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semihosting: Change internal common-semi interfaces to use CPUState * 

This makes all of the internal interfaces architecture-independent and
renames the internal functions to use the 'common_semi' prefix instead
of 'arm' or 'arm_semi'.

To do this, some new architecture-specific internal helper functions
were created:

    static inline target_ulong
    common_semi_arg(CPUState *cs, int argno)

	Returns the argno'th semihosting argument, where argno can be
	either 0 or 1.

    static inline void
    common_semi_set_ret(CPUState *cs, target_ulong ret)

	Sets the semihosting return value.

    static inline bool
    common_semi_sys_exit_extended(CPUState *cs, int nr)

	This detects whether the specified semihosting call, which
	is either TARGET_SYS_EXIT or TARGET_SYS_EXIT_EXTENDED should
	be executed using the TARGET_SYS_EXIT_EXTENDED semantics.

    static inline target_ulong
    common_semi_rambase(CPUState *cs)

	Returns the base of RAM region used for heap and stack. This
	is used to construct plausible values for the SYS_HEAPINFO
	call.

In addition, several existing functions have been changed to flag
areas of code which are architecture specific:

    static target_ulong
    common_semi_flen_buf(CPUState *cs)

	Returns the current stack pointer minus 64, which is
	where a stat structure will be placed on the stack

    #define GET_ARG(n)

	This fetches arguments from the semihosting command's argument
	block. The address of this is available implicitly through the
	local 'args' variable. This is *mostly* architecture
	independent, but does depend on the current ABI's notion of
	the size of a 'long' parameter, which may need run-time checks
	(as it does on AARCH64)

    #define SET_ARG(n, val)

	This mirrors GET_ARG and stores data back into the argument
	block.

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20210107170717.2098982-4-keithp@keithp.com>
Message-Id: <20210108224256.2321-15-alex.bennee@linaro.org>
This commit is contained in:
Keith Packard 2021-01-08 22:42:50 +00:00 committed by Alex Bennée
parent 0bb446d8b0
commit 3c37cfe0b1
1 changed files with 186 additions and 163 deletions
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349
hw/semihosting/arm-compat-semi.c
View File

