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files >> //opt/hc_python/lib64/python3.8/site-packages/greenlet/platform/switch_arm32_ios.h
/* * this is the internal transfer function. * * HISTORY * 31-May-15 iOS support. Ported from arm32. Proton <feisuzhu@163.com> * * NOTES * * It is not possible to detect if fp is used or not, so the supplied * switch function needs to support it, so that you can remove it if * it does not apply to you. * * POSSIBLE ERRORS * * "fp cannot be used in asm here" * * - Try commenting out "fp" in REGS_TO_SAVE. * */ #define STACK_REFPLUS 1 #ifdef SLP_EVAL #define STACK_MAGIC 0 #define REG_SP "sp" #define REG_SPSP "sp,sp" #define REG_FP "r7" #define REG_FPFP "r7,r7" #define REGS_TO_SAVE_GENERAL "r4", "r5", "r6", "r8", "r10", "r11", "lr" #define REGS_TO_SAVE REGS_TO_SAVE_GENERAL, "d8", "d9", "d10", "d11", \ "d12", "d13", "d14", "d15" static int #ifdef __GNUC__ __attribute__((optimize("no-omit-frame-pointer"))) #endif slp_switch(void) { void *fp; int *stackref, stsizediff, result; __asm__ volatile ("" : : : REGS_TO_SAVE); __asm__ volatile ("str " REG_FP ",%0" : "=m" (fp)); __asm__ ("mov %0," REG_SP : "=r" (stackref)); { SLP_SAVE_STATE(stackref, stsizediff); __asm__ volatile ( "add " REG_SPSP ",%0\n" "add " REG_FPFP ",%0\n" : : "r" (stsizediff) : REGS_TO_SAVE /* Clobber registers, force compiler to * recalculate address of void *fp from REG_SP or REG_FP */ ); SLP_RESTORE_STATE(); } __asm__ volatile ( "ldr " REG_FP ", %1\n\t" "mov %0, #0" : "=r" (result) : "m" (fp) : REGS_TO_SAVE /* Force compiler to restore saved registers after this */ ); return result; } #endif
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