@@ -1673,6 +1673,12 @@
#endif
+/* Define if your linker supports emulation avrxmega2_flmap. */
+#ifndef USED_FOR_TARGET
+#undef HAVE_LD_AVR_AVRXMEGA2_FLMAP
+#endif
+
+
/* Define if your default avr linker script for avrxmega3 leaves .rodata in
flash. */
#ifndef USED_FOR_TARGET
@@ -1680,6 +1686,12 @@
#endif
+/* Define if your linker supports emulation avrxmega4_flmap. */
+#ifndef USED_FOR_TARGET
+#undef HAVE_LD_AVR_AVRXMEGA4_FLMAP
+#endif
+
+
/* Define if your linker supports -z bndplt */
#ifndef USED_FOR_TARGET
#undef HAVE_LD_BNDPLT_SUPPORT
@@ -166,7 +166,35 @@ AVR_ISA_RCALL
assume these instructions are not available and we set the built-in
macro __AVR_HAVE_JMP_CALL__ accordingly. This macro is used to
determine a rough estimate of flash size in libgcc, and AVR-LibC uses
- this macro to determine vector sizes. */
+ this macro to determine vector sizes.
+
+AVR_ISA_FLMAP
+ The device has the NVMCTRL_CTRLB.FLMAP bitfield. The value of FLMAP
+ determines which 32 KiB segment of the program memory (flash) is visible
+ in the RAM address space at 0x8000.
+
+ If Binutils support emulations avrxmega2_flmap resp. avrxmega4_flmap
+ (PR31124), then the location of the .rodata section can be determined
+ by means of option -m[no-]rodata-in-ram. If .rodata is located in flash,
+ the user can chose which 32 KiB flash block is visible in RAM space by
+ means of defining symbol __flmap.
+
+ The startup code from AVR-LibC initializes FLMAP according to __flmap
+ provided one of the avrxmega*_flmap emulations is used. If avrxmega2/4
+ is used, then the startup code does not initialize FLMAP.
+
+ __AVR_HAVE_FLMAP__ is a macro defined in device-specs and supposed to be
+ consumed by code that sets FLMAP, like the startup code for example.
+ The macro is defined when all of the following conditions are met:
+ * The device is AVR_ISA_FLMAP.
+ * It's not known at compile time / assembler time whether or not .rodata
+ will be located in flash or in RAM. This implies Binutils PR31124.
+ * The definition of the macro is independent of -m[no-]rodata-in-ram.
+
+ AVR_ISA_FLMAP does not affect multilib layout or selection in any way.
+
+ For details on which symbols are defined in which way depending on the
+ emulation, see <Binutils>/ld/scripttempl/avr.sc. */
enum avr_device_specific_features
{
@@ -175,9 +203,12 @@ enum avr_device_specific_features
AVR_SHORT_SP = 0x2, /* Stack Pointer has 8 bits width. */
AVR_ERRATA_SKIP = 0x4, /* device has a core erratum. */
AVR_ISA_LDS = 0x8, /* whether LDS / STS is valid for all data in static
- storage. Only useful for reduced Tiny. */
- AVR_ISA_RCALL = 0x10 /* Use RJMP / RCALL even though JMP / CALL
- are available (-mshort-calls). */
+ storage. Only useful for reduced Tiny. */
+ AVR_ISA_RCALL = 0x10, /* Use RJMP / RCALL even though JMP / CALL
+ are available (-mshort-calls). */
+ AVR_ISA_FLMAP = 0x20 /* Has NVMCTRL_CTRLB.FLMAP to select which 32 KiB
+ block of program memory is visible in the RAM
+ address space. */
};
/* Map architecture to its texinfo string. */
@@ -306,21 +306,21 @@ AVR_MCU ("atxmega16c4", ARCH_AVRXMEGA2, AVR_ISA_RMW, "__AVR_ATxmega16C4__"
AVR_MCU ("atxmega32a4u", ARCH_AVRXMEGA2, AVR_ISA_RMW, "__AVR_ATxmega32A4U__", 0x2000, 0x0, 0x9000, 0)
AVR_MCU ("atxmega32c4", ARCH_AVRXMEGA2, AVR_ISA_RMW, "__AVR_ATxmega32C4__", 0x2000, 0x0, 0x9000, 0)
AVR_MCU ("atxmega32e5", ARCH_AVRXMEGA2, AVR_ISA_NONE, "__AVR_ATxmega32E5__", 0x2000, 0x0, 0x9000, 0)
-AVR_MCU ("avr64da28", ARCH_AVRXMEGA2, AVR_ISA_NONE, "__AVR_AVR64DA28__", 0x6000, 0x0, 0x10000, 0)
-AVR_MCU ("avr64da32", ARCH_AVRXMEGA2, AVR_ISA_NONE, "__AVR_AVR64DA32__", 0x6000, 0x0, 0x10000, 0)
-AVR_MCU ("avr64da48", ARCH_AVRXMEGA2, AVR_ISA_NONE, "__AVR_AVR64DA48__", 0x6000, 0x0, 0x10000, 0)
-AVR_MCU ("avr64da64", ARCH_AVRXMEGA2, AVR_ISA_NONE, "__AVR_AVR64DA64__", 0x6000, 0x0, 0x10000, 0)
-AVR_MCU ("avr64db28", ARCH_AVRXMEGA2, AVR_ISA_NONE, "__AVR_AVR64DB28__", 0x6000, 0x0, 0x10000, 0)
-AVR_MCU ("avr64db32", ARCH_AVRXMEGA2, AVR_ISA_NONE, "__AVR_AVR64DB32__", 0x6000, 0x0, 0x10000, 0)
-AVR_MCU ("avr64db48", ARCH_AVRXMEGA2, AVR_ISA_NONE, "__AVR_AVR64DB48__", 0x6000, 0x0, 0x10000, 0)
-AVR_MCU ("avr64db64", ARCH_AVRXMEGA2, AVR_ISA_NONE, "__AVR_AVR64DB64__", 0x6000, 0x0, 0x10000, 0)
-AVR_MCU ("avr64dd14", ARCH_AVRXMEGA2, AVR_ISA_NONE, "__AVR_AVR64DD14__", 0x6000, 0x0, 0x10000, 0)
-AVR_MCU ("avr64dd20", ARCH_AVRXMEGA2, AVR_ISA_NONE, "__AVR_AVR64DD20__", 0x6000, 0x0, 0x10000, 0)
