riscv/musl - musl - Gitea: Git with a cup of tea

201 Commits

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78 Tags

7.6 MiB

Tree: 462dbfc207

Commit Graph

Author	SHA1	Message	Date
Rich Felker	d00ff2950e	overhaul syscall interface this commit shuffles around the location of syscall definitions so that we can make a syscall() library function with both SYS_* and __NR_* style syscall names available to user applications, provides the syscall() library function, and optimizes the code that performs the actual inline syscalls in the library itself. previously on i386 when built as PIC (shared library), syscalls were incurring bus lock (lock prefix) overhead at entry and exit, due to the way the ebx register was being loaded (xchg instruction with a memory operand). now the xchg takes place between two registers. further cleanup to arch/$(ARCH)/syscall.h is planned.	15 years ago

Author

SHA1

Message

Date

Rich Felker

d00ff2950e

overhaul syscall interface

this commit shuffles around the location of syscall definitions so
that we can make a syscall() library function with both SYS_* and
__NR_* style syscall names available to user applications, provides
the syscall() library function, and optimizes the code that performs
the actual inline syscalls in the library itself.

previously on i386 when built as PIC (shared library), syscalls were
incurring bus lock (lock prefix) overhead at entry and exit, due to
the way the ebx register was being loaded (xchg instruction with a
memory operand). now the xchg takes place between two registers.

further cleanup to arch/$(ARCH)/syscall.h is planned.

15 years ago

1 Commits (462dbfc20788a6c9dd1ea4bb1cef086aa189615a)