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Add REGISTERS_CLOBBERED_BY_SYSCALL for x86-64
X86-64 system calls use a different calling convention, which clobbers CC, %r11 an %rcx registers. Define REGISTERS_CLOBBERED_BY_SYSCALL for x86-64 inline asm statements. * sysdeps/unix/sysv/linux/x86_64/sysdep.h (REGISTERS_CLOBBERED_BY_SYSCALL): New. (INTERNAL_SYSCALL_NCS): Use it. (INTERNAL_SYSCALL_NCS_TYPES): Likewise.
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@ -1,3 +1,10 @@
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2015-12-16 H.J. Lu <hongjiu.lu@intel.com>
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* sysdeps/unix/sysv/linux/x86_64/sysdep.h
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(REGISTERS_CLOBBERED_BY_SYSCALL): New.
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(INTERNAL_SYSCALL_NCS): Use it.
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(INTERNAL_SYSCALL_NCS_TYPES): Likewise.
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2015-12-16 Florian Weimer <fweimer@redhat.com>
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2015-12-16 Florian Weimer <fweimer@redhat.com>
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[BZ #19243]
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[BZ #19243]
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@ -218,6 +218,9 @@
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# undef INTERNAL_SYSCALL_DECL
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# undef INTERNAL_SYSCALL_DECL
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# define INTERNAL_SYSCALL_DECL(err) do { } while (0)
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# define INTERNAL_SYSCALL_DECL(err) do { } while (0)
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/* Registers clobbered by syscall. */
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# define REGISTERS_CLOBBERED_BY_SYSCALL "cc", "r11", "cx"
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# define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
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# define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
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({ \
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({ \
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unsigned long int resultvar; \
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unsigned long int resultvar; \
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@ -226,7 +229,7 @@
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asm volatile ( \
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asm volatile ( \
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"syscall\n\t" \
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"syscall\n\t" \
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: "=a" (resultvar) \
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: "=a" (resultvar) \
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: "0" (name) ASM_ARGS_##nr : "memory", "cc", "r11", "cx"); \
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: "0" (name) ASM_ARGS_##nr : "memory", REGISTERS_CLOBBERED_BY_SYSCALL); \
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(long int) resultvar; })
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(long int) resultvar; })
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# undef INTERNAL_SYSCALL
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# undef INTERNAL_SYSCALL
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# define INTERNAL_SYSCALL(name, err, nr, args...) \
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# define INTERNAL_SYSCALL(name, err, nr, args...) \
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@ -240,7 +243,7 @@
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asm volatile ( \
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asm volatile ( \
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"syscall\n\t" \
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"syscall\n\t" \
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: "=a" (resultvar) \
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: "=a" (resultvar) \
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: "0" (name) ASM_ARGS_##nr : "memory", "cc", "r11", "cx"); \
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: "0" (name) ASM_ARGS_##nr : "memory", REGISTERS_CLOBBERED_BY_SYSCALL); \
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(long int) resultvar; })
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(long int) resultvar; })
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# undef INTERNAL_SYSCALL_TYPES
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# undef INTERNAL_SYSCALL_TYPES
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# define INTERNAL_SYSCALL_TYPES(name, err, nr, args...) \
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# define INTERNAL_SYSCALL_TYPES(name, err, nr, args...) \
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