-AVR_MCU ("avr64dd28", ARCH_AVRXMEGA2, AVR_ISA_NONE, "__AVR_AVR64DD28__", 0x6000, 0x0, 0x10000, 0)
-AVR_MCU ("avr64dd32", ARCH_AVRXMEGA2, AVR_ISA_NONE, "__AVR_AVR64DD32__", 0x6000, 0x0, 0x10000, 0)
-AVR_MCU ("avr64ea28", ARCH_AVRXMEGA2, AVR_ISA_NONE, "__AVR_AVR64EA28__", 0x6800, 0x0, 0x10000, 0)
-AVR_MCU ("avr64ea32", ARCH_AVRXMEGA2, AVR_ISA_NONE, "__AVR_AVR64EA32__", 0x6800, 0x0, 0x10000, 0)
-AVR_MCU ("avr64ea48", ARCH_AVRXMEGA2, AVR_ISA_NONE, "__AVR_AVR64EA48__", 0x6800, 0x0, 0x10000, 0)
+AVR_MCU ("avr64da28", ARCH_AVRXMEGA2, AVR_ISA_FLMAP, "__AVR_AVR64DA28__", 0x6000, 0x0, 0x10000, 0)
+AVR_MCU ("avr64da32", ARCH_AVRXMEGA2, AVR_ISA_FLMAP, "__AVR_AVR64DA32__", 0x6000, 0x0, 0x10000, 0)
+AVR_MCU ("avr64da48", ARCH_AVRXMEGA2, AVR_ISA_FLMAP, "__AVR_AVR64DA48__", 0x6000, 0x0, 0x10000, 0)
+AVR_MCU ("avr64da64", ARCH_AVRXMEGA2, AVR_ISA_FLMAP, "__AVR_AVR64DA64__", 0x6000, 0x0, 0x10000, 0)
+AVR_MCU ("avr64db28", ARCH_AVRXMEGA2, AVR_ISA_FLMAP, "__AVR_AVR64DB28__", 0x6000, 0x0, 0x10000, 0)
+AVR_MCU ("avr64db32", ARCH_AVRXMEGA2, AVR_ISA_FLMAP, "__AVR_AVR64DB32__", 0x6000, 0x0, 0x10000, 0)
+AVR_MCU ("avr64db48", ARCH_AVRXMEGA2, AVR_ISA_FLMAP, "__AVR_AVR64DB48__", 0x6000, 0x0, 0x10000, 0)
+AVR_MCU ("avr64db64", ARCH_AVRXMEGA2, AVR_ISA_FLMAP, "__AVR_AVR64DB64__", 0x6000, 0x0, 0x10000, 0)
+AVR_MCU ("avr64dd14", ARCH_AVRXMEGA2, AVR_ISA_FLMAP, "__AVR_AVR64DD14__", 0x6000, 0x0, 0x10000, 0)
+AVR_MCU ("avr64dd20", ARCH_AVRXMEGA2, AVR_ISA_FLMAP, "__AVR_AVR64DD20__", 0x6000, 0x0, 0x10000, 0)
+AVR_MCU ("avr64dd28", ARCH_AVRXMEGA2, AVR_ISA_FLMAP, "__AVR_AVR64DD28__", 0x6000, 0x0, 0x10000, 0)
+AVR_MCU ("avr64dd32", ARCH_AVRXMEGA2, AVR_ISA_FLMAP, "__AVR_AVR64DD32__", 0x6000, 0x0, 0x10000, 0)
+AVR_MCU ("avr64ea28", ARCH_AVRXMEGA2, AVR_ISA_FLMAP, "__AVR_AVR64EA28__", 0x6800, 0x0, 0x10000, 0)
+AVR_MCU ("avr64ea32", ARCH_AVRXMEGA2, AVR_ISA_FLMAP, "__AVR_AVR64EA32__", 0x6800, 0x0, 0x10000, 0)
+AVR_MCU ("avr64ea48", ARCH_AVRXMEGA2, AVR_ISA_FLMAP, "__AVR_AVR64EA48__", 0x6800, 0x0, 0x10000, 0)
/* Xmega, Flash + RAM < 64K, flash visible in RAM address space */
AVR_MCU ("avrxmega3", ARCH_AVRXMEGA3, AVR_ISA_NONE, NULL, 0x3f00, 0x0, 0x8000, 0)
AVR_MCU ("attiny202", ARCH_AVRXMEGA3, AVR_ISA_RCALL, "__AVR_ATtiny202__", 0x3f80, 0x0, 0x800, 0x8000)
@@ -393,14 +393,14 @@ AVR_MCU ("atxmega64b1", ARCH_AVRXMEGA4, AVR_ISA_RMW, "__AVR_ATxmega64B1__"
AVR_MCU ("atxmega64b3", ARCH_AVRXMEGA4, AVR_ISA_RMW, "__AVR_ATxmega64B3__", 0x2000, 0x0, 0x11000, 0)
AVR_MCU ("atxmega64c3", ARCH_AVRXMEGA4, AVR_ISA_RMW, "__AVR_ATxmega64C3__", 0x2000, 0x0, 0x11000, 0)
AVR_MCU ("atxmega64d4", ARCH_AVRXMEGA4, AVR_ISA_NONE, "__AVR_ATxmega64D4__", 0x2000, 0x0, 0x11000, 0)
-AVR_MCU ("avr128da28", ARCH_AVRXMEGA4, AVR_ISA_NONE, "__AVR_AVR128DA28__", 0x4000, 0x0, 0x20000, 0)
-AVR_MCU ("avr128da32", ARCH_AVRXMEGA4, AVR_ISA_NONE, "__AVR_AVR128DA32__", 0x4000, 0x0, 0x20000, 0)
-AVR_MCU ("avr128da48", ARCH_AVRXMEGA4, AVR_ISA_NONE, "__AVR_AVR128DA48__", 0x4000, 0x0, 0x20000, 0)
-AVR_MCU ("avr128da64", ARCH_AVRXMEGA4, AVR_ISA_NONE, "__AVR_AVR128DA64__", 0x4000, 0x0, 0x20000, 0)
-AVR_MCU ("avr128db28", ARCH_AVRXMEGA4, AVR_ISA_NONE, "__AVR_AVR128DB28__", 0x4000, 0x0, 0x20000, 0)
-AVR_MCU ("avr128db32", ARCH_AVRXMEGA4, AVR_ISA_NONE, "__AVR_AVR128DB32__", 0x4000, 0x0, 0x20000, 0)
-AVR_MCU ("avr128db48", ARCH_AVRXMEGA4, AVR_ISA_NONE, "__AVR_AVR128DB48__", 0x4000, 0x0, 0x20000, 0)
-AVR_MCU ("avr128db64", ARCH_AVRXMEGA4, AVR_ISA_NONE, "__AVR_AVR128DB64__", 0x4000, 0x0, 0x20000, 0)
+AVR_MCU ("avr128da28", ARCH_AVRXMEGA4, AVR_ISA_FLMAP, "__AVR_AVR128DA28__", 0x4000, 0x0, 0x20000, 0)
+AVR_MCU ("avr128da32", ARCH_AVRXMEGA4, AVR_ISA_FLMAP, "__AVR_AVR128DA32__", 0x4000, 0x0, 0x20000, 0)
+AVR_MCU ("avr128da48", ARCH_AVRXMEGA4, AVR_ISA_FLMAP, "__AVR_AVR128DA48__", 0x4000, 0x0, 0x20000, 0)
+AVR_MCU ("avr128da64", ARCH_AVRXMEGA4, AVR_ISA_FLMAP, "__AVR_AVR128DA64__", 0x4000, 0x0, 0x20000, 0)
+AVR_MCU ("avr128db28", ARCH_AVRXMEGA4, AVR_ISA_FLMAP, "__AVR_AVR128DB28__", 0x4000, 0x0, 0x20000, 0)
+AVR_MCU ("avr128db32", ARCH_AVRXMEGA4, AVR_ISA_FLMAP, "__AVR_AVR128DB32__", 0x4000, 0x0, 0x20000, 0)
+AVR_MCU ("avr128db48", ARCH_AVRXMEGA4, AVR_ISA_FLMAP, "__AVR_AVR128DB48__", 0x4000, 0x0, 0x20000, 0)
+AVR_MCU ("avr128db64", ARCH_AVRXMEGA4, AVR_ISA_FLMAP, "__AVR_AVR128DB64__", 0x4000, 0x0, 0x20000, 0)
/* Xmega, 64K < Flash <= 128K, RAM > 64K */
AVR_MCU ("avrxmega5", ARCH_AVRXMEGA5, AVR_ISA_NONE, NULL, 0x2000, 0x0, 0x11000, 0)