@ -32,15 +32,18 @@
#include "cpu.h" #include "cpu.h"
#include "hw/semihosting/semihost.h" #include "hw/semihosting/semihost.h"
#include "hw/semihosting/console.h" #include "hw/semihosting/console.h"
#include "hw/semihosting/common-semi.h"
#include "qemu/log.h" #include "qemu/log.h"
#ifdef CONFIG_USER_ONLY #ifdef CONFIG_USER_ONLY
#include "qemu.h" #include "qemu.h"
#define ARM_ANGEL_HEAP_SIZE (128 * 1024 * 1024) #define COMMON_SEMI_HEAP_SIZE (128 * 1024 * 1024)
#else #else
#include "exec/gdbstub.h" #include "exec/gdbstub.h"
#include "qemu/cutils.h" #include "qemu/cutils.h"
#ifdef TARGET_ARM
#include "hw/arm/boot.h" #include "hw/arm/boot.h"
#endif
#include "hw/boards.h" #include "hw/boards.h"
#endif #endif
@ -134,6 +137,50 @@ typedef struct GuestFD {
static GArray *guestfd_array; static GArray *guestfd_array;
#ifdef TARGET_ARM
static inline target_ulong
common_semi_arg(CPUState *cs, int argno)
{
ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env;
if (is_a64(env)) {
return env->xregs[argno];
} else {
return env->regs[argno];
}
}
static inline void
common_semi_set_ret(CPUState *cs, target_ulong ret)
{
ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env;
if (is_a64(env)) {
env->xregs[0] = ret;
} else {
env->regs[0] = ret;
}
}
static inline bool
common_semi_sys_exit_extended(CPUState *cs, int nr)
{
return (nr == TARGET_SYS_EXIT_EXTENDED || is_a64(cs->env_ptr));
}
#ifndef CONFIG_USER_ONLY
#include "hw/arm/boot.h"
static inline target_ulong
common_semi_rambase(CPUState *cs)
{
CPUArchState *env = cs->env_ptr;
const struct arm_boot_info *info = env->boot_info;
return info->loader_start;
}
#endif
#endif /* TARGET_ARM */
/* /*
* Allocate a new guest file descriptor and return it; if we * Allocate a new guest file descriptor and return it; if we
* couldn't allocate a new fd then return -1. * couldn't allocate a new fd then return -1.
@ -239,11 +286,10 @@ static target_ulong syscall_err;
#include "exec/softmmu-semi.h" #include "exec/softmmu-semi.h"
#endif #endif
static inline uint32_t set_swi_errno(CPUARMState *env, uint32_t code) static inline uint32_t set_swi_errno(CPUState *cs, uint32_t code)
{ {
if (code == (uint32_t)-1) { if (code == (uint32_t)-1) {
#ifdef CONFIG_USER_ONLY #ifdef CONFIG_USER_ONLY
CPUState *cs = env_cpu(env);
TaskState *ts = cs->opaque; TaskState *ts = cs->opaque;
ts->swi_errno = errno; ts->swi_errno = errno;
@ -254,10 +300,9 @@ static inline uint32_t set_swi_errno(CPUARMState *env, uint32_t code)
return code; return code;
} }
static inline uint32_t get_swi_errno(CPUARMState *env) static inline uint32_t get_swi_errno(CPUState *cs)
{ {
#ifdef CONFIG_USER_ONLY #ifdef CONFIG_USER_ONLY
CPUState *cs = env_cpu(env);
TaskState *ts = cs->opaque; TaskState *ts = cs->opaque;
return ts->swi_errno; return ts->swi_errno;
@ -266,24 +311,22 @@ static inline uint32_t get_swi_errno(CPUARMState *env)
#endif #endif
} }
static target_ulong arm_semi_syscall_len; static target_ulong common_semi_syscall_len;
static void arm_semi_cb(CPUState *cs, target_ulong ret, target_ulong err) static void common_semi_cb(CPUState *cs, target_ulong ret, target_ulong err)
{ {
ARMCPU *cpu = ARM_CPU(cs); target_ulong reg0 = common_semi_arg(cs, 0);
CPUARMState *env = &cpu->env;
target_ulong reg0 = is_a64(env) ? env->xregs[0] : env->regs[0];
if (ret == (target_ulong)-1) { if (ret == (target_ulong)-1) {
errno = err; errno = err;
set_swi_errno(env, -1); set_swi_errno(cs, -1);
reg0 = ret; reg0 = ret;
} else { } else {
/* Fixup syscalls that use nonstardard return conventions. */ /* Fixup syscalls that use nonstardard return conventions. */
switch (reg0) { switch (reg0) {
case TARGET_SYS_WRITE: case TARGET_SYS_WRITE:
case TARGET_SYS_READ: case TARGET_SYS_READ:
reg0 = arm_semi_syscall_len - ret; reg0 = common_semi_syscall_len - ret;
break; break;
case TARGET_SYS_SEEK: case TARGET_SYS_SEEK:
reg0 = 0; reg0 = 0;
@ -293,77 +336,66 @@ static void arm_semi_cb(CPUState *cs, target_ulong ret, target_ulong err)
break; break;
} }
} }
if (is_a64(env)) { common_semi_set_ret(cs, reg0);
env->xregs[0] = reg0;
} else {
env->regs[0] = reg0;
}
} }
static target_ulong arm_flen_buf(ARMCPU *cpu) static target_ulong common_semi_flen_buf(CPUState *cs)
{ {
target_ulong sp;
