On 29/05/20 23:26, Roman Bolshakov wrote: > binutils 2.33 and 2.34 changed generation of PUSH and POP for segment > registers and IRET in '.code16gcc' [1][2][3][4]. gas also yields the > following warnings during the build of realmode.c: > > snip.s: Assembler messages: > snip.s:2279: Warning: generating 32-bit `push', unlike earlier gas versions > snip.s:2296: Warning: generating 32-bit `pop', unlike earlier gas versions > snip.s:3633: Warning: generating 16-bit `iret' for .code16gcc directive > > This change fixes warnings and failures of the tests: > > push/pop 3 > push/pop 4 > iret 1 > iret 3 > > 1. https://sourceware.org/bugzilla/show_bug.cgi?id=24485 > 2. https://sourceware.org/git/?p=binutils-gdb.git;h=7cb22ff84745 > 3. https://sourceware.org/git/?p=binutils-gdb.git;h=06f74c5cb868 > 4. https://sourceware.org/git/?p=binutils-gdb.git;h=13e600d0f560 > > Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx> > Signed-off-by: Roman Bolshakov <r.bolshakov@xxxxxxxxx> > --- > x86/realmode.c | 32 ++++++++++++++++---------------- > 1 file changed, 16 insertions(+), 16 deletions(-) > > diff --git a/x86/realmode.c b/x86/realmode.c > index 3518224..234d607 100644 > --- a/x86/realmode.c > +++ b/x86/realmode.c > @@ -649,24 +649,24 @@ static void test_push_pop(void) > MK_INSN(push_es, "mov $0x231, %bx\n\t" //Just write a dummy value to see if it gets overwritten > "mov $0x123, %ax\n\t" > "mov %ax, %es\n\t" > - "push %es\n\t" > + "pushw %es\n\t" > "pop %bx \n\t" > ); > MK_INSN(pop_es, "push %ax\n\t" > - "pop %es\n\t" > + "popw %es\n\t" > "mov %es, %bx\n\t" > ); > - MK_INSN(push_pop_ss, "push %ss\n\t" > + MK_INSN(push_pop_ss, "pushw %ss\n\t" > "pushw %ax\n\t" > "popw %ss\n\t" > "mov %ss, %bx\n\t" > - "pop %ss\n\t" > + "popw %ss\n\t" > ); > - MK_INSN(push_pop_fs, "push %fs\n\t" > + MK_INSN(push_pop_fs, "pushl %fs\n\t" > "pushl %eax\n\t" > "popl %fs\n\t" > "mov %fs, %ebx\n\t" > - "pop %fs\n\t" > + "popl %fs\n\t" > ); > MK_INSN(push_pop_high_esp_bits, > "xor $0x12340000, %esp \n\t" > @@ -752,7 +752,7 @@ static void test_iret(void) > "pushl %cs\n\t" > "call 1f\n\t" /* a near call will push eip onto the stack */ > "jmp 2f\n\t" > - "1: iret\n\t" > + "1: iretl\n\t" > "2:\n\t" > ); > > @@ -771,7 +771,7 @@ static void test_iret(void) > "pushl %cs\n\t" > "call 1f\n\t" > "jmp 2f\n\t" > - "1: iret\n\t" > + "1: iretl\n\t" > "2:\n\t"); > > MK_INSN(iret_flags16, "pushfw\n\t" > @@ -1340,10 +1340,10 @@ static void test_lds_lss(void) > { > init_inregs(&(struct regs){ .ebx = (unsigned long)&desc }); > > - MK_INSN(lds, "push %ds\n\t" > + MK_INSN(lds, "pushl %ds\n\t" > "lds (%ebx), %eax\n\t" > "mov %ds, %ebx\n\t" > - "pop %ds\n\t"); > + "popl %ds\n\t"); > exec_in_big_real_mode(&insn_lds); > report("lds", R_AX | R_BX, > outregs.eax == (unsigned long)desc.address && > @@ -1356,28 +1356,28 @@ static void test_lds_lss(void) > outregs.eax == (unsigned long)desc.address && > outregs.ebx == desc.sel); > > - MK_INSN(lfs, "push %fs\n\t" > + MK_INSN(lfs, "pushl %fs\n\t" > "lfs (%ebx), %eax\n\t" > "mov %fs, %ebx\n\t" > - "pop %fs\n\t"); > + "popl %fs\n\t"); > exec_in_big_real_mode(&insn_lfs); > report("lfs", R_AX | R_BX, > outregs.eax == (unsigned long)desc.address && > outregs.ebx == desc.sel); > > - MK_INSN(lgs, "push %gs\n\t" > + MK_INSN(lgs, "pushl %gs\n\t" > "lgs (%ebx), %eax\n\t" > "mov %gs, %ebx\n\t" > - "pop %gs\n\t"); > + "popl %gs\n\t"); > exec_in_big_real_mode(&insn_lgs); > report("lgs", R_AX | R_BX, > outregs.eax == (unsigned long)desc.address && > outregs.ebx == desc.sel); > > - MK_INSN(lss, "push %ss\n\t" > + MK_INSN(lss, "pushl %ss\n\t" > "lss (%ebx), %eax\n\t" > "mov %ss, %ebx\n\t" > - "pop %ss\n\t"); > + "popl %ss\n\t"); > exec_in_big_real_mode(&insn_lss); > report("lss", R_AX | R_BX, > outregs.eax == (unsigned long)desc.address && > Queued, thanks. Paolo