AVR_MCU ("atxmega64a1", ARCH_AVRXMEGA5, AVR_ISA_NONE, "__AVR_ATxmega64A1__", 0x2000, 0x0, 0x11000, 0)
@@ -220,6 +220,7 @@ static GTY(()) rtx xstring_e;
/* Current architecture. */
const avr_arch_t *avr_arch;
+enum avr_arch_id avr_arch_index;
/* Unnamed sections associated to __attribute__((progmem)) aka. PROGMEM
or to address space __flash* or __memx. Only used as singletons inside
@@ -229,9 +230,10 @@ static GTY(()) section *progmem_section[ADDR_SPACE_COUNT];
/* Condition for insns/expanders from avr-dimode.md. */
bool avr_have_dimode = true;
-/* To track if code will use .bss and/or .data. */
+/* To track if code will use .bss, .data, .rodata. */
bool avr_need_clear_bss_p = false;
bool avr_need_copy_data_p = false;
+bool avr_has_rodata_p = false;
/* Transform UP into lowercase and write the result to LO.
@@ -1059,6 +1061,7 @@ avr_set_core_architecture (void)
&& mcu->macro == NULL)
{
avr_arch = &avr_arch_types[mcu->arch_id];
+ avr_arch_index = mcu->arch_id;
if (avr_n_flash < 0)
avr_n_flash = 1 + (mcu->flash_size - 1) / 0x10000;
@@ -10740,6 +10743,49 @@ avr_insert_attributes (tree node, tree *attributes)
}
}
+#ifdef HAVE_LD_AVR_AVRXMEGA2_FLMAP
+static const bool have_avrxmega2_flmap = true;
+#else
+static const bool have_avrxmega2_flmap = false;
+#endif
+
+#ifdef HAVE_LD_AVR_AVRXMEGA4_FLMAP
+static const bool have_avrxmega4_flmap = true;
+#else
+static const bool have_avrxmega4_flmap = false;
+#endif
+
+#ifdef HAVE_LD_AVR_AVRXMEGA3_RODATA_IN_FLASH
+static const bool have_avrxmega3_rodata_in_flash = true;
+#else
+static const bool have_avrxmega3_rodata_in_flash = false;
+#endif
+
+
+static bool
+avr_rodata_in_flash_p ()
+{
+ switch (avr_arch_index)
+ {
+ default:
+ break;
+
+ case ARCH_AVRTINY:
+ return true;
+
+ case ARCH_AVRXMEGA3:
+ return have_avrxmega3_rodata_in_flash;
+
+ case ARCH_AVRXMEGA2:
+ return avr_flmap && have_avrxmega2_flmap && avr_rodata_in_ram != 1;
+
+ case ARCH_AVRXMEGA4:
+ return avr_flmap && have_avrxmega4_flmap && avr_rodata_in_ram != 1;
+ }
+
+ return false;
+}
+
/* Implement `ASM_OUTPUT_ALIGNED_DECL_LOCAL'. */
/* Implement `ASM_OUTPUT_ALIGNED_DECL_COMMON'. */
@@ -10853,13 +10899,11 @@ avr_output_progmem_section_asm_op (const char *data)
static void
avr_asm_init_sections (void)
{
- /* Override section callbacks to keep track of `avr_need_clear_bss_p'
- resp. `avr_need_copy_data_p'. If flash is not mapped to RAM then
- we have also to track .rodata because it is located in RAM then. */
+ /* Override section callbacks to keep track of `avr_need_clear_bss_p',
+ `avr_need_copy_data_p' and `avr_has_rodata_p'.
+ Track also .rodata for the case when .rodata is located in RAM. */
-#if defined HAVE_LD_AVR_AVRXMEGA3_RODATA_IN_FLASH
- if (avr_arch->flash_pm_offset == 0)
-#endif
+ if (! avr_rodata_in_flash_p ())
readonly_data_section->unnamed.callback = avr_output_data_section_asm_op;
data_section->unnamed.callback = avr_output_data_section_asm_op;
bss_section->unnamed.callback = avr_output_bss_section_asm_op;
@@ -10899,13 +10943,9 @@ avr_asm_named_section (const char *name, unsigned int flags, tree decl)
avr_need_copy_data_p = (startswith (name, ".data")
|| startswith (name, ".gnu.linkonce.d"));
- if (!avr_need_copy_data_p
-#if defined HAVE_LD_AVR_AVRXMEGA3_RODATA_IN_FLASH
- && avr_arch->flash_pm_offset == 0
-#endif
- )
- avr_need_copy_data_p = (startswith (name, ".rodata")
- || startswith (name, ".gnu.linkonce.r"));
+ if (!avr_has_rodata_p)
+ avr_has_rodata_p = (startswith (name, ".rodata")
+ || startswith (name, ".gnu.linkonce.r"));
if (!avr_need_clear_bss_p)
avr_need_clear_bss_p = startswith (name, ".bss");
@@ -11203,7 +11243,8 @@ avr_file_end (void)
linking in the initialization code from libgcc if resp.
sections are empty, see PR18145. */
- if (avr_need_copy_data_p)
+ if (avr_need_copy_data_p
+ || (avr_has_rodata_p && ! avr_rodata_in_flash_p ()))
fputs (".global __do_copy_data\n", asm_out_file);
if (avr_need_clear_bss_p)
@@ -94,6 +94,14 @@ mstrict-X
Target Var(avr_strict_X) Init(0)
When accessing RAM, use X as imposed by the hardware, i.e. just use pre-decrement, post-increment and indirect addressing with the X register. Without this option, the compiler may assume that there is an addressing mode X+const similar to Y+const and Z+const and emit instructions to emulate such an addressing mode for X.
+mflmap
+Target Var(avr_flmap) Init(0)
+The device has the bitfield NVMCTRL_CTRLB.FLMAP. This option is used internally.
