[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v16 8/9] x86/boot: rename sym_phys() to sym_offs()
This way macro name better describes its function. Currently it is used to calculate symbol offset in relation to the beginning of Xen image mapping. However, value returned by sym_offs() for a given symbol is not always equal its physical address. There is no functional change. Suggested-by: Jan Beulich <jbeulich@xxxxxxxx> Signed-off-by: Daniel Kiper <daniel.kiper@xxxxxxxxxx> Acked-by: Jan Beulich <jbeulich@xxxxxxxx> Reviewed-by: Doug Goldstein <cardoe@xxxxxxxxxx> --- v8 - suggestions/fixes: - improve commit message (suggested by Jan Beulich). --- xen/arch/x86/boot/head.S | 38 +++++++++++++++++++------------------- xen/arch/x86/boot/trampoline.S | 2 +- xen/arch/x86/boot/wakeup.S | 4 ++-- xen/arch/x86/boot/x86_64.S | 18 +++++++++--------- 4 files changed, 31 insertions(+), 31 deletions(-) diff --git a/xen/arch/x86/boot/head.S b/xen/arch/x86/boot/head.S index 658e40a..dba336d 100644 --- a/xen/arch/x86/boot/head.S +++ b/xen/arch/x86/boot/head.S @@ -11,9 +11,9 @@ .text .code32 -#define sym_phys(sym) ((sym) - __XEN_VIRT_START) -#define sym_esi(sym) sym_phys(sym)(%esi) -#define sym_fs(sym) %fs:sym_phys(sym) +#define sym_offs(sym) ((sym) - __XEN_VIRT_START) +#define sym_esi(sym) sym_offs(sym)(%esi) +#define sym_fs(sym) %fs:sym_offs(sym) #define BOOT_CS32 0x0008 #define BOOT_CS64 0x0010 @@ -96,7 +96,7 @@ multiboot2_header_start: /* EFI64 Multiboot2 entry point. */ mb2ht_init MB2_HT(ENTRY_ADDRESS_EFI64), MB2_HT(OPTIONAL), \ - sym_phys(__efi64_mb2_start) + sym_offs(__efi64_mb2_start) /* Multiboot2 header end tag. */ mb2ht_init MB2_HT(END), MB2_HT(REQUIRED) @@ -118,7 +118,7 @@ multiboot2_header_start: gdt_boot_descr: .word 7*8-1 gdt_boot_base: - .long sym_phys(trampoline_gdt) + .long sym_offs(trampoline_gdt) .long 0 /* Needed for 64-bit lgdt */ vga_text_buffer: @@ -130,21 +130,21 @@ efi_platform: .section .init.text, "ax", @progbits bad_cpu: - add $sym_phys(.Lbad_cpu_msg),%esi # Error message + add $sym_offs(.Lbad_cpu_msg),%esi # Error message jmp .Lget_vtb not_multiboot: - add $sym_phys(.Lbad_ldr_msg),%esi # Error message + add $sym_offs(.Lbad_ldr_msg),%esi # Error message jmp .Lget_vtb .Lmb2_no_st: /* * Here we are on EFI platform. vga_text_buffer was zapped earlier * because there is pretty good chance that VGA is unavailable. */ - add $sym_phys(.Lbad_ldr_nst),%esi # Error message + add $sym_offs(.Lbad_ldr_nst),%esi # Error message jmp .Lget_vtb .Lmb2_no_ih: /* Ditto. */ - add $sym_phys(.Lbad_ldr_nih),%esi # Error message + add $sym_offs(.Lbad_ldr_nih),%esi # Error message jmp .Lget_vtb .Lmb2_no_bs: /* @@ -152,7 +152,7 @@ not_multiboot: * via start label. Then reliable vga_text_buffer zap is impossible * in Multiboot2 scanning loop and we have to zero %edi below. */ - add $sym_phys(.Lbad_ldr_nbs),%esi # Error message + add $sym_offs(.Lbad_ldr_nbs),%esi # Error message xor %edi,%edi # No VGA text buffer jmp .Lsend_chr .Lmb2_efi_ia_32: @@ -160,7 +160,7 @@ not_multiboot: * Here we are on EFI IA-32 platform. Then reliable vga_text_buffer zap is * impossible in Multiboot2 scanning loop and we have to zero %edi below. */ - add $sym_phys(.Lbad_efi_msg),%esi # Error message + add $sym_offs(.Lbad_efi_msg),%esi # Error message xor %edi,%edi # No VGA text buffer jmp .Lsend_chr .Lget_vtb: @@ -371,7 +371,7 @@ __start: cli /* Load default Xen image load base address. */ - mov $sym_phys(__image_base__),%esi + mov $sym_offs(__image_base__),%esi /* Bootloaders may set multiboot{1,2}.mem_lower to a nonzero value. */ xor %edx,%edx @@ -543,8 +543,8 @@ trampoline_setup: jnz 1f /* Initialize BSS (no nasty surprises!). */ - mov $sym_phys(__bss_start),%edi - mov $sym_phys(__bss_end),%ecx + mov $sym_offs(__bss_start),%edi + mov $sym_offs(__bss_end),%ecx push %fs pop %es sub %edi,%ecx @@ -617,22 +617,22 @@ trampoline_setup: /* Apply relocations to bootstrap trampoline. */ mov sym_fs(trampoline_phys),%edx - mov $sym_phys(__trampoline_rel_start),%edi + mov $sym_offs(__trampoline_rel_start),%edi 1: mov %fs:(%edi),%eax add %edx,%fs:(%edi,%eax) add $4,%edi - cmp $sym_phys(__trampoline_rel_stop),%edi + cmp $sym_offs(__trampoline_rel_stop),%edi jb 1b /* Patch in the trampoline segment. */ shr $4,%edx - mov $sym_phys(__trampoline_seg_start),%edi + mov $sym_offs(__trampoline_seg_start),%edi 1: mov %fs:(%edi),%eax mov %dx,%fs:(%edi,%eax) add $4,%edi - cmp $sym_phys(__trampoline_seg_stop),%edi + cmp $sym_offs(__trampoline_seg_stop),%edi jb 1b /* Do not parse command line on EFI platform here. */ @@ -658,7 +658,7 @@ trampoline_setup: push %eax /* Copy bootstrap trampoline to low memory, below 1MB. */ - mov $sym_phys(trampoline_start),%esi + mov $sym_offs(trampoline_start),%esi mov $((trampoline_end - trampoline_start) / 4),%ecx rep movsl %fs:(%esi),%es:(%edi) diff --git a/xen/arch/x86/boot/trampoline.S b/xen/arch/x86/boot/trampoline.S index 64f8efd..b96607a 100644 --- a/xen/arch/x86/boot/trampoline.S +++ b/xen/arch/x86/boot/trampoline.S @@ -92,7 +92,7 @@ trampoline_protmode_entry: mov %ecx,%cr4 /* Load pagetable base register. */ - mov $sym_phys(idle_pg_table),%eax + mov $sym_offs(idle_pg_table),%eax add bootsym_rel(trampoline_xen_phys_start,4,%eax) mov %eax,%cr3 diff --git a/xen/arch/x86/boot/wakeup.S b/xen/arch/x86/boot/wakeup.S index 08ea9b2..42d57ab 100644 --- a/xen/arch/x86/boot/wakeup.S +++ b/xen/arch/x86/boot/wakeup.S @@ -120,7 +120,7 @@ wakeup_32: mov $bootsym_rel(wakeup_stack, 4, %esp) # check saved magic again - mov $sym_phys(saved_magic), %eax + mov $sym_offs(saved_magic),%eax add bootsym_rel(trampoline_xen_phys_start, 4, %eax) mov (%eax), %eax cmp $0x9abcdef0, %eax @@ -133,7 +133,7 @@ wakeup_32: mov %ecx, %cr4 /* Load pagetable base register */ - mov $sym_phys(idle_pg_table),%eax + mov $sym_offs(idle_pg_table),%eax add bootsym_rel(trampoline_xen_phys_start,4,%eax) mov %eax,%cr3 diff --git a/xen/arch/x86/boot/x86_64.S b/xen/arch/x86/boot/x86_64.S index d07c360..b6f2792 100644 --- a/xen/arch/x86/boot/x86_64.S +++ b/xen/arch/x86/boot/x86_64.S @@ -112,7 +112,7 @@ GLOBAL(__page_tables_start) * actualy mapped (mostly using superpages). Uses 4x 4k pages. */ GLOBAL(l2_identmap) - .quad sym_phys(l1_identmap) + __PAGE_HYPERVISOR + .quad sym_offs(l1_identmap) + __PAGE_HYPERVISOR idx = 1 .rept 7 .quad (idx << L2_PAGETABLE_SHIFT) | PAGE_HYPERVISOR | _PAGE_PSE @@ -130,7 +130,7 @@ GLOBAL(l2_xenmap) .quad 0 idx = 1 .rept 7 - .quad sym_phys(__image_base__) + (idx << L2_PAGETABLE_SHIFT) + (PAGE_HYPERVISOR | _PAGE_PSE) + .quad sym_offs(__image_base__) + (idx << L2_PAGETABLE_SHIFT) + (PAGE_HYPERVISOR | _PAGE_PSE) idx = idx + 1 .endr .fill L2_PAGETABLE_ENTRIES - 8, 8, 0 @@ -141,7 +141,7 @@ l2_fixmap: idx = 0 .rept L2_PAGETABLE_ENTRIES .if idx == l2_table_offset(FIXADDR_TOP - 1) - .quad sym_phys(l1_fixmap) + __PAGE_HYPERVISOR + .quad sym_offs(l1_fixmap) + __PAGE_HYPERVISOR .else .quad 0 .endif @@ -153,7 +153,7 @@ l2_fixmap: l3_identmap: idx = 0 .rept 4 - .quad sym_phys(l2_identmap) + (idx << PAGE_SHIFT) + __PAGE_HYPERVISOR + .quad sym_offs(l2_identmap) + (idx << PAGE_SHIFT) + __PAGE_HYPERVISOR idx = idx + 1 .endr .fill L3_PAGETABLE_ENTRIES - 4, 8, 0 @@ -164,9 +164,9 @@ l3_xenmap: idx = 0 .rept L3_PAGETABLE_ENTRIES .if idx == l3_table_offset(XEN_VIRT_START) - .quad sym_phys(l2_xenmap) + __PAGE_HYPERVISOR + .quad sym_offs(l2_xenmap) + __PAGE_HYPERVISOR .elseif idx == l3_table_offset(FIXADDR_TOP - 1) - .quad sym_phys(l2_fixmap) + __PAGE_HYPERVISOR + .quad sym_offs(l2_fixmap) + __PAGE_HYPERVISOR .else .quad 0 .endif @@ -176,13 +176,13 @@ l3_xenmap: /* Top-level master (and idle-domain) page directory. */ GLOBAL(idle_pg_table) - .quad sym_phys(l3_bootmap) + __PAGE_HYPERVISOR + .quad sym_offs(l3_bootmap) + __PAGE_HYPERVISOR idx = 1 .rept L4_PAGETABLE_ENTRIES - 1 .if idx == l4_table_offset(DIRECTMAP_VIRT_START) - .quad sym_phys(l3_identmap) + __PAGE_HYPERVISOR + .quad sym_offs(l3_identmap) + __PAGE_HYPERVISOR .elseif idx == l4_table_offset(XEN_VIRT_START) - .quad sym_phys(l3_xenmap) + __PAGE_HYPERVISOR + .quad sym_offs(l3_xenmap) + __PAGE_HYPERVISOR .else .quad 0 .endif -- 1.7.10.4 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx https://lists.xen.org/xen-devel
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |