From: "Dr. David Alan Gilbert" <dave@treblig.org>
handle_vm86_fault has been unused since:
1ade5b2fed ("linux-user/i386: Split out maybe_handle_vm86_trap")
Remove it, and it's local macros.
Signed-off-by: Dr. David Alan Gilbert <dave@treblig.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
---
linux-user/user-internals.h | 1 -
linux-user/vm86.c | 136 ------------------------------------
2 files changed, 137 deletions(-)
diff --git a/linux-user/user-internals.h b/linux-user/user-internals.h
index 5c7f173ceb..46ffc093f4 100644
--- a/linux-user/user-internals.h
+++ b/linux-user/user-internals.h
@@ -102,7 +102,6 @@ int host_to_target_waitstatus(int status);
/* vm86.c */
void save_v86_state(CPUX86State *env);
void handle_vm86_trap(CPUX86State *env, int trapno);
-void handle_vm86_fault(CPUX86State *env);
int do_vm86(CPUX86State *env, long subfunction, abi_ulong v86_addr);
#elif defined(TARGET_SPARC64)
void sparc64_set_context(CPUSPARCState *env);
diff --git a/linux-user/vm86.c b/linux-user/vm86.c
index 9f512a2242..31a2d707cf 100644
--- a/linux-user/vm86.c
+++ b/linux-user/vm86.c
@@ -255,142 +255,6 @@ void handle_vm86_trap(CPUX86State *env, int trapno)
}
}
-#define CHECK_IF_IN_TRAP() \
- if ((ts->vm86plus.vm86plus.flags & TARGET_vm86dbg_active) && \
- (ts->vm86plus.vm86plus.flags & TARGET_vm86dbg_TFpendig)) \
- newflags |= TF_MASK
-
-#define VM86_FAULT_RETURN \
- if ((ts->vm86plus.vm86plus.flags & TARGET_force_return_for_pic) && \
- (ts->v86flags & (IF_MASK | VIF_MASK))) \
- return_to_32bit(env, TARGET_VM86_PICRETURN); \
- return
-
-void handle_vm86_fault(CPUX86State *env)
-{
- CPUState *cs = env_cpu(env);
- TaskState *ts = get_task_state(cs);
- uint32_t csp, ssp;
- unsigned int ip, sp, newflags, newip, newcs, opcode, intno;
- int data32, pref_done;
-
- csp = env->segs[R_CS].selector << 4;
- ip = env->eip & 0xffff;
-
- ssp = env->segs[R_SS].selector << 4;
- sp = env->regs[R_ESP] & 0xffff;
-
- LOG_VM86("VM86 exception %04x:%08x\n",
- env->segs[R_CS].selector, env->eip);
-
- data32 = 0;
- pref_done = 0;
- do {
- opcode = vm_getb(env, csp, ip);
- ADD16(ip, 1);
- switch (opcode) {
- case 0x66: /* 32-bit data */ data32=1; break;
- case 0x67: /* 32-bit address */ break;
- case 0x2e: /* CS */ break;
- case 0x3e: /* DS */ break;
- case 0x26: /* ES */ break;
- case 0x36: /* SS */ break;
- case 0x65: /* GS */ break;
- case 0x64: /* FS */ break;
- case 0xf2: /* repnz */ break;
- case 0xf3: /* rep */ break;
- default: pref_done = 1;
- }
- } while (!pref_done);
-
- /* VM86 mode */
- switch(opcode) {
- case 0x9c: /* pushf */
- if (data32) {
- vm_putl(env, ssp, sp - 4, get_vflags(env));
- ADD16(env->regs[R_ESP], -4);
- } else {
- vm_putw(env, ssp, sp - 2, get_vflags(env));
- ADD16(env->regs[R_ESP], -2);
- }
- env->eip = ip;
- VM86_FAULT_RETURN;
-
- case 0x9d: /* popf */
- if (data32) {
- newflags = vm_getl(env, ssp, sp);