+
+mrodata-in-ram
+Target Var(avr_rodata_in_ram) Init(-1)
+The device has the .rodata section located in the RAM area.
+
;; For rationale behind -msp8 see explanation in avr.h.
msp8
Target RejectNegative Var(avr_sp8) Init(0)
@@ -103,6 +103,61 @@ static const char help_dev_lib_name[] =
"\n";
#endif // WITH_AVRLIBC
+
+#ifdef HAVE_LD_AVR_AVRXMEGA2_FLMAP
+static const bool have_avrxmega2_flmap = true;
+#else
+static const bool have_avrxmega2_flmap = false;
+#endif
+
+#ifdef HAVE_LD_AVR_AVRXMEGA4_FLMAP
+static const bool have_avrxmega4_flmap = true;
+#else
+static const bool have_avrxmega4_flmap = false;
+#endif
+
+#ifdef HAVE_LD_AVR_AVRXMEGA3_RODATA_IN_FLASH
+static const bool have_avrxmega3_rodata_in_flash = true;
+#else
+static const bool have_avrxmega3_rodata_in_flash = false;
+#endif
+
+
+static void
+diagnose_mrodata_in_ram (FILE *f, const char *spec, const avr_mcu_t *mcu)
+{
+ enum avr_arch_id arch_id = mcu->arch_id;
+ const avr_arch_t *arch = &avr_arch_types[arch_id];
+ const bool is_arch = mcu->macro == NULL;
+ const bool flmap = (mcu->dev_attribute & AVR_ISA_FLMAP);
+ const bool have_flmap2 = have_avrxmega2_flmap && arch_id == ARCH_AVRXMEGA2;
+ const bool have_flmap4 = have_avrxmega4_flmap && arch_id == ARCH_AVRXMEGA4;
+ const bool have_flmap = flmap && (have_flmap2 || have_flmap4);
+
+ const bool rodata_in_flash = (arch_id == ARCH_AVRTINY
+ || (arch_id == ARCH_AVRXMEGA3
+ && have_avrxmega3_rodata_in_flash));
+
+ fprintf (f, "%s:\n", spec);
+ if (rodata_in_flash && is_arch)
+ fprintf (f, "\t%%{mrodata-in-ram: %%e-mrodata-in-ram not supported"
+ " for %s}", mcu->name);
+ else if (rodata_in_flash)
+ fprintf (f, "\t%%{mrodata-in-ram: %%e-mrodata-in-ram not supported"
+ " for %s (arch=%s)}", mcu->name, arch->name);
+ else if (is_arch)
+ {
+ if (! have_flmap2 && ! have_flmap4)
+ fprintf (f, "\t%%{mno-rodata-in-ram: %%e-mno-rodata-in-ram not"
+ " supported for %s}", mcu->name);
+ }
+ else if (! have_flmap)
+ fprintf (f, "\t%%{mno-rodata-in-ram: %%e-mno-rodata-in-ram not supported"
+ " for %s (arch=%s)}", mcu->name, arch->name);
+ fprintf (f, "\n\n");
+}
+
+
static void
print_mcu (const avr_mcu_t *mcu)
{
@@ -130,6 +185,7 @@ print_mcu (const avr_mcu_t *mcu)
bool rmw = (mcu->dev_attribute & AVR_ISA_RMW) != 0;
bool sp8 = (mcu->dev_attribute & AVR_SHORT_SP) != 0;
bool rcall = (mcu->dev_attribute & AVR_ISA_RCALL);
+ bool flmap = (mcu->dev_attribute & AVR_ISA_FLMAP);
bool is_arch = mcu->macro == NULL;
bool is_device = ! is_arch;
int flash_pm_offset = 0;
@@ -166,13 +222,24 @@ print_mcu (const avr_mcu_t *mcu)
rcall_spec = rcall ? "-mshort-calls" : "%<mshort-calls";
}
+ const char *flmap_spec = flmap ? "-mflmap" : "%<mflmap";
+ const char *link_arch_spec = "%{mmcu=*:-m%*}";
+ const char *link_arch_flmap_spec = "%{mmcu=*:-m%*%{!mrodata-in-ram:_flmap}}";
+ const bool have_flmap2 = have_avrxmega2_flmap && arch_id == ARCH_AVRXMEGA2;
+ const bool have_flmap4 = have_avrxmega4_flmap && arch_id == ARCH_AVRXMEGA4;
+ const bool have_flmap = flmap && (have_flmap2 || have_flmap4);
+
+ if (have_flmap)
+ link_arch_spec = link_arch_flmap_spec;
+
fprintf (f, "#\n"
"# Auto-generated specs for AVR ");
if (is_arch)
fprintf (f, "core architecture %s\n", arch->name);
else
- fprintf (f, "device %s (core %s, %d-bit SP%s)\n", mcu->name,
- arch->name, sp8 ? 8 : 16, rcall ? ", short-calls" : "");
+ fprintf (f, "device %s (core %s, %d-bit SP%s%s)\n", mcu->name,
+ arch->name, sp8 ? 8 : 16, rcall ? ", short-calls" : "",
+ have_flmap ? ", FLMAP" : "");
fprintf (f, "%s\n", header);
if (is_device)
@@ -212,6 +279,11 @@ print_mcu (const avr_mcu_t *mcu)
? "\t%{!mno-absdata: -mabsdata}"
: "\t%{mabsdata}");
+ // -m[no-]rodata-in-ram basically affects linking, but sanity-check early.
+ diagnose_mrodata_in_ram (f, "*cc1_rodata_in_ram", mcu);
+
+ fprintf (f, "*cc1_misc:\n\t%%(cc1_rodata_in_ram)\n\n");
+
// avr-gcc specific specs for assembling / the assembler.
fprintf (f, "*asm_arch:\n\t-mmcu=%s\n\n", arch->name);
@@ -235,6 +307,8 @@ print_mcu (const avr_mcu_t *mcu)
? "\t%{mno-skip-bug}"
: "\t%{!mskip-bug: -mno-skip-bug}");
+ fprintf (f, "*asm_misc:\n" /* empty */ "\n\n");
+
// avr-specific specs for linking / the linker.
int wrap_k =
@@ -253,7 +327,10 @@ print_mcu (const avr_mcu_t *mcu)
fprintf (f, "*link_relax:\n\t%s\n\n", LINK_RELAX_SPEC);
- fprintf (f, "*link_arch:\n\t%s", LINK_ARCH_SPEC);
+ // -m[no-]rodata-in-ram affects linking. Sanity check its usage.
