diff options
Diffstat (limited to 'debian/patches/gcc12_build_array_bounds.patch')
| -rw-r--r-- | debian/patches/gcc12_build_array_bounds.patch | 493 |
1 files changed, 493 insertions, 0 deletions
diff --git a/debian/patches/gcc12_build_array_bounds.patch b/debian/patches/gcc12_build_array_bounds.patch new file mode 100644 index 0000000..c28bcb6 --- /dev/null +++ b/debian/patches/gcc12_build_array_bounds.patch @@ -0,0 +1,493 @@ +Borrowed and tweaked fix from: + +commit acffb81485e35e1f28152949a1c6e1d4dbf5172e +Author: Michael Chang <mchang@suse.com> +Date: Mon Mar 28 15:00:53 2022 +0800 + +build: Fix -Werror=array-bounds array subscript 0 is outside array bounds + +diff --git a/grub-core/bus/cs5536.c b/grub-core/bus/cs5536.c +index 8c90ed598..cd0a45e58 100644 +--- a/grub-core/bus/cs5536.c ++++ b/grub-core/bus/cs5536.c +@@ -331,8 +331,9 @@ grub_cs5536_init_geode (grub_pci_device_t dev) + + { + volatile grub_uint32_t *oc; +- oc = grub_pci_device_map_range (dev, 0x05022000, +- GRUB_CS5536_USB_OPTION_REGS_SIZE); ++ ++ oc = grub_absolute_pointer (grub_pci_device_map_range (dev, 0x05022000, ++ GRUB_CS5536_USB_OPTION_REGS_SIZE)); + + oc[GRUB_CS5536_USB_OPTION_REG_UOCMUX] = + (oc[GRUB_CS5536_USB_OPTION_REG_UOCMUX] +diff --git a/grub-core/commands/acpi.c b/grub-core/commands/acpi.c +index 1215f2a62..fda62f4ea 100644 +--- a/grub-core/commands/acpi.c ++++ b/grub-core/commands/acpi.c +@@ -168,7 +168,7 @@ grub_acpi_create_ebda (void) + struct grub_acpi_rsdp_v10 *v1; + struct grub_acpi_rsdp_v20 *v2; + +- ebda = (grub_uint8_t *) (grub_addr_t) ((*((grub_uint16_t *)0x40e)) << 4); ++ ebda = (grub_uint8_t *) (grub_addr_t) ((*((grub_uint16_t *) grub_absolute_pointer (0x40e))) << 4); + grub_dprintf ("acpi", "EBDA @%p\n", ebda); + if (ebda) + ebda_kb_len = *(grub_uint16_t *) ebda; +@@ -298,7 +298,7 @@ grub_acpi_create_ebda (void) + *target = 0; + + grub_dprintf ("acpi", "Switching EBDA\n"); +- (*((grub_uint16_t *) 0x40e)) = ((grub_addr_t) targetebda) >> 4; ++ (*((grub_uint16_t *) grub_absolute_pointer (0x40e))) = ((grub_addr_t) targetebda) >> 4; + grub_dprintf ("acpi", "EBDA switched\n"); + + return GRUB_ERR_NONE; +diff --git a/grub-core/commands/efi/loadbios.c b/grub-core/commands/efi/loadbios.c +index 5c7725f8b..574e41046 100644 +--- a/grub-core/commands/efi/loadbios.c ++++ b/grub-core/commands/efi/loadbios.c +@@ -46,7 +46,7 @@ enable_rom_area (void) + grub_uint32_t *rom_ptr; + grub_pci_device_t dev = { .bus = 0, .device = 0, .function = 0}; + +- rom_ptr = (grub_uint32_t *) VBIOS_ADDR; ++ rom_ptr = grub_absolute_pointer (VBIOS_ADDR); + if (*rom_ptr != BLANK_MEM) + { + grub_puts_ (N_("ROM image is present.")); +@@ -96,8 +96,8 @@ fake_bios_data (int use_rom) + void *acpi, *smbios; + grub_uint16_t *ebda_seg_ptr, *low_mem_ptr; + +- ebda_seg_ptr = (grub_uint16_t *) EBDA_SEG_ADDR; +- low_mem_ptr = (grub_uint16_t *) LOW_MEM_ADDR; ++ ebda_seg_ptr = grub_absolute_pointer (EBDA_SEG_ADDR); ++ low_mem_ptr = grub_absolute_pointer (LOW_MEM_ADDR); + if ((*ebda_seg_ptr) || (*low_mem_ptr)) + return; + +@@ -132,7 +132,8 @@ fake_bios_data (int use_rom) + *ebda_seg_ptr = FAKE_EBDA_SEG; + *low_mem_ptr = (FAKE_EBDA_SEG >> 6); + +- *((grub_uint16_t *) (FAKE_EBDA_SEG << 4)) = 640 - *low_mem_ptr; ++ /* *((grub_uint16_t *) (FAKE_EBDA_SEG << 4)) = 640 - *low_mem_ptr; */ ++ *((grub_uint16_t *) (grub_absolute_pointer (FAKE_EBDA_SEG << 4))) = 640 - *low_mem_ptr; + + if (acpi) + grub_memcpy ((char *) ((FAKE_EBDA_SEG << 4) + 16), acpi, 1024 - 16); +diff --git a/grub-core/commands/i386/pc/drivemap.c b/grub-core/commands/i386/pc/drivemap.c +index 3fb22dc46..a7ee4c9bd 100644 +--- a/grub-core/commands/i386/pc/drivemap.c ++++ b/grub-core/commands/i386/pc/drivemap.c +@@ -31,9 +31,6 @@ + + GRUB_MOD_LICENSE ("GPLv3+"); + +-/* Real mode IVT slot (seg:off far pointer) for interrupt 0x13. */ +-static grub_uint32_t *const int13slot = (grub_uint32_t *) (4 * 0x13); +- + /* Remember to update enum opt_idxs accordingly. */ + static const struct grub_arg_option options[] = { + /* TRANSLATORS: In this file "mapping" refers to a change GRUB makes so if +@@ -280,6 +277,8 @@ install_int13_handler (int noret __attribute__ ((unused))) + grub_uint8_t *handler_base = 0; + /* Address of the map within the deployed bundle. */ + int13map_node_t *handler_map; ++ /* Real mode IVT slot (seg:off far pointer) for interrupt 0x13. */ ++ grub_uint32_t *int13slot = (grub_uint32_t *) grub_absolute_pointer (4 * 0x13); + + int i; + int entries = 0; +@@ -354,6 +353,9 @@ install_int13_handler (int noret __attribute__ ((unused))) + static grub_err_t + uninstall_int13_handler (void) + { ++ /* Real mode IVT slot (seg:off far pointer) for interrupt 0x13. */ ++ grub_uint32_t *int13slot = (grub_uint32_t *) grub_absolute_pointer (4 * 0x13); ++ + if (! grub_drivemap_oldhandler) + return GRUB_ERR_NONE; + +diff --git a/grub-core/disk/i386/pc/biosdisk.c b/grub-core/disk/i386/pc/biosdisk.c +index 81fd4e832..49e4e8a14 100644 +--- a/grub-core/disk/i386/pc/biosdisk.c ++++ b/grub-core/disk/i386/pc/biosdisk.c +@@ -367,7 +367,7 @@ grub_biosdisk_open (const char *name, grub_disk_t disk) + if (version) + { + struct grub_biosdisk_drp *drp +- = (struct grub_biosdisk_drp *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR; ++ = (struct grub_biosdisk_drp *) grub_absolute_pointer (GRUB_MEMORY_MACHINE_SCRATCH_ADDR); + + /* Clear out the DRP. */ + grub_memset (drp, 0, sizeof (*drp)); +@@ -654,7 +654,7 @@ grub_disk_biosdisk_fini (void) + GRUB_MOD_INIT(biosdisk) + { + struct grub_biosdisk_cdrp *cdrp +- = (struct grub_biosdisk_cdrp *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR; ++ = (struct grub_biosdisk_cdrp *) grub_absolute_pointer (GRUB_MEMORY_MACHINE_SCRATCH_ADDR); + grub_uint8_t boot_drive; + + if (grub_disk_firmware_is_tainted) +diff --git a/grub-core/fs/cbfs.c b/grub-core/fs/cbfs.c +index 581215ef1..8ab7106af 100644 +--- a/grub-core/fs/cbfs.c ++++ b/grub-core/fs/cbfs.c +@@ -342,7 +342,7 @@ init_cbfsdisk (void) + grub_uint32_t ptr; + struct cbfs_header *head; + +- ptr = *(grub_uint32_t *) 0xfffffffc; ++ ptr = *((grub_uint32_t *) grub_absolute_pointer (0xfffffffc)); + head = (struct cbfs_header *) (grub_addr_t) ptr; + grub_dprintf ("cbfs", "head=%p\n", head); + +diff --git a/grub-core/kern/i386/pc/acpi.c b/grub-core/kern/i386/pc/acpi.c +index 297f5d05f..0a69eba7b 100644 +--- a/grub-core/kern/i386/pc/acpi.c ++++ b/grub-core/kern/i386/pc/acpi.c +@@ -27,7 +27,7 @@ grub_machine_acpi_get_rsdpv1 (void) + grub_uint8_t *ebda, *ptr; + + grub_dprintf ("acpi", "Looking for RSDP. Scanning EBDA\n"); +- ebda = (grub_uint8_t *) ((* ((grub_uint16_t *) 0x40e)) << 4); ++ ebda = (grub_uint8_t *) ((* ((grub_uint16_t *) grub_absolute_pointer (0x40e))) << 4); + ebda_len = * (grub_uint16_t *) ebda; + if (! ebda_len) /* FIXME do we really need this check? */ + goto scan_bios; +@@ -55,7 +55,7 @@ grub_machine_acpi_get_rsdpv2 (void) + grub_uint8_t *ebda, *ptr; + + grub_dprintf ("acpi", "Looking for RSDP. Scanning EBDA\n"); +- ebda = (grub_uint8_t *) ((* ((grub_uint16_t *) 0x40e)) << 4); ++ ebda = (grub_uint8_t *) ((* ((grub_uint16_t *) grub_absolute_pointer (0x40e))) << 4); + ebda_len = * (grub_uint16_t *) ebda; + if (! ebda_len) /* FIXME do we really need this check? */ + goto scan_bios; +diff --git a/grub-core/kern/i386/pc/mmap.c b/grub-core/kern/i386/pc/mmap.c +index ef2faa2ab..53fcf45af 100644 +--- a/grub-core/kern/i386/pc/mmap.c ++++ b/grub-core/kern/i386/pc/mmap.c +@@ -143,7 +143,7 @@ grub_machine_mmap_iterate (grub_memory_hook_t hook, void *hook_data) + { + grub_uint32_t cont = 0; + struct grub_machine_mmap_entry *entry +- = (struct grub_machine_mmap_entry *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR; ++ = (struct grub_machine_mmap_entry *) grub_absolute_pointer (GRUB_MEMORY_MACHINE_SCRATCH_ADDR); + int e820_works = 0; + + while (1) +diff --git a/grub-core/loader/multiboot_mbi2.c b/grub-core/loader/multiboot_mbi2.c +index 6d680d671..00a48413c 100644 +--- a/grub-core/loader/multiboot_mbi2.c ++++ b/grub-core/loader/multiboot_mbi2.c +@@ -504,7 +504,7 @@ static void + fill_vbe_tag (struct multiboot_tag_vbe *tag) + { + grub_vbe_status_t status; +- void *scratch = (void *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR; ++ void *scratch = grub_absolute_pointer (GRUB_MEMORY_MACHINE_SCRATCH_ADDR); + + tag->type = MULTIBOOT_TAG_TYPE_VBE; + tag->size = 0; +@@ -577,7 +577,7 @@ retrieve_video_parameters (grub_properly_aligned_t **ptrorig) + #if defined (GRUB_MACHINE_PCBIOS) + { + grub_vbe_status_t status; +- void *scratch = (void *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR; ++ void *scratch = grub_absolute_pointer (GRUB_MEMORY_MACHINE_SCRATCH_ADDR); + status = grub_vbe_bios_get_mode (scratch); + vbe_mode = *(grub_uint32_t *) scratch; + if (status != GRUB_VBE_STATUS_OK) +diff --git a/grub-core/mmap/i386/pc/mmap.c b/grub-core/mmap/i386/pc/mmap.c +index 6ab4f6730..b9c5b0a00 100644 +--- a/grub-core/mmap/i386/pc/mmap.c ++++ b/grub-core/mmap/i386/pc/mmap.c +@@ -80,13 +80,13 @@ preboot (int noreturn __attribute__ ((unused))) + = min (grub_mmap_get_post64 (), 0xfc000000ULL) >> 16; + + /* Correct BDA. */ +- *((grub_uint16_t *) 0x413) = grub_mmap_get_lower () >> 10; ++ *((grub_uint16_t *) grub_absolute_pointer (0x413)) = grub_mmap_get_lower () >> 10; + + /* Save old interrupt handlers. */ +- grub_machine_mmaphook_int12offset = *((grub_uint16_t *) 0x48); +- grub_machine_mmaphook_int12segment = *((grub_uint16_t *) 0x4a); +- grub_machine_mmaphook_int15offset = *((grub_uint16_t *) 0x54); +- grub_machine_mmaphook_int15segment = *((grub_uint16_t *) 0x56); ++ grub_machine_mmaphook_int12offset = *((grub_uint16_t *) grub_absolute_pointer (0x48)); ++ grub_machine_mmaphook_int12segment = *((grub_uint16_t *) grub_absolute_pointer (0x4a)); ++ grub_machine_mmaphook_int15offset = *((grub_uint16_t *) grub_absolute_pointer (0x54)); ++ grub_machine_mmaphook_int15segment = *((grub_uint16_t *) grub_absolute_pointer (0x56)); + + grub_dprintf ("mmap", "hooktarget = %p\n", hooktarget); + +@@ -94,11 +94,11 @@ preboot (int noreturn __attribute__ ((unused))) + grub_memcpy (hooktarget, &grub_machine_mmaphook_start, + &grub_machine_mmaphook_end - &grub_machine_mmaphook_start); + +- *((grub_uint16_t *) 0x4a) = ((grub_addr_t) hooktarget) >> 4; +- *((grub_uint16_t *) 0x56) = ((grub_addr_t) hooktarget) >> 4; +- *((grub_uint16_t *) 0x48) = &grub_machine_mmaphook_int12 ++ *((grub_uint16_t *) grub_absolute_pointer (0x4a)) = ((grub_addr_t) hooktarget) >> 4; ++ *((grub_uint16_t *) grub_absolute_pointer (0x56)) = ((grub_addr_t) hooktarget) >> 4; ++ *((grub_uint16_t *) grub_absolute_pointer (0x48)) = &grub_machine_mmaphook_int12 + - &grub_machine_mmaphook_start; +- *((grub_uint16_t *) 0x54) = &grub_machine_mmaphook_int15 ++ *((grub_uint16_t *) grub_absolute_pointer (0x54)) = &grub_machine_mmaphook_int15 + - &grub_machine_mmaphook_start; + + return GRUB_ERR_NONE; +@@ -108,10 +108,10 @@ static grub_err_t + preboot_rest (void) + { + /* Restore old interrupt handlers. */ +- *((grub_uint16_t *) 0x48) = grub_machine_mmaphook_int12offset; +- *((grub_uint16_t *) 0x4a) = grub_machine_mmaphook_int12segment; +- *((grub_uint16_t *) 0x54) = grub_machine_mmaphook_int15offset; +- *((grub_uint16_t *) 0x56) = grub_machine_mmaphook_int15segment; ++ *((grub_uint16_t *) grub_absolute_pointer (0x48)) = grub_machine_mmaphook_int12offset; ++ *((grub_uint16_t *) grub_absolute_pointer (0x4a)) = grub_machine_mmaphook_int12segment; ++ *((grub_uint16_t *) grub_absolute_pointer (0x54)) = grub_machine_mmaphook_int15offset; ++ *((grub_uint16_t *) grub_absolute_pointer (0x56)) = grub_machine_mmaphook_int15segment; + + return GRUB_ERR_NONE; + } +diff --git a/grub-core/net/drivers/i386/pc/pxe.c b/grub-core/net/drivers/i386/pc/pxe.c +index 997010cf1..db17186ee 100644 +--- a/grub-core/net/drivers/i386/pc/pxe.c ++++ b/grub-core/net/drivers/i386/pc/pxe.c +@@ -174,7 +174,7 @@ grub_pxe_recv (struct grub_net_card *dev __attribute__ ((unused))) + grub_uint8_t *ptr, *end; + struct grub_net_buff *buf; + +- isr = (void *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR; ++ isr = (void *) grub_absolute_pointer (GRUB_MEMORY_MACHINE_SCRATCH_ADDR); + + if (!in_progress) + { +@@ -256,11 +256,11 @@ grub_pxe_send (struct grub_net_card *dev __attribute__ ((unused)), + struct grub_pxe_undi_tbd *tbd; + char *buf; + +- trans = (void *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR; ++ trans = (void *) grub_absolute_pointer (GRUB_MEMORY_MACHINE_SCRATCH_ADDR); + grub_memset (trans, 0, sizeof (*trans)); +- tbd = (void *) (GRUB_MEMORY_MACHINE_SCRATCH_ADDR + 128); ++ tbd = (void *) grub_absolute_pointer (GRUB_MEMORY_MACHINE_SCRATCH_ADDR + 128); + grub_memset (tbd, 0, sizeof (*tbd)); +- buf = (void *) (GRUB_MEMORY_MACHINE_SCRATCH_ADDR + 256); ++ buf = (void *) grub_absolute_pointer (GRUB_MEMORY_MACHINE_SCRATCH_ADDR + 256); + grub_memcpy (buf, pack->data, pack->tail - pack->data); + + trans->tbd = SEGOFS ((grub_addr_t) tbd); +@@ -287,7 +287,7 @@ static grub_err_t + grub_pxe_open (struct grub_net_card *dev __attribute__ ((unused))) + { + struct grub_pxe_undi_open *ou; +- ou = (void *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR; ++ ou = (void *) grub_absolute_pointer (GRUB_MEMORY_MACHINE_SCRATCH_ADDR); + grub_memset (ou, 0, sizeof (*ou)); + ou->pkt_filter = 4; + grub_pxe_call (GRUB_PXENV_UNDI_OPEN, ou, pxe_rm_entry); +@@ -382,7 +382,7 @@ GRUB_MOD_INIT(pxe) + if (! pxenv) + return; + +- ui = (void *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR; ++ ui = (void *) grub_absolute_pointer (GRUB_MEMORY_MACHINE_SCRATCH_ADDR); + grub_memset (ui, 0, sizeof (*ui)); + grub_pxe_call (GRUB_PXENV_UNDI_GET_INFORMATION, ui, pxe_rm_entry); + +diff --git a/grub-core/term/i386/pc/console.c b/grub-core/term/i386/pc/console.c +index d44937c30..9403390f1 100644 +--- a/grub-core/term/i386/pc/console.c ++++ b/grub-core/term/i386/pc/console.c +@@ -238,12 +238,11 @@ grub_console_getkey (struct grub_term_input *term __attribute__ ((unused))) + return (regs.eax & 0xff) + (('a' - 1) | GRUB_TERM_CTRL); + } + +-static const struct grub_machine_bios_data_area *bios_data_area = +- (struct grub_machine_bios_data_area *) GRUB_MEMORY_MACHINE_BIOS_DATA_AREA_ADDR; +- + static int + grub_console_getkeystatus (struct grub_term_input *term __attribute__ ((unused))) + { ++ const struct grub_machine_bios_data_area *bios_data_area = ++ (struct grub_machine_bios_data_area *) grub_absolute_pointer (GRUB_MEMORY_MACHINE_BIOS_DATA_AREA_ADDR); + /* conveniently GRUB keystatus is modelled after BIOS one. */ + return bios_data_area->keyboard_flag_lower & ~0x80; + } +diff --git a/grub-core/term/i386/pc/vga_text.c b/grub-core/term/i386/pc/vga_text.c +index 88fecc5ea..669d06fad 100644 +--- a/grub-core/term/i386/pc/vga_text.c ++++ b/grub-core/term/i386/pc/vga_text.c +@@ -45,15 +45,15 @@ GRUB_MOD_LICENSE ("GPLv3+"); + static struct grub_term_coordinate grub_curr_pos; + + #ifdef __mips__ +-#define VGA_TEXT_SCREEN ((grub_uint16_t *) 0xb00b8000) ++#define VGA_TEXT_SCREEN ((grub_uint16_t *) grub_absolute_pointer (0xb00b8000)) + #define cr_read grub_vga_cr_read + #define cr_write grub_vga_cr_write + #elif defined (MODE_MDA) +-#define VGA_TEXT_SCREEN ((grub_uint16_t *) 0xb0000) ++#define VGA_TEXT_SCREEN ((grub_uint16_t *) grub_absolute_pointer (0xb0000)) + #define cr_read grub_vga_cr_bw_read + #define cr_write grub_vga_cr_bw_write + #else +-#define VGA_TEXT_SCREEN ((grub_uint16_t *) 0xb8000) ++#define VGA_TEXT_SCREEN ((grub_uint16_t *) grub_absolute_pointer (0xb8000)) + #define cr_read grub_vga_cr_read + #define cr_write grub_vga_cr_write + #endif +diff --git a/grub-core/term/ns8250.c b/grub-core/term/ns8250.c +index 59801839b..83b25990c 100644 +--- a/grub-core/term/ns8250.c ++++ b/grub-core/term/ns8250.c +@@ -28,7 +28,6 @@ + + #ifdef GRUB_MACHINE_PCBIOS + #include <grub/machine/memory.h> +-static const unsigned short *serial_hw_io_addr = (const unsigned short *) GRUB_MEMORY_MACHINE_BIOS_DATA_AREA_ADDR; + #define GRUB_SERIAL_PORT_NUM 4 + #else + #include <grub/machine/serial.h> +@@ -237,6 +236,9 @@ static struct grub_serial_port com_ports[GRUB_SERIAL_PORT_NUM]; + void + grub_ns8250_init (void) + { ++#ifdef GRUB_MACHINE_PCBIOS ++ const unsigned short *serial_hw_io_addr = (const unsigned short *) grub_absolute_pointer (GRUB_MEMORY_MACHINE_BIOS_DATA_AREA_ADDR); ++#endif + unsigned i; + for (i = 0; i < GRUB_SERIAL_PORT_NUM; i++) + if (serial_hw_io_addr[i]) +@@ -272,6 +274,9 @@ grub_ns8250_init (void) + grub_port_t + grub_ns8250_hw_get_port (const unsigned int unit) + { ++#ifdef GRUB_MACHINE_PCBIOS ++ const unsigned short *serial_hw_io_addr = (const unsigned short *) grub_absolute_pointer (GRUB_MEMORY_MACHINE_BIOS_DATA_AREA_ADDR); ++#endif + if (unit < GRUB_SERIAL_PORT_NUM + && !(dead_ports & (1 << unit))) + return serial_hw_io_addr[unit]; +diff --git a/grub-core/video/i386/pc/vbe.c b/grub-core/video/i386/pc/vbe.c +index 0e65b5206..a0bb9af09 100644 +--- a/grub-core/video/i386/pc/vbe.c ++++ b/grub-core/video/i386/pc/vbe.c +@@ -514,7 +514,7 @@ grub_vbe_probe (struct grub_vbe_info_block *info_block) + + /* Use low memory scratch area as temporary storage + for VESA BIOS call. */ +- vbe_ib = (struct grub_vbe_info_block *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR; ++ vbe_ib = (struct grub_vbe_info_block *) grub_absolute_pointer (GRUB_MEMORY_MACHINE_SCRATCH_ADDR); + + /* Prepare info block. */ + grub_memset (vbe_ib, 0, sizeof (*vbe_ib)); +@@ -574,7 +574,7 @@ grub_vbe_get_preferred_mode (unsigned int *width, unsigned int *height) + + /* Use low memory scratch area as temporary storage for VESA BIOS calls. */ + flat_panel_info = (struct grub_vbe_flat_panel_info *) +- (GRUB_MEMORY_MACHINE_SCRATCH_ADDR + sizeof (struct grub_video_edid_info)); ++ grub_absolute_pointer (GRUB_MEMORY_MACHINE_SCRATCH_ADDR + sizeof (struct grub_video_edid_info)); + + if (controller_info.version >= 0x200 + && (grub_vbe_bios_get_ddc_capabilities (&ddc_level) & 0xff) +@@ -676,7 +676,7 @@ grub_vbe_set_video_mode (grub_uint32_t vbe_mode, + == GRUB_VBE_MEMORY_MODEL_PACKED_PIXEL) + { + struct grub_vbe_palette_data *palette +- = (struct grub_vbe_palette_data *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR; ++ = (struct grub_vbe_palette_data *) grub_absolute_pointer (GRUB_MEMORY_MACHINE_SCRATCH_ADDR); + unsigned i; + + /* Make sure that the BIOS can reach the palette. */ +diff --git a/include/grub/types.h b/include/grub/types.h +index 0a3ff1591..5ae0ced38 100644 +--- a/include/grub/types.h ++++ b/include/grub/types.h +@@ -340,4 +340,28 @@ static inline void