#ifdef TARGET_ARM
/* Return an address in target memory of 64 bytes where the remote /* Return an address in target memory of 64 bytes where the remote
* gdb should write its stat struct. (The format of this structure * gdb should write its stat struct. (The format of this structure
* is defined by GDB's remote protocol and is not target-specific.) * is defined by GDB's remote protocol and is not target-specific.)
* We put this on the guest's stack just below SP. * We put this on the guest's stack just below SP.
*/ */
ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env; CPUARMState *env = &cpu->env;
target_ulong sp;
if (is_a64(env)) { if (is_a64(env)) {
sp = env->xregs[31]; sp = env->xregs[31];
} else { } else {
sp = env->regs[13]; sp = env->regs[13];
} }
#endif
return sp - 64; return sp - 64;
} }
static void arm_semi_flen_cb(CPUState *cs, target_ulong ret, target_ulong err) static void
common_semi_flen_cb(CPUState *cs, target_ulong ret, target_ulong err)
{ {
ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env;
/* The size is always stored in big-endian order, extract /* The size is always stored in big-endian order, extract
the value. We assume the size always fit in 32 bits. */ the value. We assume the size always fit in 32 bits. */
uint32_t size; uint32_t size;
cpu_memory_rw_debug(cs, arm_flen_buf(cpu) + 32, (uint8_t *)&size, 4, 0); cpu_memory_rw_debug(cs, common_semi_flen_buf(cs) + 32,
(uint8_t *)&size, 4, 0);
size = be32_to_cpu(size); size = be32_to_cpu(size);
if (is_a64(env)) { common_semi_set_ret(cs, size);
env->xregs[0] = size;
} else {
env->regs[0] = size;
}
errno = err; errno = err;
set_swi_errno(env, -1); set_swi_errno(cs, -1);
} }
static int arm_semi_open_guestfd; static int common_semi_open_guestfd;
static void arm_semi_open_cb(CPUState *cs, target_ulong ret, target_ulong err) static void
common_semi_open_cb(CPUState *cs, target_ulong ret, target_ulong err)
{ {
ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env;
if (ret == (target_ulong)-1) { if (ret == (target_ulong)-1) {
errno = err; errno = err;
set_swi_errno(env, -1); set_swi_errno(cs, -1);
dealloc_guestfd(arm_semi_open_guestfd); dealloc_guestfd(common_semi_open_guestfd);
} else { } else {
associate_guestfd(arm_semi_open_guestfd, ret); associate_guestfd(common_semi_open_guestfd, ret);
ret = arm_semi_open_guestfd; ret = common_semi_open_guestfd;
}
if (is_a64(env)) {
env->xregs[0] = ret;
} else {
env->regs[0] = ret;
} }
common_semi_set_ret(cs, ret);
} }
static target_ulong arm_gdb_syscall(ARMCPU *cpu, gdb_syscall_complete_cb cb, static target_ulong
const char *fmt, ...) common_semi_gdb_syscall(CPUState *cs, gdb_syscall_complete_cb cb,
const char *fmt, ...)
{ {
va_list va; va_list va;
CPUARMState *env = &cpu->env;
va_start(va, fmt); va_start(va, fmt);
gdb_do_syscallv(cb, fmt, va); gdb_do_syscallv(cb, fmt, va);
@ -386,7 +418,7 @@ static target_ulong arm_gdb_syscall(ARMCPU *cpu, gdb_syscall_complete_cb cb,
* doing something with the return value is not possible to make. * doing something with the return value is not possible to make.
*/ */
return is_a64(env) ? env->xregs[0] : env->regs[0]; return common_semi_arg(cs, 0);
} }
/* /*
@ -395,20 +427,18 @@ static target_ulong arm_gdb_syscall(ARMCPU *cpu, gdb_syscall_complete_cb cb,
* do the work and return the required return value for the guest, * do the work and return the required return value for the guest,
* setting the guest errno if appropriate. * setting the guest errno if appropriate.
*/ */
typedef uint32_t sys_closefn(ARMCPU *cpu, GuestFD *gf); typedef uint32_t sys_closefn(CPUState *cs, GuestFD *gf);
typedef uint32_t sys_writefn(ARMCPU *cpu, GuestFD *gf, typedef uint32_t sys_writefn(CPUState *cs, GuestFD *gf,
target_ulong buf, uint32_t len); target_ulong buf, uint32_t len);
typedef uint32_t sys_readfn(ARMCPU *cpu, GuestFD *gf, typedef uint32_t sys_readfn(CPUState *cs, GuestFD *gf,
target_ulong buf, uint32_t len); target_ulong buf, uint32_t len);
typedef uint32_t sys_isattyfn(ARMCPU *cpu, GuestFD *gf); typedef uint32_t sys_isattyfn(CPUState *cs, GuestFD *gf);
typedef uint32_t sys_seekfn(ARMCPU *cpu, GuestFD *gf, typedef uint32_t sys_seekfn(CPUState *cs, GuestFD *gf,
target_ulong offset); target_ulong offset);