+ diagnose_mrodata_in_ram (f, "*link_rodata_in_ram", mcu);
+
+ fprintf (f, "*link_arch:\n\t%s", link_arch_spec);
if (is_device
&& flash_pm_offset)
fprintf (f, " --defsym=__RODATA_PM_OFFSET__=0x%x", flash_pm_offset);
@@ -274,12 +351,15 @@ print_mcu (const avr_mcu_t *mcu)
fprintf (f, "\n\n");
}
+ fprintf (f, "*link_misc:\n\t%%(link_rodata_in_ram)\n\n");
+
// Specs known to GCC.
if (is_device)
{
fprintf (f, "*self_spec:\n");
fprintf (f, "\t%%<mmcu=* -mmcu=%s ", arch->name);
+ fprintf (f, "%s ", flmap_spec);
fprintf (f, "%s ", rcall_spec);
fprintf (f, "%s\n\n", sp8_spec);
@@ -298,10 +378,26 @@ print_mcu (const avr_mcu_t *mcu)
fprintf (f, " -U__AVR_PM_BASE_ADDRESS__");
fprintf (f, " -D__AVR_PM_BASE_ADDRESS__=0x%x", flash_pm_offset);
}
+ if (have_flmap)
+ fprintf (f, " -D__AVR_HAVE_FLMAP__");
+
+ fprintf (f, "\n\n"); // *cpp_mcu
+
+ const bool rodata_in_flash = (arch_id == ARCH_AVRTINY
+ || (arch_id == ARCH_AVRXMEGA3
+ && have_avrxmega3_rodata_in_flash));
+ fprintf (f, "*cpp_rodata_in_ram:\n\t-D__AVR_RODATA_IN_RAM__=");
+ if (rodata_in_flash)
+ fprintf (f, "0");
+ else if (! have_flmap)
+ fprintf (f, "1");
+ else
+ fprintf (f, "%%{!mrodata-in-ram:%%{!mno-rodata-in-ram:0}}"
+ "%%{mrodata-in-ram:1}" "%%{mno-rodata-in-ram:0}");
fprintf (f, "\n\n");
fprintf (f, "*cpp:\n");
- fprintf (f, "\t%%(cpp_mcu)");
+ fprintf (f, "\t%%(cpp_mcu) %%(cpp_rodata_in_ram)");
#if defined (WITH_AVRLIBC)
fprintf (f, " %%(cpp_avrlibc)");
#endif // WITH_AVRLIBC
@@ -189,7 +189,8 @@ int main (void)
for (i = 0; i < ARRAY_SIZE (avr_texinfo); i++)
if (arch_id == avr_texinfo[i].arch_id)
- printf ("@item %s\n%s\n", mcu->name, avr_texinfo[i].texinfo);
+ printf ("@item @anchor{%s}%s\n%s\n", mcu->name, mcu->name,
+ avr_texinfo[i].texinfo);
}
else if (arch_id == (enum avr_arch_id) mcu->arch_id)
{
@@ -35,7 +35,8 @@ along with GCC; see the file COPYING3. If not see
"%(cc1_n_flash) " \
"%(cc1_errata_skip) " \
"%(cc1_rmw) " \
- "%(cc1_absdata) "
+ "%(cc1_absdata) " \
+ "%(cc1_misc) "
#undef CC1PLUS_SPEC
#define CC1PLUS_SPEC \
@@ -53,10 +54,8 @@ along with GCC; see the file COPYING3. If not see
"%(asm_relax) " \
"%(asm_rmw) " \
"%(asm_gccisr) " \
- "%(asm_errata_skip) "
-
-#define LINK_ARCH_SPEC \
- "%{mmcu=*:-m%*} "
+ "%(asm_errata_skip) " \
+ "%(asm_misc) "
#define LINK_RELAX_SPEC \
"%{mrelax:--relax} "
@@ -68,6 +67,7 @@ along with GCC; see the file COPYING3. If not see
"%(link_text_start) " \
"%(link_relax) " \
"%(link_pmem_wrap) " \
+ "%(link_misc) " \
"%{shared:%eshared is not supported} "
#undef LIB_SPEC
@@ -28455,6 +28455,7 @@ $as_echo "#define HAVE_AS_AVR_MGCCISR_OPTION 1" >>confdefs.h
fi
+ avr_ld_ver="`$gcc_cv_ld -v | sed -e 's:^.* ::'`"
# Check how default linker description file implements .rodata for
# avrxmega3 (PR21472). avr-gcc assumes .rodata is *not* loaded to
# RAM so avr-gcc skips __do_copy_data for .rodata objects.
@@ -28499,7 +28500,6 @@ $as_echo "#define HAVE_LD_AVR_AVRXMEGA3_RODATA_IN_FLASH 1" >>confdefs.h
$as_echo "no: avrxmega3 .rodata located in RAM" >&6; }
echo "$as_me: nm output was" >&5
cat conftest.nm >&5
- avr_ld_ver="`$gcc_cv_ld -v | sed -e 's:^.* ::'`"
{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: support for avrxmega3 .rodata in flash needs Binutils 2.29 or higher (have $avr_ld_ver)" >&5
$as_echo "$as_me: WARNING: support for avrxmega3 .rodata in flash needs Binutils 2.29 or higher (have $avr_ld_ver)" >&2;}
fi
@@ -28511,7 +28511,71 @@ $as_echo "test failed" >&6; }
{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: see \`config.log' for details" >&5
$as_echo "$as_me: WARNING: see \`config.log' for details" >&2;}
fi
- rm -f conftest.s conftest.o conftest.elf conftest.nm
+ rm -f conftest.o conftest.elf conftest.nm
+
+ # Check for emulation avrxmega2_flmap.
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking binutils for avrxmega2_flmap support (PR31124)" >&5
+$as_echo_n "checking binutils for avrxmega2_flmap support (PR31124)... " >&6; }
+ { ac_try='$gcc_cv_as -mmcu=avrxmega2 conftest.s -o conftest.o'
+ { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; }
+ { ac_try='$gcc_cv_ld -mavrxmega2_flmap conftest.o -o conftest.elf'
+ { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; }
+ if test -s conftest.elf
+ then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+
+$as_echo "#define HAVE_LD_AVR_AVRXMEGA2_FLMAP 1" >>confdefs.h
+
+ else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+ { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: support for avrxmega2_flmap requires Binutils 2.42 or higher (have $avr_ld_ver)" >&5
+$as_echo "$as_me: WARNING: support for avrxmega2_flmap requires Binutils 2.42 or higher (have $avr_ld_ver)" >&2;}
+ { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: see \`config.log' for details" >&5
+$as_echo "$as_me: WARNING: see \`config.log' for details" >&2;}
+ fi
+ rm -f conftest.o conftest.elf
+
+ # Check for emulation avrxmega4_flmap.
