always tcc.c: fix a loop with -dt on errors configure: print compiler version (as recognized) tccpp.c: actually define symbols for tcc -dt clear static variables (needed for -dt or libtcc usage) 96_nodata_wanted.c: use __label__ instead of asm lib/files: use native symbols (__i386__ etc.) instead of TCC_TARGET_... 2017-07-24 03:24:11 +08:00			`#ifdef _WIN32`
New files: alloca86.S alloca86-bt.S 2007-11-23 08:03:03 +08:00			`p4:`
			`cmp $4096,%eax`
Fix mistake. Change jb by jbe. tiny c round (INT_MAX = 0x7FFFFFFF) to a DWORD boundary and it becomes 0x80000000. Jle treats as -214783648, but Jbe treats as 214783648. Thanks to Jason Hood for explain me this. 2014-07-11 08:41:51 +08:00			`jbe p5`
Fix problem using alloca function, executable crashed even with a exception handler function, when try to allocate INT_MAX. Patch provided by Jason Hood in private e-mail, when I ask to him for help. He say: Feel free to pass it on to the mailing list. 2014-07-10 12:37:20 +08:00			`test %eax,-4096(%esp)`
New files: alloca86.S alloca86-bt.S 2007-11-23 08:03:03 +08:00			`sub $4096,%esp`
			`sub $4096,%eax`
			`jmp p4`

			`p5:`
Just warn about unknown directives, define __STDC_VERSION__=199901L 2008-01-17 04:16:35 +08:00			`#endif`

New files: alloca86.S alloca86-bt.S 2007-11-23 08:03:03 +08:00			`sub %eax,%esp`
			`mov %esp,%eax`

			`push %edx`
			`push %eax`
			`push %ecx`
			`push %eax`
rework leading underscores tested on win32/64 to pass the tests when enabled - libtcc.c : let tcc define __leading_underscore if enabled tcc_add_symbol() : add _ automatically - tccelf.c : remove tcc_get_symbol_err(), find_c_sym() currently symbol length is limited to 256 in several places, so we can use a fixed local buffer for now as well. - win32/lib/crtinit.c : new file for init/fini - lib/.S, tests7 : use __leading_underscore - bt-log.c: this file wont work relibaly if compiled with gcc 2020-06-27 23:15:06 +08:00			`call _(__bound_new_region)`
			`add $8, %esp`
New files: alloca86.S alloca86-bt.S 2007-11-23 08:03:03 +08:00			`pop %eax`
			`pop %edx`

			`p6:`
			`push %edx`
			`push %edx`
			`ret`

lib/alloca*: mark ELF stack access flags as nonexecutable Signed-off-by: Sergei Trofimovich <st@anti-virus.by> 2011-01-04 16:38:52 +08:00			`/* mark stack as nonexecutable */`
			`#if defined __ELF__ && defined __linux__`
			`.section .note.GNU-stack,"",@progbits`
			`#endif`
New files: alloca86.S alloca86-bt.S 2007-11-23 08:03:03 +08:00			`/* ---------------------------------------------- */`