typedef uint32_t sys_flenfn(ARMCPU *cpu, GuestFD *gf); typedef uint32_t sys_flenfn(CPUState *cs, GuestFD *gf);
static uint32_t host_closefn(ARMCPU *cpu, GuestFD *gf) static uint32_t host_closefn(CPUState *cs, GuestFD *gf)
{ {
CPUARMState *env = &cpu->env;
/* /*
* Only close the underlying host fd if it's one we opened on behalf * Only close the underlying host fd if it's one we opened on behalf
* of the guest in SYS_OPEN. * of the guest in SYS_OPEN.
@ -418,20 +448,21 @@ static uint32_t host_closefn(ARMCPU *cpu, GuestFD *gf)
gf->hostfd == STDERR_FILENO) { gf->hostfd == STDERR_FILENO) {
return 0; return 0;
} }
return set_swi_errno(env, close(gf->hostfd)); return set_swi_errno(cs, close(gf->hostfd));
} }
static uint32_t host_writefn(ARMCPU *cpu, GuestFD *gf, static uint32_t host_writefn(CPUState *cs, GuestFD *gf,
target_ulong buf, uint32_t len) target_ulong buf, uint32_t len)
{ {
CPUArchState *env = cs->env_ptr;
uint32_t ret; uint32_t ret;
CPUARMState *env = &cpu->env;
char *s = lock_user(VERIFY_READ, buf, len, 1); char *s = lock_user(VERIFY_READ, buf, len, 1);
(void) env; /* Used in arm softmmu lock_user implicitly */
if (!s) { if (!s) {
/* Return bytes not written on error */ /* Return bytes not written on error */
return len; return len;
} }
ret = set_swi_errno(env, write(gf->hostfd, s, len)); ret = set_swi_errno(cs, write(gf->hostfd, s, len));
unlock_user(s, buf, 0); unlock_user(s, buf, 0);
if (ret == (uint32_t)-1) { if (ret == (uint32_t)-1) {
ret = 0; ret = 0;
@ -440,18 +471,19 @@ static uint32_t host_writefn(ARMCPU *cpu, GuestFD *gf,
return len - ret; return len - ret;
} }
static uint32_t host_readfn(ARMCPU *cpu, GuestFD *gf, static uint32_t host_readfn(CPUState *cs, GuestFD *gf,
target_ulong buf, uint32_t len) target_ulong buf, uint32_t len)
{ {
CPUArchState *env = cs->env_ptr;
uint32_t ret; uint32_t ret;
CPUARMState *env = &cpu->env;
char *s = lock_user(VERIFY_WRITE, buf, len, 0); char *s = lock_user(VERIFY_WRITE, buf, len, 0);
(void) env; /* Used in arm softmmu lock_user implicitly */
if (!s) { if (!s) {
/* return bytes not read */ /* return bytes not read */
return len; return len;
} }
do { do {
ret = set_swi_errno(env, read(gf->hostfd, s, len)); ret = set_swi_errno(cs, read(gf->hostfd, s, len));
} while (ret == -1 && errno == EINTR); } while (ret == -1 && errno == EINTR);
unlock_user(s, buf, len); unlock_user(s, buf, len);
if (ret == (uint32_t)-1) { if (ret == (uint32_t)-1) {
@ -461,68 +493,66 @@ static uint32_t host_readfn(ARMCPU *cpu, GuestFD *gf,
return len - ret; return len - ret;
} }
static uint32_t host_isattyfn(ARMCPU *cpu, GuestFD *gf) static uint32_t host_isattyfn(CPUState *cs, GuestFD *gf)
{ {
return isatty(gf->hostfd); return isatty(gf->hostfd);
} }
static uint32_t host_seekfn(ARMCPU *cpu, GuestFD *gf, target_ulong offset) static uint32_t host_seekfn(CPUState *cs, GuestFD *gf, target_ulong offset)
{ {
CPUARMState *env = &cpu->env; uint32_t ret = set_swi_errno(cs, lseek(gf->hostfd, offset, SEEK_SET));
uint32_t ret = set_swi_errno(env, lseek(gf->hostfd, offset, SEEK_SET));
if (ret == (uint32_t)-1) { if (ret == (uint32_t)-1) {
return -1; return -1;
} }
return 0; return 0;
} }
static uint32_t host_flenfn(ARMCPU *cpu, GuestFD *gf) static uint32_t host_flenfn(CPUState *cs, GuestFD *gf)
{ {
CPUARMState *env = &cpu->env;
struct stat buf; struct stat buf;
uint32_t ret = set_swi_errno(env, fstat(gf->hostfd, &buf)); uint32_t ret = set_swi_errno(cs, fstat(gf->hostfd, &buf));
if (ret == (uint32_t)-1) { if (ret == (uint32_t)-1) {
return -1; return -1;
} }
return buf.st_size; return buf.st_size;
} }
static uint32_t gdb_closefn(ARMCPU *cpu, GuestFD *gf) static uint32_t gdb_closefn(CPUState *cs, GuestFD *gf)
{ {
return arm_gdb_syscall(cpu, arm_semi_cb, "close,%x", gf->hostfd); return common_semi_gdb_syscall(cs, common_semi_cb, "close,%x", gf->hostfd);
} }
static uint32_t gdb_writefn(ARMCPU *cpu, GuestFD *gf, static uint32_t gdb_writefn(CPUState *cs, GuestFD *gf,
target_ulong buf, uint32_t len) target_ulong buf, uint32_t len)
{ {
arm_semi_syscall_len = len; common_semi_syscall_len = len;
return arm_gdb_syscall(cpu, arm_semi_cb, "write,%x,%x,%x", return common_semi_gdb_syscall(cs, common_semi_cb, "write,%x,%x,%x",
