From 4392124e26e699df38cf34dbbac6baeaa243271c Mon Sep 17 00:00:00 2001 From: Pavel Pisa Date: Thu, 14 Feb 2019 00:42:42 +0100 Subject: Implemented sys_set_thread_area and sys_writev syscalls. The example Linux program compiled against musl library reaches main and displays printf output. Signed-off-by: Pavel Pisa --- qtmips_osemu/ossyscall.cpp | 47 ++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 45 insertions(+), 2 deletions(-) (limited to 'qtmips_osemu/ossyscall.cpp') diff --git a/qtmips_osemu/ossyscall.cpp b/qtmips_osemu/ossyscall.cpp index 79052da..584a011 100644 --- a/qtmips_osemu/ossyscall.cpp +++ b/qtmips_osemu/ossyscall.cpp @@ -205,7 +205,7 @@ static const mips_syscall_desc_t mips_syscall_args[] = { MIPS_SYS(sys_flock , 2, syscall_default_handler) MIPS_SYS(sys_msync , 3, syscall_default_handler) MIPS_SYS(sys_readv , 3, syscall_default_handler) /* 4145 */ - MIPS_SYS(sys_writev , 3, syscall_default_handler) + MIPS_SYS(sys_writev , 3, do_sys_writev) MIPS_SYS(sys_cacheflush , 3, syscall_default_handler) MIPS_SYS(sys_cachectl , 3, syscall_default_handler) MIPS_SYS(sys_sysmips , 4, syscall_default_handler) @@ -342,7 +342,7 @@ static const mips_syscall_desc_t mips_syscall_args[] = { MIPS_SYS(sys_add_key , 5, syscall_default_handler) MIPS_SYS(sys_request_key, 4, syscall_default_handler) MIPS_SYS(sys_keyctl , 5, syscall_default_handler) - MIPS_SYS(sys_set_thread_area, 1, syscall_default_handler) + MIPS_SYS(sys_set_thread_area, 1, do_sys_set_thread_area) MIPS_SYS(sys_inotify_init, 0, syscall_default_handler) MIPS_SYS(sys_inotify_add_watch, 3, syscall_default_handler) /* 4285 */ MIPS_SYS(sys_inotify_rm_watch, 2, syscall_default_handler) @@ -514,7 +514,50 @@ int OsSyscallExceptionHandler::syscall_default_handler(std::uint32_t &result, Co (unsigned long)a3, (unsigned long)a4); #endif + (void)core; (void)syscall_num; (void)a1; (void)a2; (void)a3; (void)a4; (void)a5; (void)a6; (void)a7; (void)a8; result = 0; return 0; } + +int OsSyscallExceptionHandler::do_sys_set_thread_area(std::uint32_t &result, Core *core, + std::uint32_t syscall_num, + std::uint32_t a1, std::uint32_t a2, std::uint32_t a3, + std::uint32_t a4, std::uint32_t a5, std::uint32_t a6, + std::uint32_t a7, std::uint32_t a8) { + (void)core; (void)syscall_num; + (void)a1; (void)a2; (void)a3; (void)a4; (void)a5; (void)a6; (void)a7; (void)a8; + core->set_c0_userlocal(a1); + result = 0; + return 0; +} + +// ssize_t writev(int fd, const struct iovec *iov, int iovcnt); +int OsSyscallExceptionHandler::do_sys_writev(std::uint32_t &result, Core *core, + std::uint32_t syscall_num, + std::uint32_t a1, std::uint32_t a2, std::uint32_t a3, + std::uint32_t a4, std::uint32_t a5, std::uint32_t a6, + std::uint32_t a7, std::uint32_t a8) { + (void)core; (void)syscall_num; + (void)a1; (void)a2; (void)a3; (void)a4; (void)a5; (void)a6; (void)a7; (void)a8; + + result = 0; + int fd = a1; + std::uint32_t iov = a2; + int iovcnt = a3; + MemoryAccess *mem = core->get_mem_data(); + + printf("sys_writev to fd %d\n", fd); + + while (iovcnt-- > 0) { + std::uint32_t iov_base = mem->read_word(iov); + std::uint32_t iov_len = mem->read_word(iov + 4); + iov += 8; + for (std::uint32_t i = 0; i < iov_len; i++) { + printf("%c", mem->read_byte(iov_base++)); + } + result += iov_len; + } + + return 0; +} -- cgit v1.2.3