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Make ASM safer for thumb/cortex-m #29

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Make ASM safer for thumb/cortex-m #29

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27 changes: 24 additions & 3 deletions minicoro.h
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Original file line number Diff line number Diff line change
Expand Up @@ -1114,13 +1114,23 @@ int _mco_switch(_mco_ctxbuf* from, _mco_ctxbuf* to);

__asm__(
".text\n"
#if defined(__thumb__)
".thumb\n"
#endif
".syntax unified\n"
#ifdef __APPLE__
".globl __mco_switch\n"
#if defined(__thumb__)
".thumb_func\n"
#endif
"__mco_switch:\n"
#else
".globl _mco_switch\n"
".type _mco_switch #function\n"
".type _mco_switch, %function\n"
".hidden _mco_switch\n"
#if defined(__thumb__)
".thumb_func\n"
#endif
"_mco_switch:\n"
#endif
#ifndef __SOFTFP__
Expand All @@ -1132,21 +1142,32 @@ __asm__(
" vldmia r1!, {d8-d15}\n"
#endif
" ldr sp, [r1, #9*4]\n"
" ldmia r1, {r4-r11, pc}\n"
" ldmia r1, {r4-r11, lr}\n"
" bx lr\n"
#ifndef __APPLE__
".size _mco_switch, .-_mco_switch\n"
#endif
);

__asm__(
".text\n"
#if defined(__thumb__)
".thumb\n"
#endif
".syntax unified\n"
#ifdef __APPLE__
".globl __mco_wrap_main\n"
#if defined(__thumb__)
".thumb_func\n"
#endif
"__mco_wrap_main:\n"
#else
".globl _mco_wrap_main\n"
".type _mco_wrap_main #function\n"
".type _mco_wrap_main, %function\n"
".hidden _mco_wrap_main\n"
#if defined(__thumb__)
".thumb_func\n"
#endif
"_mco_wrap_main:\n"
#endif
" mov r0, r4\n"
Expand Down