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Wed, 28 Aug 2024 02:53:33 -0700 (PDT) Received: from localhost.localdomain ([220.253.126.131]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7143430f6e7sm9787508b3a.160.2024.08.28.02.53.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 28 Aug 2024 02:53:33 -0700 (PDT) From: Ajeet Singh X-Google-Original-From: Ajeet Singh To: qemu-devel@nongnu.org Cc: Mark Corbin , Warner Losh , Ajeet Singh , Richard Henderson Subject: [PATCH v4 15/17] bsd-user: Implement 'get_mcontext' for RISC-V Date: Wed, 28 Aug 2024 19:52:41 +1000 Message-Id: <20240828095243.90491-16-itachis@FreeBSD.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240828095243.90491-1-itachis@FreeBSD.org> References: <20240828095243.90491-1-itachis@FreeBSD.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::434; envelope-from=itachis6234@gmail.com; helo=mail-pf1-x434.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Mark Corbin Added the 'get_mcontext' function to extract and populate the RISC-V machine context from the CPU state. This function is used to gather the current state of the general-purpose registers and store it in a 'target_mcontext_' structure. Signed-off-by: Mark Corbin Signed-off-by: Ajeet Singh Signed-off-by: Warner Losh Co-authored-by: Warner Losh Reviewed-by: Richard Henderson --- bsd-user/riscv/signal.c | 53 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/bsd-user/riscv/signal.c b/bsd-user/riscv/signal.c index 2597fec2fd..072ad821d2 100644 --- a/bsd-user/riscv/signal.c +++ b/bsd-user/riscv/signal.c @@ -61,3 +61,56 @@ abi_long setup_sigframe_arch(CPURISCVState *env, abi_ulong frame_addr, get_mcontext(env, mcp, flags); return 0; } + +/* + * Compare with get_mcontext() in riscv/riscv/machdep.c + * Assumes that the memory is locked if mcp points to user memory. + */ +abi_long get_mcontext(CPURISCVState *regs, target_mcontext_t *mcp, + int flags) +{ + + mcp->mc_gpregs.gp_t[0] = tswap64(regs->gpr[5]); + mcp->mc_gpregs.gp_t[1] = tswap64(regs->gpr[6]); + mcp->mc_gpregs.gp_t[2] = tswap64(regs->gpr[7]); + mcp->mc_gpregs.gp_t[3] = tswap64(regs->gpr[28]); + mcp->mc_gpregs.gp_t[4] = tswap64(regs->gpr[29]); + mcp->mc_gpregs.gp_t[5] = tswap64(regs->gpr[30]); + mcp->mc_gpregs.gp_t[6] = tswap64(regs->gpr[31]); + + mcp->mc_gpregs.gp_s[0] = tswap64(regs->gpr[8]); + mcp->mc_gpregs.gp_s[1] = tswap64(regs->gpr[9]); + mcp->mc_gpregs.gp_s[2] = tswap64(regs->gpr[18]); + mcp->mc_gpregs.gp_s[3] = tswap64(regs->gpr[19]); + mcp->mc_gpregs.gp_s[4] = tswap64(regs->gpr[20]); + mcp->mc_gpregs.gp_s[5] = tswap64(regs->gpr[21]); + mcp->mc_gpregs.gp_s[6] = tswap64(regs->gpr[22]); + mcp->mc_gpregs.gp_s[7] = tswap64(regs->gpr[23]); + mcp->mc_gpregs.gp_s[8] = tswap64(regs->gpr[24]); + mcp->mc_gpregs.gp_s[9] = tswap64(regs->gpr[25]); + mcp->mc_gpregs.gp_s[10] = tswap64(regs->gpr[26]); + mcp->mc_gpregs.gp_s[11] = tswap64(regs->gpr[27]); + + mcp->mc_gpregs.gp_a[0] = tswap64(regs->gpr[10]); + mcp->mc_gpregs.gp_a[1] = tswap64(regs->gpr[11]); + mcp->mc_gpregs.gp_a[2] = tswap64(regs->gpr[12]); + mcp->mc_gpregs.gp_a[3] = tswap64(regs->gpr[13]); + mcp->mc_gpregs.gp_a[4] = tswap64(regs->gpr[14]); + mcp->mc_gpregs.gp_a[5] = tswap64(regs->gpr[15]); + mcp->mc_gpregs.gp_a[6] = tswap64(regs->gpr[16]); + mcp->mc_gpregs.gp_a[7] = tswap64(regs->gpr[17]); + + if (flags & TARGET_MC_GET_CLEAR_RET) { + mcp->mc_gpregs.gp_a[0] = 0; /* a0 */ + mcp->mc_gpregs.gp_a[1] = 0; /* a1 */ + mcp->mc_gpregs.gp_t[0] = 0; /* clear syscall error */ + } + + mcp->mc_gpregs.gp_ra = tswap64(regs->gpr[1]); + mcp->mc_gpregs.gp_sp = tswap64(regs->gpr[2]); + mcp->mc_gpregs.gp_gp = tswap64(regs->gpr[3]); + mcp->mc_gpregs.gp_tp = tswap64(regs->gpr[4]); + mcp->mc_gpregs.gp_sepc = tswap64(regs->pc); + + return 0; +}