gf->hostfd, buf, len); gf->hostfd, buf, len);
} }
static uint32_t gdb_readfn(ARMCPU *cpu, GuestFD *gf, static uint32_t gdb_readfn(CPUState *cs, GuestFD *gf,
target_ulong buf, uint32_t len) target_ulong buf, uint32_t len)
{ {
arm_semi_syscall_len = len; common_semi_syscall_len = len;
return arm_gdb_syscall(cpu, arm_semi_cb, "read,%x,%x,%x", return common_semi_gdb_syscall(cs, common_semi_cb, "read,%x,%x,%x",
gf->hostfd, buf, len); gf->hostfd, buf, len);
} }
static uint32_t gdb_isattyfn(ARMCPU *cpu, GuestFD *gf) static uint32_t gdb_isattyfn(CPUState *cs, GuestFD *gf)
{ {
return arm_gdb_syscall(cpu, arm_semi_cb, "isatty,%x", gf->hostfd); return common_semi_gdb_syscall(cs, common_semi_cb, "isatty,%x", gf->hostfd);
} }
static uint32_t gdb_seekfn(ARMCPU *cpu, GuestFD *gf, target_ulong offset) static uint32_t gdb_seekfn(CPUState *cs, GuestFD *gf, target_ulong offset)
{ {
return arm_gdb_syscall(cpu, arm_semi_cb, "lseek,%x,%x,0", return common_semi_gdb_syscall(cs, common_semi_cb, "lseek,%x,%x,0",
gf->hostfd, offset); gf->hostfd, offset);
} }
static uint32_t gdb_flenfn(ARMCPU *cpu, GuestFD *gf) static uint32_t gdb_flenfn(CPUState *cs, GuestFD *gf)
{ {
return arm_gdb_syscall(cpu, arm_semi_flen_cb, "fstat,%x,%x", return common_semi_gdb_syscall(cs, common_semi_flen_cb, "fstat,%x,%x",
gf->hostfd, arm_flen_buf(cpu)); gf->hostfd, common_semi_flen_buf(cs));
} }
#define SHFB_MAGIC_0 0x53 #define SHFB_MAGIC_0 0x53
@ -551,31 +581,29 @@ static void init_featurefile_guestfd(int guestfd)
gf->featurefile_offset = 0; gf->featurefile_offset = 0;
} }
static uint32_t featurefile_closefn(ARMCPU *cpu, GuestFD *gf) static uint32_t featurefile_closefn(CPUState *cs, GuestFD *gf)
{ {
/* Nothing to do */ /* Nothing to do */
return 0; return 0;
} }
static uint32_t featurefile_writefn(ARMCPU *cpu, GuestFD *gf, static uint32_t featurefile_writefn(CPUState *cs, GuestFD *gf,
target_ulong buf, uint32_t len) target_ulong buf, uint32_t len)
{ {
/* This fd can never be open for writing */ /* This fd can never be open for writing */
CPUARMState *env = &cpu->env;
errno = EBADF; errno = EBADF;
return set_swi_errno(env, -1); return set_swi_errno(cs, -1);
} }
static uint32_t featurefile_readfn(ARMCPU *cpu, GuestFD *gf, static uint32_t featurefile_readfn(CPUState *cs, GuestFD *gf,
target_ulong buf, uint32_t len) target_ulong buf, uint32_t len)
{ {
CPUArchState *env = cs->env_ptr;
uint32_t i; uint32_t i;
#ifndef CONFIG_USER_ONLY
CPUARMState *env = &cpu->env;
#endif
char *s; char *s;
(void) env; /* Used in arm softmmu lock_user implicitly */
s = lock_user(VERIFY_WRITE, buf, len, 0); s = lock_user(VERIFY_WRITE, buf, len, 0);
if (!s) { if (!s) {
return len; return len;
@ -595,19 +623,19 @@ static uint32_t featurefile_readfn(ARMCPU *cpu, GuestFD *gf,
return len - i; return len - i;
} }
static uint32_t featurefile_isattyfn(ARMCPU *cpu, GuestFD *gf) static uint32_t featurefile_isattyfn(CPUState *cs, GuestFD *gf)
{ {
return 0; return 0;
} }
static uint32_t featurefile_seekfn(ARMCPU *cpu, GuestFD *gf, static uint32_t featurefile_seekfn(CPUState *cs, GuestFD *gf,
target_ulong offset) target_ulong offset)
{ {
gf->featurefile_offset = offset; gf->featurefile_offset = offset;
return 0; return 0;
} }
static uint32_t featurefile_flenfn(ARMCPU *cpu, GuestFD *gf) static uint32_t featurefile_flenfn(CPUState *cs, GuestFD *gf)
{ {
return sizeof(featurefile_data); return sizeof(featurefile_data);
} }
@ -651,16 +679,17 @@ static const GuestFDFunctions guestfd_fns[] = {
/* Read the input value from the argument block; fail the semihosting /* Read the input value from the argument block; fail the semihosting
* call if the memory read fails. * call if the memory read fails.
*/ */
#ifdef TARGET_ARM
#define GET_ARG(n) do { \ #define GET_ARG(n) do { \
if (is_a64(env)) { \ if (is_a64(env)) { \
if (get_user_u64(arg ## n, args + (n) * 8)) { \ if (get_user_u64(arg ## n, args + (n) * 8)) { \
errno = EFAULT; \ errno = EFAULT; \
return set_swi_errno(env, -1); \ return set_swi_errno(cs, -1); \
} \ } \
} else { \ } else { \
if (get_user_u32(arg ## n, args + (n) * 4)) { \ if (get_user_u32(arg ## n, args + (n) * 4)) { \
errno = EFAULT; \ errno = EFAULT; \
return set_swi_errno(env, -1); \ return set_swi_errno(cs, -1); \
} \ } \
} \ } \
} while (0) } while (0)
@ -669,6 +698,7 @@ static const GuestFDFunctions guestfd_fns[] = {
(is_a64(env) ? \ (is_a64(env) ? \
put_user_u64(val, args + (n) * 8) : \ put_user_u64(val, args + (n) * 8) : \
put_user_u32(val, args + (n) * 4)) put_user_u32(val, args + (n) * 4))
#endif
/* /*
* Do a semihosting call. * Do a semihosting call.
@ -681,8 +711,7 @@ static const GuestFDFunctions guestfd_fns[] = {
*/ */
target_ulong do_common_semihosting(CPUState *cs) target_ulong do_common_semihosting(CPUState *cs)
{ {
ARMCPU *cpu = ARM_CPU(cs); CPUArchState *env = cs->env_ptr;
CPUARMState *env = &cpu->env;
target_ulong args; target_ulong args;
target_ulong arg0, arg1, arg2, arg3; target_ulong arg0, arg1, arg2, arg3;
char * s; char * s;
@ -691,14 +720,9 @@ target_ulong do_common_semihosting(CPUState *cs)
uint32_t len; uint32_t len;
GuestFD *gf; GuestFD *gf;
if (is_a64(env)) { (void) env; /* Used implicitly by arm lock_user macro */
/* Note that the syscall number is in W0, not X0 */ nr = common_semi_arg(cs, 0) & 0xffffffffU;
nr = env->xregs[0] & 0xffffffffU; args = common_semi_arg(cs, 1);
args = env->xregs[1];
} else {
nr = env->regs[0];
args = env->regs[1];
}
switch (nr) { switch (nr) {
case TARGET_SYS_OPEN: case TARGET_SYS_OPEN:
@ -711,19 +735,19 @@ target_ulong do_common_semihosting(CPUState *cs)
s = lock_user_string(arg0); s = lock_user_string(arg0);
if (!s) { if (!s) {
errno = EFAULT; errno = EFAULT;
return set_swi_errno(env, -1); return set_swi_errno(cs, -1);
} }
if (arg1 >= 12) { if (arg1 >= 12) {
unlock_user(s, arg0, 0); unlock_user(s, arg0, 0);
errno = EINVAL; errno = EINVAL;
return set_swi_errno(env, -1); return set_swi_errno(cs, -1);
} }
guestfd = alloc_guestfd(); guestfd = alloc_guestfd();
if (guestfd < 0) { if (guestfd < 0) {
unlock_user(s, arg0, 0); unlock_user(s, arg0, 0);
errno = EMFILE; errno = EMFILE;
return set_swi_errno(env, -1); return set_swi_errno(cs, -1);
} }
if (strcmp(s, ":tt") == 0) { if (strcmp(s, ":tt") == 0) {
@ -752,18 +776,19 @@ target_ulong do_common_semihosting(CPUState *cs)
if (arg1 != 0 && arg1 != 1) { if (arg1 != 0 && arg1 != 1) {
dealloc_guestfd(guestfd); dealloc_guestfd(guestfd);
errno = EACCES; errno = EACCES;
return set_swi_errno(env, -1); return set_swi_errno(cs, -1);
} }
init_featurefile_guestfd(guestfd); init_featurefile_guestfd(guestfd);
return guestfd; return guestfd;
} }
if (use_gdb_syscalls()) { if (use_gdb_syscalls()) {
arm_semi_open_guestfd = guestfd; common_semi_open_guestfd = guestfd;
ret = arm_gdb_syscall(cpu, arm_semi_open_cb, "open,%s,%x,1a4", arg0, ret = common_semi_gdb_syscall(cs, common_semi_open_cb,
(int)arg2 + 1, gdb_open_modeflags[arg1]); "open,%s,%x,1a4", arg0, (int)arg2 + 1,
gdb_open_modeflags[arg1]);
} else { } else {
ret = set_swi_errno(env, open(s, open_modeflags[arg1], 0644)); ret = set_swi_errno(cs, open(s, open_modeflags[arg1], 0644));
if (ret == (uint32_t)-1) { if (ret == (uint32_t)-1) {
dealloc_guestfd(guestfd); dealloc_guestfd(guestfd);
} else { } else {
@ -780,17 +805,17 @@ target_ulong do_common_semihosting(CPUState *cs)
gf = get_guestfd(arg0); gf = get_guestfd(arg0);
if (!gf) { if (!gf) {
errno = EBADF; errno = EBADF;
return set_swi_errno(env, -1); return set_swi_errno(cs, -1);
} }
ret = guestfd_fns[gf->type].closefn(cpu, gf); ret = guestfd_fns[gf->type].closefn(cs, gf);
dealloc_guestfd(arg0); dealloc_guestfd(arg0);
return ret; return ret;
case TARGET_SYS_WRITEC: case TARGET_SYS_WRITEC:
qemu_semihosting_console_outc(env, args); qemu_semihosting_console_outc(cs->env_ptr, args);
return 0xdeadbeef; return 0xdeadbeef;
case TARGET_SYS_WRITE0: case TARGET_SYS_WRITE0:
return qemu_semihosting_console_outs(env, args); return qemu_semihosting_console_outs(cs->env_ptr, args);
case TARGET_SYS_WRITE: case TARGET_SYS_WRITE:
GET_ARG(0); GET_ARG(0);
GET_ARG(1); GET_ARG(1);
@ -800,10 +825,10 @@ target_ulong do_common_semihosting(CPUState *cs)
gf = get_guestfd(arg0); gf = get_guestfd(arg0);
if (!gf) { if (!gf) {
errno = EBADF; errno = EBADF;
return set_swi_errno(env, -1); return set_swi_errno(cs, -1);
} }
return guestfd_fns[gf->type].writefn(cpu, gf, arg1, len); return guestfd_fns[gf->type].writefn(cs, gf, arg1, len);
case TARGET_SYS_READ: case TARGET_SYS_READ:
