Author: bhushan.attarde Date: Mon Jan 11 21:48:43 2016 New Revision: 257441
URL: http://llvm.org/viewvc/llvm-project?rev=257441&view=rev Log: [LLDB][MIPS] Handle PIC calling convention for MIPS64 SUMMARY: This patch sets up register r25 with the address of function to be called in PrepareTrivialCall(). This is required as per MIPS PIC calling convention. Reviewers: clayborg Subscribers: mohit.bhakkad, sagar, jaydeep, lldb-commits Differential Revision: http://reviews.llvm.org/D16046 Modified: lldb/trunk/source/Plugins/ABI/SysV-mips64/ABISysV_mips64.cpp Modified: lldb/trunk/source/Plugins/ABI/SysV-mips64/ABISysV_mips64.cpp URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Plugins/ABI/SysV-mips64/ABISysV_mips64.cpp?rev=257441&r1=257440&r2=257441&view=diff ============================================================================== --- lldb/trunk/source/Plugins/ABI/SysV-mips64/ABISysV_mips64.cpp (original) +++ lldb/trunk/source/Plugins/ABI/SysV-mips64/ABISysV_mips64.cpp Mon Jan 11 21:48:43 2016 @@ -206,6 +206,7 @@ ABISysV_mips64::PrepareTrivialCall (Thre const RegisterInfo *pc_reg_info = reg_ctx->GetRegisterInfo (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC); const RegisterInfo *sp_reg_info = reg_ctx->GetRegisterInfo (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP); const RegisterInfo *ra_reg_info = reg_ctx->GetRegisterInfo (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_RA); + const RegisterInfo *r25_info = reg_ctx->GetRegisterInfoByName("r25", 0); if (log) log->Printf("Writing SP: 0x%" PRIx64, (uint64_t)sp); @@ -228,6 +229,13 @@ ABISysV_mips64::PrepareTrivialCall (Thre if (!reg_ctx->WriteRegisterFromUnsigned (pc_reg_info, func_addr)) return false; + if (log) + log->Printf("Writing r25: 0x%" PRIx64, (uint64_t)func_addr); + + // All callers of position independent functions must place the address of the called function in t9 (r25) + if (!reg_ctx->WriteRegisterFromUnsigned (r25_info, func_addr)) + return false; + return true; } _______________________________________________ lldb-commits mailing list lldb-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits