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking binutils for avrxmega4_flmap support (PR31124)" >&5
+$as_echo_n "checking binutils for avrxmega4_flmap support (PR31124)... " >&6; }
+ { ac_try='$gcc_cv_as -mmcu=avrxmega4 conftest.s -o conftest.o'
+ { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; }
+ { ac_try='$gcc_cv_ld -mavrxmega4_flmap conftest.o -o conftest.elf'
+ { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; }
+ if test -s conftest.elf
+ then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+
+$as_echo "#define HAVE_LD_AVR_AVRXMEGA4_FLMAP 1" >>confdefs.h
+
+ else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+ { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: support for avrxmega4_flmap requires Binutils 2.42 or higher (have $avr_ld_ver)" >&5
+$as_echo "$as_me: WARNING: support for avrxmega4_flmap requires Binutils 2.42 or higher (have $avr_ld_ver)" >&2;}
+ { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: see \`config.log' for details" >&5
+$as_echo "$as_me: WARNING: see \`config.log' for details" >&2;}
+ fi
+ rm -f conftest.s conftest.o conftest.elf
;;
cris-*-*)
@@ -4549,6 +4549,7 @@ AS_HELP_STRING([--disable-fix-cortex-a53-843419],
[AC_DEFINE(HAVE_AS_AVR_MGCCISR_OPTION, 1,
[Define if your avr assembler supports -mgcc-isr option.])])
+ avr_ld_ver="`$gcc_cv_ld -v | sed -e 's:^.* ::'`"
# Check how default linker description file implements .rodata for
# avrxmega3 (PR21472). avr-gcc assumes .rodata is *not* loaded to
# RAM so avr-gcc skips __do_copy_data for .rodata objects.
@@ -4574,7 +4575,6 @@ EOF
AC_MSG_RESULT(no: avrxmega3 .rodata located in RAM)
echo "$as_me: nm output was" >&AS_MESSAGE_LOG_FD
cat conftest.nm >&AS_MESSAGE_LOG_FD
- avr_ld_ver="`$gcc_cv_ld -v | sed -e 's:^.* ::'`"
AC_MSG_WARN([[support for avrxmega3 .rodata in flash needs Binutils 2.29 or higher (have $avr_ld_ver)]])
fi
else
@@ -4583,7 +4583,39 @@ EOF
cat conftest.s >&AS_MESSAGE_LOG_FD
AC_MSG_WARN([[see `config.log' for details]])
fi
- rm -f conftest.s conftest.o conftest.elf conftest.nm
+ rm -f conftest.o conftest.elf conftest.nm
+
+ # Check for emulation avrxmega2_flmap.
+ AC_MSG_CHECKING(binutils for avrxmega2_flmap support (PR31124))
+ AC_TRY_COMMAND([$gcc_cv_as -mmcu=avrxmega2 conftest.s -o conftest.o])
+ AC_TRY_COMMAND([$gcc_cv_ld -mavrxmega2_flmap conftest.o -o conftest.elf])
+ if test -s conftest.elf
+ then
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_LD_AVR_AVRXMEGA2_FLMAP, 1,
+ [Define if your linker supports emulation avrxmega2_flmap.])
+ else
+ AC_MSG_RESULT(no)
+ AC_MSG_WARN([[support for avrxmega2_flmap requires Binutils 2.42 or higher (have $avr_ld_ver)]])
+ AC_MSG_WARN([[see `config.log' for details]])
+ fi
+ rm -f conftest.o conftest.elf
+
+ # Check for emulation avrxmega4_flmap.
+ AC_MSG_CHECKING(binutils for avrxmega4_flmap support (PR31124))
+ AC_TRY_COMMAND([$gcc_cv_as -mmcu=avrxmega4 conftest.s -o conftest.o])
+ AC_TRY_COMMAND([$gcc_cv_ld -mavrxmega4_flmap conftest.o -o conftest.elf])
+ if test -s conftest.elf
+ then
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_LD_AVR_AVRXMEGA4_FLMAP, 1,
+ [Define if your linker supports emulation avrxmega4_flmap.])
+ else
+ AC_MSG_RESULT(no)
+ AC_MSG_WARN([[support for avrxmega4_flmap requires Binutils 2.42 or higher (have $avr_ld_ver)]])
+ AC_MSG_WARN([[see `config.log' for details]])
+ fi
+ rm -f conftest.s conftest.o conftest.elf
;;
cris-*-*)
@@ -12,71 +12,71 @@
@table @code
-@item avr2
+@item @anchor{avr2}avr2
``Classic'' devices with up to 8@tie{}KiB of program memory.
@*@var{mcu}@tie{}= @code{attiny22}, @code{attiny26}, @code{at90s2313}, @code{at90s2323}, @code{at90s2333}, @code{at90s2343}, @code{at90s4414}, @code{at90s4433}, @code{at90s4434}, @code{at90c8534}, @code{at90s8515}, @code{at90s8535}.
-@item avr25
+@item @anchor{avr25}avr25
``Classic'' devices with up to 8@tie{}KiB of program memory and with the @code{MOVW} instruction.
@*@var{mcu}@tie{}= @code{attiny13}, @code{attiny13a}, @code{attiny24}, @code{attiny24a}, @code{attiny25}, @code{attiny261}, @code{attiny261a}, @code{attiny2313}, @code{attiny2313a}, @code{attiny43u}, @code{attiny44}, @code{attiny44a}, @code{attiny45}, @code{attiny48}, @code{attiny441}, @code{attiny461}, @code{attiny461a}, @code{attiny4313}, @code{attiny84}, @code{attiny84a}, @code{attiny85}, @code{attiny87}, @code{attiny88}, @code{attiny828}, @code{attiny841}, @code{attiny861}, @code{attiny861a}, @code{ata5272}, @code{ata6616c}, @code{at86rf401}.
-@item avr3
+@item @anchor{avr3}avr3
``Classic'' devices with 16@tie{}KiB up to 64@tie{}KiB of program memory.
@*@var{mcu}@tie{}= @code{at76c711}, @code{at43usb355}.
-@item avr31
+@item @anchor{avr31}avr31
``Classic'' devices with 128@tie{}KiB of program memory.
@*@var{mcu}@tie{}= @code{atmega103}, @code{at43usb320}.
-@item avr35
+@item @anchor{avr35}avr35
``Classic'' devices with 16@tie{}KiB up to 64@tie{}KiB of program memory and with the @code{MOVW} instruction.
@*@var{mcu}@tie{}= @code{attiny167}, @code{attiny1634}, @code{atmega8u2}, @code{atmega16u2}, @code{atmega32u2}, @code{ata5505}, @code{ata6617c}, @code{ata664251}, @code{at90usb82}, @code{at90usb162}.
-@item avr4
+@item @anchor{avr4}avr4
``Enhanced'' devices with up to 8@tie{}KiB of program memory.
@*@var{mcu}@tie{}= @code{atmega48}, @code{atmega48a}, @code{atmega48p}, @code{atmega48pa}, @code{atmega48pb}, @code{atmega8}, @code{atmega8a}, @code{atmega8hva}, @code{atmega88}, @code{atmega88a}, @code{atmega88p}, @code{atmega88pa}, @code{atmega88pb}, @code{atmega8515}, @code{atmega8535}, @code{ata6285}, @code{ata6286}, @code{ata6289}, @code{ata6612c}, @code{at90pwm1}, @code{at90pwm2}, @code{at90pwm2b}, @code{at90pwm3}, @code{at90pwm3b}, @code{at90pwm81}.