GET_ARG(0); GET_ARG(0);
GET_ARG(1); GET_ARG(1);
@ -813,22 +838,22 @@ target_ulong do_common_semihosting(CPUState *cs)
gf = get_guestfd(arg0); gf = get_guestfd(arg0);
if (!gf) { if (!gf) {
errno = EBADF; errno = EBADF;
return set_swi_errno(env, -1); return set_swi_errno(cs, -1);
} }
return guestfd_fns[gf->type].readfn(cpu, gf, arg1, len); return guestfd_fns[gf->type].readfn(cs, gf, arg1, len);
case TARGET_SYS_READC: case TARGET_SYS_READC:
return qemu_semihosting_console_inc(env); return qemu_semihosting_console_inc(cs->env_ptr);
case TARGET_SYS_ISTTY: case TARGET_SYS_ISTTY:
GET_ARG(0); GET_ARG(0);
gf = get_guestfd(arg0); gf = get_guestfd(arg0);
if (!gf) { if (!gf) {
errno = EBADF; errno = EBADF;
return set_swi_errno(env, -1); return set_swi_errno(cs, -1);
} }
return guestfd_fns[gf->type].isattyfn(cpu, gf); return guestfd_fns[gf->type].isattyfn(cs, gf);
case TARGET_SYS_SEEK: case TARGET_SYS_SEEK:
GET_ARG(0); GET_ARG(0);
GET_ARG(1); GET_ARG(1);
@ -836,20 +861,20 @@ target_ulong do_common_semihosting(CPUState *cs)
gf = get_guestfd(arg0); gf = get_guestfd(arg0);
if (!gf) { if (!gf) {
errno = EBADF; errno = EBADF;
return set_swi_errno(env, -1); return set_swi_errno(cs, -1);
} }
return guestfd_fns[gf->type].seekfn(cpu, gf, arg1); return guestfd_fns[gf->type].seekfn(cs, gf, arg1);
case TARGET_SYS_FLEN: case TARGET_SYS_FLEN:
GET_ARG(0); GET_ARG(0);
gf = get_guestfd(arg0); gf = get_guestfd(arg0);
if (!gf) { if (!gf) {
errno = EBADF; errno = EBADF;
return set_swi_errno(env, -1); return set_swi_errno(cs, -1);
} }
return guestfd_fns[gf->type].flenfn(cpu, gf); return guestfd_fns[gf->type].flenfn(cs, gf);
case TARGET_SYS_TMPNAM: case TARGET_SYS_TMPNAM:
qemu_log_mask(LOG_UNIMP, "%s: SYS_TMPNAM not implemented", __func__); qemu_log_mask(LOG_UNIMP, "%s: SYS_TMPNAM not implemented", __func__);
return -1; return -1;
@ -857,15 +882,15 @@ target_ulong do_common_semihosting(CPUState *cs)
GET_ARG(0); GET_ARG(0);
GET_ARG(1); GET_ARG(1);
if (use_gdb_syscalls()) { if (use_gdb_syscalls()) {
ret = arm_gdb_syscall(cpu, arm_semi_cb, "unlink,%s", ret = common_semi_gdb_syscall(cs, common_semi_cb, "unlink,%s",
arg0, (int)arg1 + 1); arg0, (int)arg1 + 1);
} else { } else {
s = lock_user_string(arg0); s = lock_user_string(arg0);
if (!s) { if (!s) {
errno = EFAULT; errno = EFAULT;
return set_swi_errno(env, -1); return set_swi_errno(cs, -1);
} }
ret = set_swi_errno(env, remove(s)); ret = set_swi_errno(cs, remove(s));
unlock_user(s, arg0, 0); unlock_user(s, arg0, 0);
} }
return ret; return ret;
@ -875,17 +900,18 @@ target_ulong do_common_semihosting(CPUState *cs)
GET_ARG(2); GET_ARG(2);
GET_ARG(3); GET_ARG(3);
if (use_gdb_syscalls()) { if (use_gdb_syscalls()) {
return arm_gdb_syscall(cpu, arm_semi_cb, "rename,%s,%s", return common_semi_gdb_syscall(cs, common_semi_cb, "rename,%s,%s",
arg0, (int)arg1 + 1, arg2, (int)arg3 + 1); arg0, (int)arg1 + 1, arg2,
(int)arg3 + 1);
} else { } else {
char *s2; char *s2;
s = lock_user_string(arg0); s = lock_user_string(arg0);
s2 = lock_user_string(arg2); s2 = lock_user_string(arg2);
if (!s || !s2) { if (!s || !s2) {
errno = EFAULT; errno = EFAULT;
ret = set_swi_errno(env, -1); ret = set_swi_errno(cs, -1);
} else { } else {
ret = set_swi_errno(env, rename(s, s2)); ret = set_swi_errno(cs, rename(s, s2));
} }
if (s2) if (s2)
unlock_user(s2, arg2, 0); unlock_user(s2, arg2, 0);
@ -896,25 +922,25 @@ target_ulong do_common_semihosting(CPUState *cs)
case TARGET_SYS_CLOCK: case TARGET_SYS_CLOCK:
return clock() / (CLOCKS_PER_SEC / 100); return clock() / (CLOCKS_PER_SEC / 100);
case TARGET_SYS_TIME: case TARGET_SYS_TIME:
return set_swi_errno(env, time(NULL)); return set_swi_errno(cs, time(NULL));
case TARGET_SYS_SYSTEM: case TARGET_SYS_SYSTEM:
GET_ARG(0); GET_ARG(0);
GET_ARG(1); GET_ARG(1);
if (use_gdb_syscalls()) { if (use_gdb_syscalls()) {
return arm_gdb_syscall(cpu, arm_semi_cb, "system,%s", return common_semi_gdb_syscall(cs, common_semi_cb, "system,%s",
arg0, (int)arg1 + 1); arg0, (int)arg1 + 1);
} else { } else {
s = lock_user_string(arg0); s = lock_user_string(arg0);
if (!s) { if (!s) {
errno = EFAULT; errno = EFAULT;
return set_swi_errno(env, -1); return set_swi_errno(cs, -1);
} }
ret = set_swi_errno(env, system(s)); ret = set_swi_errno(cs, system(s));
