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linux-user: Support tilegx architecture in linux-user 

Add main working flow feature, system call processing feature, and elf64
tilegx binary loading feature, based on Linux kernel tilegx 64-bit
implementation.

[rth: Moved all of the implementation of atomic instructions to a later patch.]

Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <BLU436-SMTP938552D42808AA60634582B9660@phx.gbl>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Chen Gang 2015-08-21 05:36:37 +08:00 committed by Richard Henderson
parent 2cb154bc19
commit b16189b222
4 changed files with 103 additions and 5 deletions
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2
include/elf.h
View File

@ -133,6 +133,8 @@ typedef int64_t Elf64_Sxword;
#define EM_AARCH64 183
#define EM_TILEGX 191 /* TILE-Gx */
/* This is the info that is needed to parse the dynamic section of the file */
#define DT_NULL 0
#define DT_NEEDED 1

23
linux-user/elfload.c
View File

@ -1218,6 +1218,29 @@ static inline void init_thread(struct target_pt_regs *regs, struct image_info *i
#endif /* TARGET_S390X */
#ifdef TARGET_TILEGX
/* 42 bits real used address, a half for user mode */
#define ELF_START_MMAP (0x00000020000000000ULL)
#define elf_check_arch(x) ((x) == EM_TILEGX)
#define ELF_CLASS ELFCLASS64
#define ELF_DATA ELFDATA2LSB
#define ELF_ARCH EM_TILEGX
static inline void init_thread(struct target_pt_regs *regs,
struct image_info *infop)
{
regs->pc = infop->entry;
regs->sp = infop->start_stack;
}
#define ELF_EXEC_PAGESIZE 65536 /* TILE-Gx page size is 64KB */
#endif /* TARGET_TILEGX */
#ifndef ELF_PLATFORM
#define ELF_PLATFORM (NULL)
#endif

69
linux-user/main.c
View File

@ -3412,6 +3412,64 @@ void cpu_loop(CPUS390XState *env)
#endif /* TARGET_S390X */
#ifdef TARGET_TILEGX
static void gen_sigsegv_maperr(CPUTLGState *env, target_ulong addr)
{
target_siginfo_t info;
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_MAPERR;
info._sifields._sigfault._addr = addr;
queue_signal(env, info.si_signo, &info);
}
static void gen_sigill_reg(CPUTLGState *env)
{
target_siginfo_t info;
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_PRVREG;
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, &info);
}
void cpu_loop(CPUTLGState *env)
{
CPUState *cs = CPU(tilegx_env_get_cpu(env));
int trapnr;
while (1) {
cpu_exec_start(cs);
trapnr = cpu_tilegx_exec(cs);
cpu_exec_end(cs);
switch (trapnr) {
case TILEGX_EXCP_SYSCALL:
env->regs[TILEGX_R_RE] = do_syscall(env, env->regs[TILEGX_R_NR],
env->regs[0], env->regs[1],
env->regs[2], env->regs[3],
env->regs[4], env->regs[5],
env->regs[6], env->regs[7]);
env->regs[TILEGX_R_ERR] = TILEGX_IS_ERRNO(env->regs[TILEGX_R_RE])
? - env->regs[TILEGX_R_RE]
: 0;
break;
case TILEGX_EXCP_REG_IDN_ACCESS:
case TILEGX_EXCP_REG_UDN_ACCESS:
gen_sigill_reg(env);
break;
default:
fprintf(stderr, "trapnr is %d[0x%x].\n", trapnr, trapnr);
g_assert_not_reached();
}
process_pending_signals(env);
}
}
#endif
THREAD CPUState *thread_cpu;
void task_settid(TaskState *ts)
@ -4377,6 +4435,17 @@ int main(int argc, char **argv, char **envp)
env->psw.mask = regs->psw.mask;
env->psw.addr = regs->psw.addr;
}
#elif defined(TARGET_TILEGX)
{
int i;
for (i = 0; i < TILEGX_R_COUNT; i++) {
env->regs[i] = regs->regs[i];
}
for (i = 0; i < TILEGX_SPR_COUNT; i++) {
env->spregs[i] = 0;
}
env->pc = regs->pc;
}
#else
#error unsupported target CPU
#endif

14
linux-user/syscall_defs.h
View File

@ -64,8 +64,9 @@
#endif
#if defined(TARGET_I386) || defined(TARGET_ARM) || defined(TARGET_SH4) \
|| defined(TARGET_M68K) || defined(TARGET_CRIS) || defined(TARGET_UNICORE32) \
|| defined(TARGET_S390X) || defined(TARGET_OPENRISC)
|| defined(TARGET_M68K) || defined(TARGET_CRIS) \
|| defined(TARGET_UNICORE32) || defined(TARGET_S390X) \
|| defined(TARGET_OPENRISC) || defined(TARGET_TILEGX)
#define TARGET_IOC_SIZEBITS 14
#define TARGET_IOC_DIRBITS 2
@ -365,7 +366,8 @@ int do_sigaction(int sig, const struct target_sigaction *act,
|| defined(TARGET_PPC) || defined(TARGET_MIPS) || defined(TARGET_SH4) \
|| defined(TARGET_M68K) || defined(TARGET_ALPHA) || defined(TARGET_CRIS) \
|| defined(TARGET_MICROBLAZE) || defined(TARGET_UNICORE32) \
|| defined(TARGET_S390X) || defined(TARGET_OPENRISC)
|| defined(TARGET_S390X) || defined(TARGET_OPENRISC) \
|| defined(TARGET_TILEGX)
#if defined(TARGET_SPARC)
#define TARGET_SA_NOCLDSTOP 8u
@ -1871,7 +1873,7 @@ struct target_stat {
abi_ulong target_st_ctime_nsec;
unsigned int __unused[2];
};
#elif defined(TARGET_OPENRISC)
#elif defined(TARGET_OPENRISC) || defined(TARGET_TILEGX)
/* These are the asm-generic versions of the stat and stat64 structures */
@ -2264,7 +2266,9 @@ struct target_flock {
struct target_flock64 {
short l_type;
short l_whence;
#if defined(TARGET_PPC) || defined(TARGET_X86_64) || defined(TARGET_MIPS) || defined(TARGET_SPARC) || defined(TARGET_HPPA) || defined (TARGET_MICROBLAZE)
#if defined(TARGET_PPC) || defined(TARGET_X86_64) || defined(TARGET_MIPS) \
|| defined(TARGET_SPARC) || defined(TARGET_HPPA) \
|| defined(TARGET_MICROBLAZE) || defined(TARGET_TILEGX)
int __pad;
#endif
unsigned long long l_start;