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gh-151040: Fix test_c_stack_unwind on riscv64 #152370

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gh-151040: Fix test_c_stack_unwind on riscv64 #152370

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5 changes: 5 additions & 0 deletions Modules/_testinternalcapi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -98,6 +98,11 @@ static const uintptr_t min_frame_pointer_addr = 0x1000;
// https://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.html#STACK
# define FRAME_POINTER_NEXT_OFFSET 0
# define FRAME_POINTER_RETURN_OFFSET 2
#elif defined(__riscv)
// RISC-V saves the return address at fp[-1], and the previous frame pointer at fp[-2].
// See: https://riscv-non-isa.github.io/riscv-elf-psabi-doc/#_frame_pointer_convention
# define FRAME_POINTER_NEXT_OFFSET -2
# define FRAME_POINTER_RETURN_OFFSET -1
#else
# define FRAME_POINTER_NEXT_OFFSET 0
# define FRAME_POINTER_RETURN_OFFSET 1
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