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linux-user: Add AArch64 support 

This patch adds support for AArch64 in all the small corners of
linux-user (primarily in image loading and startup code).

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: John Rigby <john.rigby@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1378235544-22290-22-git-send-email-peter.maydell@linaro.org
Message-id: 1368505980-17151-11-git-send-email-john.rigby@linaro.org
[PMM:
 * removed some unnecessary #defines from syscall.h
 * catch attempts to use a 32 bit only cpu with aarch64-linux-user
 * termios stuff moved into its own patch
 * we specify our minimum uname version here now
]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Alexander Graf 2013-09-03 20:12:21 +01:00 committed by Peter Maydell
parent 4a24a75810
commit 99033caee6
3 changed files with 38 additions and 2 deletions
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9
linux-user/aarch64/syscall.h Normal file
View File

@ -0,0 +1,9 @@
struct target_pt_regs {
uint64_t regs[31];
uint64_t sp;
uint64_t pc;
uint64_t pstate;
};
#define UNAME_MACHINE "aarch64"
#define UNAME_MINIMUM_RELEASE "3.8.0"

15
linux-user/elfload.c
View File

@ -269,16 +269,26 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *en
#define ELF_START_MMAP 0x80000000
#define elf_check_arch(x) ( (x) == EM_ARM )
#define elf_check_arch(x) ((x) == ELF_MACHINE)
#define ELF_ARCH ELF_MACHINE
#ifdef TARGET_AARCH64
#define ELF_CLASS ELFCLASS64
#else
#define ELF_CLASS ELFCLASS32
#define ELF_ARCH EM_ARM
#endif
static inline void init_thread(struct target_pt_regs *regs,
struct image_info *infop)
{
abi_long stack = infop->start_stack;
memset(regs, 0, sizeof(*regs));
#ifdef TARGET_AARCH64
regs->pc = infop->entry & ~0x3ULL;
regs->sp = stack;
#else
regs->ARM_cpsr = 0x10;
if (infop->entry & 1)
regs->ARM_cpsr |= CPSR_T;
@ -292,6 +302,7 @@ static inline void init_thread(struct target_pt_regs *regs,
/* For uClinux PIC binaries. */
/* XXX: Linux does this only on ARM with no MMU (do we care ?) */
regs->ARM_r10 = infop->start_data;
#endif
}
#define ELF_NREG 18

16
linux-user/main.c
View File

@ -3968,6 +3968,22 @@ int main(int argc, char **argv, char **envp)
cpu_x86_load_seg(env, R_FS, 0);
cpu_x86_load_seg(env, R_GS, 0);
#endif
#elif defined(TARGET_AARCH64)
{
int i;
if (!(arm_feature(env, ARM_FEATURE_AARCH64))) {
fprintf(stderr,
"The selected ARM CPU does not support 64 bit mode\n");
exit(1);
}
for (i = 0; i < 31; i++) {
env->xregs[i] = regs->regs[i];
}
env->pc = regs->pc;
env->xregs[31] = regs->sp;
}
#elif defined(TARGET_ARM)
{
int i;