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This adds a simple handling for this syscall in order to make newlib happy. --- sim/riscv/sim-main.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/sim/riscv/sim-main.c b/sim/riscv/sim-main.c index 9c0d070aa60..4e3672505c6 100644 --- a/sim/riscv/sim-main.c +++ b/sim/riscv/sim-main.c @@ -30,6 +30,7 @@ #include "sim-main.h" #include "sim-signal.h" #include "sim-syscall.h" +#include "target-newlib-syscall.h" #include "opcode/riscv.h" @@ -629,6 +630,14 @@ execute_i (SIM_CPU *cpu, unsigned_word iw, const struct riscv_opcode *op) break; case MATCH_ECALL: TRACE_INSN (cpu, "ecall;"); + if (riscv_cpu->a7 == TARGET_NEWLIB_RISCV_SYS_brk) + { + TRACE_SYSCALL (cpu, "brk[%i](%#lx)", TARGET_NEWLIB_RISCV_SYS_brk, + (long)riscv_cpu->a0); + if (riscv_cpu->a0 == 0) + riscv_cpu->a0 = DEFAULT_MEM_SIZE / 2; + break; + } riscv_cpu->a0 = sim_syscall (cpu, riscv_cpu->a7, riscv_cpu->a0, riscv_cpu->a1, riscv_cpu->a2, riscv_cpu->a3); break; -- 2.25.1