unlock_user(s, arg0, 0); unlock_user(s, arg0, 0);
return ret; return ret;
} }
case TARGET_SYS_ERRNO: case TARGET_SYS_ERRNO:
return get_swi_errno(env); return get_swi_errno(cs);
case TARGET_SYS_GET_CMDLINE: case TARGET_SYS_GET_CMDLINE:
{ {
/* Build a command-line from the original argv. /* Build a command-line from the original argv.
@ -966,21 +992,21 @@ target_ulong do_common_semihosting(CPUState *cs)
if (output_size > input_size) { if (output_size > input_size) {
/* Not enough space to store command-line arguments. */ /* Not enough space to store command-line arguments. */
errno = E2BIG; errno = E2BIG;
return set_swi_errno(env, -1); return set_swi_errno(cs, -1);
} }
/* Adjust the command-line length. */ /* Adjust the command-line length. */
if (SET_ARG(1, output_size - 1)) { if (SET_ARG(1, output_size - 1)) {
/* Couldn't write back to argument block */ /* Couldn't write back to argument block */
errno = EFAULT; errno = EFAULT;
return set_swi_errno(env, -1); return set_swi_errno(cs, -1);
} }
/* Lock the buffer on the ARM side. */ /* Lock the buffer on the ARM side. */
output_buffer = lock_user(VERIFY_WRITE, arg0, output_size, 0); output_buffer = lock_user(VERIFY_WRITE, arg0, output_size, 0);
if (!output_buffer) { if (!output_buffer) {
errno = EFAULT; errno = EFAULT;
return set_swi_errno(env, -1); return set_swi_errno(cs, -1);
} }
/* Copy the command-line arguments. */ /* Copy the command-line arguments. */
@ -996,7 +1022,7 @@ target_ulong do_common_semihosting(CPUState *cs)
if (copy_from_user(output_buffer, ts->info->arg_start, if (copy_from_user(output_buffer, ts->info->arg_start,
output_size)) { output_size)) {
errno = EFAULT; errno = EFAULT;
status = set_swi_errno(env, -1); status = set_swi_errno(cs, -1);
goto out; goto out;
} }
@ -1021,8 +1047,7 @@ target_ulong do_common_semihosting(CPUState *cs)
#ifdef CONFIG_USER_ONLY #ifdef CONFIG_USER_ONLY
TaskState *ts = cs->opaque; TaskState *ts = cs->opaque;
#else #else
const struct arm_boot_info *info = env->boot_info; target_ulong rambase = common_semi_rambase(cs);
target_ulong rambase = info->loader_start;
#endif #endif
GET_ARG(0); GET_ARG(0);
@ -1036,7 +1061,7 @@ target_ulong do_common_semihosting(CPUState *cs)
abi_ulong ret; abi_ulong ret;
ts->heap_base = do_brk(0); ts->heap_base = do_brk(0);
limit = ts->heap_base + ARM_ANGEL_HEAP_SIZE; limit = ts->heap_base + COMMON_SEMI_HEAP_SIZE;
/* Try a big heap, and reduce the size if that fails. */ /* Try a big heap, and reduce the size if that fails. */
for (;;) { for (;;) {
ret = do_brk(limit); ret = do_brk(limit);
@ -1064,23 +1089,19 @@ target_ulong do_common_semihosting(CPUState *cs)
for (i = 0; i < ARRAY_SIZE(retvals); i++) { for (i = 0; i < ARRAY_SIZE(retvals); i++) {
bool fail; bool fail;
if (is_a64(env)) { fail = SET_ARG(i, retvals[i]);
fail = put_user_u64(retvals[i], arg0 + i * 8);
} else {
fail = put_user_u32(retvals[i], arg0 + i * 4);
}
if (fail) { if (fail) {
/* Couldn't write back to argument block */ /* Couldn't write back to argument block */
errno = EFAULT; errno = EFAULT;
return set_swi_errno(env, -1); return set_swi_errno(cs, -1);
} }
} }
return 0; return 0;
} }
case TARGET_SYS_EXIT: case TARGET_SYS_EXIT:
case TARGET_SYS_EXIT_EXTENDED: case TARGET_SYS_EXIT_EXTENDED:
if (nr == TARGET_SYS_EXIT_EXTENDED || is_a64(env)) { if (common_semi_sys_exit_extended(cs, nr)) {
/* /*
* The A64 version of SYS_EXIT takes a parameter block, * The A64 version of SYS_EXIT takes a parameter block,
* so the application-exit type can return a subcode which * so the application-exit type can return a subcode which
@ -1113,9 +1134,11 @@ target_ulong do_common_semihosting(CPUState *cs)
* virtual address range. This is a nop for us since we don't * virtual address range. This is a nop for us since we don't
* implement caches. This is only present on A64. * implement caches. This is only present on A64.
*/ */
if (is_a64(env)) { #ifdef TARGET_ARM
if (is_a64(cs->env_ptr)) {
return 0; return 0;
} }
#endif
/* fall through -- invalid for A32/T32 */ /* fall through -- invalid for A32/T32 */
default: default:
fprintf(stderr, "qemu: Unsupported SemiHosting SWI 0x%02x\n", nr); fprintf(stderr, "qemu: Unsupported SemiHosting SWI 0x%02x\n", nr);