- ADD16(env->regs[R_ESP], 4);
- } else {
- newflags = vm_getw(env, ssp, sp);
- ADD16(env->regs[R_ESP], 2);
- }
- env->eip = ip;
- CHECK_IF_IN_TRAP();
- if (data32) {
- if (set_vflags_long(newflags, env))
- return;
- } else {
- if (set_vflags_short(newflags, env))
- return;
- }
- VM86_FAULT_RETURN;
-
- case 0xcd: /* int */
- intno = vm_getb(env, csp, ip);
- ADD16(ip, 1);
- env->eip = ip;
- if (ts->vm86plus.vm86plus.flags & TARGET_vm86dbg_active) {
- if ( (ts->vm86plus.vm86plus.vm86dbg_intxxtab[intno >> 3] >>
- (intno &7)) & 1) {
- return_to_32bit(env, TARGET_VM86_INTx + (intno << 8));
- return;
- }
- }
- do_int(env, intno);
- break;
-
- case 0xcf: /* iret */
- if (data32) {
- newip = vm_getl(env, ssp, sp) & 0xffff;
- newcs = vm_getl(env, ssp, sp + 4) & 0xffff;
- newflags = vm_getl(env, ssp, sp + 8);
- ADD16(env->regs[R_ESP], 12);
- } else {
- newip = vm_getw(env, ssp, sp);
- newcs = vm_getw(env, ssp, sp + 2);
- newflags = vm_getw(env, ssp, sp + 4);
- ADD16(env->regs[R_ESP], 6);
- }
- env->eip = newip;
- cpu_x86_load_seg(env, R_CS, newcs);
- CHECK_IF_IN_TRAP();
- if (data32) {
- if (set_vflags_long(newflags, env))
- return;
- } else {
- if (set_vflags_short(newflags, env))
- return;
- }
- VM86_FAULT_RETURN;
-
- case 0xfa: /* cli */
- env->eip = ip;
- clear_IF(env);
- VM86_FAULT_RETURN;
-
- case 0xfb: /* sti */
- env->eip = ip;
- if (set_IF(env))
- return;
- VM86_FAULT_RETURN;
-
- default:
- /* real VM86 GPF exception */
- return_to_32bit(env, TARGET_VM86_UNKNOWN);
- break;
- }
-}
-
int do_vm86(CPUX86State *env, long subfunction, abi_ulong vm86_addr)
{
CPUState *cs = env_cpu(env);
--
2.39.5On 04/10/2024 18.03, Michael Tokarev wrote:
> From: "Dr. David Alan Gilbert" <dave@treblig.org>
>
> handle_vm86_fault has been unused since:
> 1ade5b2fed ("linux-user/i386: Split out maybe_handle_vm86_trap")
>
> Remove it, and it's local macros.
>
> Signed-off-by: Dr. David Alan Gilbert <dave@treblig.org>
> Reviewed-by: Thomas Huth <thuth@redhat.com>
> Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
> ---
> linux-user/user-internals.h | 1 -
> linux-user/vm86.c | 136 ------------------------------------
> 2 files changed, 137 deletions(-)
>
> diff --git a/linux-user/user-internals.h b/linux-user/user-internals.h
> index 5c7f173ceb..46ffc093f4 100644
> --- a/linux-user/user-internals.h
> +++ b/linux-user/user-internals.h
> @@ -102,7 +102,6 @@ int host_to_target_waitstatus(int status);
> /* vm86.c */
> void save_v86_state(CPUX86State *env);
> void handle_vm86_trap(CPUX86State *env, int trapno);
> -void handle_vm86_fault(CPUX86State *env);
> int do_vm86(CPUX86State *env, long subfunction, abi_ulong v86_addr);
> #elif defined(TARGET_SPARC64)
> void sparc64_set_context(CPUSPARCState *env);
> diff --git a/linux-user/vm86.c b/linux-user/vm86.c
> index 9f512a2242..31a2d707cf 100644
> --- a/linux-user/vm86.c
> +++ b/linux-user/vm86.c
> @@ -255,142 +255,6 @@ void handle_vm86_trap(CPUX86State *env, int trapno)
> }
> }
>
> -#define CHECK_IF_IN_TRAP() \
> - if ((ts->vm86plus.vm86plus.flags & TARGET_vm86dbg_active) && \
> - (ts->vm86plus.vm86plus.flags & TARGET_vm86dbg_TFpendig)) \
> - newflags |= TF_MASK
> -
> -#define VM86_FAULT_RETURN \
> - if ((ts->vm86plus.vm86plus.flags & TARGET_force_return_for_pic) && \
> - (ts->v86flags & (IF_MASK | VIF_MASK))) \
> - return_to_32bit(env, TARGET_VM86_PICRETURN); \
> - return
> -
> -void handle_vm86_fault(CPUX86State *env)
> -{
> - CPUState *cs = env_cpu(env);
> - TaskState *ts = get_task_state(cs);
> - uint32_t csp, ssp;
> - unsigned int ip, sp, newflags, newip, newcs, opcode, intno;
> - int data32, pref_done;
> -
> - csp = env->segs[R_CS].selector << 4;
> - ip = env->eip & 0xffff;
> -
> - ssp = env->segs[R_SS].selector << 4;
> - sp = env->regs[R_ESP] & 0xffff;
> -
> - LOG_VM86("VM86 exception %04x:%08x\n",
> - env->segs[R_CS].selector, env->eip);
> -
> - data32 = 0;
> - pref_done = 0;
> - do {
> - opcode = vm_getb(env, csp, ip);
> - ADD16(ip, 1);
> - switch (opcode) {
> - case 0x66: /* 32-bit data */ data32=1; break;
> - case 0x67: /* 32-bit address */ break;
> - case 0x2e: /* CS */ break;
> - case 0x3e: /* DS */ break;
> - case 0x26: /* ES */ break;
> - case 0x36: /* SS */ break;
> - case 0x65: /* GS */ break;
> - case 0x64: /* FS */ break;
> - case 0xf2: /* repnz */ break;
> - case 0xf3: /* rep */ break;
> - default: pref_done = 1;
> - }
> - } while (!pref_done);
> -
> - /* VM86 mode */
> - switch(opcode) {
> - case 0x9c: /* pushf */
> - if (data32) {
> - vm_putl(env, ssp, sp - 4, get_vflags(env));
> - ADD16(env->regs[R_ESP], -4);
> - } else {
> - vm_putw(env, ssp, sp - 2, get_vflags(env));
> - ADD16(env->regs[R_ESP], -2);
> - }
> - env->eip = ip;
> - VM86_FAULT_RETURN;
> -
> - case 0x9d: /* popf */
> - if (data32) {
> - newflags = vm_getl(env, ssp, sp);
> - ADD16(env->regs[R_ESP], 4);
> - } else {
> - newflags = vm_getw(env, ssp, sp);
> - ADD16(env->regs[R_ESP], 2);
> - }
> - env->eip = ip;
> - CHECK_IF_IN_TRAP();
> - if (data32) {
> - if (set_vflags_long(newflags, env))
> - return;
> - } else {
> - if (set_vflags_short(newflags, env))
> - return;
> - }
> - VM86_FAULT_RETURN;
> -
> - case 0xcd: /* int */
> - intno = vm_getb(env, csp, ip);
> - ADD16(ip, 1);
> - env->eip = ip;
> - if (ts->vm86plus.vm86plus.flags & TARGET_vm86dbg_active) {
> - if ( (ts->vm86plus.vm86plus.vm86dbg_intxxtab[intno >> 3] >>
> - (intno &7)) & 1) {
> - return_to_32bit(env, TARGET_VM86_INTx + (intno << 8));
> - return;
> - }
> - }
> - do_int(env, intno);
> - break;
> -
> - case 0xcf: /* iret */
> - if (data32) {
> - newip = vm_getl(env, ssp, sp) & 0xffff;
> - newcs = vm_getl(env, ssp, sp + 4) & 0xffff;
> - newflags = vm_getl(env, ssp, sp + 8);
> - ADD16(env->regs[R_ESP], 12);
> - } else {
> - newip = vm_getw(env, ssp, sp);
> - newcs = vm_getw(env, ssp, sp + 2);
> - newflags = vm_getw(env, ssp, sp + 4);
> - ADD16(env->regs[R_ESP], 6);
> - }
> - env->eip = newip;
> - cpu_x86_load_seg(env, R_CS, newcs);
> - CHECK_IF_IN_TRAP();
> - if (data32) {
> - if (set_vflags_long(newflags, env))
> - return;
> - } else {
> - if (set_vflags_short(newflags, env))
> - return;
> - }
> - VM86_FAULT_RETURN;
> -
> - case 0xfa: /* cli */
> - env->eip = ip;
> - clear_IF(env);
> - VM86_FAULT_RETURN;
> -
> - case 0xfb: /* sti */
> - env->eip = ip;
> - if (set_IF(env))
> - return;
> - VM86_FAULT_RETURN;
> -
> - default:
> - /* real VM86 GPF exception */
> - return_to_32bit(env, TARGET_VM86_UNKNOWN);
> - break;
> - }
> -}
FYI, looks like this broke compiling with Clang:
../../devel/qemu/linux-user/vm86.c:50:20: error: unused function 'vm_putl'
[-Werror,-Wunused-function]
50 | static inline void vm_putl(CPUX86State *env, uint32_t segptr,
| ^~~~~~~
../../devel/qemu/linux-user/vm86.c:56:28: error: unused function 'vm_getb'
[-Werror,-Wunused-function]
56 | static inline unsigned int vm_getb(CPUX86State *env,
| ^~~~~~~
../../devel/qemu/linux-user/vm86.c:62:28: error: unused function 'vm_getw'
[-Werror,-Wunused-function]
62 | static inline unsigned int vm_getw(CPUX86State *env,
| ^~~~~~~
../../devel/qemu/linux-user/vm86.c:68:28: error: unused function 'vm_getl'
[-Werror,-Wunused-function]
68 | static inline unsigned int vm_getl(CPUX86State *env,
| ^~~~~~~
../../devel/qemu/linux-user/vm86.c:165:19: error: unused function
'set_vflags_long' [-Werror,-Wunused-function]
165 | static inline int set_vflags_long(unsigned long eflags, CPUX86State
*env)
| ^~~~~~~~~~~~~~~
../../devel/qemu/linux-user/vm86.c:179:19: error: unused function
'set_vflags_short' [-Werror,-Wunused-function]
179 | static inline int set_vflags_short(unsigned short flags,
CPUX86State *env)
| ^~~~~~~~~~~~~~~~
6 errors generated.
Should be easy to fix, I guess..
Thomas
On 11.10.2024 19:02, Thomas Huth wrote:
> On 04/10/2024 18.03, Michael Tokarev wrote:
>> From: "Dr. David Alan Gilbert" <dave@treblig.org>
>>
>> handle_vm86_fault has been unused since:
>> 1ade5b2fed ("linux-user/i386: Split out maybe_handle_vm86_trap")
>>
>> Remove it, and it's local macros.
> FYI, looks like this broke compiling with Clang:
>
> ../../devel/qemu/linux-user/vm86.c:50:20: error: unused function
> 'vm_putl' [-Werror,-Wunused-function]
> 50 | static inline void vm_putl(CPUX86State *env, uint32_t segptr,
> | ^~~~~~~
> ../../devel/qemu/linux-user/vm86.c:56:28: error: unused function
> 'vm_getb' [-Werror,-Wunused-function]
...
Hm. I built it with clang before sending the MR.
But it was clang16 - the most recent one on bookworm. It
does not show this issue :)
Apparently I should upgrade clang somehow.
Thank you for the fix!
/mjt
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