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[86.9.131.95]) by smtp.gmail.com with ESMTPSA id s10-20020a05600c45ca00b0041401eb021asm92763wmo.24.2024.03.19.14.42.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 19 Mar 2024 14:42:49 -0700 (PDT) From: Stafford Horne To: GLIBC patches Cc: Linux OpenRISC , Stafford Horne Subject: [PATCH 1/4] or1k: Fix Linux user space signal ABI Date: Tue, 19 Mar 2024 21:42:41 +0000 Message-ID: <20240319214244.736981-2-shorne@gmail.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240319214244.736981-1-shorne@gmail.com> References: <20240319214244.736981-1-shorne@gmail.com> Precedence: bulk X-Mailing-List: linux-openrisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The OpenRISC sigcontext structure has always been defined as: struct user_regs_struct { /* GPR R0-R31... */ unsigned long gpr[32]; unsigned long pc; unsigned long sr; }; struct sigcontext { struct user_regs_struct regs; /* needs to be first */ unsigned long oldmask; /* unused */ }; With Linux v6.8 we added FPU support and repurposed the oldmask to use for the FPCSR (floating point control status register). struct sigcontext { struct user_regs_struct regs; /* needs to be first */ union { unsigned long fpcsr; unsigned long oldmask; /* unused */ }; }; The definition of mcontext_t was always missing the extra space for oldmask. This patch adds the field __fpcsr to mcontext_t to fix the ABI mismatch between glibc and Linux. --- sysdeps/unix/sysv/linux/or1k/sys/ucontext.h | 1 + 1 file changed, 1 insertion(+) diff --git a/sysdeps/unix/sysv/linux/or1k/sys/ucontext.h b/sysdeps/unix/sysv/linux/or1k/sys/ucontext.h index b17e919154..1b428592ee 100644 --- a/sysdeps/unix/sysv/linux/or1k/sys/ucontext.h +++ b/sysdeps/unix/sysv/linux/or1k/sys/ucontext.h @@ -38,6 +38,7 @@ typedef struct unsigned long int __gprs[__NGREG]; unsigned long int __pc; unsigned long int __sr; + unsigned long int __fpcsr; } mcontext_t; /* Userlevel context. */ -- 2.44.0