grub_set_unaligned64 (void *ptr, grub_uint64_t val) + dd->d = val; + } + ++/* ++ * The grub_absolute_pointer() macro borrows the idea from Linux kernel of using ++ * RELOC_HIDE() macro to stop GCC from checking the result of pointer arithmetic ++ * and also it's conversion to be inside the symbol's boundary [1]. The check ++ * is sometimes false positive, especially it is controversial to emit the array ++ * bounds [-Warray-bounds] warning on all hardwired literal pointers since GCC ++ * 11/12 [2]. Unless a good solution can be settled, for the time being we ++ * would be in favor of the macro instead of GCC pragmas which cannot match the ++ * places the warning needs to be ignored in an exact way. ++ * ++ * [1] https://lists.linuxcoding.com/kernel/2006-q3/msg17979.html ++ * [2] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99578 ++ */ ++#if defined(__GNUC__) ++# define grub_absolute_pointer(val) \ ++({ \ ++ grub_addr_t __ptr; \ ++ asm ("" : "=r" (__ptr) : "0" ((void *) (val))); \ ++ (void *) (__ptr); \ ++}) ++#else ++# define grub_absolute_pointer(val) ((void *) (val)) ++#endif ++ + #endif /* ! GRUB_TYPES_HEADER */ +diff --git a/grub-core/loader/i386/multiboot_mbi.c b/grub-core/loader/i386/multiboot_mbi.c +index a67d9d0a8..434e694ff 100644 +--- a/grub-core/loader/i386/multiboot_mbi.c ++++ b/grub-core/loader/i386/multiboot_mbi.c +@@ -293,7 +293,7 @@ fill_vbe_info (struct multiboot_info *mbi, grub_uint8_t *ptrorig, + struct grub_vbe_mode_info_block *mode_info; + #if GRUB_MACHINE_HAS_VBE + grub_vbe_status_t status; +- void *scratch = (void *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR; ++ void *scratch = grub_absolute_pointer (GRUB_MEMORY_MACHINE_SCRATCH_ADDR); + + status = grub_vbe_bios_get_controller_info (scratch); + if (status != GRUB_VBE_STATUS_OK) +diff --git a/grub-core/commands/i386/pc/sendkey.c b/grub-core/commands/i386/pc/sendkey.c +index 26d9acd3d..9fbd8cb2c 100644 +--- a/grub-core/commands/i386/pc/sendkey.c ++++ b/grub-core/commands/i386/pc/sendkey.c +@@ -216,12 +216,12 @@ static grub_err_t + grub_sendkey_postboot (void) + { + /* For convention: pointer to flags. */ +- grub_uint32_t *flags = (grub_uint32_t *) 0x417; ++ grub_uint32_t *flags = grub_absolute_pointer (0x417); + + *flags = oldflags; + +- *((char *) 0x41a) = 0x1e; +- *((char *) 0x41c) = 0x1e; ++ *((volatile char *) grub_absolute_pointer (0x41a)) = 0x1e; ++ *((volatile char *) grub_absolute_pointer (0x41c)) = 0x1e; + + return GRUB_ERR_NONE; + } +@@ -231,13 +231,13 @@ static grub_err_t + grub_sendkey_preboot (int noret __attribute__ ((unused))) + { + /* For convention: pointer to flags. */ +- grub_uint32_t *flags = (grub_uint32_t *) 0x417; ++ grub_uint32_t *flags = grub_absolute_pointer (0x417); + + oldflags = *flags; + + /* Set the sendkey. */ +- *((char *) 0x41a) = 0x1e; +- *((char *) 0x41c) = keylen + 0x1e; ++ *((volatile char *) grub_absolute_pointer (0x41a)) = 0x1e; ++ *((volatile char *) grub_absolute_pointer (0x41c)) = keylen + 0x1e; + grub_memcpy ((char *) 0x41e, sendkey, 0x20); + + /* Transform "any ctrl" to "right ctrl" flag. */ |