-@item avr5
+@item @anchor{avr5}avr5
``Enhanced'' devices with 16@tie{}KiB up to 64@tie{}KiB of program memory.
@*@var{mcu}@tie{}= @code{atmega16}, @code{atmega16a}, @code{atmega16hva}, @code{atmega16hva2}, @code{atmega16hvb}, @code{atmega16hvbrevb}, @code{atmega16m1}, @code{atmega16u4}, @code{atmega161}, @code{atmega162}, @code{atmega163}, @code{atmega164a}, @code{atmega164p}, @code{atmega164pa}, @code{atmega165}, @code{atmega165a}, @code{atmega165p}, @code{atmega165pa}, @code{atmega168}, @code{atmega168a}, @code{atmega168p}, @code{atmega168pa}, @code{atmega168pb}, @code{atmega169}, @code{atmega169a}, @code{atmega169p}, @code{atmega169pa}, @code{atmega32}, @code{atmega32a}, @code{atmega32c1}, @code{atmega32hvb}, @code{atmega32hvbrevb}, @code{atmega32m1}, @code{atmega32u4}, @code{atmega32u6}, @code{atmega323}, @code{atmega324a}, @code{atmega324p}, @code{atmega324pa}, @code{atmega324pb}, @code{atmega325}, @code{atmega325a}, @code{atmega325p}, @code{atmega325pa}, @code{atmega328}, @code{atmega328p}, @code{atmega328pb}, @code{atmega329}, @code{atmega329a}, @code{atmega329p}, @code{atmega329pa}, @code{atmega3250}, @code{atmega3250a}, @code{atmega3250p}, @code{atmega3250pa}, @code{atmega3290}, @code{atmega3290a}, @code{atmega3290p}, @code{atmega3290pa}, @code{atmega406}, @code{atmega64}, @code{atmega64a}, @code{atmega64c1}, @code{atmega64hve}, @code{atmega64hve2}, @code{atmega64m1}, @code{atmega64rfr2}, @code{atmega640}, @code{atmega644}, @code{atmega644a}, @code{atmega644p}, @code{atmega644pa}, @code{atmega644rfr2}, @code{atmega645}, @code{atmega645a}, @code{atmega645p}, @code{atmega649}, @code{atmega649a}, @code{atmega649p}, @code{atmega6450}, @code{atmega6450a}, @code{atmega6450p}, @code{atmega6490}, @code{atmega6490a}, @code{atmega6490p}, @code{ata5795}, @code{ata5790}, @code{ata5790n}, @code{ata5791}, @code{ata6613c}, @code{ata6614q}, @code{ata5782}, @code{ata5831}, @code{ata8210}, @code{ata8510}, @code{ata5702m322}, @code{at90pwm161}, @code{at90pwm216}, @code{at90pwm316}, @code{at90can32}, @code{at90can64}, @code{at90scr100}, @code{at90usb646}, @code{at90usb647}, @code{at94k}, @code{m3000}.
-@item avr51
+@item @anchor{avr51}avr51
``Enhanced'' devices with 128@tie{}KiB of program memory.
@*@var{mcu}@tie{}= @code{atmega128}, @code{atmega128a}, @code{atmega128rfa1}, @code{atmega128rfr2}, @code{atmega1280}, @code{atmega1281}, @code{atmega1284}, @code{atmega1284p}, @code{atmega1284rfr2}, @code{at90can128}, @code{at90usb1286}, @code{at90usb1287}.
-@item avr6
+@item @anchor{avr6}avr6
``Enhanced'' devices with 3-byte PC, i.e.@: with more than 128@tie{}KiB of program memory.
@*@var{mcu}@tie{}= @code{atmega256rfr2}, @code{atmega2560}, @code{atmega2561}, @code{atmega2564rfr2}.
-@item avrxmega2
+@item @anchor{avrxmega2}avrxmega2
``XMEGA'' devices with more than 8@tie{}KiB and up to 64@tie{}KiB of program memory.
@*@var{mcu}@tie{}= @code{atxmega8e5}, @code{atxmega16a4}, @code{atxmega16a4u}, @code{atxmega16c4}, @code{atxmega16d4}, @code{atxmega16e5}, @code{atxmega32a4}, @code{atxmega32a4u}, @code{atxmega32c3}, @code{atxmega32c4}, @code{atxmega32d3}, @code{atxmega32d4}, @code{atxmega32e5}, @code{avr64da28}, @code{avr64da32}, @code{avr64da48}, @code{avr64da64}, @code{avr64db28}, @code{avr64db32}, @code{avr64db48}, @code{avr64db64}, @code{avr64dd14}, @code{avr64dd20}, @code{avr64dd28}, @code{avr64dd32}, @code{avr64ea28}, @code{avr64ea32}, @code{avr64ea48}.
-@item avrxmega3
+@item @anchor{avrxmega3}avrxmega3
``XMEGA'' devices with up to 64@tie{}KiB of combined program memory and RAM, and with program memory visible in the RAM address space.
@*@var{mcu}@tie{}= @code{attiny202}, @code{attiny204}, @code{attiny212}, @code{attiny214}, @code{attiny402}, @code{attiny404}, @code{attiny406}, @code{attiny412}, @code{attiny414}, @code{attiny416}, @code{attiny417}, @code{attiny424}, @code{attiny426}, @code{attiny427}, @code{attiny804}, @code{attiny806}, @code{attiny807}, @code{attiny814}, @code{attiny816}, @code{attiny817}, @code{attiny824}, @code{attiny826}, @code{attiny827}, @code{attiny1604}, @code{attiny1606}, @code{attiny1607}, @code{attiny1614}, @code{attiny1616}, @code{attiny1617}, @code{attiny1624}, @code{attiny1626}, @code{attiny1627}, @code{attiny3214}, @code{attiny3216}, @code{attiny3217}, @code{attiny3224}, @code{attiny3226}, @code{attiny3227}, @code{atmega808}, @code{atmega809}, @code{atmega1608}, @code{atmega1609}, @code{atmega3208}, @code{atmega3209}, @code{atmega4808}, @code{atmega4809}, @code{avr16dd14}, @code{avr16dd20}, @code{avr16dd28}, @code{avr16dd32}, @code{avr32da28}, @code{avr32da32}, @code{avr32da48}, @code{avr32db28}, @code{avr32db32}, @code{avr32db48}, @code{avr32dd14}, @code{avr32dd20}, @code{avr32dd28}, @code{avr32dd32}.
-@item avrxmega4
+@item @anchor{avrxmega4}avrxmega4
``XMEGA'' devices with more than 64@tie{}KiB and up to 128@tie{}KiB of program memory.
@*@var{mcu}@tie{}= @code{atxmega64a3}, @code{atxmega64a3u}, @code{atxmega64a4u}, @code{atxmega64b1}, @code{atxmega64b3}, @code{atxmega64c3}, @code{atxmega64d3}, @code{atxmega64d4}, @code{avr128da28}, @code{avr128da32}, @code{avr128da48}, @code{avr128da64}, @code{avr128db28}, @code{avr128db32}, @code{avr128db48}, @code{avr128db64}.
