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[PATCH 3/9] semihosting: Change internal common-semi interfaces to use C
|
From: |
Keith Packard |
|
Subject: |
[PATCH 3/9] semihosting: Change internal common-semi interfaces to use CPUState * |
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Date: |
Thu, 7 Jan 2021 09:07:11 -0800 |
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>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
----
v2:
Add common_semi_rambase hook to get memory address for
SYS_HEAPINFO call.
Message-Id: <20201214200713.3886611-4-keithp@keithp.com>
---
hw/semihosting/common-semi.c | 351 +++++++++++++++++++----------------
1 file changed, 187 insertions(+), 164 deletions(-)
diff --git a/hw/semihosting/common-semi.c b/hw/semihosting/common-semi.c
index 74f09c038c..33c82f73b1 100644
--- a/hw/semihosting/common-semi.c
+++ b/hw/semihosting/common-semi.c
@@ -32,15 +32,18 @@
#include "cpu.h"
#include "hw/semihosting/semihost.h"
#include "hw/semihosting/console.h"
+#include "hw/semihosting/common-semi.h"
#include "qemu/log.h"
#ifdef CONFIG_USER_ONLY
#include "qemu.h"
-#define ARM_ANGEL_HEAP_SIZE (128 * 1024 * 1024)
+#define COMMON_SEMI_HEAP_SIZE (128 * 1024 * 1024)
#else
#include "exec/gdbstub.h"
#include "qemu/cutils.h"
+#ifdef TARGET_ARM
#include "hw/arm/boot.h"
+#endif
#include "hw/boards.h"
#endif
@@ -134,6 +137,50 @@ typedef struct GuestFD {
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
* couldn't allocate a new fd then return -1.
@@ -239,11 +286,10 @@ static target_ulong syscall_err;
#include "exec/softmmu-semi.h"
#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) {
#ifdef CONFIG_USER_ONLY
- CPUState *cs = env_cpu(env);
TaskState *ts = cs->opaque;
ts->swi_errno = errno;
@@ -254,10 +300,9 @@ static inline uint32_t set_swi_errno(CPUARMState *env,
uint32_t 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
- CPUState *cs = env_cpu(env);
TaskState *ts = cs->opaque;
return ts->swi_errno;
@@ -266,24 +311,22 @@ static inline uint32_t get_swi_errno(CPUARMState *env)
#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);
- CPUARMState *env = &cpu->env;
- target_ulong reg0 = is_a64(env) ? env->xregs[0] : env->regs[0];
+ target_ulong reg0 = common_semi_arg(cs, 0);
if (ret == (target_ulong)-1) {
errno = err;
- set_swi_errno(env, -1);
+ set_swi_errno(cs, -1);
reg0 = ret;
} else {
/* Fixup syscalls that use nonstardard return conventions. */
switch (reg0) {
case TARGET_SYS_WRITE:
case TARGET_SYS_READ:
- reg0 = arm_semi_syscall_len - ret;
+ reg0 = common_semi_syscall_len - ret;
break;
case TARGET_SYS_SEEK:
reg0 = 0;
@@ -293,77 +336,66 @@ static void arm_semi_cb(CPUState *cs, target_ulong ret,
target_ulong err)
break;
}
}
- if (is_a64(env)) {
- env->xregs[0] = reg0;
- } else {
- env->regs[0] = reg0;
- }
+ common_semi_set_ret(cs, 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
* gdb should write its stat struct. (The format of this structure
* is defined by GDB's remote protocol and is not target-specific.)
* We put this on the guest's stack just below SP.
*/
+ ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env;
- target_ulong sp;
if (is_a64(env)) {
sp = env->xregs[31];
} else {
sp = env->regs[13];
}
+#endif
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 value. We assume the size always fit in 32 bits. */
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);
- if (is_a64(env)) {
- env->xregs[0] = size;
- } else {
- env->regs[0] = size;
- }
+ common_semi_set_ret(cs, size);
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) {
errno = err;
- set_swi_errno(env, -1);
- dealloc_guestfd(arm_semi_open_guestfd);
+ set_swi_errno(cs, -1);
+ dealloc_guestfd(common_semi_open_guestfd);
} else {
- associate_guestfd(arm_semi_open_guestfd, ret);
- ret = arm_semi_open_guestfd;
- }
-
- if (is_a64(env)) {
- env->xregs[0] = ret;
- } else {
- env->regs[0] = ret;
+ associate_guestfd(common_semi_open_guestfd, ret);
+ ret = common_semi_open_guestfd;
}
+ common_semi_set_ret(cs, ret);
}
-static target_ulong arm_gdb_syscall(ARMCPU *cpu, gdb_syscall_complete_cb cb,
- const char *fmt, ...)
+static target_ulong
+common_semi_gdb_syscall(CPUState *cs, gdb_syscall_complete_cb cb,
+ const char *fmt, ...)
{
va_list va;
- CPUARMState *env = &cpu->env;
va_start(va, fmt);
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.
*/
- 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,
* setting the guest errno if appropriate.
*/
-typedef uint32_t sys_closefn(ARMCPU *cpu, GuestFD *gf);
-typedef uint32_t sys_writefn(ARMCPU *cpu, GuestFD *gf,
+typedef uint32_t sys_closefn(CPUState *cs, GuestFD *gf);
+typedef uint32_t sys_writefn(CPUState *cs, GuestFD *gf,
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);
-typedef uint32_t sys_isattyfn(ARMCPU *cpu, GuestFD *gf);
-typedef uint32_t sys_seekfn(ARMCPU *cpu, GuestFD *gf,
+typedef uint32_t sys_isattyfn(CPUState *cs, GuestFD *gf);
+typedef uint32_t sys_seekfn(CPUState *cs, GuestFD *gf,
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
* of the guest in SYS_OPEN.
@@ -418,20 +448,21 @@ static uint32_t host_closefn(ARMCPU *cpu, GuestFD *gf)
gf->hostfd == STDERR_FILENO) {
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)
{
+ CPUArchState *env = cs->env_ptr;
uint32_t ret;
- CPUARMState *env = &cpu->env;
char *s = lock_user(VERIFY_READ, buf, len, 1);
+ (void) env; /* Used in arm softmmu lock_user implicitly */
if (!s) {
/* Return bytes not written on error */
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);
if (ret == (uint32_t)-1) {
ret = 0;
@@ -440,18 +471,19 @@ static uint32_t host_writefn(ARMCPU *cpu, GuestFD *gf,
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)
{
+ CPUArchState *env = cs->env_ptr;
uint32_t ret;
- CPUARMState *env = &cpu->env;
char *s = lock_user(VERIFY_WRITE, buf, len, 0);
+ (void) env; /* Used in arm softmmu lock_user implicitly */
if (!s) {
/* return bytes not read */
return len;
}
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);
unlock_user(s, buf, len);
if (ret == (uint32_t)-1) {
@@ -461,68 +493,66 @@ static uint32_t host_readfn(ARMCPU *cpu, GuestFD *gf,
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);
}
-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(env, lseek(gf->hostfd, offset, SEEK_SET));
+ uint32_t ret = set_swi_errno(cs, lseek(gf->hostfd, offset, SEEK_SET));
if (ret == (uint32_t)-1) {
return -1;
}
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;
- 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) {
return -1;
}
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)
{
- arm_semi_syscall_len = len;
- return arm_gdb_syscall(cpu, arm_semi_cb, "write,%x,%x,%x",
- gf->hostfd, buf, len);
+ common_semi_syscall_len = len;
+ return common_semi_gdb_syscall(cs, common_semi_cb, "write,%x,%x,%x",
+ 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)
{
- arm_semi_syscall_len = len;
- return arm_gdb_syscall(cpu, arm_semi_cb, "read,%x,%x,%x",
- gf->hostfd, buf, len);
+ common_semi_syscall_len = len;
+ return common_semi_gdb_syscall(cs, common_semi_cb, "read,%x,%x,%x",
+ 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",
- gf->hostfd, offset);
+ return common_semi_gdb_syscall(cs, common_semi_cb, "lseek,%x,%x,0",
+ 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",
- gf->hostfd, arm_flen_buf(cpu));
+ return common_semi_gdb_syscall(cs, common_semi_flen_cb, "fstat,%x,%x",
+ gf->hostfd, common_semi_flen_buf(cs));
}
#define SHFB_MAGIC_0 0x53
@@ -551,31 +581,29 @@ static void init_featurefile_guestfd(int guestfd)
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 */
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)
{
/* This fd can never be open for writing */
- CPUARMState *env = &cpu->env;
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)
{
+ CPUArchState *env = cs->env_ptr;
uint32_t i;
-#ifndef CONFIG_USER_ONLY
- CPUARMState *env = &cpu->env;
-#endif
char *s;
+ (void) env; /* Used in arm softmmu lock_user implicitly */
s = lock_user(VERIFY_WRITE, buf, len, 0);
if (!s) {
return len;
@@ -595,19 +623,19 @@ static uint32_t featurefile_readfn(ARMCPU *cpu, GuestFD
*gf,
return len - i;
}
-static uint32_t featurefile_isattyfn(ARMCPU *cpu, GuestFD *gf)
+static uint32_t featurefile_isattyfn(CPUState *cs, GuestFD *gf)
{
return 0;
}
-static uint32_t featurefile_seekfn(ARMCPU *cpu, GuestFD *gf,
+static uint32_t featurefile_seekfn(CPUState *cs, GuestFD *gf,
target_ulong offset)
{
gf->featurefile_offset = offset;
return 0;
}
-static uint32_t featurefile_flenfn(ARMCPU *cpu, GuestFD *gf)
+static uint32_t featurefile_flenfn(CPUState *cs, GuestFD *gf)
{
return sizeof(featurefile_data);
}
@@ -651,16 +679,17 @@ static const GuestFDFunctions guestfd_fns[] = {
/* Read the input value from the argument block; fail the semihosting
* call if the memory read fails.
*/
+#ifdef TARGET_ARM
#define GET_ARG(n) do { \
if (is_a64(env)) { \
if (get_user_u64(arg ## n, args + (n) * 8)) { \
errno = EFAULT; \
- return set_swi_errno(env, -1); \
+ return set_swi_errno(cs, -1); \
} \
} else { \
if (get_user_u32(arg ## n, args + (n) * 4)) { \
errno = EFAULT; \
- return set_swi_errno(env, -1); \
+ return set_swi_errno(cs, -1); \
} \
} \
} while (0)
@@ -669,6 +698,7 @@ static const GuestFDFunctions guestfd_fns[] = {
(is_a64(env) ? \
put_user_u64(val, args + (n) * 8) : \
put_user_u32(val, args + (n) * 4))
+#endif
/*
* Do a semihosting call.
@@ -681,8 +711,7 @@ static const GuestFDFunctions guestfd_fns[] = {
*/
target_ulong do_common_semihosting(CPUState *cs)
{
- ARMCPU *cpu = ARM_CPU(cs);
- CPUARMState *env = &cpu->env;
+ CPUArchState *env = cs->env_ptr;
target_ulong args;
target_ulong arg0, arg1, arg2, arg3;
char * s;
@@ -691,14 +720,9 @@ target_ulong do_common_semihosting(CPUState *cs)
uint32_t len;
GuestFD *gf;
- if (is_a64(env)) {
- /* Note that the syscall number is in W0, not X0 */
- nr = env->xregs[0] & 0xffffffffU;
- args = env->xregs[1];
- } else {
- nr = env->regs[0];
- args = env->regs[1];
- }
+ (void) env; /* Used implicitly by arm lock_user macro */
+ nr = common_semi_arg(cs, 0) & 0xffffffffU;
+ args = common_semi_arg(cs, 1);
switch (nr) {
case TARGET_SYS_OPEN:
@@ -711,19 +735,19 @@ target_ulong do_common_semihosting(CPUState *cs)
s = lock_user_string(arg0);
if (!s) {
errno = EFAULT;
- return set_swi_errno(env, -1);
+ return set_swi_errno(cs, -1);
}
if (arg1 >= 12) {
unlock_user(s, arg0, 0);
errno = EINVAL;
- return set_swi_errno(env, -1);
+ return set_swi_errno(cs, -1);
}
guestfd = alloc_guestfd();
if (guestfd < 0) {
unlock_user(s, arg0, 0);
errno = EMFILE;
- return set_swi_errno(env, -1);
+ return set_swi_errno(cs, -1);
}
if (strcmp(s, ":tt") == 0) {
@@ -752,18 +776,19 @@ target_ulong do_common_semihosting(CPUState *cs)
if (arg1 != 0 && arg1 != 1) {
dealloc_guestfd(guestfd);
errno = EACCES;
- return set_swi_errno(env, -1);
+ return set_swi_errno(cs, -1);
}
init_featurefile_guestfd(guestfd);
return guestfd;
}
if (use_gdb_syscalls()) {
- arm_semi_open_guestfd = guestfd;
- ret = arm_gdb_syscall(cpu, arm_semi_open_cb, "open,%s,%x,1a4",
arg0,
- (int)arg2 + 1, gdb_open_modeflags[arg1]);
+ common_semi_open_guestfd = guestfd;
+ ret = common_semi_gdb_syscall(cs, common_semi_open_cb,
+ "open,%s,%x,1a4", arg0, (int)arg2 +
1,
+ gdb_open_modeflags[arg1]);
} 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) {
dealloc_guestfd(guestfd);
} else {
@@ -780,17 +805,17 @@ target_ulong do_common_semihosting(CPUState *cs)
gf = get_guestfd(arg0);
if (!gf) {
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);
return ret;
case TARGET_SYS_WRITEC:
- qemu_semihosting_console_outc(env, args);
+ qemu_semihosting_console_outc(cs->env_ptr, args);
return 0xdeadbeef;
case TARGET_SYS_WRITE0:
- return qemu_semihosting_console_outs(env, args);
+ return qemu_semihosting_console_outs(cs->env_ptr, args);
case TARGET_SYS_WRITE:
GET_ARG(0);
GET_ARG(1);
@@ -800,10 +825,10 @@ target_ulong do_common_semihosting(CPUState *cs)
gf = get_guestfd(arg0);
if (!gf) {
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:
GET_ARG(0);
GET_ARG(1);
@@ -813,22 +838,22 @@ target_ulong do_common_semihosting(CPUState *cs)
gf = get_guestfd(arg0);
if (!gf) {
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:
- return qemu_semihosting_console_inc(env);
+ return qemu_semihosting_console_inc(cs->env_ptr);
case TARGET_SYS_ISTTY:
GET_ARG(0);
gf = get_guestfd(arg0);
if (!gf) {
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:
GET_ARG(0);
GET_ARG(1);
@@ -836,20 +861,20 @@ target_ulong do_common_semihosting(CPUState *cs)
gf = get_guestfd(arg0);
if (!gf) {
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:
GET_ARG(0);
gf = get_guestfd(arg0);
if (!gf) {
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:
qemu_log_mask(LOG_UNIMP, "%s: SYS_TMPNAM not implemented", __func__);
return -1;
@@ -857,15 +882,15 @@ target_ulong do_common_semihosting(CPUState *cs)
GET_ARG(0);
GET_ARG(1);
if (use_gdb_syscalls()) {
- ret = arm_gdb_syscall(cpu, arm_semi_cb, "unlink,%s",
- arg0, (int)arg1 + 1);
+ ret = common_semi_gdb_syscall(cs, common_semi_cb, "unlink,%s",
+ arg0, (int)arg1 + 1);
} else {
s = lock_user_string(arg0);
if (!s) {
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);
}
return ret;
@@ -875,17 +900,18 @@ target_ulong do_common_semihosting(CPUState *cs)
GET_ARG(2);
GET_ARG(3);
if (use_gdb_syscalls()) {
- return arm_gdb_syscall(cpu, arm_semi_cb, "rename,%s,%s",
- arg0, (int)arg1 + 1, arg2, (int)arg3 + 1);
+ return common_semi_gdb_syscall(cs, common_semi_cb, "rename,%s,%s",
+ arg0, (int)arg1 + 1, arg2,
+ (int)arg3 + 1);
} else {
char *s2;
s = lock_user_string(arg0);
s2 = lock_user_string(arg2);
if (!s || !s2) {
errno = EFAULT;
- ret = set_swi_errno(env, -1);
+ ret = set_swi_errno(cs, -1);
} else {
- ret = set_swi_errno(env, rename(s, s2));
+ ret = set_swi_errno(cs, rename(s, s2));
}
if (s2)
unlock_user(s2, arg2, 0);
@@ -896,25 +922,25 @@ target_ulong do_common_semihosting(CPUState *cs)
case TARGET_SYS_CLOCK:
return clock() / (CLOCKS_PER_SEC / 100);
case TARGET_SYS_TIME:
- return set_swi_errno(env, time(NULL));
+ return set_swi_errno(cs, time(NULL));
case TARGET_SYS_SYSTEM:
GET_ARG(0);
GET_ARG(1);
if (use_gdb_syscalls()) {
- return arm_gdb_syscall(cpu, arm_semi_cb, "system,%s",
- arg0, (int)arg1 + 1);
+ return common_semi_gdb_syscall(cs, common_semi_cb, "system,%s",
+ arg0, (int)arg1 + 1);
} else {
s = lock_user_string(arg0);
if (!s) {
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);
return ret;
}
case TARGET_SYS_ERRNO:
- return get_swi_errno(env);
+ return get_swi_errno(cs);
case TARGET_SYS_GET_CMDLINE:
{
/* Build a command-line from the original argv.
@@ -966,21 +992,21 @@ target_ulong do_common_semihosting(CPUState *cs)
if (output_size > input_size) {
/* Not enough space to store command-line arguments. */
errno = E2BIG;
- return set_swi_errno(env, -1);
+ return set_swi_errno(cs, -1);
}
/* Adjust the command-line length. */
if (SET_ARG(1, output_size - 1)) {
/* Couldn't write back to argument block */
errno = EFAULT;
- return set_swi_errno(env, -1);
+ return set_swi_errno(cs, -1);
}
/* Lock the buffer on the ARM side. */
output_buffer = lock_user(VERIFY_WRITE, arg0, output_size, 0);
if (!output_buffer) {
errno = EFAULT;
- return set_swi_errno(env, -1);
+ return set_swi_errno(cs, -1);
}
/* 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,
output_size)) {
errno = EFAULT;
- status = set_swi_errno(env, -1);
+ status = set_swi_errno(cs, -1);
goto out;
}
@@ -1021,8 +1047,7 @@ target_ulong do_common_semihosting(CPUState *cs)
#ifdef CONFIG_USER_ONLY
TaskState *ts = cs->opaque;
#else
- const struct arm_boot_info *info = env->boot_info;
- target_ulong rambase = info->loader_start;
+ target_ulong rambase = common_semi_rambase(cs);
#endif
GET_ARG(0);
@@ -1036,7 +1061,7 @@ target_ulong do_common_semihosting(CPUState *cs)
abi_ulong ret;
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. */
for (;;) {
ret = do_brk(limit);
@@ -1064,23 +1089,19 @@ target_ulong do_common_semihosting(CPUState *cs)
for (i = 0; i < ARRAY_SIZE(retvals); i++) {
bool fail;
- if (is_a64(env)) {
- fail = put_user_u64(retvals[i], arg0 + i * 8);
- } else {
- fail = put_user_u32(retvals[i], arg0 + i * 4);
- }
+ fail = SET_ARG(i, retvals[i]);
if (fail) {
/* Couldn't write back to argument block */
errno = EFAULT;
- return set_swi_errno(env, -1);
+ return set_swi_errno(cs, -1);
}
}
return 0;
}
case TARGET_SYS_EXIT:
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,
* so the application-exit type can return a subcode which
@@ -1105,7 +1126,7 @@ target_ulong do_common_semihosting(CPUState *cs)
*/
ret = (args == ADP_Stopped_ApplicationExit) ? 0 : 1;
}
- gdb_exit(env, ret);
+ gdb_exit(cs->env_ptr, ret);
exit(ret);
case TARGET_SYS_SYNCCACHE:
/*
@@ -1113,9 +1134,11 @@ target_ulong do_common_semihosting(CPUState *cs)
* virtual address range. This is a nop for us since we don't
* implement caches. This is only present on A64.
*/
- if (is_a64(env)) {
+#ifdef TARGET_ARM
+ if (is_a64(cs->env_ptr)) {
return 0;
}
+#endif
/* fall through -- invalid for A32/T32 */
default:
fprintf(stderr, "qemu: Unsupported SemiHosting SWI 0x%02x\n", nr);
--
2.29.2
- [PATCH 0/9] Add RISC-V semihosting 0.2. Finish ARM semihosting 2.0, Keith Packard, 2021/01/07
- [PATCH 5/9] riscv: Add semihosting support, Keith Packard, 2021/01/07
- [PATCH 1/9] semihosting: Move ARM semihosting code to shared directories, Keith Packard, 2021/01/07
- [PATCH 9/9] semihosting: Implement SYS_ISERROR, Keith Packard, 2021/01/07
- [PATCH 7/9] semihosting: Implement SYS_ELAPSED and SYS_TICKFREQ, Keith Packard, 2021/01/07
- [PATCH 8/9] semihosting: Implement SYS_TMPNAM, Keith Packard, 2021/01/07
- [PATCH 4/9] semihosting: Support SYS_HEAPINFO when env->boot_info is not set, Keith Packard, 2021/01/07
- [PATCH 2/9] semihosting: Change common-semi API to be architecture-independent, Keith Packard, 2021/01/07
- [PATCH 6/9] riscv: Add semihosting support for user mode, Keith Packard, 2021/01/07
- [PATCH 3/9] semihosting: Change internal common-semi interfaces to use CPUState *,
Keith Packard <=
- Re: [PATCH 0/9] Add RISC-V semihosting 0.2. Finish ARM semihosting 2.0, Alex Bennée, 2021/01/08