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  /src/sys/arch/riscv/riscv/
syscall.c 82 register_t *args = &tf->tf_a0;
102 printf("syscall: _syscall code %#"PRIxREGISTER"\n", tf->tf_a0);
229 tf->tf_a0 = retval[0];
239 tf->tf_a0, tf->tf_a1, tf->tf_pc);
252 tf->tf_a0 = error;
sig_machdep.c 128 tf->tf_a0 = signo;
db_machdep.c 74 { "a0", (void *)offsetof(struct trapframe, tf_a0), db_rw_ddbreg, NULL },
riscv_machdep.c 178 tf->tf_a0 = 0; // cleanup
196 tf->tf_a0 = 0;
trap.c 99 tf->tf_a0 = error;
  /src/sys/arch/riscv/include/
frame.h 54 #define tf_a0 tf_reg[_X_A0] macro

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