-@item avrxmega5
+@item @anchor{avrxmega5}avrxmega5
``XMEGA'' devices with more than 64@tie{}KiB and up to 128@tie{}KiB of program memory and more than 64@tie{}KiB of RAM.
@*@var{mcu}@tie{}= @code{atxmega64a1}, @code{atxmega64a1u}.
-@item avrxmega6
+@item @anchor{avrxmega6}avrxmega6
``XMEGA'' devices with more than 128@tie{}KiB of program memory.
@*@var{mcu}@tie{}= @code{atxmega128a3}, @code{atxmega128a3u}, @code{atxmega128b1}, @code{atxmega128b3}, @code{atxmega128c3}, @code{atxmega128d3}, @code{atxmega128d4}, @code{atxmega192a3}, @code{atxmega192a3u}, @code{atxmega192c3}, @code{atxmega192d3}, @code{atxmega256a3}, @code{atxmega256a3b}, @code{atxmega256a3bu}, @code{atxmega256a3u}, @code{atxmega256c3}, @code{atxmega256d3}, @code{atxmega384c3}, @code{atxmega384d3}.
-@item avrxmega7
+@item @anchor{avrxmega7}avrxmega7
``XMEGA'' devices with more than 128@tie{}KiB of program memory and more than 64@tie{}KiB of RAM.
@*@var{mcu}@tie{}= @code{atxmega128a1}, @code{atxmega128a1u}, @code{atxmega128a4u}.
-@item avrtiny
+@item @anchor{avrtiny}avrtiny
``TINY'' Tiny core devices with 512@tie{}B up to 4@tie{}KiB of program memory.
@*@var{mcu}@tie{}= @code{attiny4}, @code{attiny5}, @code{attiny9}, @code{attiny10}, @code{attiny102}, @code{attiny104}, @code{attiny20}, @code{attiny40}.
-@item avr1
+@item @anchor{avr1}avr1
This ISA is implemented by the minimal AVR core and supported for assembler only.
@*@var{mcu}@tie{}= @code{attiny11}, @code{attiny12}, @code{attiny15}, @code{attiny28}, @code{at90s1200}.
@@ -882,11 +882,11 @@ Objective-C and Objective-C++ Dialects}.
@emph{AVR Options}
@gccoptlist{-mmcu=@var{mcu} -mabsdata -maccumulate-args
-mbranch-cost=@var{cost}
--mcall-prologues -mgas-isr-prologues -mint8
+-mcall-prologues -mgas-isr-prologues -mint8 -mflmap
-mdouble=@var{bits} -mlong-double=@var{bits}
-mn_flash=@var{size} -mno-interrupts
-mmain-is-OS_task -mrelax -mrmw -mstrict-X -mtiny-stack
--mfract-convert-truncate
+-mrodata-in-ram -mfract-convert-truncate
-mshort-calls -nodevicelib -nodevicespecs
-Waddr-space-convert -Wmisspelled-isr}
@@ -23610,6 +23610,13 @@ the @code{--with-double=} and @code{--with-long-double=}
@w{@uref{https://gcc.gnu.org/install/configure.html#avr,configure options}},
and the same applies for the default values of the options.
+@opindex mflmap
+@item -mflmap
+The device has the @code{FLMAP} bit field located in special function
+register @code{NVMCTRL_CTRLB}.
+This option is used internally by the compiler, and you don't need to
+set it manually.
+
@opindex mgas-isr-prologues
@item -mgas-isr-prologues
Interrupt service routines (ISRs) may use the @code{__gcc_isr} pseudo
@@ -23665,6 +23672,20 @@ section on @code{EIND} and linker stubs below.
Assume that the device supports the Read-Modify-Write
instructions @code{XCH}, @code{LAC}, @code{LAS} and @code{LAT}.
+@opindex mrodata-in-ram
+@item -mrodata-in-ram
+@itemx -mno-rodata-in-ram
+Locate the @code{.rodata} sections for read-only data in RAM resp.@:
+in program memory.
+For most devices, there is no choice and this option acts rather
+like an assertion.
+
+Since v14 and for the AVR64* and AVR128* devices, @code{.rodata}
+is located in flash memory per default, provided the required GNU Binutils
+support (@w{@uref{https://sourceware.org/PR31124,PR31124}}) is available.
+In that case, @option{-mrodata-in-ram} can be used to return to the old
+layout with @code{.rodata} in RAM.
+
@opindex mshort-calls
@item -mshort-calls
@@ -23747,6 +23768,7 @@ Warn if the ISR is misspelled, i.e.@: without __vector prefix.
Enabled by default.
@end table
+@anchor{eind}
@subsubsection @code{EIND} and Devices with More Than 128 Ki Bytes of Flash
@cindex @code{EIND}
Pointers in the implementation are 16@tie{}bits wide.
@@ -23883,6 +23905,7 @@ and the application be linked with @option{-Wl,--defsym,func_4=0x4}.
Alternatively, @code{func_4} can be defined in the linker script.
@end itemize
+@anchor{ramp}
@subsubsection Handling of the @code{RAMPD}, @code{RAMPX}, @code{RAMPY} and @code{RAMPZ} Special Function Registers
@cindex @code{RAMPD}
@cindex @code{RAMPX}
@@ -23925,6 +23948,7 @@ you must reset it to zero after the access.
@end itemize
+@anchor{macros}
@subsubsection AVR Built-in Macros
GCC defines several built-in macros so that the user code can test
@@ -24079,6 +24103,23 @@ description file, and is currently available for
there is no need to use address spaces like @code{__flash} or
features like attribute @code{progmem} and @code{pgm_read_*}.
+@item __AVR_HAVE_FLMAP__
+This macro is defined provided the following conditions are met:
+@itemize @bullet
+@item The device has the @code{NVMCTRL_CTRLB.FLMAP} bitfield.
+This applies to the AVR64* and AVR128* devices.
+@item It's not known at assembler-time which emulation will be used.
+@end itemize
+This implies the compiler was configured with GNU Binutils that implement
+@w{@uref{https://sourceware.org/PR31124,PR31124}}.
+
+@item __AVR_RODATA_IN_RAM__
+This macro is undefined when the code is compiled for a core architecture.
+
+When the code is compiled for a device, the macro is defined to@tie{}1
+when the @code{.rodata} sections for read-only data is located in RAM;
+and defined to@tie{}0, otherwise.
+
@item __WITH_AVRLIBC__
The compiler is configured to be used together with AVR-Libc.
See the @option{--with-avrlibc} configure option.
new file mode 100644
@@ -0,0 +1,15 @@
+/* { dg-do run } */
+/* { dg-options "-Wl,--defsym,__flmap=0" } */
+
+const int val = 1234;
+
+int main (void)
+{
+ const int *p = & val;
+ __asm ("" : "+r" (p));
+
+ if (*p != 1234)
+ __builtin_abort ();
+
+ return 0;
+}